:root{--brand:#301B5E;--brand-2:#4a2e8a;--gold:#AF874C;--accent:#F7941D;--sidebar-w:264px;--radius:14px;
--bg:#f4f5fa;--card:#fff;--line:#e6e8f0;--ink:#1d1b2e}
[data-bs-theme=dark]{--bg:#12111c;--card:#1b1a29;--line:#2c2b40;--ink:#ecebf5}
html,body{font-family:'Inter',system-ui,-apple-system,Segoe UI,sans-serif}
body{background:var(--bg);color:var(--ink);font-size:.925rem}
a{color:var(--brand-2);text-decoration:none}[data-bs-theme=dark] a{color:#b9a6f5}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:linear-gradient(180deg,#301B5E,#21103f);color:#d8d2ee;position:fixed;inset:0 auto 0 0;padding:1.1rem .85rem;overflow-y:auto;z-index:1040;transition:transform .25s}
.brand{display:flex;gap:.7rem;align-items:center;color:#fff;padding:.3rem .6rem 1.2rem;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:.8rem}
.brand:hover{color:#fff}
.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--gold);display:grid;place-items:center;font-size:1.4rem;color:#fff}
.brand-text{line-height:1.15}.brand-text small{display:block;font-size:.68rem;opacity:.65;font-weight:400}
.sidebar .nav-link{color:#cfc8ea;display:flex;gap:.7rem;align-items:center;padding:.55rem .8rem;border-radius:10px;font-weight:500}
.sidebar .nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar .nav-link.active{background:rgba(255,255,255,.16);color:#fff;box-shadow:inset 3px 0 0 var(--accent)}
.nav-section{font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;opacity:.5;padding:1rem .8rem .3rem}
.main{margin-left:var(--sidebar-w);flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:1030;display:flex;align-items:center;gap:1rem;padding:.7rem 1.5rem;background:color-mix(in srgb,var(--card) 85%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.global-search{position:relative;flex:1;max-width:460px}.global-search i{position:absolute;left:.9rem;top:50%;transform:translateY(-50%);opacity:.5}
.global-search input{width:100%;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:999px;padding:.5rem 1rem .5rem 2.4rem}
.btn-icon{border:0;background:transparent;color:inherit;border-radius:10px}.btn-icon:hover{background:var(--bg)}
.user-chip{display:flex;align-items:center;gap:.5rem;border:1px solid var(--line);border-radius:999px;padding:.25rem .8rem .25rem .3rem}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;display:inline-grid;place-items:center;font-size:.72rem;font-weight:600}
.avatar.lg{width:64px;height:64px;font-size:1.3rem;background:linear-gradient(135deg,var(--brand),var(--gold))}
.content{padding:1.5rem;flex:1}
.app-footer{padding:1rem 1.5rem;color:#8a889a;font-size:.8rem;text-align:center}
.page-head{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;margin-bottom:1.3rem}
.page-head h1{font-size:1.5rem;font-weight:700;margin:0}
.card{border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.card-header{background:transparent;border-bottom:1px solid var(--line);font-weight:600}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff}.btn-brand:hover{background:var(--brand-2);border-color:var(--brand-2);color:#fff}
.btn-gold{background:var(--accent);border-color:var(--accent);color:#fff}.btn-gold:hover{filter:brightness(.95);color:#fff}
.stat{display:flex;gap:1rem;align-items:center;padding:1.1rem 1.2rem}
.stat .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.3rem;color:#fff}
.stat .num{font-size:1.65rem;font-weight:700;line-height:1}.stat .lbl{color:#8a889a;font-size:.8rem}
.table{--bs-table-bg:transparent}.table thead th{font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:#8a889a;font-weight:600;border-bottom-width:1px;white-space:nowrap}
.table-hover tbody tr:hover{background:color-mix(in srgb,var(--brand) 5%,transparent)}
.form-label{font-weight:500;font-size:.82rem}.form-control,.form-select,.ts-control{border-radius:10px}
.section-title{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:#8a889a;font-weight:600;margin:1.2rem 0 .6rem}
.dl{display:grid;grid-template-columns:170px 1fr;gap:.45rem 1rem;margin:0}.dl dt{color:#8a889a;font-weight:500}.dl dd{margin:0}
@media(max-width:575px){.dl{grid-template-columns:1fr}.dl dt{margin-top:.5rem}}
.grade-pill{display:inline-block;min-width:44px;text-align:center;padding:.15rem .55rem;border-radius:999px;font-weight:700;font-size:.78rem}
.grade-success{background:#d9f5e5;color:#12673a}.grade-warning{background:#fff1cc;color:#8a5a00}.grade-danger{background:#fde0e0;color:#a11b1b}.grade-secondary{background:#ececf3;color:#555}
.subject-card{border:1px solid var(--line);border-radius:12px;padding:.7rem .9rem;display:flex;gap:.7rem;align-items:center;cursor:pointer;transition:.15s}
.subject-card:hover{border-color:var(--brand-2)}.subject-card:has(input:checked){background:color-mix(in srgb,var(--brand) 8%,transparent);border-color:var(--brand-2)}
.mark-row{display:grid;grid-template-columns:1fr 130px 70px;gap:.8rem;align-items:center;padding:.55rem 0;border-bottom:1px solid var(--line)}
.empty{text-align:center;padding:2.5rem 1rem;color:#8a889a}.empty i{font-size:2rem;display:block;margin-bottom:.4rem}
.nav-tabs .nav-link{border:0;color:#8a889a;font-weight:500}.nav-tabs .nav-link.active{color:var(--brand-2);border-bottom:2px solid var(--accent);background:transparent}
.sidebar-backdrop{display:none}
@media(max-width:991px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:none}.main{margin-left:0}.sidebar-backdrop.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1035}.content{padding:1rem}}
/* auth */
.auth-body{background:var(--bg)}.auth-wrap{display:flex;min-height:100vh}
.auth-hero{flex:1.1;background:linear-gradient(145deg,#301B5E,#1b0d3a 70%);color:#fff;padding:4rem;flex-direction:column;justify-content:space-between}
.auth-hero h1{font-size:2.2rem;font-weight:700;line-height:1.2}.auth-hero h1 span{color:var(--gold)}.auth-hero p{opacity:.8;max-width:420px}
.auth-logo{width:64px;height:64px;border-radius:18px;background:var(--gold);display:grid;place-items:center;font-size:2rem;margin-bottom:2rem}
.auth-points{list-style:none;padding:0;display:grid;gap:.7rem;opacity:.9}.auth-points i{color:var(--accent);margin-right:.5rem}
.auth-panel{flex:1;display:grid;place-items:center;padding:2rem}.auth-card{width:100%;max-width:400px;background:var(--card);padding:2.2rem;border-radius:20px;border:1px solid var(--line);box-shadow:0 20px 50px rgba(48,27,94,.12)}
.error-page{display:grid;place-items:center;min-height:100vh;background:#f4f5fa;font-family:system-ui,sans-serif}.error-card{text-align:center;max-width:640px;padding:2rem}.error-code{font-size:4rem;font-weight:800;color:#301B5E}.error-card pre{text-align:left;white-space:pre-wrap;background:#fff;padding:1rem;border-radius:10px;font-size:.8rem}
@media print{.sidebar,.topbar,.app-footer,.no-print{display:none!important}.main{margin:0}}