:root{--bg: #f6f7fb;--surface: rgba(255, 255, 255, .88);--surface-solid: #ffffff;--surface-strong: #f8fafc;--border: rgba(15, 23, 42, .08);--border-strong: rgba(15, 23, 42, .14);--text: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--accent: #0f172a;--accent-soft: rgba(15, 23, 42, .06);--shadow: 0 18px 50px rgba(15, 23, 42, .08);--shadow-soft: 0 10px 30px rgba(15, 23, 42, .06);--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--pending: #3b82f6;--radius-xl: 24px;--radius-lg: 18px;--radius-md: 14px;--radius-sm: 10px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--sidebar-width: 292px;--sidebar-collapsed-width: 64px;--topbar-height: 72px}:root[data-theme=dark]{--bg: #0b1220;--surface: rgba(15, 23, 42, .84);--surface-solid: #0f172a;--surface-strong: #111c31;--border: rgba(148, 163, 184, .14);--border-strong: rgba(148, 163, 184, .22);--text: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--accent: #f8fafc;--accent-soft: rgba(255, 255, 255, .06);--shadow: 0 18px 50px rgba(0, 0, 0, .28);--shadow-soft: 0 10px 30px rgba(0, 0, 0, .22)}*{box-sizing:border-box}html{background:var(--bg);color-scheme:light}:root[data-theme=dark] html{color-scheme:dark}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at top left,rgba(59,130,246,.08),transparent 26%),radial-gradient(circle at bottom right,rgba(15,23,42,.04),transparent 34%),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.72}a{color:inherit}code{padding:.15rem .35rem;border-radius:.45rem;background:var(--accent-soft);color:var(--text);--font-heading: "Consolas", "Courier New", monospace}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:var(--font-heading)}h1{font-size:clamp(2rem,4vw,3rem);line-height:1.05;letter-spacing:-.04em;margin-bottom:.45rem}h2{font-size:1.2rem;line-height:1.2;letter-spacing:-.02em;margin-bottom:1rem}h3{font-size:1rem;margin-bottom:.75rem}p.subtitle{color:var(--text-secondary);font-size:1rem;margin-bottom:1.8rem}.app-shell{min-height:100vh}.auth-shell{display:flex;align-items:center;justify-content:center;padding:2rem}.auth-card{width:min(100%,460px);text-align:center}.topbar{position:fixed;inset:0 0 auto 0;height:var(--topbar-height);z-index:40;display:flex;align-items:center;justify-content:space-between;padding:0 1rem;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface-solid) 80%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.topbar-left,.topbar-right{display:flex;align-items:center;gap:.75rem}.brand-mark{display:inline-flex;align-items:center;gap:.55rem;font-weight:700;letter-spacing:-.02em;color:var(--text)}.auth-user{display:inline-flex;align-items:center;gap:.65rem;padding:.35rem .6rem;border-radius:999px;text-decoration:none;color:var(--text);background:var(--surface-solid);border:1px solid var(--border);box-shadow:var(--shadow-soft)}.auth-avatar{width:28px;height:28px;border-radius:999px;object-fit:cover}.icon-button{width:40px;height:40px;border-radius:999px;border:1px solid var(--border);background:var(--surface-solid);color:var(--text);display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow-soft);transition:transform .16s ease,border-color .16s ease,background-color .16s ease}.icon-button:hover{transform:translateY(-1px);border-color:var(--border-strong)}.sidebar-backdrop{position:fixed;inset:var(--topbar-height) 0 0 0;background:#0f172a40;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:34}.sidebar-backdrop.open{opacity:1;pointer-events:auto}.sidebar{position:fixed;top:var(--topbar-height);left:0;z-index:35;width:var(--sidebar-width);height:calc(100vh - var(--topbar-height));padding:1.25rem;background:var(--surface);border-right:1px solid var(--border);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);display:flex;flex-direction:column;gap:1rem;box-shadow:var(--shadow);transition:width .2s ease,padding .2s ease,transform .2s ease}.app-shell.sidebar-collapsed .sidebar{width:var(--sidebar-collapsed-width);padding:.6rem}.app-shell.sidebar-collapsed .sidebar-nav,.app-shell.sidebar-collapsed .sidebar-summary{display:none}.app-shell.sidebar-collapsed .sidebar-header{justify-content:center}.sidebar-header{display:flex;align-items:center;justify-content:space-between;gap:.75rem}.logo{display:inline-flex;align-items:center;gap:.7rem;font-size:1.05rem;font-weight:700;letter-spacing:-.03em}.logo span span{color:var(--text-muted)}.sidebar-nav{display:flex;flex-direction:column;gap:.5rem}.nav-menu{list-style:none;padding:0;margin:0}.nav-item{width:100%;display:flex;align-items:center;gap:.75rem;padding:.9rem 1rem;border:1px solid transparent;border-radius:var(--radius-md);background:transparent;color:var(--text-secondary);text-align:left;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.nav-item:hover{background:var(--accent-soft);color:var(--text)}.nav-item.active{background:var(--surface-solid);border-color:var(--border);color:var(--text);box-shadow:var(--shadow-soft)}.sidebar-summary{margin-top:auto;padding:1rem;border-radius:var(--radius-lg);background:var(--surface-solid);border:1px solid var(--border);box-shadow:var(--shadow-soft)}.summary-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:.65rem}.summary-status{display:flex;align-items:center;gap:.6rem;font-size:.95rem;color:var(--text)}.status-dot{width:9px;height:9px;border-radius:999px;display:inline-block}.status-dot.success{background:var(--success)}.status-dot.danger{background:var(--danger)}.summary-meta{margin-top:.5rem;color:var(--text-muted);font-size:.85rem}.main-content{margin-left:var(--sidebar-width);padding:calc(var(--topbar-height) + 1.5rem) 1.5rem 2rem;width:calc(100% - var(--sidebar-width))}.app-shell.sidebar-collapsed .main-content{margin-left:var(--sidebar-collapsed-width);width:calc(100% - var(--sidebar-collapsed-width))}.app-shell.sidebar-collapsed .main-content>div{max-width:none}.main-content>div{max-width:1280px}.glass-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:1.35rem;box-shadow:var(--shadow)}.header-actions{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:1rem}.form-group{margin-bottom:1rem;display:flex;flex-direction:column;gap:.5rem}label{color:var(--text-secondary);font-size:.9rem;font-weight:600}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface-solid);color:var(--text);padding:.9rem 1rem;outline:none;transition:border-color .16s ease,box-shadow .16s ease,background-color .16s ease}input::placeholder,textarea::placeholder{color:var(--text-muted)}input:focus,select:focus,textarea:focus{border-color:#3b82f68c;box-shadow:0 0 0 4px #3b82f61f}.btn-primary,.btn-secondary,.btn-danger{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:42px;border-radius:var(--radius-md);border:1px solid transparent;padding:.7rem 1rem;font-weight:600;transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,border-color .16s ease}.btn-primary:hover,.btn-secondary:hover,.btn-danger:hover{transform:translateY(-1px)}.btn-primary{background:color-mix(in srgb,var(--text-muted) 24%,var(--surface-solid));color:var(--text);border-color:color-mix(in srgb,var(--border-strong) 65%,var(--border));box-shadow:var(--shadow-soft)}.btn-secondary{background:color-mix(in srgb,var(--surface-solid) 85%,var(--text-muted));color:var(--text);border-color:var(--border)}.btn-danger{background:color-mix(in srgb,var(--text-muted) 18%,var(--surface-solid));color:var(--text);border-color:color-mix(in srgb,var(--border-strong) 45%,var(--border))}.badge{display:inline-flex;align-items:center;gap:.4rem;border-radius:999px;padding:.35rem .7rem;font-size:.78rem;font-weight:600;border:1px solid transparent}.badge-success{background:#10b9811f;color:var(--success);border-color:#10b98129}.badge-error{background:#ef44441f;color:var(--danger);border-color:#ef444429}.badge-warning{background:#f59e0b1f;color:var(--warning);border-color:#f59e0b29}.badge-pending{background:#3b82f61f;color:var(--pending);border-color:#3b82f629}.table-container{overflow:auto;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface-solid)}table{width:100%;border-collapse:collapse}thead th{text-align:left;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);padding:.9rem 1rem;border-bottom:1px solid var(--border);background:var(--surface-strong)}tbody td{padding:.95rem 1rem;border-bottom:1px solid var(--border);color:var(--text)}tbody tr:last-child td{border-bottom:none}.main-content ul[style*="list-style: none"]{padding-left:0}.main-content .glass-card ul{list-style:none;padding-left:0;margin:0}.main-content .glass-card li.nav-item{cursor:pointer}.main-content textarea{min-height:140px;resize:vertical}.gradient-text{color:var(--accent)}.small-helper,.summary-meta,.main-content p[style*="color: var(--text-secondary)"]{color:var(--text-secondary)}.mobile-burger-button{display:none}.sidebar-toggle-button{display:inline-flex}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:flex;align-items:center;justify-content:center;padding:1rem;background:#0f172a6b;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.modal-card{width:min(720px,96vw);max-height:92vh;overflow:auto;padding:1.25rem;border-radius:var(--radius-xl);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow)}.assignment-filters-row{display:grid;grid-template-columns:1fr 1fr 1.7fr;gap:.75rem;align-items:end}.assignment-filter-item{display:flex;flex-direction:column;gap:.35rem}@media(max-width:1024px){.sidebar{transform:translate(-102%);transition:transform .2s ease;width:min(320px,calc(100vw - 1.25rem))}.sidebar.open{transform:translate(0)}.main-content{margin-left:0;width:100%;padding-left:1rem;padding-right:1rem}.mobile-burger-button{display:inline-flex}.sidebar-toggle-button{display:none}.header-actions,.topbar{gap:.75rem}.assignment-filters-row{grid-template-columns:1fr}.main-content>div>div[style*=grid-template-columns]{grid-template-columns:1fr!important}.header-actions{flex-direction:column;align-items:flex-start}}@media(max-width:720px){.topbar{padding-inline:.75rem}.main-content{padding-top:calc(var(--topbar-height) + 1rem)}.glass-card{padding:1rem;border-radius:1.1rem}.sidebar-summary{padding:.85rem}.main-content>div>div[style*=grid-template-columns]{gap:1rem!important}}