/* =====================================================================
   Skillbase - shared "app" brand stylesheet
   Used by: Student portal, College portal, Corporate portal, Public site
   (Admin panel intentionally uses AdminLTE instead - see diagram split)
   ===================================================================== */

:root{
    --skb-primary: #3730a3;       /* deep indigo - brand */
    --skb-primary-dark: #272163;
    --skb-primary-light: #6d63e0;
    --skb-accent: #f59e0b;        /* warm amber - achievement/CTA */
    --skb-bg: #f6f5fb;
    --skb-surface: #ffffff;
    --skb-text: #1f2333;
    --skb-text-muted: #6b7280;
    --skb-border: #e6e4f3;
    --skb-success: #16a34a;
    --skb-danger: #dc2626;
    --skb-radius: 12px;
}

*{ box-sizing: border-box; }

body.skb-body{
    margin:0;
    font-family:'Inter', -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background:var(--skb-bg);
    color:var(--skb-text);
}

a{ text-decoration:none; color:var(--skb-primary); }

/* ---------- App shell: fixed sidebar + main ---------- */
.skb-shell{ display:flex; min-height:100vh; }

.skb-sidebar{
    width:248px; flex-shrink:0; background:var(--skb-primary);
    color:#fff; padding:24px 0; position:sticky; top:0; height:100vh;
}
.skb-sidebar .skb-logo{
    font-size:20px; font-weight:700; padding:0 24px 24px; display:block; color:#fff;
}
.skb-sidebar .skb-logo span{ color:var(--skb-accent); }
.skb-nav a{
    display:flex; align-items:center; gap:10px; color:rgba(255,255,255,.78);
    padding:11px 24px; font-size:14.5px; font-weight:500; border-left:3px solid transparent;
}
.skb-nav a:hover{ color:#fff; background:rgba(255,255,255,.06); }
.skb-nav a.active{ color:#fff; background:rgba(255,255,255,.12); border-left-color:var(--skb-accent); }
.skb-nav .skb-section-label{ padding:18px 24px 8px; font-size:11px; letter-spacing:.08em; color:rgba(255,255,255,.45); text-transform:uppercase; }

.skb-topbar{
    display:flex; justify-content:space-between; align-items:center;
    padding:16px 28px; background:var(--skb-surface); border-bottom:1px solid var(--skb-border);
}
.skb-topbar .skb-user{ font-weight:600; font-size:14px; }
.skb-topbar .skb-role-pill{
    font-size:11px; background:var(--skb-bg); color:var(--skb-primary);
    padding:3px 10px; border-radius:99px; margin-left:8px; font-weight:600;
}

.skb-main{ flex:1; padding:28px; }
.skb-content-area{ flex:1; display:flex; flex-direction:column; min-width:0; }

/* ---------- Cards / surfaces ---------- */
.skb-card{
    background:var(--skb-surface); border:1px solid var(--skb-border);
    border-radius:var(--skb-radius); padding:22px; margin-bottom:20px;
}
.skb-card h3{ margin:0 0 14px; font-size:16px; font-weight:700; }

.skb-stat-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(190px,1fr)); gap:16px; margin-bottom:24px; }
.skb-stat{ background:var(--skb-surface); border:1px solid var(--skb-border); border-radius:var(--skb-radius); padding:18px 20px; }
.skb-stat .skb-stat-num{ font-size:28px; font-weight:800; color:var(--skb-primary); }
.skb-stat .skb-stat-label{ font-size:13px; color:var(--skb-text-muted); margin-top:2px; }

/* ---------- Table ---------- */
.skb-table{ width:100%; border-collapse:collapse; font-size:14px; }
.skb-table th{ text-align:left; padding:10px 12px; color:var(--skb-text-muted); font-weight:600; border-bottom:1px solid var(--skb-border); font-size:12.5px; text-transform:uppercase; letter-spacing:.03em; }
.skb-table td{ padding:12px; border-bottom:1px solid var(--skb-border); }
.skb-table tr:last-child td{ border-bottom:none; }

/* ---------- Buttons / badges ---------- */
.skb-btn{
    display:inline-block; background:var(--skb-primary); color:#fff; border:none;
    padding:9px 18px; border-radius:8px; font-weight:600; font-size:14px; cursor:pointer;
}
.skb-btn:hover{ background:var(--skb-primary-dark); color:#fff; }
.skb-btn-accent{ background:var(--skb-accent); color:#1f2333; }
.skb-btn-outline{ background:transparent; border:1px solid var(--skb-primary); color:var(--skb-primary); }
.skb-btn-sm{ padding:6px 12px; font-size:13px; }

.skb-badge{ display:inline-block; padding:3px 10px; border-radius:99px; font-size:12px; font-weight:600; }
.skb-badge-secondary{ background:#eef2ff; color:#4338ca; }
.skb-badge-success{ background:#dcfce7; color:#15803d; }
.skb-badge-warning{ background:#fef3c7; color:#92400e; }
.skb-badge-danger{ background:#fee2e2; color:#b91c1c; }
.skb-badge-info{ background:#e0f2fe; color:#0369a1; }
.skb-badge-dark{ background:#1f2333; color:#fff; }

.skb-form-group{ margin-bottom:16px; }
.skb-form-group label{ display:block; font-size:13.5px; font-weight:600; margin-bottom:6px; }
.skb-input, .skb-select, textarea.skb-input{
    width:100%; padding:10px 12px; border:1px solid var(--skb-border); border-radius:8px;
    font-size:14px; font-family:inherit; background:#fff;
}
.skb-input:focus, .skb-select:focus{ outline:none; border-color:var(--skb-primary); }
.skb-alert{ padding:12px 16px; border-radius:8px; margin-bottom:18px; font-size:14px; }
.skb-alert-success{ background:#dcfce7; color:#15803d; }
.skb-alert-error{ background:#fee2e2; color:#b91c1c; }

.skb-empty{ text-align:center; color:var(--skb-text-muted); padding:30px; }

/* ---------- Public marketing site ---------- */
.skb-hero{ background:linear-gradient(135deg, var(--skb-primary), var(--skb-primary-light)); color:#fff; padding:90px 24px; text-align:center; }
.skb-hero h1{ font-size:38px; font-weight:800; margin:0 0 14px; }
.skb-hero p{ font-size:17px; opacity:.9; max-width:600px; margin:0 auto 26px; }
.skb-navbar{ display:flex; justify-content:space-between; align-items:center; padding:18px 32px; background:#fff; border-bottom:1px solid var(--skb-border); }
.skb-navbar .skb-logo{ color:var(--skb-primary); font-weight:800; font-size:20px; }
.skb-navbar .skb-logo span{ color:var(--skb-accent); }
.skb-navbar nav a{ margin-left:22px; color:var(--skb-text); font-weight:500; font-size:14.5px; }
.skb-section{ padding:60px 24px; max-width:1100px; margin:0 auto; }
.skb-grid-3{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:20px; }
.skb-footer{ background:#1f2333; color:rgba(255,255,255,.7); text-align:center; padding:24px; font-size:13.5px; }

@media (max-width: 860px){
    .skb-sidebar{ display:none; }
    .skb-main{ padding:18px; }
}