:root{font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#15263b;background:#f4f7fb;--ink:#15263b;--muted:#5b6879;--surface:#fff;--accent:#145d94;--line:#dce5ef;--bg:#f4f7fb;--soft:#eaf2f9;--warn:#9e4b12}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg)}body.dark{--ink:#e4ebf7;--muted:#afc0d2;--surface:#172437;--accent:#84c8fc;--line:#36475a;--bg:#0b1421;--soft:#213750;--warn:#ffb77d;color:var(--ink)}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0}button:disabled{opacity:.5;cursor:not-allowed}a{color:var(--accent)}.shell{max-width:1440px;margin:auto;padding:24px 28px 90px;display:grid;grid-template-columns:218px minmax(0,1fr);gap:30px}.sidebar{position:sticky;top:24px;height:max-content;background:var(--surface);border:1px solid var(--line);padding:16px;border-radius:19px}.brand{font-size:20px;font-weight:850;display:flex;align-items:center;gap:10px;margin-bottom:24px}.logo{display:grid;place-items:center;width:40px;height:40px;background:#123456;color:#fff;border-radius:12px}.nav{display:grid;gap:7px}.nav button{padding:12px;text-align:left;border-radius:11px;color:var(--muted);background:transparent;font-weight:650}.nav button.active{background:var(--soft);color:var(--accent)}.content{min-width:0}.top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:23px}.top h1{margin:0;font-size:clamp(25px,3vw,34px);letter-spacing:-.6px}.top p{margin:3px 0 0;color:var(--muted)}.offline{border-radius:999px;padding:7px 12px;font-size:12px;background:var(--soft);color:var(--accent);font-weight:700}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:21px;min-width:0;margin-bottom:16px}.card h2,.card h3{margin:0 0 12px;font-size:18px}.card h2{font-size:20px}.hero{background:#123455;color:#fff;border:0}.hero .sub{color:#c9dff0}.kpi{font-size:28px;font-weight:850;line-height:1.2}.sub,.muted{color:var(--muted)}.hero .muted{color:#c9dff0}.tag{display:inline-block;border-radius:6px;background:var(--soft);color:var(--accent);font-size:12px;padding:3px 8px;font-weight:700}.warn{color:var(--warn)}.error{color:#c63d36}.success{color:#238565}.actions{display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin:13px 0}.btn{background:var(--accent);color:#fff;border-radius:10px;padding:10px 16px;font-weight:700}.dark .btn{color:#091525}.btn.secondary{background:var(--soft);color:var(--accent)}.btn.danger{background:#a82a31}.btn.tiny{font-size:12px;padding:5px 9px}.pill{padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink)}.pill.active{background:var(--accent);color:#fff}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.field{display:flex;flex-direction:column;gap:5px;font-size:13px;font-weight:650;color:var(--muted);min-width:0}.field input,.field select,.field textarea{width:100%;padding:10px 12px;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:9px;min-width:0}.field textarea{min-height:70px}.full{grid-column:1/-1}.list{display:grid;gap:8px}.item{border:1px solid var(--line);padding:13px 15px;border-radius:12px;display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}.item strong{font-size:15px}.item small{display:block;color:var(--muted)}.empty{border:1px dashed var(--line);border-radius:14px;padding:28px;text-align:center;color:var(--muted)}.scroll{overflow:auto;max-width:100%}table{border-collapse:collapse;width:100%;font-size:13px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:10px;vertical-align:top}th{color:var(--muted)}.week{display:grid;grid-template-columns:repeat(7,minmax(135px,1fr));gap:10px;min-width:985px}.day{border:1px solid var(--line);border-radius:13px;padding:10px;min-height:170px}.day h3{font-size:13px;margin:0 0 12px}.lesson{background:var(--soft);border-left:3px solid var(--accent);padding:9px;margin-bottom:8px;border-radius:7px;font-size:12px}.lesson b{display:block}.note{font-size:13px;color:var(--muted)}.toast{position:fixed;bottom:85px;right:18px;background:#123455;color:white;padding:12px 18px;border-radius:12px;z-index:100;max-width:340px;box-shadow:0 7px 30px #0003}.tabs{display:flex;gap:8px;margin:14px 0;flex-wrap:wrap}.hide{display:none!important}.mobile-nav{display:none}.separator{margin:20px 0;border:0;border-top:1px solid var(--line)}.modal-back{position:fixed;inset:0;background:#051326aa;display:grid;place-items:center;padding:18px;z-index:60}.modal{background:var(--surface);color:var(--ink);border-radius:18px;width:min(700px,100%);max-height:90vh;overflow:auto;padding:24px}.modal h2{margin-top:0}.footer-note{font-size:12px;color:var(--muted);margin-top:24px}.loading{margin:25vh auto;text-align:center}.progress{height:7px;border-radius:9px;background:var(--line);overflow:hidden}.progress span{display:block;background:var(--accent);height:100%}@media(max-width:900px){.shell{display:block;padding:18px 14px 100px}.sidebar{display:none}.mobile-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:35;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);padding:6px 5px calc(6px + env(safe-area-inset-bottom))}.mobile-nav button{background:none;color:var(--muted);font-size:11px;padding:10px 1px}.mobile-nav button.active{color:var(--accent);font-weight:850}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.two{grid-template-columns:1fr}}@media(max-width:530px){.grid,.fields{grid-template-columns:1fr}.card{padding:16px}.top{margin-bottom:16px}.kpi{font-size:24px}}@media print{.sidebar,.mobile-nav,.actions,.top button,.offline,.btn{display:none!important}.shell{display:block;padding:0}.card{border:0}.week{min-width:0;grid-template-columns:repeat(7,1fr)}.day{min-width:0;overflow-wrap:anywhere}}

/* Dedicated first-launch onboarding; normal navigation appears after profile save. */
.welcome-screen{min-height:100vh;padding:40px 16px;background:var(--bg);display:flex;justify-content:center}
.welcome-wrap{width:min(640px,100%)}
.welcome-title{display:flex;align-items:center;gap:13px;margin-bottom:28px;font-size:21px}
.welcome-logo{width:47px;height:47px;border-radius:14px;display:grid;place-items:center;background:#123455;color:#fff;font-weight:900}
.welcome-card{padding:28px}
.welcome-card h1{font-size:clamp(25px,5vw,34px);margin:8px 0}
.welcome-card p{color:var(--muted)}
.welcome-card .actions{margin-top:16px}
.welcome-card button[type=submit]{width:100%;padding:14px}
.welcome-eyebrow{color:var(--accent);font-weight:800;font-size:12px;letter-spacing:1.3px}
.welcome-foot{line-height:1.65}
@media(max-width:530px){.welcome-screen{padding:24px 13px}.welcome-card{padding:20px}}

/* Venue-inspired weekly timetable for the student's own classes */
.weekly-scroll{margin-top:14px;border:1px solid var(--line);border-radius:12px}
.weekly-grid{display:grid;grid-template-columns:108px repeat(5,minmax(145px,1fr));min-width:840px;background:var(--surface)}
.weekly-heading{position:sticky;top:0;z-index:4;text-align:center;padding:11px 5px;font-weight:800;background:var(--soft);border-right:1px solid var(--line);border-bottom:2px solid var(--line)}
.weekly-heading span{display:block;font-size:11px;font-weight:500;color:var(--muted)}
.weekly-corner{z-index:5}.weekly-axis,.weekly-column{position:relative;min-width:0;border-right:1px solid var(--line)}
.weekly-time{position:absolute;width:100%;display:flex;align-items:flex-start;justify-content:center;padding-top:8px;color:var(--muted);font-size:12px;border-bottom:1px solid var(--line);background:var(--soft);font-variant-numeric:tabular-nums}
.weekly-hour{position:absolute;width:100%;height:75px;border-bottom:1px solid var(--line);background:transparent}
.weekly-column{background:repeating-linear-gradient(to bottom,transparent 0,transparent 74px,var(--line) 75px)}
.weekly-class{position:absolute;left:3px;right:3px;z-index:2;overflow:auto;border-left:4px solid var(--accent);border-radius:7px;padding:5px 6px;background:#d5eafa;color:#162d41;font-size:11px;line-height:1.26;box-shadow:0 1px 3px #0002;overflow-wrap:anywhere}
.weekly-class:nth-of-type(4n+2){background:#def4d9;border-left-color:#398247}
.weekly-class:nth-of-type(4n+3){background:#fce8c8;border-left-color:#b57521}
.weekly-class:nth-of-type(4n+4){background:#e7defa;border-left-color:#7653b2}
.weekly-class strong,.weekly-class span{display:block}
.weekly-class strong{font-size:12px}.weekly-class span{margin-top:2px}
.weekly-clash{outline:2px dashed #b72832;outline-offset:-2px}
.weekly-edit{margin-top:5px;padding:2px 7px;background:#ffffffd9;border:1px solid #afbecb;color:#18354c;border-radius:5px;font-size:10px}
@media print{.weekly-scroll{overflow:visible;border:0}.weekly-grid{min-width:0;grid-template-columns:75px repeat(5,minmax(0,1fr))}.weekly-class{font-size:9px;box-shadow:none}.weekly-edit{display:none}}
/* Install-app banner is independent from app re-renders. */
#ct-install-banner{position:fixed;right:16px;bottom:18px;z-index:110;width:min(390px,calc(100vw - 32px));display:flex;flex-direction:column;gap:11px;padding:17px 18px;border-radius:17px;background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:0 12px 48px #0004}
#ct-install-banner strong{font-size:16px}#ct-install-banner p{margin:4px 0 0;color:var(--muted);font-size:13px}#ct-install-banner .ct-install-actions{display:flex;gap:9px}#ct-install-now,#ct-install-later{border-radius:9px;padding:10px 14px;font-weight:700}#ct-install-now{background:var(--accent);color:white}#ct-install-later{background:var(--soft);color:var(--accent)}@media(max-width:900px){#ct-install-banner{bottom:calc(68px + env(safe-area-inset-bottom));}}@media print{#ct-install-banner{display:none!important}}

/* Separate the remove action from the edit control in the weekly grid. */
.weekly-class .weekly-remove{right:4px;left:auto;top:4px;background:#fff1f2;color:#991b1b;border:1px solid #fecdd3}.weekly-class .weekly-edit:not(.weekly-remove){right:69px}.weekly-class .weekly-remove:hover{background:#ffe4e6}

/* Exam schedule shares the teaching timetable grid, grouped by exam week. */
.exam-week{margin-top:18px}.exam-week h3{margin:0 0 8px}.exam-class{border-left-width:5px}.exam-class span{font-size:11px}.exam-class.weekly-clash{outline:2px solid #d53a3a}
@media print{.exam-week{break-inside:avoid}.exam-week .weekly-scroll{overflow:visible}.exam-week .weekly-grid{min-width:0!important;grid-template-columns:65px repeat(5,minmax(0,1fr))!important}.exam-class{overflow:hidden;font-size:9px}}