:root {
  --ink:#172219; --muted:#667267; --paper:#fbfaf5; --card:#ffffff;
  --green:#274c35; --green2:#3c6b4b; --gold:#a98342; --line:#dfe5dc;
  --danger:#9d2d2d; --warn:#9a651c; --ok:#2d6a44; --shadow:0 14px 40px rgba(32,54,38,.10);
}
*{box-sizing:border-box} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial;color:var(--ink);background:linear-gradient(180deg,#f4f1e8,#fbfaf5 38%,#f6f8f4);min-height:100vh}
a{color:var(--green2)} button,input,select,textarea{font:inherit}
.shell{max-width:1180px;margin:auto;padding:24px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:22px}.brand{display:flex;align-items:center;gap:14px}.seal{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 35% 30%,#d5bd82,#9a7432);border:3px solid #fff;box-shadow:0 0 0 1px #b6934e;font-family:Georgia,serif;font-weight:800;color:#fff;font-size:20px}.brand h1{font-size:20px;margin:0}.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;padding:7px 11px;background:#fff;color:var(--muted);font-size:12px}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:1.05fr .95fr}.grid.three{grid-template-columns:repeat(3,1fr)}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow)}.hero{padding:36px}.hero h2{font-family:Georgia,serif;font-size:42px;line-height:1.03;margin:10px 0 14px;max-width:720px}.hero p{color:var(--muted);font-size:17px;line-height:1.6;max-width:720px}.eyebrow{letter-spacing:.14em;text-transform:uppercase;font-size:11px;color:var(--gold);font-weight:800}.feature{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fcfcf9}.feature strong{display:block;margin-bottom:6px}.feature span{font-size:13px;color:var(--muted)}
.tabs{display:flex;background:#eef2ec;border-radius:12px;padding:4px;margin-bottom:18px}.tabs button{flex:1;border:0;background:transparent;padding:10px;border-radius:9px;cursor:pointer}.tabs button.active{background:#fff;box-shadow:0 2px 9px rgba(0,0,0,.06);font-weight:700}.field{display:grid;gap:7px;margin-bottom:14px}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid #ccd5ca;border-radius:11px;padding:11px 12px;background:#fff;color:var(--ink);outline:none}.field textarea{min-height:90px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:#73937c;box-shadow:0 0 0 3px rgba(39,76,53,.08)}.row{display:flex;gap:10px;align-items:center}.row.wrap{flex-wrap:wrap}.btn{border:0;border-radius:11px;padding:11px 15px;font-weight:750;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn.primary{background:var(--green);color:#fff}.btn.secondary{background:#eef2ec;color:var(--green)}.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}.btn.danger{background:#f8eaea;color:var(--danger)}.btn:disabled{opacity:.5;cursor:not-allowed}.muted{color:var(--muted)}.small{font-size:12px}.hidden{display:none!important}.message{padding:12px 14px;border-radius:12px;margin:12px 0;font-size:13px}.message.error{background:#fae9e7;color:#8c2a24}.message.success{background:#eaf5ed;color:#235c39}.message.info{background:#edf2f6;color:#37556a}.message.warn{background:#fff4dd;color:#77511c}.section-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.section-title h2,.section-title h3{margin:0}.stat{padding:18px}.stat .number{font-size:30px;font-weight:850}.stat .label{font-size:12px;color:var(--muted);margin-top:2px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;min-width:720px}th,td{text-align:left;padding:11px 12px;border-bottom:1px solid #edf0eb;font-size:13px;vertical-align:top}th{background:#f7f8f5;color:#5d695f;font-size:11px;text-transform:uppercase;letter-spacing:.05em}.pill{display:inline-flex;border-radius:999px;padding:4px 8px;background:#edf3ed;color:#2f5c3e;font-size:11px;font-weight:700}.pill.warn{background:#fff2dc;color:#855b21}.pill.closed{background:#eee;color:#666}.list{display:grid;gap:10px}.item{border:1px solid var(--line);border-radius:14px;padding:14px}.item h4{margin:0 0 6px}.item p{margin:0;color:var(--muted);font-size:13px}.copybox{display:flex;gap:8px}.copybox input{flex:1}.divider{height:1px;background:var(--line);margin:18px 0}.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px}.exam-question{padding:24px}.exam-question h2{font-size:19px;line-height:1.45}.choice{display:flex;gap:10px;padding:12px;border:1px solid var(--line);border-radius:12px;margin:9px 0;cursor:pointer}.choice:has(input:checked){border-color:#63816b;background:#f0f6f1}.navgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.qnav{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px;cursor:pointer}.qnav.answered{background:#e8f3eb;border-color:#aac9b1}.qnav.current{outline:2px solid #6d8b75}.camera{width:100%;aspect-ratio:16/9;background:#121612;border-radius:14px;overflow:hidden;position:relative}.camera video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.camera .status{position:absolute;left:8px;bottom:8px;background:rgba(0,0,0,.65);color:#fff;border-radius:999px;padding:5px 8px;font-size:11px}.timer{font-size:25px;font-weight:850;font-variant-numeric:tabular-nums}.sticky{position:sticky;top:16px}.footer{padding:30px 0;color:var(--muted);font-size:12px;text-align:center}
@media(max-width:850px){.grid.two,.grid.three,.exam-layout{grid-template-columns:1fr}.hero h2{font-size:34px}.sticky{position:static}.shell{padding:14px}.topbar{align-items:flex-start}.brand p{display:none}}
.grid.four{grid-template-columns:repeat(4,1fr)}
.quick-nav{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px;padding:14px 18px}.quick-nav a{text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:7px 11px;background:#fff;color:var(--green);font-size:12px;font-weight:700}
.teacher-workspace{display:grid;gap:18px}.accordion{padding:0;overflow:hidden}.accordion>summary{cursor:pointer;list-style:none;padding:19px 22px;display:flex;align-items:center;justify-content:space-between;background:#fff}.accordion>summary::-webkit-details-marker{display:none}.accordion>summary:after{content:'▾';font-size:18px;color:var(--muted);transition:.2s}.accordion:not([open])>summary:after{transform:rotate(-90deg)}.accordion>summary span{display:grid;gap:3px}.accordion>summary small{font-weight:400;color:var(--muted)}.accordion-body{padding:0 22px 22px;border-top:1px solid var(--line);padding-top:20px}
.student-dashboard-grid{display:grid;grid-template-columns:250px minmax(0,1fr);gap:18px}.student-sidebar{align-self:start;position:sticky;top:16px}.menu-drop{border-top:1px solid var(--line);padding:10px 0}.menu-drop summary{cursor:pointer;font-weight:750}.menu-drop a,.menu-drop span{display:block;padding:8px 4px 2px;color:var(--muted);text-decoration:none;font-size:13px}.exam-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.exam-card{border:1px solid var(--line);border-radius:16px;padding:17px;background:#fff}.exam-card h3{margin:8px 0 4px}.exam-card p{margin:0}.exam-card-meta{display:grid;gap:4px;margin:14px 0;color:var(--muted);font-size:12px}.empty-state{border:1px dashed #cbd5ca;border-radius:16px;padding:30px;text-align:center;display:grid;gap:8px;color:var(--muted)}.empty-state strong{color:var(--ink)}
.pill.open{background:#e7f5eb;color:#1f653b}.pill.in_progress{background:#e8f0fb;color:#315f99}.pill.upcoming{background:#fff2dc;color:#855b21}.pill.submitted{background:#edf0ed;color:#4a554c}.pill.closed{background:#f0eeee;color:#6d5d5d}
.watermark-layer{position:fixed;inset:0;z-index:60;pointer-events:none;display:grid;grid-template-columns:repeat(3,1fr);align-content:space-around;justify-items:center;opacity:.09;transform:rotate(-18deg);overflow:hidden}.watermark-layer span{font-weight:800;font-size:15px;white-space:nowrap;color:#172219}
.screen-lock{position:fixed;inset:0;z-index:100;background:rgba(13,18,14,.93);display:grid;place-items:center;padding:24px}.screen-lock-card{max-width:520px;background:#fff;border-radius:20px;padding:28px;text-align:center;box-shadow:var(--shadow)}.screen-lock-card .seal{margin:0 auto 16px}.screen-lock-card h2{margin:8px 0}.screen-lock-card p{color:var(--muted);line-height:1.5}
@media print{body *{visibility:hidden!important}.printing-blocked:before,body:before{content:'Printing and screen export are disabled during this exam.';visibility:visible!important;position:fixed;inset:0;display:grid;place-items:center;font-size:22px;font-weight:800;background:white;color:#222}}
@media(max-width:1000px){.grid.four{grid-template-columns:repeat(2,1fr)}.student-dashboard-grid{grid-template-columns:1fr}.student-sidebar{position:static}.exam-cards{grid-template-columns:1fr}}
@media(max-width:650px){.grid.four{grid-template-columns:1fr}.quick-nav{align-items:stretch}.quick-nav a{flex:1;text-align:center}.exam-cards{grid-template-columns:1fr}.watermark-layer{grid-template-columns:repeat(2,1fr)}.topbar{flex-wrap:wrap}}

/* Prototype 05.3 classroom dashboard */
.top-actions{flex-wrap:wrap;justify-content:flex-end}.notification-menu{position:relative}.notification-menu>summary{list-style:none}.notification-menu>summary::-webkit-details-marker{display:none}.notif-badge{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border-radius:999px;background:var(--danger);color:#fff;font-size:11px}.notification-panel{position:absolute;right:0;top:48px;width:min(390px,88vw);background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px;box-shadow:0 18px 50px rgba(20,32,22,.18);z-index:30}.notification-list{display:grid;gap:8px;max-height:360px;overflow:auto}.notification-item{display:grid;grid-template-columns:10px 1fr;gap:9px;align-items:start;padding:10px;border-radius:11px;background:#f7f9f6;font-size:13px}.notification-dot{width:8px;height:8px;border-radius:50%;background:#839487;margin-top:5px}.notification-item.live .notification-dot{background:#2f7a4a}.notification-item.flag .notification-dot{background:#b87920}.notification-item.done .notification-dot{background:#5e76a6}.notification-item.new .notification-dot{background:#8a68a7}.btn.compact{padding:7px 9px;font-size:11px}.roster-filters{align-items:end}.class-summary{display:flex;gap:9px;overflow:auto;padding:2px 0 14px;margin-bottom:2px}.class-chip{min-width:210px;border:1px solid var(--line);border-radius:14px;padding:12px;background:#fbfcf9}.class-chip strong,.class-chip span{display:block}.class-chip span{font-size:12px;color:var(--muted);margin-top:4px}
@media(max-width:650px){.notification-panel{position:fixed;left:12px;right:12px;top:82px;width:auto}.top-actions{width:100%;justify-content:space-between}.camera{aspect-ratio:4/3}.exam-question{padding:17px}}

/* Prototype 06 classroom community */
.mini-badge{display:inline-grid;place-items:center;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:#e7eee8;color:var(--green);font-size:10px;font-weight:800;margin-left:4px}.toggle-row{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:14px;padding:14px;background:#fbfcfa}.toggle-row input{margin-top:4px;transform:scale(1.15)}.toggle-row span{display:grid;gap:4px}.toggle-row small{color:var(--muted);line-height:1.4}.discussion-compose{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:end;margin-bottom:18px}.discussion-compose textarea{min-height:78px;border:1px solid #ccd5ca;border-radius:12px;padding:11px 12px;resize:vertical}.discussion-feed{display:grid;gap:12px}.discussion-post{border:1px solid var(--line);border-radius:16px;padding:16px;background:#fff}.discussion-post.announcement{border-left:5px solid var(--gold);background:#fffdf8}.post-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.post-meta{display:flex;gap:7px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:11px}.post-body{white-space:pre-wrap;line-height:1.55;margin:12px 0}.comment-list{display:grid;gap:8px;margin-top:12px}.comment{background:#f7f9f6;border-radius:11px;padding:10px 12px}.comment .comment-body{white-space:pre-wrap;margin-top:4px;line-height:1.45}.comment-compose{display:flex;gap:8px;margin-top:10px}.comment-compose input{flex:1;border:1px solid #ccd5ca;border-radius:10px;padding:9px 10px}.message-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:16px;min-height:430px}.contact-list{display:grid;gap:7px;max-height:520px;overflow:auto}.contact-btn{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:12px;padding:11px;cursor:pointer;display:grid;gap:3px}.contact-btn:hover,.contact-btn.active{border-color:#7d9a84;background:#f2f7f3}.contact-btn strong{font-size:13px}.contact-btn span{font-size:11px;color:var(--muted)}.conversation-panel{border:1px solid var(--line);border-radius:15px;overflow:hidden;display:grid;grid-template-rows:auto minmax(280px,1fr) auto;background:#fcfdfa}.conversation-header{padding:13px 15px;border-bottom:1px solid var(--line);background:#f7f9f6;display:flex;justify-content:space-between;gap:8px;align-items:center}.conversation{padding:15px;overflow:auto;display:flex;flex-direction:column;gap:9px;max-height:520px}.bubble{max-width:min(76%,620px);padding:10px 12px;border-radius:14px;background:#edf1ed;align-self:flex-start}.bubble.mine{background:#dfeee3;align-self:flex-end}.bubble .bubble-body{white-space:pre-wrap;line-height:1.45}.bubble .bubble-time{font-size:10px;color:var(--muted);margin-top:5px}.message-compose{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;padding:12px;border-top:1px solid var(--line);background:#fff}.message-compose textarea{min-height:58px;max-height:150px;resize:vertical;border:1px solid #ccd5ca;border-radius:11px;padding:10px}.student-status{display:inline-flex;align-items:center;gap:6px}.student-status:before{content:'';width:8px;height:8px;border-radius:50%;background:#2f7a4a}.student-status.inactive:before{background:#9a8f8f}.account-actions{display:flex;gap:6px;flex-wrap:wrap}
@media(max-width:850px){.message-layout{grid-template-columns:1fr}.contact-list{max-height:240px}.discussion-compose,.message-compose{grid-template-columns:1fr}.bubble{max-width:88%}}

/* Prototype 06.1 password recovery */
.auth-links{margin-top:10px;text-align:right}.auth-links a{font-weight:700;text-decoration:none;color:#25583b}.auth-links a:hover{text-decoration:underline}.recovery-card{max-width:560px;margin:52px auto}.recovery-actions{display:flex;gap:10px;flex-wrap:wrap}.recovery-actions .btn{flex:1;min-width:180px}