:root{--bg:#f4f7f8;--surface:#ffffff;--surface-alt:#e8f3f1;--text:#172026;--muted:#60707c;--line:#d7e2df;--primary:#0f766e;--primary-dark:#0b3d3f;--accent:#f59e0b;--danger:#e85d5d;--success:#15803d;--shadow:0 20px 50px rgba(15,61,63,0.08);--radius-lg:24px;--radius-md:18px;--radius-sm:12px;--sidebar-width:264px;--font-sans:"Segoe UI","Helvetica Neue",Helvetica,sans-serif}*{box-sizing:border-box}html{font-family:var(--font-sans)}body{margin:0;background:radial-gradient(circle at top left,rgba(15,118,110,.12),transparent 28%),linear-gradient(180deg,#f8fbfb 0,var(--bg) 100%);color:var(--text)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.page-shell{min-height:100vh}.auth-page{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:min(100%,980px);display:grid;grid-template-columns:1.1fr .9fr;grid-gap:24px;gap:24px;padding:24px;border-radius:28px;background:rgba(255,255,255,.88);border:1px solid 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10px;border-radius:999px;font-size:.84rem;font-weight:600}.badge--success{background:rgba(21,128,61,.12);color:var(--success)}.badge--warning{background:rgba(245,158,11,.16);color:#a16207}.badge--danger{background:rgba(232,93,93,.13);color:var(--danger)}.chart-placeholder{min-height:240px;border-radius:var(--radius-md);background:linear-gradient(180deg,rgba(15,118,110,.08),rgba(15,118,110,.01)),repeating-linear-gradient(90deg,rgba(15,118,110,.05) 0,rgba(15,118,110,.05) 1px,transparent 0,transparent 72px),repeating-linear-gradient(180deg,rgba(96,112,124,.08) 0,rgba(96,112,124,.08) 1px,transparent 0,transparent 48px);border:1px solid var(--line);position:relative;overflow:hidden}.chart-placeholder:after{content:"";position:absolute;inset:auto 0 24px 0;height:120px;background:linear-gradient(90deg,transparent,rgba(15,118,110,.2) 16%,rgba(15,118,110,.72) 48%,rgba(245,158,11,.65) 72%,transparent);-webkit-clip-path:polygon(0 80%,16% 62%,32% 72%,48% 36%,64% 46%,78% 20%,100% 6%,100% 100%,0 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span{width:100%;border-radius:14px;background:linear-gradient(180deg,#14b8a6,#0f766e);min-height:14px}.bar-chart__label{font-weight:700}.bar-chart__meta{color:var(--muted);font-size:.8rem;text-align:center}.student-hero{display:grid;grid-template-columns:auto 1fr auto;grid-gap:20px;gap:20px;align-items:center}.avatar{width:84px;height:84px;border-radius:24px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:white;font-weight:700;font-size:1.5rem}.hero-meta{display:grid;grid-gap:6px;gap:6px}.hero-subline{color:var(--muted)}.hero-actions,.hero-subline{display:flex;gap:10px;flex-wrap:wrap}.primary-button,.secondary-button{border:0;border-radius:14px;padding:12px 16px}.primary-button{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:white}.secondary-button{background:rgba(15,118,110,.08);color:var(--primary-dark)}.danger-button{border:0;border-radius:14px;padding:12px 16px;background:rgba(232,93,93,.12);color:var(--danger)}.inline-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.inline-button{padding:8px 12px;border-radius:10px;font-size:.86rem}.inline-error{color:var(--danger);font-size:.82rem}.inline-editor{width:100%}.inline-editor summary{list-style:none;cursor:pointer}.inline-editor summary::-webkit-details-marker{display:none}.inline-editor__form{margin-top:10px;display:grid;grid-gap:10px;gap:10px;padding:14px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.86)}.inline-editor__form input,.inline-editor__form select,.inline-editor__form textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:white}.inline-grid{display:grid;grid-gap:10px;gap:10px}.inline-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}.filter-toolbar{justify-content:space-between;gap:12px;margin-bottom:14px}.filter-form,.filter-toolbar{display:flex;align-items:center;flex-wrap:wrap}.filter-form{gap:10px}.filter-form input,.filter-form select{min-width:180px;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:white}.checkbox-field{display:flex;align-items:center;gap:10px;color:var(--muted)}.tabs{display:flex;gap:10px;flex-wrap:wrap}.tab{padding:10px 14px;border-radius:999px;background:white;border:1px solid var(--line);color:var(--muted)}.tab--active{background:var(--primary-dark);color:white;border-color:transparent}.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:16px;gap:16px}.metric-card{padding:18px;border-radius:var(--radius-md);background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(232,243,241,.82));border:1px solid var(--line)}.metric-card strong{display:block;font-size:1.4rem;margin-top:10px}.split-grid{display:grid;grid-template-columns:1.2fr .8fr;grid-gap:20px;gap:20px}.progress-bar{height:10px;border-radius:999px;background:#dbe7e5;overflow:hidden}.progress-bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#4fd1c5)}.planner-shell{display:grid;grid-gap:20px;gap:20px}.planner-panel{padding:28px;border-radius:28px;background:rgba(255,255,255,.9);border:1px solid rgba(215,226,223,.78);box-shadow:var(--shadow)}.planner-panel--hero{display:grid;grid-gap:20px;gap:20px}.planner-panel__heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}.planner-heading{display:flex;gap:18px;align-items:flex-start}.planner-heading__bar{width:8px;min-height:56px;border-radius:999px;background:linear-gradient(180deg,#4f46e5,#2563eb)}.planner-heading h2{margin:0;font-size:clamp(1.9rem,3vw,2.6rem)}.planner-heading p{margin:10px 0 0;color:var(--muted);line-height:1.6;max-width:760px}.planner-pdf-button{border:1px solid rgba(239,68,68,.2);border-radius:18px;padding:14px 18px;background:rgba(255,248,248,.94);color:#dc2626;font-weight:700}.planner-toolbar-card{display:grid;grid-gap:16px;gap:16px;padding:20px;border-radius:22px;background:#fbfcfe;border:1px solid rgba(215,226,223,.9)}.planner-toolbar-card__row{display:flex;justify-content:space-between;gap:16px;align-items:center;flex-wrap:wrap}.planner-toolbar-card__row--secondary{align-items:flex-start}.planner-nav{display:flex;gap:10px;flex-wrap:wrap}.planner-nav__button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 18px;border-radius:16px;background:white;border:1px solid var(--line);color:#334155;font-weight:700;box-shadow:0 8px 20px rgba(15,61,63,.04)}.planner-nav__button--primary{background:linear-gradient(135deg,#2563eb,#4f46e5);color:white;border-color:transparent}.planner-nav__button--icon{width:52px;padding:0}.planner-toolbar-card__meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.planner-toolbar-card__meta strong{font-size:1.1rem;color:#24324a}.planner-bullet{width:11px;height:11px;border-radius:999px;background:#3b82f6;box-shadow:0 0 0 6px rgba(59,130,246,.12)}.planner-switch{display:inline-flex;align-items:center;gap:12px;position:relative;padding:12px 16px;border-radius:16px;background:white;border:1px solid var(--line);color:var(--muted);font-weight:600}.planner-switch input{position:absolute;inset:0;opacity:0}.planner-switch__track{width:52px;height:30px;border-radius:999px;background:#d1d5db;position:relative;transition:background .2s ease}.planner-switch__track:after{content:"";position:absolute;top:4px;left:4px;width:22px;height:22px;border-radius:999px;background:white;box-shadow:0 4px 12px rgba(15,23,42,.16);transition:transform .2s ease}.planner-switch input:checked+.planner-switch__track{background:linear-gradient(135deg,#2563eb,#4f46e5)}.planner-switch input:checked+.planner-switch__track:after{transform:translateX(22px)}.planner-actions{display:flex;gap:12px;flex-wrap:wrap}.planner-action{border:1px solid rgba(203,213,225,.9);border-radius:16px;padding:14px 20px;background:white;color:#334155;font-weight:700;box-shadow:0 8px 20px rgba(15,61,63,.04)}.planner-action--primary{background:linear-gradient(135deg,#2563eb,#4f46e5);color:white;border-color:transparent}.planner-action--success{background:linear-gradient(135deg,#14b8a6,#0f766e);color:white;border-color:transparent}.planner-action--active{box-shadow:0 12px 28px rgba(15,118,110,.24)}.planner-filters{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.planner-student-select{display:grid;grid-gap:8px;gap:8px;min-width:250px;color:var(--muted);font-weight:600}.planner-student-select select{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:white}.planner-banner{padding:12px 14px;border-radius:16px;background:rgba(20,184,166,.08);color:#0f766e;font-weight:600}.planner-inline-card{display:grid;grid-gap:14px;gap:14px;padding:18px;border-radius:20px;background:white;border:1px solid var(--line)}.planner-inline-card__header{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center;color:var(--muted)}.planner-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:16px;gap:16px}.planner-metric{padding:18px 20px;border-radius:22px;background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(239,246,255,.82));border:1px solid rgba(215,226,223,.78);box-shadow:var(--shadow)}.planner-metric span{color:var(--muted);display:block;margin-bottom:8px}.planner-metric strong{font-size:1.5rem;color:#1e293b}.planner-week-grid{display:grid;grid-template-columns:repeat(7,minmax(160px,1fr));grid-gap:0;gap:0;border:1px solid rgba(215,226,223,.9);border-radius:24px;overflow:hidden;background:white}.planner-day{min-height:360px;border-right:1px solid rgba(215,226,223,.9);display:grid;grid-template-rows:auto 1fr;background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(246,248,252,.92))}.planner-day:last-child{border-right:0}.planner-day--today{background:linear-gradient(180deg,rgba(239,246,255,.95),rgba(255,255,255,.9))}.planner-day--droppable{transition:background .18s ease,transform .18s ease}.planner-day__header{padding:18px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center;border-bottom:1px solid rgba(215,226,223,.9);background:white}.planner-day__header strong{display:block;font-size:1.05rem;color:#334155}.planner-day__header span{color:var(--muted)}.planner-day__header--today{background:linear-gradient(135deg,#4f46e5,#3b82f6)}.planner-day__header--today span,.planner-day__header--today strong{color:white}.planner-day__add{width:38px;height:38px;border-radius:12px;border:1px solid rgba(203,213,225,.9);background:white;color:#334155;font-size:1.35rem;line-height:1}.planner-day__body{padding:16px;display:grid;grid-gap:12px;gap:12px;align-content:flex-start}.planner-empty{min-height:90px;display:grid;place-items:center;text-align:center;color:#94a3b8;border-radius:18px;border:1px dashed rgba(148,163,184,.35);background:rgba(248,250,252,.9)}.planner-task-card{display:grid;grid-gap:10px;gap:10px;padding:14px;border-radius:18px;border:1px solid rgba(215,226,223,.9);background:white;box-shadow:0 10px 26px rgba(15,61,63,.06)}.planner-task-card--draggable{cursor:-webkit-grab;cursor:grab}.planner-task-card__top{display:grid;grid-gap:8px;gap:8px}.planner-task-card__top strong{font-size:.98rem;color:#1e293b}.planner-task-card__meta,.planner-task-card__stats{display:flex;gap:8px;flex-wrap:wrap}.planner-task-card__meta span,.planner-task-card__stats span{display:inline-flex;align-items:center;padding:6px 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