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/* NEXUS 9 / OBSIDIAN AURORA EDITION — premium visual system */
:root{--bg:#070c17;--panel:#0e1a2c;--panel2:#13233a;--line:#293d56;--text:#f4f7ff;--muted:#9eafc6;--blue:#75a6ff;--cyan:#67eadb;--gold:#f4cb8b;--green:#46d8a8;--radius:22px;font-family: 'Segoe UI',Tahoma,Arial,sans-serif}
html{scroll-behavior:smooth}body{background:radial-gradient(ellipse 80% 65% at 10% -20%,#1e22525e 0%,transparent 75%),radial-gradient(ellipse 70% 60% at 95% 0%,#07395860 0%,transparent 72%),#070c17}
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#729dca16}.sidebar-bottom{border-top:1px solid #2a3c53}.topbar{backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);background:#0c1524d9;border-bottom:1px solid #30415b;z-index:10}.crumb{letter-spacing:.3px}.avatar{background:linear-gradient(145deg,#63e4d1,#507fe1)!important;color:#081323!important;box-shadow:0 0 0 3px #6ddaca25}.content{max-width:1680px;width:100%;margin-inline:auto}.eyebrow{letter-spacing:2px;color:#9bc6fb;font-size:10px;font-weight:750}.page-heading{margin-bottom:25px}.page-heading h1{font-size:clamp(26px,3vw,40px);font-weight:800}.page-heading p{line-height:1.95}.page-symbol{background:#1b3350;border:1px solid #416c90;border-radius:18px;box-shadow:0 0 45px #5288a53b;color:#a8dfef}.hero{min-height:300px;isolation:isolate;overflow:hidden;position:relative;background:radial-gradient(ellipse 70% 130% at 90% 75%,#245b8277 0,transparent 75%),linear-gradient(115deg,#183b59,#111d39 55%,#0b192b)!important;border:1px solid #42637f;border-radius:29px;box-shadow:0 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.2s}.btn:hover{transform:translateY(-3px);filter:brightness(1.09)}.btn.primary{background:linear-gradient(110deg,#5bd6d0,#83b7ff)!important;color:#081726!important;box-shadow:0 8px 25px #35bad530}.btn.ghost{background:#ffffff10!important;border:1px solid #ffffff35!important}.stats{gap:16px}.stat{position:relative;overflow:hidden;border:1px solid #344a62;background:linear-gradient(145deg,#17253a,#0f1b2e);border-radius:20px;box-shadow:0 15px 36px #02060c36;transition:transform .2s,border-color .2s}.stat:hover{transform:translateY(-4px);border-color:#76aaec}.stat:after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,#60dacf22,transparent 70%);left:-45px;top:-40px;pointer-events:none}.stat strong{color:#f8fafc;font-variant-numeric:tabular-nums;font-size:clamp(28px,3.2vw,43px)}.stat-label span{color:#74dace}.room-grid{gap:15px}.room{position:relative;isolation:isolate;overflow:hidden;background:linear-gradient(150deg,#16263c,#0e192b);border:1px solid #32465d;border-radius:19px;box-shadow:0 13px 38px #01050b30;transition:transform .24s,border-color .24s,box-shadow .24s}.room:before{content:"";width:180px;height:180px;position:absolute;left:-80px;top:-90px;background:radial-gradient(circle,#31a9ac22,transparent 70%);pointer-events:none}.room:hover{transform:translateY(-6px);border-color:#75afce;box-shadow:0 23px 38px #01050b70}.room-icon{border:1px solid #55c8dc35;background:#19435a!important;border-radius:13px;color:#80f2ea!important}.room h3{font-size:19px}.room-bottom{border-top:1px solid #283b51}.panel,.board-card,.lesson-row,.attendance-row{box-shadow:0 14px 36px #02050c26;border-color:#34465e}.panel{border-radius:21px;background:linear-gradient(160deg,#111f33,#0e192b)}.section-title{margin-top:29px}.section-title h2{font-size:23px}.section-title a{color:#9fd8ef}thead{background:#1b3048}th{color:#a9c2df}tr:hover td{background:#6ab9ec0b}.status-pill.active{box-shadow:0 0 0 3px #36dfa511}.page-heading .eyebrow{color:#ebc78d}.board-screen{background:radial-gradient(circle at center,#2a567c,#091528 75%);box-shadow:inset 0 0 45px #0007}.board-card:hover{transform:translateY(-4px);border-color:#6c9fcf}.login-body{background:radial-gradient(circle at 10% 5%,#3446867a,transparent 40%),radial-gradient(circle at 85% 90%,#19546564,transparent 45%),#080e1a}.login-card{width:min(480px,100%);padding:48px;background:linear-gradient(145deg,#18283feF,#0a1424f5);border:1px solid #506a84;box-shadow:0 30px 110px #0009,0 0 90px #206c8730}.login-logo{animation:nexusRotate 22s linear infinite}.login-card h1{font-size:28px}.login-card input{min-height:49px}.board-actions a,.action-grid a{transition:transform .2s,background .2s}.board-actions a:hover,.action-grid a:hover{transform:translateY(-4px)}.deck-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:16px}.deck-heading h2{margin:8px 0 0;font-size:23px}.deck-marker{font:700 12px Consolas,monospace;color:#8db5d5;direction:ltr}.command-deck{margin:27px 0 10px}.deck-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.deck-action{display:flex;align-items:center;gap:13px;padding:17px 15px;min-height:99px;border:1px solid #35516c;border-radius:18px;background:linear-gradient(135deg,#19344d,#112136);box-shadow:0 13px 30px #0003;transition:transform .2s,border .2s}.deck-action:hover{transform:translateY(-4px);border-color:#76bfe1}.deck-icon{display:grid;place-items:center;border-radius:14px;flex-shrink:0;width:48px;height:48px;font-size:24px;background:linear-gradient(140deg,#316c83,#214165);color:#bcf5eb}.deck-action b{font:750 12px 'Segoe UI',Arial,sans-serif;display:block;direction:ltr;text-align:right;color:#edf7ff}.deck-action small{font-size:11px;display:block;margin-top:7px}.deck-arrow{margin-inline-start:auto;color:#9cc8de;font-size:20px}.footer{color:#768ba6}.board-body,.whiteboard-body,.quiz-body{background:radial-gradient(circle at 80% 0,#182e58,transparent 50%),#080f1e}.board-welcome h1{background:linear-gradient(110deg,#fff,#97f1e6);background-clip:text;-webkit-background-clip:text;color:transparent}
@keyframes nexusRotate{0%,100%{filter:drop-shadow(0 0 9px #42c6df80)}50%{filter:drop-shadow(0 0 26px #42c6dfaa)}}
@media (max-width:1200px){.deck-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:580px){.hero{min-height:auto;padding:27px}.hero:after{left:73%;top:0}.stats{gap:10px}.stat strong{font-size:29px}.deck-grid{grid-template-columns:1fr}.command-deck{margin-top:20px}.deck-heading h2{font-size:19px}.login-card{padding:32px 23px}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body:before{display:none}.command-deck{display:none}.stat,.panel{box-shadow:none}}

/* NEXUS 9 Global NRT typography: applies to every PHP page and board.
   Place licensed NRT.ttf and NRT-Bd.ttf in assets/fonts/. */
@font-face{font-family:'NRT';src:local('NRT'),url('../fonts/NRT.ttf') format('truetype');font-style:normal;font-weight:100 500;font-display:swap}
@font-face{font-family:'NRT';src:local('NRT Bd'),local('NRT-Bd'),url('../fonts/NRT-Bd.ttf') format('truetype');font-style:normal;font-weight:600 900;font-display:swap}
:root{--nrt-font:'NRT',Tahoma,Arial,sans-serif;font-family:var(--nrt-font)!important}
html,body,body *:not(svg):not(path):not(circle):not(line):not(rect):not(polyline):not(polygon){font-family:var(--nrt-font)!important}
input,button,textarea,select,option,table,th,td,canvas{font-family:var(--nrt-font)!important}

/* NEXUS Live Teacher Control - Obsidian Aurora */
.tracking-shell{display:grid;gap:24px}.tracking-hero{position:relative;overflow:hidden;min-height:210px;padding:36px 40px;border-radius:27px;border:1px solid #36507a;background:radial-gradient(ellipse at 77% 18%,#256f88a0 0,transparent 42%),linear-gradient(130deg,#0d1830,#162a4e 65%,#131b34);display:flex;justify-content:space-between;align-items:center;box-shadow:0 22px 55px #02071470}.tracking-hero:after{content:'';position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 27px,#c0e6ff05 28px);pointer-events:none}.tracking-hero h2{font-size:clamp(25px,3vw,40px);color:#fff;margin:12px 0}.tracking-hero p{color:#b7c9e2;margin:0}.tracking-orb{display:grid;place-items:center;position:relative;border:2px solid #72d8ecaa;width:126px;height:126px;border-radius:50%;box-shadow:inset 0 0 35px #54b9f266,0 0 70px #13afcc47;color:#b1efff;font-size:65px;flex-shrink:0}.tracking-orb small{position:absolute;bottom:13px;right:21px;font-size:12px}.tracking-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.tracking-stat{border:1px solid #344560;background:linear-gradient(150deg,#1d304e,#111e35);border-radius:18px;padding:19px 22px;display:grid;gap:6px}.tracking-stat small{color:#b5c9e2}.tracking-stat strong{font-size:38px;line-height:1.15;color:#fff;font-variant-numeric:tabular-nums}.tracking-stat span{color:#65d9ea;font-size:10px;letter-spacing:1.4px}.tracking-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.tracking-head h3{margin:0;color:#fff}.tracking-time{display:flex;align-items:center;gap:9px;color:#afcbe5;font-size:12px}.tracking-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.tracking-room{background:linear-gradient(150deg,#1b2e4b,#0e1b2f);border:1px solid #3b506c;border-radius:22px;padding:22px;min-width:0;position:relative;overflow:hidden;transition:transform .2s,border-color .2s}.tracking-room:hover{transform:translateY(-4px);border-color:#71caea}.tracking-room:before{content:'';height:3px;position:absolute;left:0;right:0;top:0;background:#68809e}.tracking-room.live:before{background:#45dea6;box-shadow:0 0 20px #45dea6}.tracking-room.scheduled:before{background:#f4bd6a}.tracking-room.disconnected:before{background:#ff7f86}.tracking-room-top{display:flex;justify-content:space-between;align-items:center}.tracking-room-icon{color:#6fdff6;font-size:30px}.tracking-status{display:flex;align-items:center;gap:6px;color:#bfcee3;font-size:12px}.tracking-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#70829b;box-shadow:0 0 9px currentColor}.live .tracking-dot,.tracking-dot.green{background:#45dea6;color:#45dea6}.scheduled .tracking-dot,.tracking-dot.yellow{background:#ffcb77;color:#ffcb77}.disconnected .tracking-dot,.tracking-dot.red{background:#ff7f86;color:#ff7f86}.tracking-number{letter-spacing:1.8px;font-size:11px;color:#78c5ea;margin-top:7px}.tracking-room h3{color:#fff;font-size:23px;margin:4px 0 16px}.tracking-info{display:grid;gap:10px}.tracking-info div{display:flex;align-items:baseline;justify-content:space-between;gap:9px;border-bottom:1px solid #52637a46;padding-bottom:8px}.tracking-info small{color:#94a9c5}.tracking-info b{color:#f1f6ff;font-size:13px;text-align:left}.tracking-room-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:20px;font-size:11px;color:#a8bfda}.tracking-room-bottom a{color:#8bdeff;text-decoration:none}.tracking-bottom{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.tracking-bottom>div{background:#14243c;border:1px solid #314560;border-radius:14px;padding:15px}.tracking-bottom b{color:#eef5ff;display:flex;gap:8px;align-items:center;font-size:13px}.tracking-bottom p{margin:7px 0 0;color:#9eb3d0;font-size:12px}.tracking-loading{padding:35px;border:1px dashed #547394;border-radius:20px;color:#a9cbe1;grid-column:1/-1;text-align:center}.teacher-session-panel{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px 27px;border:1px solid #45b9bf77;border-radius:21px;background:linear-gradient(120deg,#112c3e,#132444);margin:21px 0}.teacher-session-panel h3{color:white;margin:5px 0;font-size:21px}.teacher-session-panel p{color:#b1c9dc;font-size:13px;margin:0}.teacher-session-panel form{flex-shrink:0}
@media(max-width:1060px){.tracking-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tracking-stats{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:650px){.tracking-grid,.tracking-stats,.tracking-bottom{grid-template-columns:1fr}.tracking-hero{padding:26px;min-height:160px}.tracking-orb{width:75px;height:75px;font-size:36px}.tracking-head,.teacher-session-panel{flex-direction:column;align-items:stretch}}


/* ===========================================================
   NEXUS 9 — AURORA SPECTRUM | Global System Visual Overhaul
   Shared across login, admin, 9 boards, reports and classroom
   =========================================================== */
:root{--bg:#0b1027;--panel:#171e3f;--panel2:#1c2851;--line:#364275;--text:#f8f7ff;--muted:#b8c1e5;--blue:#727aff;--cyan:#30e1da;--gold:#ffd173;--green:#53e6ad;--violet:#ac78ff;--pink:#ff6db5;--orange:#ffac5e;--radius:23px;color-scheme:dark}
html{scroll-behavior:smooth}
body{background:radial-gradient(ellipse 65% 50% at 8% -8%,#7f52d52b 0%,transparent 75%),radial-gradient(ellipse 50% 55% at 96% 5%,#169ee32c 0%,transparent 78%),radial-gradient(ellipse 40% 55% at 60% 105%,#ff69b51b 0%,transparent 77%),#0b1027;background-attachment:fixed;color:#f8f7ff}
body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);background-size:48px 48px;opacity:.018}
.app,.login-body>*{position:relative;z-index:1}
.sidebar{background:linear-gradient(190deg,#201943,#141a38 52%,#18183c);border-left:1px solid #796bcd4d;box-shadow:-9px 0 44px #050b276b}
.brand{border-color:#6c71b43b}.brand-mark{color:#ffc976;filter:drop-shadow(0 0 18px #ff9f68a3);animation:nexusFloat 5s ease-in-out infinite}.brand em{color:#f9a9f2}.brand b{color:#fff}
.nav-caption{color:#a8a6df;letter-spacing:1.7px}.nav-link{border:1px solid transparent;color:#c0c9ea;font-weight:650;transition:transform .22s,background .22s,border .22s,box-shadow .22s}.nav-link:hover{transform:translateX(-3px);background:#ffffff10;border-color:#8f88ee50;color:#fff}.nav-link.selected{background:linear-gradient(110deg,#765afa6b,#f068b535);border-color:#a9a3ff79;box-shadow:inset -3px 0 #ffb4d7,0 9px 20px #3d288b30}.nav-ico{background:linear-gradient(135deg,#43467e,#40326c);color:#e7c1ff;border:1px solid #ada6ff32}.nav-link:nth-child(5n + 2) .nav-ico{color:#74edeb;background:#21617466}.nav-link:nth-child(5n + 3) .nav-ico{color:#ffbe7f;background:#75502966}.nav-link:nth-child(5n + 4) .nav-ico{color:#ffa1c7;background:#7b325966}.nav-link:nth-child(5n + 5) .nav-ico{color:#a8ffcd;background:#24654f66}.nav-dot{background:#ffcc80;box-shadow:0 0 10px #ffc579}
.topbar{background:#181c3bd6;backdrop-filter:blur(20px);border-color:#888ae642;height:88px}.crumb{color:#eeeaff}.crumb span{color:#ec83d0}.clock{color:#9ce9ff}.avatar,.mini-avatar{background:linear-gradient(135deg,#8268ff,#fc6dba 60%,#ffb879);box-shadow:0 5px 17px #f46ebb48}.logout{background:#ffffff0b;border-color:#ffffff29;color:white}.logout:hover{background:#fa6fa230}
.content{padding-top:38px}.eyebrow{color:#b6b5ff}.page-heading h1{font-size:clamp(27px,3vw,39px);background:linear-gradient(100deg,#fff,#c6bbff 60%,#82eeed);background-clip:text;color:transparent}.page-heading p{color:#c0c8e4}.page-symbol{color:#ff91d4;text-shadow:0 0 25px #ed73e2;font-size:70px}
.hero,.tracking-hero{background:radial-gradient(circle at 84% 27%,#ffb45d3c,transparent 35%),radial-gradient(circle at 25% 86%,#51f2d03a,transparent 48%),linear-gradient(115deg,#45348b,#29295a 47%,#243f6e);border:1px solid #a6a9ff87;box-shadow:0 22px 60px #070b2e65,inset 0 1px #ffffff35}.hero:before{background:repeating-linear-gradient(110deg,transparent 0 65px,#ffffff05 66px 67px),radial-gradient(circle at 80% 50%,#fcb0ea24,transparent 34%)}.hero h2,.tracking-hero h2{color:#fff;text-shadow:0 3px 18px #0b08386e}.hero p,.tracking-hero p{color:#e1e8ff}.hero-orbit{background:radial-gradient(circle,#653eaf,#343a88 54%,#fface45e 58%,transparent 61%);box-shadow:0 0 0 19px #cf95ff1c,0 0 0 38px #ffb6cb0d,0 0 70px #a887e65b}.hero-orbit strong{color:#ffe18e;text-shadow:0 0 28px #ffb759}
.stat,.panel,.room,.board-card,.tracking-stat,.tracking-room,.tracking-bottom>div{background:linear-gradient(145deg,#242852e8,#172143ee);border:1px solid #646caa70;box-shadow:0 13px 35px #090b2866,inset 0 1px #ffffff0b;backdrop-filter:blur(8px)}.panel{border-radius:23px}.stat{border-radius:22px;position:relative;overflow:hidden;min-height:145px}.stat:before{content:"";position:absolute;right:0;top:0;width:100%;height:4px;background:linear-gradient(90deg,#59e4df,#aa87ff,#ff87c1)}.stat:nth-child(4n+1){background:linear-gradient(142deg,#263c70,#1a244a)}.stat:nth-child(4n+1):before{background:linear-gradient(90deg,#5cf1e4,#65b5ff)}.stat:nth-child(4n+2){background:linear-gradient(142deg,#44316f,#211f4a)}.stat:nth-child(4n+2):before{background:linear-gradient(90deg,#aa8aff,#f28dea)}.stat:nth-child(4n+3){background:linear-gradient(142deg,#563050,#262247)}.stat:nth-child(4n+3):before{background:linear-gradient(90deg,#ff8fbd,#ffca78)}.stat:nth-child(4n+4){background:linear-gradient(142deg,#24574e,#172f42)}.stat:nth-child(4n+4):before{background:linear-gradient(90deg,#55e5aa,#b1ef78)}.stat-label{color:#e1e5ff}.stat-label span{color:#ffc2f1}.stat strong{color:#fff;text-shadow:0 3px 13px #0f15308a}.stat small{color:#d9daf3}
.room,.board-card{transition:transform .25s,box-shadow .25s,border-color .25s}.room:nth-child(6n+1),.tracking-room:nth-child(6n+1){border-top:3px solid #63e6e1}.room:nth-child(6n+2),.tracking-room:nth-child(6n+2){border-top:3px solid #b39aff}.room:nth-child(6n+3),.tracking-room:nth-child(6n+3){border-top:3px solid #ff9cc2}.room:nth-child(6n+4),.tracking-room:nth-child(6n+4){border-top:3px solid #ffcb7b}.room:nth-child(6n+5),.tracking-room:nth-child(6n+5){border-top:3px solid #83eea2}.room:nth-child(6n+6),.tracking-room:nth-child(6n+6){border-top:3px solid #82b3ff}.room:hover,.board-card:hover,.tracking-room:hover{transform:translateY(-5px);box-shadow:0 22px 48px #080a2a99;border-color:#ad9eff}.room-icon,.lesson-glyph,.file-icon{background:linear-gradient(130deg,#7252c7a6,#3084ab6b);color:#d5fbff;border:1px solid #ae9bea68}
.section-title h2,.panel-title h2,.form-panel h2{color:#fff}.section-title>a,.tracking-room-bottom a{color:#90fff0}.panel-title{border-bottom:1px solid #ffffff15;padding-bottom:14px}
.btn{border:1px solid #8c8dd269;background:#292b59;color:#f5f4ff;border-radius:13px;transition:transform .2s,filter .2s,box-shadow .2s;font-weight:750}.btn:hover{transform:translateY(-2px);filter:brightness(1.15);box-shadow:0 11px 23px #11123c88}.btn.primary{background:linear-gradient(115deg,#675fff,#b15eff 50%,#ed6fb2);border-color:#c3a7ff;color:white;box-shadow:0 9px 28px #a458e36b}.btn.ghost{background:#ffffff13;border-color:#ffffff3f}
input,select,textarea{background:#111a3bc7;border:1px solid #7f82bf80;color:#fff;border-radius:13px;min-height:45px}input:focus,select:focus,textarea:focus{border-color:#c5a5ff;box-shadow:0 0 0 3px #9f79ff38}input::placeholder,textarea::placeholder{color:#999fcc}select option{background:#232451}.stack label,.filters label{color:#e5e2ff}
table{border-collapse:separate;border-spacing:0 4px}th{background:#333069;color:#e2dbff;padding:16px}td{background:#1e2850;border-bottom:1px solid #56619a42;color:#e3e7ff}tbody tr:hover td{background:#34356b}tr td:first-child{border-radius:0 10px 10px 0}tr td:last-child{border-radius:10px 0 0 10px}
.lesson-row,.attendance-row{background:#252b59;border-color:#6d71ae66}.lesson-row:hover,.attendance-row:hover{border-color:#b18aff}.lesson-glyph{color:#baf8ff}.lesson-name p,.lesson-name small{color:#c1caec}.attendance-row select{min-height:40px}.mini-avatar{color:#fff}
.status-pill{background:#704b48;color:#ffe0a1}.status-pill.active,.status-pill.completed{background:#1d6956;color:#baffdf}.status-pill.scheduled,.status-pill.idle{background:#464a77;color:#dddaff}.alert{background:#195f58;border-color:#3de5c08a;color:#d7ffeb}.alert.danger{background:#6a294d;color:#ffe2ed;border-color:#ef70af}
.tracking-stat:nth-child(4n+1){background:linear-gradient(145deg,#254f74,#1e2752)}.tracking-stat:nth-child(4n+2){background:linear-gradient(145deg,#523e79,#222750)}.tracking-stat:nth-child(4n+3){background:linear-gradient(145deg,#704061,#28264e)}.tracking-stat:nth-child(4n+4){background:linear-gradient(145deg,#2b695c,#1c2d4e)}.tracking-stat span{color:#93f5e6}.tracking-room{border-radius:24px}.tracking-room.live:before{background:#4ce6b4}.tracking-room.scheduled:before{background:#ffcc75}.tracking-room h3{color:#fff}.tracking-info b{color:#fff}.teacher-session-panel{background:linear-gradient(120deg,#303d85,#355a79);border-color:#8eace3}
.login-body{min-height:100vh;background:radial-gradient(ellipse at 16% 20%,#895aff66,transparent 42%),radial-gradient(ellipse at 83% 70%,#fc5cbb4d,transparent 40%),radial-gradient(ellipse at 50% 95%,#3de8c72b,transparent 42%),#101433;display:flex;justify-content:center;align-items:center;padding:26px;isolation:isolate}.login-body:after{content:"NEXUS 9  ✦  FUTURE OF LEARNING";position:fixed;top:6%;right:5%;left:5%;color:#ffffff23;letter-spacing:5px;font:900 clamp(18px,3vw,48px) Arial;text-align:center;pointer-events:none}.login-card{width:min(100%,515px);background:linear-gradient(145deg,#302c67ed,#1b2752f2);border:1px solid #c6b0ff80;border-radius:30px;padding:clamp(25px,4vw,52px);box-shadow:0 45px 110px #05082da6,0 0 90px #ad5dff25;backdrop-filter:blur(20px)}.login-logo{background:linear-gradient(130deg,#8364ff,#f571b3,#ffcb83);color:white;box-shadow:0 13px 35px #f274b863;border-radius:22px}.login-card h1{color:#fff}.login-card h1 span{background:linear-gradient(90deg,#8df8e2,#f0b5ff,#ffdb98);background-clip:text;color:transparent}.login-card p{color:#d9dcff}.login-footer{color:#b6bfed}.login-glow{background:radial-gradient(circle,#ae70fc44,transparent 70%)}
.quiz-body,.board-body{background:radial-gradient(circle at top right,#804bdd4c,transparent 50%),radial-gradient(circle at bottom left,#24bea347,transparent 55%),#111536}.question-box,.quiz-container,.scoreboard,.wb-top,.wb-tools,.wb-footer{border-color:#8588c264;background:linear-gradient(145deg,#25285c,#18254b)}
.footer{border-color:#8984d633;color:#a9b9e5}.footer span{color:#bc9ff7}
@keyframes nexusFloat{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-5px) rotate(9deg)}}
@media(max-width:1100px){.content{padding:23px}.topbar{padding:0 23px}}@media(max-width:700px){.content{padding:17px}.login-card{padding:25px}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding:26px}.stat{padding:17px}.tracking-stat{padding:15px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}

/* NEXUS 9 SCHOOL BELL STUDIO */
.break-admin-hero{border-radius:27px;background:linear-gradient(116deg,#9b1748,#ed4761 57%,#ffad62);display:flex;justify-content:space-between;align-items:center;padding:32px;position:relative;overflow:hidden;box-shadow:0 18px 45px #ce265634;color:white;margin-bottom:24px}.break-admin-hero h2{font-size:clamp(26px,3vw,43px);color:white;margin:8px 0}.break-admin-hero p{color:#fffdeb}.break-admin-hero .eyebrow{color:#ffe4ea}.break-hero-orb{font-size:90px;transform:rotate(-13deg);filter:drop-shadow(0 12px 15px #66001b66)}.break-state-chip{border:1px solid #ffffff73;background:#ffffff25;border-radius:30px;padding:9px 16px;display:inline-block;font-weight:800}.break-admin-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.break-control-card{padding:26px;border-radius:24px;background:linear-gradient(155deg,#242443,#161d37);border:1px solid #ffffff20;box-shadow:0 18px 38px #03031424}.break-control-card h3{font-size:22px;color:white;margin:0 0 12px}.break-control-card p{color:#c7cce7;line-height:1.8}.break-control-card form{display:grid;gap:13px}.break-control-card label{color:#edf0ff;font-weight:700}.break-control-card input,.break-control-card select{width:100%;border:1px solid #59607f;background:#11192f;color:white;border-radius:13px;padding:12px;font:inherit}.break-control-card input[type=color]{height:53px;padding:5px}.break-button-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.break-button-grid button,.break-save,.break-delete{border:0;border-radius:13px;padding:14px;font:inherit;font-weight:800;cursor:pointer}.break-launch{background:linear-gradient(105deg,#f41f54,#ff784b);color:white}.break-stop{background:#393a5c;color:white}.break-auto{background:#2f7e86;color:white;grid-column:1/-1}.break-save{background:linear-gradient(90deg,#7056ff,#c54ef1);color:white}.break-schedule-section{margin-top:22px}.break-schedule-form{grid-template-columns:2fr 1fr 1fr;align-items:end}.break-days{grid-column:1/-1;display:flex;gap:10px;flex-wrap:wrap}.break-days label{display:flex;gap:5px;align-items:center;border:1px solid #ffffff25;border-radius:12px;padding:10px}.break-days input{width:auto}.break-slot-list{margin-top:20px;display:grid;gap:10px}.break-slot{display:flex;align-items:center;justify-content:space-between;padding:12px 15px;border-radius:14px;background:#ffffff0d;color:white}.break-slot span{display:flex;flex-direction:column;gap:5px}.break-slot small{color:#bdc7e6}.break-delete{background:#742c48;color:#fff}
.nexus-break-overlay[hidden]{display:none!important}.nexus-break-overlay{--break-accent:#ff374e;position:fixed;inset:0;z-index:99999;background:radial-gradient(circle at 70% 25%,#ffb55a66,transparent 35%),linear-gradient(135deg,#8e0b34 0%,var(--break-accent) 56%,#fa7e3e 100%);color:#fff;overflow:hidden;font-family:NRT,'NRT',sans-serif}.nexus-break-show{overflow:hidden!important}.nexus-break-bloom{position:absolute;border:2px solid #ffffff25;border-radius:50%;pointer-events:none}.bloom-one{width:70vw;height:70vw;top:-48vw;left:-20vw}.bloom-two{width:85vw;height:85vw;bottom:-63vw;right:-24vw;box-shadow:0 0 0 70px #ffffff0c,0 0 0 150px #ffffff09}.nexus-break-inner{position:relative;z-index:2;height:100%;min-height:100%;padding:clamp(22px,4vw,56px);display:flex;flex-direction:column;justify-content:space-between;text-align:center}.nexus-break-top,.nexus-break-bottom{display:flex;justify-content:space-between;gap:10px;align-items:center;direction:ltr;font-weight:800;letter-spacing:.04em;text-shadow:0 2px 6px #50002455}.nexus-break-bottom{direction:rtl}.nexus-break-main{display:grid;justify-items:center;gap:clamp(8px,1.3vh,19px);margin:auto 0}.nexus-break-emoji{font-size:clamp(40px,6vw,92px);filter:drop-shadow(0 13px 7px #7d083866)}.nexus-break-kicker{font-size:clamp(12px,1.4vw,21px);font-weight:800;letter-spacing:3px}.nexus-break-main h1{font-family:NRT,'NRT',sans-serif!important;color:#fff!important;font-size:clamp(60px,10vw,155px)!important;line-height:1.28!important;margin:0!important;text-shadow:0 12px 32px #69002675;letter-spacing:-.03em}.nexus-break-main p{font-size:clamp(18px,2.2vw,33px);margin:0;color:#fff8ea}.nexus-break-timer{direction:ltr;font-weight:900;font-variant-numeric:tabular-nums;font-size:clamp(55px,9vw,145px);line-height:1.1;background:#ffffff28;border:2px solid #ffffff60;border-radius:30px;padding:10px 54px;box-shadow:0 14px 38px #6e001d44;backdrop-filter:blur(10px)}.nexus-break-timerlabel{font-size:clamp(16px,1.6vw,25px);color:#fff9ed}@media(max-width:750px){.break-admin-grid,.break-schedule-form{grid-template-columns:1fr}.break-days{grid-column:1}.break-hero-orb{font-size:48px}.break-admin-hero{padding:22px}.nexus-break-top,.nexus-break-bottom{font-size:11px}.nexus-break-timer{padding:12px 26px}}

/* NEXUS 9 · Role dashboards */
.teacher-hero{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:25px;padding:34px;border:1px solid #9e8afe55;border-radius:27px;background:radial-gradient(circle at 88% 30%,#fc79c466,transparent 35%),linear-gradient(116deg,#35276a,#194e80 65%,#166c72);color:#fff;margin:20px 0 24px;box-shadow:0 20px 55px #241e574d}
.teacher-hero-copy{position:relative;z-index:1;max-width:700px}.teacher-hero h2{font-size:clamp(25px,3vw,39px);line-height:1.4;margin:10px 0}.teacher-hero p{color:#e3e7ff;line-height:1.9}.teacher-hero-art{min-width:155px;display:grid;place-items:center}.teacher-hero-art span{font-size:94px;color:#ffcc86;filter:drop-shadow(0 0 24px #e69ffc);animation:teacherFloat 5s ease-in-out infinite}.teacher-hero-art small{color:#d7e8ff;letter-spacing:2px;text-align:center}
.teacher-stats .stat:nth-child(1){border-top:3px solid #a79bff}.teacher-stats .stat:nth-child(2){border-top:3px solid #59dfbb}.teacher-stats .stat:nth-child(3){border-top:3px solid #ffc56a}.teacher-stats .stat:nth-child(4){border-top:3px solid #ff78c3}
.teacher-two-col{display:grid;grid-template-columns:1.15fr 1fr;gap:20px;margin:22px 0}.teacher-topic{padding:18px 2px}.teacher-topic small{color:#9ddbf7}.teacher-topic h2{font-size:clamp(21px,3vw,31px);margin:12px 0}.teacher-topic p{opacity:.75}.teacher-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.teacher-actions a{color:#fff;display:flex;flex-direction:column;gap:10px;text-decoration:none;min-height:104px;padding:20px;border:1px solid #ffffff20;border-radius:17px;background:linear-gradient(140deg,#34366d99,#20365b);transition:transform .2s,background .2s}.teacher-actions a:hover{transform:translateY(-3px);background:#494687}.teacher-actions span{font-size:28px}.teacher-timeline{display:flex;flex-direction:column;gap:8px}.teacher-timeline-item{color:inherit;text-decoration:none;display:flex;align-items:center;gap:18px;padding:15px;border-radius:13px;border:1px solid #ffffff15;background:#ffffff09}.teacher-timeline-item:hover{background:#ffffff18}.teacher-time{font-variant-numeric:tabular-nums;color:#91deef;min-width:92px;direction:ltr}.teacher-timeline-info{display:flex;flex-direction:column;gap:4px;flex:1}.teacher-timeline-info small{opacity:.65}
@keyframes teacherFloat{50%{transform:translateY(-12px) rotate(8deg)}}@media(max-width:850px){.teacher-two-col{grid-template-columns:1fr}.teacher-hero-art{min-width:80px}.teacher-hero-art span{font-size:60px}}@media(max-width:520px){.teacher-hero{padding:22px}.teacher-hero-art{display:none}.teacher-time{min-width:72px}.teacher-timeline-item{gap:8px}}

/* NEXUS 9 · Teacher Selection Portal · Aurora Spectrum */
.portal-body{min-height:100vh;background:radial-gradient(ellipse at 12% 12%,#894af952,transparent 36%),radial-gradient(ellipse at 90% 8%,#19bde943,transparent 38%),radial-gradient(ellipse at 51% 90%,#fa53a42e,transparent 42%),#090f25;color:#fff;font-family:NRT,'NRT',sans-serif;overflow-x:hidden}.portal-orbit{position:fixed;width:420px;height:420px;border:1px solid #ffffff14;border-radius:50%;pointer-events:none;z-index:0}.portal-orbit-one{right:-250px;top:170px;box-shadow:0 0 0 60px #8e5fff0b,0 0 0 130px #8e5fff06}.portal-orbit-two{left:-290px;bottom:0;box-shadow:0 0 0 90px #27e9f00b}.portal-wrap{position:relative;z-index:1;max-width:1360px;margin:0 auto;padding:28px clamp(18px,4vw,62px) 36px}.portal-head{display:flex;justify-content:space-between;align-items:center;gap:18px}.portal-brand{display:flex;gap:15px;align-items:center;direction:ltr}.portal-brand>span{font-size:45px;color:#f9bbff;text-shadow:0 0 24px #db74ff}.portal-brand strong{display:block;font-size:26px;letter-spacing:1px}.portal-brand em{color:#f9addb;font-style:normal}.portal-brand small{display:block;font-size:10px;letter-spacing:2px;color:#a4b6df}.portal-network{font:700 11px Arial,sans-serif;letter-spacing:1px;color:#b4ecdb;border:1px solid #3dbb9566;background:#1a694633;border-radius:30px;padding:11px 17px;direction:ltr}.portal-network i{display:inline-block;width:8px;height:8px;margin-right:7px;border-radius:50%;background:#5cf5b2;box-shadow:0 0 12px #5cf5b2}.portal-intro{text-align:center;padding:55px 12px 42px}.portal-tag{display:inline-block;color:#b4acff;font-size:12px;font-weight:800;letter-spacing:1.7px}.portal-intro h1{font-size:clamp(34px,4.6vw,66px);line-height:1.4;margin:12px 0;color:#fff}.portal-intro h1 span{background:linear-gradient(100deg,#80f4ed,#b5a2ff,#ffa6d4);background-clip:text;color:transparent}.portal-intro p{max-width:750px;margin:auto;color:#c3cee9;font-size:17px;line-height:2}.portal-title{display:flex;justify-content:space-between;align-items:end;gap:14px;margin-bottom:20px}.portal-title span{font:800 11px Arial;color:#a3ace8;letter-spacing:2px}.portal-title h2{font-size:30px;margin:5px 0 0}.portal-count{border:1px solid #a193ff66;border-radius:30px;color:#d5c7ff;padding:9px 18px;background:#8d6bff1c;font-weight:700}.portal-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:18px}.portal-teacher-card{margin:0}.portal-card-button{font:inherit;width:100%;height:100%;display:flex;flex-direction:column;align-items:flex-start;text-align:right;gap:10px;padding:24px;border-radius:24px;color:#fff;cursor:pointer;background:linear-gradient(150deg,hsl(var(--teacher-hue) 50% 30% / .65),#161e41 78%);border:1px solid hsl(var(--teacher-hue) 76% 75% / .42);box-shadow:0 12px 35px #05091f88,inset 0 1px #ffffff22;transition:transform .25s,box-shadow .25s,border-color .25s}.portal-card-button:hover,.portal-card-button:focus-visible{transform:translateY(-7px);box-shadow:0 22px 48px hsl(var(--teacher-hue) 82% 58% / .24);border-color:hsl(var(--teacher-hue) 88% 75%)}.portal-avatar,.faculty-avatar{width:78px;height:78px;display:grid;place-items:center;border-radius:24px;background:linear-gradient(135deg,hsl(var(--teacher-hue) 89% 68%),hsl(var(--teacher-hue) 67% 44%));box-shadow:0 9px 25px #0004;color:#fff;font-size:35px;font-weight:900}.portal-card-role{color:#b6c8e9;font:800 10px Arial;letter-spacing:2px}.portal-card-button strong{font-size:21px;line-height:1.6}.portal-card-action{width:100%;margin-top:auto;padding-top:12px;border-top:1px solid #ffffff25;display:flex;justify-content:space-between;color:#d8e6ff;font-size:13px}.portal-card-action b{font-size:20px}.portal-admin-wrap{margin:38px auto 0;max-width:650px}.portal-admin-open{font:inherit;cursor:pointer;width:100%;display:flex;align-items:center;gap:18px;text-align:right;background:linear-gradient(120deg,#352752,#26335a);border:1px solid #e9bd7f88;border-radius:24px;padding:20px 25px;color:#fff;box-shadow:0 16px 34px #06091f78}.portal-admin-open:hover{border-color:#ffd8a2;background:#403064}.portal-admin-icon,.portal-admin-emblem{display:grid;place-items:center;font-size:37px;width:66px;height:66px;flex:none;border-radius:19px;background:linear-gradient(145deg,#ffcd78,#bc8a40);color:#322147}.portal-admin-open strong{display:block;font-size:21px}.portal-admin-open small{display:block;color:#d7c3a6;font:700 10px Arial;letter-spacing:1.5px;margin-top:6px}.portal-admin-open>b{margin-right:auto;font-size:26px;color:#f5d292}.portal-footer{text-align:center;color:#929dc9;margin-top:37px;font:700 10px Arial;letter-spacing:2px}.portal-error{border:1px solid #f78db6;background:#8b294f;color:#fff;border-radius:14px;padding:13px 19px;margin-bottom:18px}.portal-empty{grid-column:1/-1;text-align:center;padding:46px;border:1px dashed #7984ae;border-radius:20px;color:#ccd4ed}.portal-modal[hidden]{display:none!important}.portal-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:18px}.portal-modal-backdrop{position:absolute;inset:0;background:#030816c9;backdrop-filter:blur(10px)}.portal-modal-panel{position:relative;width:min(100%,480px);background:linear-gradient(145deg,#2c2d65,#171f43);border:1px solid #baa5fc;border-radius:28px;padding:32px;box-shadow:0 40px 100px #000a}.portal-modal-panel h2{font-size:25px;color:#fff}.portal-modal-panel p{color:#c2c9e4}.portal-close{position:absolute;left:20px;top:20px;background:#ffffff14;border:1px solid #ffffff2b;border-radius:12px;padding:8px 12px;color:white;cursor:pointer}.portal-admin-emblem{margin-bottom:17px}.portal-admin-form{display:grid;gap:16px;margin-top:20px}.portal-admin-form label{display:grid;gap:8px;color:#e5eaff;font-weight:700}.portal-admin-form input{width:100%;font:inherit;background:#111936;border:1px solid #7d85bf;border-radius:13px;padding:13px;color:white}.portal-submit{padding:15px;font:inherit;background:linear-gradient(100deg,#805af9,#c76bbd);color:#fff;border:0;border-radius:14px;cursor:pointer;font-weight:800}.faculty-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:17px}.faculty-card{padding:24px;border-radius:22px;background:#242852;border:1px solid #7478ad}.faculty-card h3{margin:15px 0 6px}.faculty-card p{color:#abb9e0}.faculty-card form{display:grid;gap:12px}.faculty-card input{width:100%}@media(max-width:600px){.portal-head{align-items:flex-start}.portal-network{font-size:9px;padding:8px}.portal-intro{padding:40px 0 30px}.portal-intro p{font-size:14px}.portal-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.portal-card-button{padding:14px;border-radius:18px}.portal-avatar{width:58px;height:58px;font-size:26px;border-radius:17px}.portal-card-button strong{font-size:16px}.portal-admin-open{padding:17px}.portal-admin-open strong{font-size:16px}}

/* Aurora next-break countdown banner for every teacher dashboard */
.nexus-next-break{position:relative;overflow:hidden;display:flex;align-items:center;gap:22px;flex-wrap:wrap;padding:22px 27px;margin:0 0 24px;border:1px solid rgba(125,216,255,.28);border-radius:24px;background:linear-gradient(112deg,#153e89 0%,#5836a5 54%,#a63075 100%);box-shadow:0 18px 42px rgba(38,31,114,.23);color:#fff}
.nexus-next-break:before{content:'';position:absolute;inset:-50%;pointer-events:none;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.16),transparent 37%)}
.nexus-next-break.nb-active{background:linear-gradient(115deg,#a51c35,#f24456 55%,#dc7a32)}
.nb-icon{position:relative;font-size:38px;background:rgba(255,255,255,.16);width:68px;height:68px;display:grid;place-items:center;border-radius:21px}
.nb-copy{position:relative;flex:1;min-width:210px}.nb-eyebrow{font-size:11px;letter-spacing:1.6px;color:#ebddff}.nb-copy h2{font-size:clamp(20px,2.8vw,30px);color:#fff;margin:5px 0}.nb-copy p{margin:0;color:#ecddff}
.nb-clock{position:relative;min-width:185px;text-align:center;border:1px solid rgba(255,255,255,.22);background:rgba(0,0,0,.15);padding:14px 19px;border-radius:20px}.nb-clock strong{font-family:inherit;font-size:clamp(26px,3.3vw,42px);letter-spacing:2px;display:block;direction:ltr;font-variant-numeric:tabular-nums;color:white}.nb-clock span{display:block;color:#fff5fc;font-size:13px}
@media(max-width:650px){.nexus-next-break{padding:17px;gap:12px}.nb-icon{width:48px;height:48px;font-size:28px}.nb-clock{width:100%}}

/* NEXUS 9 - teacher break countdown pinned to top header */
.topbar{gap:15px}.top-right{min-width:0;gap:10px}
.header-break{direction:rtl;display:flex;align-items:center;gap:11px;min-width:300px;max-width:490px;padding:8px 12px;border:1px solid #9ec7ff69;border-radius:16px;background:linear-gradient(120deg,#253d9d,#6541a1 60%,#b23d91);box-shadow:0 5px 18px #7956df32;color:white;transition:background .3s}
.header-break.nb-active{background:linear-gradient(120deg,#a91d42,#e44e51,#eb8740)}
.header-break-bell{font-size:22px;flex-shrink:0}.header-break-info{display:grid;gap:2px;min-width:0;flex:1}.header-break-info b{font-size:13px;white-space:nowrap}.header-break-info small{color:#ffeffb;font-size:10px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:180px}
.header-break-time{border-radius:10px;padding:5px 8px;text-align:center;background:#08143454;min-width:115px}.header-break-time strong{display:block;font:800 18px 'NRT',Tahoma,Arial,sans-serif;direction:ltr;font-variant-numeric:tabular-nums;white-space:nowrap}.header-break-time small{font-size:9px;display:block;color:#e8efff;white-space:nowrap}
@media(max-width:1200px){.header-break{min-width:230px;padding:7px}.header-break-info small,.header-break-time small{display:none}.header-break-time{min-width:100px}.header-break-time strong{font-size:16px}.topbar{padding-inline:18px}}
@media(max-width:760px){.topbar{height:auto;min-height:78px;flex-wrap:wrap;gap:7px;padding:10px 12px}.header-break{order:2;min-width:100%;max-width:none;flex:1}.top-right{flex-wrap:wrap;flex:1;justify-content:flex-end}.header-break-info small,.header-break-time small{display:block}.crumb{font-size:10px}.header-break-time strong{font-size:18px}}

/* NEXUS School Bell control */
.bell-enable{font-family:NRT,sans-serif;border:1px solid #9edbff66;border-radius:12px;background:linear-gradient(110deg,#263a7b,#7748b6);color:white;padding:9px 12px;cursor:pointer;font-size:12px;font-weight:800;white-space:nowrap}.bell-enable:hover{filter:brightness(1.2)}.bell-sound-control{padding:16px;margin:15px 0;border:1px solid #ad8dff55;border-radius:18px;background:#51409429}.bell-sound-control h3{margin:0 0 12px}.bell-sound-control p{font-size:12px;color:#d1c9ef}.bell-check{display:flex;align-items:center;gap:10px;justify-content:flex-start}.bell-check input{width:18px;height:18px}.nexus-break-top .bell-enable{background:#ffffff33;border:1px solid #ffffff88;font-size:clamp(12px,1.4vw,20px);padding:12px 18px}@media(max-width:790px){.topbar .bell-enable{font-size:10px;padding:7px}.bell-sound-control{padding:10px}}

/* Rest blackout: intentionally pure black on classroom and teacher screens */
.nexus-break-overlay{background:#000!important;color:#fff!important}
.nexus-break-bloom,.nexus-break-emoji{display:none!important}
.nexus-break-main h1{color:#fff!important;text-shadow:0 0 24px #fff3!important}
.nexus-break-timer{background:#121212!important;border-color:#333!important;box-shadow:none!important}

/* NEXUS CLASSROOM UNIVERSE */
.studio-room-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:17px;margin:16px 0 28px}.studio-room-card{min-height:185px;padding:23px;text-decoration:none;color:#fff;border-radius:24px;display:flex;flex-direction:column;align-items:flex-start;gap:9px;background:linear-gradient(125deg,color-mix(in srgb,var(--grade-a) 35%,#172142),#17203b 80%);border:1px solid color-mix(in srgb,var(--grade-a) 60%,transparent);box-shadow:0 14px 32px #0002;transition:transform .2s,box-shadow .2s}.studio-room-card:hover{transform:translateY(-5px);box-shadow:0 18px 40px #0005}.studio-room-card small{color:#dce5f8;font-size:11px;letter-spacing:.06em}.studio-room-card strong{font-size:25px}.studio-room-icon{font-size:35px}.studio-room-enter{margin-top:auto;color:var(--grade-b);font-weight:800}.studio-wrap{max-width:1320px}.studio-banner{padding:40px;border-radius:30px;background:radial-gradient(circle at 75% 25%,color-mix(in srgb,var(--grade-a) 48%,transparent),transparent 55%),linear-gradient(120deg,#1b2344,#29345b);border:1px solid color-mix(in srgb,var(--grade-a) 60%,transparent);display:flex;align-items:center;justify-content:space-between;gap:20px;overflow:hidden}.studio-banner h1{font-size:clamp(32px,5vw,58px);margin:12px 0;color:white}.studio-banner p{font-size:17px;color:#eef3ff}.studio-overline{color:var(--grade-b);font-size:12px;letter-spacing:.15em;font-weight:900}.studio-chip{display:inline-flex;margin-top:14px;background:#ffffff20;padding:9px 18px;border-radius:30px;color:white}.studio-orb{font-size:86px;filter:drop-shadow(0 12px 35px var(--grade-a))}.studio-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0 34px}.studio-metrics>div{background:#1c2748;border:1px solid #ffffff1c;border-radius:19px;padding:20px}.studio-metrics span{display:block;color:#c0cdeb;font-size:13px}.studio-metrics strong{display:block;font-size:35px;margin-top:8px;color:var(--grade-b)}.studio-heading{margin:26px 0 14px}.studio-heading h2{font-size:24px}.studio-tools{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.studio-tools a{text-decoration:none;padding:23px;background:#202c4b;border:1px solid #ffffff20;border-radius:22px;display:flex;flex-direction:column;gap:10px;color:#fff;transition:.2s}.studio-tools a:hover{transform:translateY(-4px);border-color:var(--grade-a)}.studio-tools a span{font-size:31px}.studio-tools a b{font-size:17px}.studio-tools a small{color:#c2cce0}.studio-lesson{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px;border-bottom:1px solid #ffffff1b}.studio-lesson:last-child{border-bottom:0}.studio-lesson b,.studio-lesson small{display:block}.studio-lesson small{color:#aebdd9;margin-top:7px}.studio-lesson-actions{display:flex;gap:8px}.studio-wrap .btn.primary{background:linear-gradient(115deg,var(--grade-a),var(--grade-b));color:#131c32}@media(max-width:800px){.studio-metrics,.studio-tools{grid-template-columns:repeat(2,1fr)}.studio-banner{padding:25px}.studio-orb{font-size:45px}}@media(max-width:480px){.studio-metrics,.studio-tools{grid-template-columns:1fr}.studio-lesson{align-items:flex-start;flex-direction:column}}

/* Per-class student roster */
.student-roster-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}.student-roster-card{display:flex;align-items:center;gap:12px;padding:14px;border-radius:17px;background:rgba(130,148,255,.10);border:1px solid rgba(184,197,255,.17)}.student-roster-card b{display:block;font-size:14px}.student-roster-card small{display:block;opacity:.7;margin-top:4px}.student-roster-avatar{display:grid;place-items:center;min-width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,#60e2db,#a476f9);color:#10203b;font-size:19px;font-weight:800}

/* Teacher-first navigation: full-width, no sidebar; administration layout unchanged */
body.teacher-portal .sidebar{display:none!important}
body.teacher-portal .main{width:100%;min-width:0;flex:1}
body.teacher-portal .content{max-width:1780px;width:100%;margin:0 auto;padding:32px clamp(16px,3vw,56px)}
body.teacher-portal .topbar{padding-inline:clamp(15px,3vw,50px)}
body.teacher-portal .mobile-menu{display:none!important}
.teacher-back{display:inline-flex;padding:9px 14px;background:#4541a45e;border:1px solid #a7a5ff66;border-radius:11px;color:#eff1ff;font-weight:bold}
.teacher-back:hover{background:#6051ba}
.teacher-steps{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.teacher-steps>*{border-radius:999px;padding:11px 19px;background:#202946;border:1px solid #3b4774;color:#c4ccec;font-size:13px;font-weight:800}
.teacher-steps>.done{background:#14685350;border-color:#53dcaa88;color:#b2ffde}
.teacher-steps>.active{background:linear-gradient(105deg,#514bc0,#a34fc1);border-color:#c38cfd;color:#fff;box-shadow:0 8px 24px #8c50d544}
.teacher-select-banner{border-radius:28px;padding:clamp(25px,4vw,52px);border:1px solid #8987f877;background:radial-gradient(circle at 4% 10%,#ba53d650,transparent 42%),linear-gradient(120deg,#2c3473,#132c55 58%,#1a2040);box-shadow:0 16px 50px #03091d66}
.teacher-select-banner h1{font-size:clamp(27px,3.7vw,48px);margin:17px 0}
.teacher-select-banner p{color:#d4ddf8;font-size:clamp(13px,1.3vw,17px);line-height:2}
.teacher-class-picker{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:18px 0 45px}
.teacher-class-choice{--class-color:#8fc7ff;position:relative;display:flex;flex-direction:column;min-height:250px;gap:12px;border:1px solid color-mix(in srgb,var(--class-color),transparent 35%);border-top:5px solid var(--class-color);border-radius:25px;padding:25px;background:radial-gradient(circle at 95% 0%,color-mix(in srgb,var(--class-color),transparent 78%),transparent 70%),linear-gradient(145deg,#202946,#121b37);transition:transform .2s,box-shadow .2s}
.teacher-class-choice:hover{transform:translateY(-6px);box-shadow:0 20px 42px #0008}
.teacher-class-emoji{font-size:38px}.teacher-class-number{font-size:15px;color:var(--class-color);font-weight:900}
.teacher-class-choice strong{font-size:26px;color:#fff}.teacher-class-choice small{font-size:12px;color:#cad4ee}
.teacher-class-go{margin-top:auto;font-size:14px;color:var(--class-color);font-weight:900}
@media(max-width:950px){.teacher-class-picker{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:550px){.teacher-class-picker{grid-template-columns:1fr}.teacher-class-choice{min-height:200px}.teacher-steps>*{font-size:11px;padding:9px 12px}}

/* Classroom context back navigation */
.nexus-studio-return{display:flex;justify-content:flex-start;margin:0 0 20px}
.nexus-studio-return a{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(120deg,#795bff,#c34ee3);border:1px solid #c7a6ff88;color:white;padding:12px 20px;border-radius:16px;font-weight:800;text-decoration:none;box-shadow:0 8px 22px #6e53ec30}
.nexus-studio-return a:hover{filter:brightness(1.13)}


/* NEXUS 9 / Admin Nova Sidebar. Isolated from teacher UI. */
body.admin-portal .nexus-admin-sidebar{width:300px;flex:0 0 300px;height:100dvh;min-height:0;position:sticky;top:0;display:flex;flex-direction:column;padding:0!important;overflow:hidden;background:linear-gradient(165deg,#20224e 0%,#121c3e 51%,#0b1e37 100%)!important;border-left:1px solid #7267e866;box-shadow:-15px 0 60px #0208197a;z-index:50}
.nx-side-head{padding:18px 17px 11px;flex:0 0 auto}.nx-side-head .nx-brand{margin:0!important;padding:15px!important;min-height:78px;border:1px solid #ffffff22;border-radius:19px;background:linear-gradient(135deg,#584ac749,#16bbcf1d)!important;justify-content:center;gap:15px;box-shadow:0 10px 28px #08071d2f}.nx-brand .brand-mark{font-size:47px!important;color:#ffc982!important;background:none!important;-webkit-text-fill-color:#ffc982;animation:none!important}.nx-brand b{color:#fff;font-family:'Segoe UI',sans-serif;font-size:25px;white-space:nowrap}.nx-brand em{color:#ff90d6!important}.nx-brand small{font-size:8px;color:#b5c4ff!important;letter-spacing:2px}.nx-side-close{display:none}
.nx-profile{margin:7px 17px 18px;display:flex;align-items:center;gap:12px;background:#ffffff0a;border:1px solid #ffffff16;border-radius:16px;padding:13px 12px;min-height:69px}.nx-profile-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:22px;background:linear-gradient(130deg,#8955f5,#e65db5)}.nx-profile div{display:grid;gap:4px;min-width:0;flex:1}.nx-profile strong{font-size:14px;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nx-profile small{color:#afbde8;font-size:10px}.nx-profile-dot{width:8px;height:8px;background:#4ee0b3;box-shadow:0 0 12px #4ee0b3;border-radius:50%}
.nx-side-scroll{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding:0 12px 25px;scrollbar-width:thin;scrollbar-color:#8469dd #161d41;overscroll-behavior:contain}.nx-side-scroll::-webkit-scrollbar{width:7px}.nx-side-scroll::-webkit-scrollbar-track{background:#161d41;border-radius:12px}.nx-side-scroll::-webkit-scrollbar-thumb{background:linear-gradient(#9b71ff,#4dc7db);border-radius:12px}.nx-nav-intro{display:flex;justify-content:space-between;align-items:center;margin:0 10px 16px;color:#d2dcff;font-size:12px;font-weight:850}.nx-nav-intro span{color:#f9bb7e}.nx-nav-group{margin-bottom:24px}.nx-group-title{color:#8ea1d6;font-size:10px;letter-spacing:.35px;font-weight:850;margin:0 12px 10px;display:flex;align-items:center;gap:9px}.nx-group-title span{color:#ab8cff;font-size:18px}.nx-group-links{display:flex!important;flex-direction:column;gap:5px!important}.nx-nav-link{display:flex!important;gap:12px;min-height:49px;padding:9px 11px!important;border:1px solid transparent!important;border-radius:13px!important;color:#c5d0ec!important;background:transparent!important;box-shadow:none!important;transform:none!important;text-align:right;font-size:12.5px!important;transition:background .18s, border-color .18s,transform .18s}.nx-nav-link:hover{background:#ffffff13!important;border-color:#ffffff20!important;transform:translateX(-3px)!important;color:white!important}.nx-nav-link.selected{background:linear-gradient(110deg,#7960ec67,#4bc6cc24)!important;border-color:#a895ff88!important;box-shadow:inset -3px 0 #fa9ad9,0 9px 20px #03061c55!important;color:#fff!important}.nx-nav-link .nav-ico{width:35px;height:35px;min-width:35px;border-radius:11px!important;background:#ffffff0d!important;border:1px solid #ffffff18;color:#90e8e6;font-size:18px}.nx-nav-group:nth-of-type(2) .nav-ico{color:#f7c17a}.nx-nav-group:nth-of-type(3) .nav-ico{color:#f39dcf}.nx-nav-group:nth-of-type(4) .nav-ico{color:#9beaaa}.nx-nav-link.selected .nav-ico{background:#9b87ef50!important;color:#fff}.nx-link-title{flex:1;line-height:1.45;font-weight:750}.nx-link-arrow{color:#7386b6;font-size:23px;line-height:1}.nx-side-footer{flex:0 0 auto;padding:14px 17px 18px;background:#0b1530e6;border-top:1px solid #ffffff17}.nx-network{display:flex;gap:9px;align-items:center;color:#b5c3e2;font-size:10px}.nx-network b{margin-inline-start:auto;font-family:Arial,sans-serif;font-size:9px;color:#62e6b1}.nx-footer-caption{direction:ltr;text-align:center;color:#7485ad;margin-top:10px;font:9px Arial,sans-serif;letter-spacing:1px}.nx-sidebar-scrim{display:none}
@media(max-width:1200px){body.admin-portal .nexus-admin-sidebar{width:275px;flex-basis:275px}}
@media(max-width:900px){body.admin-portal .nexus-admin-sidebar{position:fixed;right:-330px;top:0;height:100dvh;width:300px;flex-basis:auto;transition:right .22s ease}body.admin-portal .nexus-admin-sidebar.open{right:0}.nx-side-close{position:absolute;display:grid;place-items:center;top:28px;left:26px;background:#ffffff14;color:#fff;border:1px solid #ffffff2b;border-radius:9px;width:32px;height:32px;z-index:2}.nx-sidebar-scrim{display:none;position:fixed;inset:0;background:#020617a8;border:0;z-index:45}body.admin-portal .nexus-admin-sidebar.open + .nx-sidebar-scrim{display:block}}
@media print{body.admin-portal .nexus-admin-sidebar,.nx-sidebar-scrim{display:none!important}}

/* NEXUS 9: Admin sidebar compact-scroll edition */
body.admin-portal .nexus-admin-sidebar{width:282px!important;flex-basis:282px!important}
body.admin-portal .nx-side-head{padding:14px 13px 8px!important}
body.admin-portal .nx-brand{min-height:66px!important;padding:10px!important}
body.admin-portal .nx-brand .brand-mark{font-size:36px!important}
body.admin-portal .nx-brand b{font-size:21px!important}
body.admin-portal .nx-profile{margin:4px 13px 11px!important;padding:11px!important}
body.admin-portal .nx-side-scroll{padding:0 11px 16px!important;scrollbar-width:thin;scrollbar-color:#7061ac transparent}
body.admin-portal .nx-side-scroll::-webkit-scrollbar{width:4px}
body.admin-portal .nx-side-scroll::-webkit-scrollbar-track{background:transparent}
body.admin-portal .nx-side-scroll::-webkit-scrollbar-thumb{background:#7061ac;border-radius:30px}
body.admin-portal .nx-nav-intro{margin:8px 9px 10px!important}
body.admin-portal details.nx-nav-group{display:block;margin:0 0 5px;padding:3px 0;border-bottom:1px solid #ffffff0c}
body.admin-portal summary.nx-group-title{list-style:none;display:flex;gap:8px;align-items:center;cursor:pointer;margin:0!important;padding:10px 12px!important;border-radius:11px;color:#c6d1f5;font-size:12px;letter-spacing:0;user-select:none;transition:background .18s}
body.admin-portal summary.nx-group-title::-webkit-details-marker{display:none}
body.admin-portal summary.nx-group-title:hover{background:#ffffff0f}
body.admin-portal summary.nx-group-title i{font-style:normal;margin-inline-start:auto;color:#a6b5e5;transition:transform .2s}
body.admin-portal details[open] summary.nx-group-title i{transform:rotate(180deg)}
body.admin-portal .nx-group-links{padding:3px 0 8px;gap:3px!important}
body.admin-portal .nx-nav-link{min-height:43px!important;padding:5px 9px!important;gap:9px!important;font-size:12px!important}
body.admin-portal .nx-nav-link .nav-ico{height:29px;width:29px;min-width:29px;font-size:15px}
body.admin-portal .nx-link-arrow{font-size:16px}
body.admin-portal .nx-side-footer{padding:10px 13px!important}
@media(max-width:900px){body.admin-portal .nexus-admin-sidebar{position:fixed!important;right:-310px!important;width:282px!important;flex-basis:auto!important}body.admin-portal .nexus-admin-sidebar.open{right:0!important}}

/* NEXUS 9 Whiteboard: editable background and real eraser */
.canvas-wrap canvas{background-color:#0b1424;touch-action:none}
.wb-tools .wb-bg-label{display:flex;align-items:center;gap:9px}
.wb-tools select{border-radius:10px;padding:9px 12px;background:#182749;border:1px solid #7a89bf;color:#fff;min-height:42px}
.wb-tools input[type=color]{width:48px;height:42px;padding:3px;border-radius:10px;background:#182749;border:1px solid #7a89bf;cursor:pointer}
.wb-tools #erase.active{background:#f8b6db!important;color:#17203d!important;border-color:#ffb5dd!important}
@media(max-width:650px){.canvas-wrap{height:calc(100dvh - 240px);min-height:300px}.wb-tools{gap:8px}.wb-tools label{font-size:11px}}

/* User-selected marker ink, distinct from the board background picker. */
.wb-tools .wb-marker-picker{display:inline-flex;align-items:center;gap:9px;padding:5px 10px;border:1px solid #566b9b;border-radius:12px;background:#1a2d57;color:#f2f6ff;white-space:nowrap}
.wb-tools .wb-marker-picker:focus-within{outline:2px solid #6ad9ee;outline-offset:2px}
.wb-tools .wb-marker-picker input[type=color]{width:50px;min-width:50px;height:42px;cursor:pointer}

/* NEXUS 9 - OMEED SIGNATURE DESIGN / presentation layer only */
:root{--bg:#090f22;--panel:#151f39;--panel2:#202b49;--line:#42547b;--muted:#b4c1df;--cyan:#65e4e5;--gold:#f7c980;--blue:#7f9cff}
body{background:radial-gradient(ellipse 78% 45% at 94% 0%,#253f7259 0%,transparent 70%),radial-gradient(ellipse 46% 40% at 8% 65%,#643e7030 0%,transparent 80%),#090f22;color:#f3f6ff}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.11;background-image:linear-gradient(#8bbdff20 1px,transparent 1px),linear-gradient(90deg,#8bbdff20 1px,transparent 1px);background-size:65px 65px;z-index:0}
.app,.portal-wrap,.whiteboard-body{position:relative}.main{isolation:isolate}
.topbar{background:linear-gradient(115deg,#151d3eec,#0b1834e8);border-bottom:1px solid #95a3e140;box-shadow:0 8px 35px #040b2459;backdrop-filter:blur(18px);position:relative;z-index:5}
.page-heading{padding:10px 0 12px;position:relative}.page-heading h1{font-weight:900;letter-spacing:-1px}.eyebrow{letter-spacing:2.1px;color:#89e9ed!important}.page-symbol{filter:drop-shadow(0 0 18px #9c72fb)}
.hero{border-radius:28px!important;border:1px solid #a7b2ff78!important;box-shadow:0 30px 65px #050a2680, inset 0 1px #ffffff51;overflow:hidden}.hero:after{content:"";position:absolute;inset:1px;pointer-events:none;border:1px solid #ffffff13;border-radius:inherit}
.stat,.panel,.room,.board-card,.deck-action{box-shadow:0 16px 38px #04091e65,inset 0 1px #ffffff14!important;backdrop-filter:blur(10px);border-color:#7485b866!important}
.stat:hover,.deck-action:hover{transform:translateY(-3px);border-color:#a7deed!important;transition:transform .22s,border-color .22s}
.stat strong{font-variant-numeric:tabular-nums}.btn,.teacher-class-choice,.portal-teacher-card{transition:transform .2s ease,box-shadow .2s ease,filter .2s ease}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid #7deadd;outline-offset:3px}
.btn.primary{background:linear-gradient(115deg,#30bfc9,#578eea 54%,#8c72eb)!important;border-color:#9ceafa!important;color:#fff;box-shadow:0 10px 26px #3da6cf4b!important}
.nx-command-banner{position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(230px,.85fr) minmax(390px,1.6fr);gap:24px;align-items:center;padding:24px 26px;margin:14px 0 28px;border-radius:24px;background:radial-gradient(circle at 92% -30%,#9a77d74d,transparent 45%),linear-gradient(115deg,#15244b,#12243e 70%,#1e3155);border:1px solid #8b9fd67d;box-shadow:0 18px 40px #0006}
.nx-command-kicker{font:700 10px 'Segoe UI',sans-serif;letter-spacing:2px;color:#72e9e6}.nx-command-copy h2{font-size:clamp(19px,2vw,26px);margin:10px 0;color:#fff}.nx-command-copy p{font-size:12px;line-height:1.9;color:#c0cceb;margin:0}
.nx-command-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.nx-command-actions a{display:flex;flex-direction:column;gap:7px;align-items:flex-start;min-height:128px;padding:14px;border:1px solid #aabaff41;border-radius:18px;background:#ffffff0a;transition:transform .2s,background .2s,border-color .2s}.nx-command-actions a:hover{background:#89eaff16;border-color:#80e5f2;transform:translateY(-4px)}.nx-command-actions a>span{display:grid;place-items:center;font-size:21px;width:39px;height:39px;border-radius:12px;background:linear-gradient(145deg,#348aae80,#6c59aa70);color:#aeffff}.nx-command-actions b{font-size:12px;color:#fff}.nx-command-actions small{font-size:10px;color:#b8c7ec}
.footer{direction:rtl;display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:space-between;background:#101a32dd;border-top:1px solid #768ab64a;padding:16px 35px;letter-spacing:0;min-height:66px}.nx-footer-brand{display:inline-flex;align-items:center;gap:8px;font:bold 14px 'Segoe UI',sans-serif;color:#a5f0f3;direction:ltr}.nx-footer-brand small{font-size:9px;letter-spacing:.8px}.nx-footer-device{font:9px 'Segoe UI',sans-serif;letter-spacing:1.2px;color:#8da0c9;direction:ltr}.nx-creator-credit{font-size:12px;color:#c4d3ef;direction:rtl;letter-spacing:0}.nx-creator-credit strong{color:#f7d28e;font-weight:900;font-size:13px}.nx-creator-mini{text-align:center;margin:11px 0 0;font-weight:700;color:#f6d097;font-size:11px;border-top:1px solid #ffffff17;padding-top:10px}
.portal-footer{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}.portal-footer .nx-creator-credit{letter-spacing:0}
.wb-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;padding-inline:18px;min-height:34px}.wb-footer .nx-creator-credit{font-size:11px}
body.admin-portal .nx-side-head .nx-brand{box-shadow:inset 0 1px #ffffff30,0 14px 35px #06072270!important;background:linear-gradient(130deg,#584d9f,#25396b 58%,#176c78)!important}
body.admin-portal .nx-nav-link.selected{background:linear-gradient(110deg,#6656ba,#2b6082)!important;border-color:#8fe1e9!important;box-shadow:inset -3px 0 #f6cd87,0 9px 19px #050d2b8a!important}
@media(max-width:1050px){.nx-command-banner{grid-template-columns:1fr}.nx-command-actions{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:660px){.nx-command-banner{padding:18px}.nx-command-actions{grid-template-columns:1fr}.nx-command-actions a{min-height:78px}.content{padding:20px 15px}.footer{justify-content:center;text-align:center}.wb-footer{justify-content:center}}
@media(prefers-reduced-motion:reduce){.btn,.stat,.deck-action,.room,.nx-command-actions a{transition:none!important}}
@media print{body:before,.nx-command-banner{display:none!important}.footer{color:#111!important}}

/* Next bell: isolated RTL labels and LTR numerals */
.header-break-time{min-width:205px;max-width:100%;flex-shrink:0}
.header-break-time strong#nb-count{font-size:inherit;direction:rtl;white-space:normal}
.nb-units{display:flex;align-items:center;justify-content:center;gap:5px;flex-wrap:nowrap}
.nb-unit{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;min-width:32px;padding:2px 3px;border-radius:7px;background:#ffffff12}
.nb-unit b{font-size:16px;line-height:1.2;font-weight:900;font-variant-numeric:tabular-nums;unicode-bidi:isolate}
.nb-unit small{display:block!important;font-size:9px;line-height:1.3;color:#f2eaff;white-space:nowrap}
@media(max-width:1200px){.header-break-time{min-width:180px}.nb-unit{min-width:28px}.nb-unit b{font-size:14px}}
@media(max-width:760px){.header-break-time{min-width:190px}.nb-unit b{font-size:16px}}