:root{
  --primary:#123B6D;
  --deep:#0D2C52;
  --deep-2:#0a2545;
  --slate:#6B7280;
  --light:#F5F7FA;
  --white:#FFFFFF;
  --accent:#DCE8F5;
  --border:#d6dfeb;
  --border-strong:#bdd0e4;
  --shadow:0 20px 45px rgba(5, 19, 36, .12);
  --radius:18px;
  --container:min(1180px, 92vw);
  --success:#0f7b44;
  --warning:#b7791f;
  --danger:#b3261e;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--deep);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:var(--container);margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;background:#fff;padding:.75rem 1rem;border-radius:10px;z-index:9999}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(13,44,82,.97);border-bottom:1px solid rgba(255,255,255,.08);backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:84px}
.brand{display:flex;align-items:center;gap:12px;color:var(--white)!important}
.brand-name{display:block;color:var(--white);font-weight:800;font-size:1.08rem;line-height:1;white-space:nowrap}
.brand-name small{display:block;font-size:.68rem;font-weight:700;opacity:.8;margin-top:4px;letter-spacing:.06em;text-transform:uppercase}
.brand-mark{position:relative;width:50px;height:50px;flex-shrink:0;border-radius:14px;background:linear-gradient(135deg, rgba(255,255,255,.12), rgba(255,255,255,.05));border:1px solid rgba(255,255,255,.16);box-shadow:0 10px 24px rgba(5,19,36,.22)}
.brand-mark .page{position:absolute;border-radius:9px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18)}
.brand-mark .page.back{width:19px;height:24px;left:11px;top:13px;transform:rotate(-8deg)}
.brand-mark .page.front{width:21px;height:26px;left:18px;top:10px}
.brand-mark .line{position:absolute;left:22px;width:10px;height:2px;background:rgba(255,255,255,.55);border-radius:99px}
.brand-mark .l1{top:17px}.brand-mark .l2{top:22px;width:9px}.brand-mark .l3{top:27px;width:8px}
.brand-mark .arrow{position:absolute;right:8px;top:16px;width:14px;height:14px;border-top:3px solid var(--accent);border-right:3px solid var(--accent);transform:rotate(45deg)}
.brand-mark .arrow::before{content:"";position:absolute;width:10px;height:3px;border-radius:99px;background:var(--accent);right:5px;top:5px;transform:rotate(-45deg)}
.nav{display:flex;align-items:center;gap:22px}.nav a{color:#e2ebf5;font-weight:600;font-size:.96rem}.nav a:hover,.nav a:focus-visible{color:#fff}.nav .cta-link{padding:.8rem 1rem;border-radius:999px;border:1px solid rgba(255,255,255,.18)}
.menu-toggle{display:none;background:none;border:0;padding:.35rem;cursor:pointer}.menu-toggle span{display:block;width:25px;height:2px;background:#fff;margin:5px 0;border-radius:999px}
.flash{padding:10px 0;font-weight:700}.flash-success{background:#eefbf4;color:#0d5a31}.flash-error{background:#fff1f0;color:#8b1d18}.flash-info{background:#eef5ff;color:#163f6f}
.page-shell{padding:42px 0 84px}
.auth-hero{background:linear-gradient(180deg,var(--deep) 0%, var(--deep-2) 100%);color:#fff;padding:74px 0}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:start}
.eyebrow{margin:0 0 12px;color:#bfd7f1;font-weight:800;font-size:.78rem;letter-spacing:.13em;text-transform:uppercase}
h1,h2,h3,h4{margin:0 0 14px;line-height:1.12;letter-spacing:-.02em}
h1{font-size:clamp(2.35rem,4vw,4.3rem);max-width:12ch}h2{font-size:clamp(1.7rem,2.6vw,2.8rem)}h3{font-size:1.18rem}h4{font-size:1rem}
p{margin:0 0 1rem}
.hero-text{color:#dbe7f4;max-width:760px}
.hero-points{display:grid;gap:10px;padding-left:18px;color:#dbe7f4}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:14px;padding:13px 18px;font-weight:800;cursor:pointer;transition:transform .15s ease, opacity .15s ease;border:none;font:inherit}
.btn:hover,.btn:focus-visible{transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:var(--white)}
.btn-secondary{border:1px solid rgba(255,255,255,.22);color:#fff;background:transparent}
.btn-soft{background:#edf4fb;color:var(--primary);border:1px solid var(--border)}
.btn-danger{background:#8e1b15;color:#fff}
.auth-card,.panel,.card,.stat-card,.meeting-card,.announcement-card,.table-card,.course-card,.shell-card,.admin-card{background:#fff;border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow)}
.auth-card{padding:26px;color:var(--deep)}
.auth-tabs{display:flex;gap:10px;margin-bottom:20px;background:#eef4fb;border:1px solid var(--border);padding:6px;border-radius:999px}
.auth-tabs button{flex:1;border:none;background:transparent;padding:11px 14px;border-radius:999px;font-weight:800;color:var(--primary);cursor:pointer}
.auth-tabs button.active{background:#fff;box-shadow:0 10px 24px rgba(13,44,82,.08)}
.tab-panel{display:none}.tab-panel.active{display:block}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
label{display:flex;flex-direction:column;gap:8px;font-size:.95rem;font-weight:700}
label.full{grid-column:1 / -1}
input,select,textarea{width:100%;border:1px solid var(--border);background:#fbfcfe;border-radius:12px;padding:13px 14px;font:inherit;color:var(--deep)}
textarea{resize:vertical;min-height:140px}
.helper{font-size:.92rem;color:var(--slate)}
.section{padding:34px 0}.section-soft{background:var(--light)}
.dashboard-grid{display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:start}
.sidebar{position:sticky;top:102px;background:linear-gradient(180deg,var(--deep) 0%, var(--deep-2) 100%);color:#fff;border-radius:24px;padding:22px;border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow)}
.sidebar a{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-radius:14px;color:#dbe7f4;font-weight:700}
.sidebar a:hover,.sidebar a.active{background:rgba(255,255,255,.1);color:#fff}
.sidebar .mini{font-size:.82rem;color:#bfd7f1;text-transform:uppercase;letter-spacing:.09em;margin:14px 0 8px}
.content-stack{display:grid;gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.stat-card{padding:22px}.stat-card strong{display:block;font-size:2rem;line-height:1;margin-bottom:8px}.stat-label{color:var(--slate);font-weight:700}
.panel{padding:24px}.panel-header{display:flex;align-items:start;justify-content:space-between;gap:12px;margin-bottom:18px}
.section-title{margin-bottom:0}.section-copy{color:var(--slate)}
.announcement-list,.meeting-list,.course-list{display:grid;gap:14px}
.announcement-card,.meeting-card,.course-card,.admin-card{padding:20px}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.badge{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:7px 11px;font-size:.82rem;font-weight:800;background:#eef4fb;color:var(--primary);border:1px solid var(--border)}
.badge.pending{background:#fff7eb;color:#8a5a14;border-color:#f0d19a}.badge.completed{background:#eefbf4;color:#0d5a31;border-color:#b9e4cb}.badge.enrolled{background:#eef4fb;color:#16416f}.badge.paid{background:#f0ecff;color:#5735a3;border-color:#d3c7ff}.badge.free{background:#edf9ff;color:#155e75;border-color:#bce8f5}
.muted{color:var(--slate)}
.progress{height:11px;background:#edf1f6;border-radius:999px;overflow:hidden;margin-top:10px}.progress > span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#2b5f99);border-radius:999px}
.kicker{font-size:.82rem;color:#6d86a3;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
.table-card{overflow:auto}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid #edf1f6}th{font-size:.84rem;text-transform:uppercase;letter-spacing:.08em;color:#6781a0}tr:last-child td{border-bottom:none}
.card-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.auth-card .btn-primary,form .btn-primary{background:var(--primary)!important;color:var(--white)!important;border:1px solid var(--primary)!important}.auth-card .btn-primary:hover,form .btn-primary:hover,.auth-card .btn-primary:focus-visible,form .btn-primary:focus-visible{background:var(--deep)!important;border-color:var(--deep)!important;color:var(--white)!important}
.course-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:.92rem;color:var(--slate)}
.lesson-list{display:grid;gap:12px}.lesson-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border:1px solid var(--border);border-radius:18px;background:#fbfcfe}
.resource-list{display:grid;gap:10px}
.empty-state{padding:28px;border:1px dashed var(--border-strong);border-radius:20px;background:#fbfcfe;color:var(--slate)}
.site-footer{background:#071c34;color:#dbe7f4;padding:34px 0 42px;margin-top:60px}.footer-grid{display:grid;grid-template-columns:1fr auto auto;gap:26px;align-items:start}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:10px}.footer-links,.footer-contact{display:grid;gap:8px}
@media (max-width: 1020px){.hero-grid,.dashboard-grid,.grid-3,.grid-2{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.sidebar{position:relative;top:0}}
@media (max-width: 760px){.menu-toggle{display:block}.nav{position:absolute;top:84px;left:4vw;right:4vw;background:rgba(13,44,82,.99);border:1px solid rgba(255,255,255,.1);padding:16px;border-radius:18px;display:none;flex-direction:column;align-items:flex-start}.nav.open{display:flex}.form-grid{grid-template-columns:1fr}.hero-grid{grid-template-columns:1fr}.brand-name{font-size:1rem}.brand-mark{width:44px;height:44px}}