/* ==========================================================================
   PrepMaster UPSC — Premium Theme
   Navy + Saffron, glassmorphism cards, Notion/Linear-inspired minimalism.
   ========================================================================== */

:root {
    --pm-navy: #0B1F3A;
    --pm-navy-light: #142c52;
    --pm-navy-lighter: #1c3a68;
    --pm-saffron: #FF9933;
    --pm-saffron-dark: #e6800f;
    --pm-white: #ffffff;
    --pm-grey-50: #f8f9fb;
    --pm-grey-100: #f1f3f7;
    --pm-grey-200: #e4e7ee;
    --pm-grey-400: #a3aab8;
    --pm-grey-600: #6b7284;
    --pm-grey-800: #2c3140;
    --pm-success: #22c55e;
    --pm-danger: #ef4444;
    --pm-warning: #f59e0b;
    --pm-info: #3b82f6;

    --pm-bg: var(--pm-grey-50);
    --pm-surface: rgba(255, 255, 255, 0.72);
    --pm-surface-solid: #ffffff;
    --pm-text: #1a1e2b;
    --pm-text-muted: var(--pm-grey-600);
    --pm-border: rgba(11, 31, 58, 0.08);
    --pm-radius: 16px;
    --pm-radius-sm: 10px;
    --pm-shadow: 0 4px 24px rgba(11, 31, 58, 0.06);
    --pm-shadow-lg: 0 12px 40px rgba(11, 31, 58, 0.12);
    --pm-sidebar-w: 264px;
}

[data-theme="dark"] {
    --pm-bg: #0a1120;
    --pm-surface: rgba(20, 30, 51, 0.65);
    --pm-surface-solid: #121b2e;
    --pm-text: #e8ecf5;
    --pm-text-muted: #8992a8;
    --pm-border: rgba(255, 255, 255, 0.08);
    --pm-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --pm-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

body {
    background: var(--pm-bg);
    color: var(--pm-text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    transition: background .25s ease, color .25s ease;
}

a { text-decoration: none; }

/* ---------- Glass Card ---------- */
.pm-card {
    background: var(--pm-surface);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border: 1px solid var(--pm-border);
    border-radius: var(--pm-radius);
    box-shadow: var(--pm-shadow);
    transition: transform .2s ease, box-shadow .2s ease;
}
.pm-card:hover { box-shadow: var(--pm-shadow-lg); }
.pm-card-solid {
    background: var(--pm-surface-solid);
    border: 1px solid var(--pm-border);
    border-radius: var(--pm-radius);
    box-shadow: var(--pm-shadow);
}
.pm-card-body { padding: 1.5rem; }

/* ---------- Layout Shell ---------- */
.pm-shell { display: flex; min-height: 100vh; }

.pm-sidebar {
    width: var(--pm-sidebar-w);
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--pm-navy) 0%, #081428 100%);
    color: #fff;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    overflow-y: auto;
    z-index: 1030;
    transition: transform .25s ease;
}
.pm-sidebar-brand {
    display: flex; align-items: center; gap: .6rem;
    padding: 1.4rem 1.4rem 1rem;
    font-weight: 700; font-size: 1.15rem; color: #fff;
}
.pm-sidebar-brand .dot { color: var(--pm-saffron); }

.pm-nav-section { padding: .5rem 1rem; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: rgba(255,255,255,.35); margin-top: .75rem; }

.pm-nav-link {
    display: flex; align-items: center; gap: .75rem;
    padding: .65rem 1.1rem; margin: .15rem .75rem;
    border-radius: 10px; color: rgba(255,255,255,.75);
    font-size: .92rem; font-weight: 500;
}
.pm-nav-link i { font-size: 1.05rem; width: 20px; text-align: center; }
.pm-nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.pm-nav-link.active { background: var(--pm-saffron); color: #1a1e2b; font-weight: 600; }

.pm-main { margin-left: var(--pm-sidebar-w); flex: 1; min-width: 0; }

.pm-topbar {
    position: sticky; top: 0; z-index: 1020;
    display: flex; align-items: center; justify-content: space-between;
    padding: .85rem 1.75rem;
    background: var(--pm-surface);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--pm-border);
}

.pm-content { padding: 1.75rem; }

/* ---------- Buttons ---------- */
.btn-pm-primary {
    background: var(--pm-saffron); border: none; color: #1a1e2b; font-weight: 600;
    border-radius: 10px; padding: .55rem 1.3rem;
}
.btn-pm-primary:hover { background: var(--pm-saffron-dark); color: #1a1e2b; }
.btn-pm-outline {
    background: transparent; border: 1.5px solid var(--pm-border); color: var(--pm-text);
    border-radius: 10px; padding: .55rem 1.3rem; font-weight: 600;
}
.btn-pm-navy { background: var(--pm-navy); border: none; color: #fff; border-radius: 10px; font-weight: 600; padding: .55rem 1.3rem; }

/* ---------- Badges / Pills ---------- */
.pm-pill { border-radius: 999px; padding: .25rem .75rem; font-size: .74rem; font-weight: 600; display: inline-flex; align-items: center; gap: .35rem; }
.pm-pill-success { background: rgba(34,197,94,.12); color: var(--pm-success); }
.pm-pill-danger { background: rgba(239,68,68,.12); color: var(--pm-danger); }
.pm-pill-warning { background: rgba(245,158,11,.12); color: var(--pm-warning); }
.pm-pill-info { background: rgba(59,130,246,.12); color: var(--pm-info); }
.pm-pill-muted { background: var(--pm-grey-200); color: var(--pm-grey-600); }

/* ---------- Stat Card ---------- */
.pm-stat { padding: 1.35rem; }
.pm-stat .icon-wrap {
    width: 44px; height: 44px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
}
.pm-stat h3 { font-size: 1.6rem; font-weight: 700; margin: .35rem 0 0; }
.pm-stat .label { font-size: .82rem; color: var(--pm-text-muted); }

/* ---------- Progress ---------- */
.pm-progress { height: 8px; border-radius: 999px; background: var(--pm-grey-200); overflow: hidden; }
.pm-progress-bar { height: 100%; background: linear-gradient(90deg, var(--pm-saffron), var(--pm-saffron-dark)); border-radius: 999px; }

/* ---------- Utilities ---------- */
.text-muted-pm { color: var(--pm-text-muted) !important; }
.pm-scroll::-webkit-scrollbar { width: 6px; height: 6px; }
.pm-scroll::-webkit-scrollbar-thumb { background: var(--pm-grey-400); border-radius: 999px; }

@media (max-width: 991px) {
    .pm-sidebar { transform: translateX(-100%); }
    .pm-sidebar.show { transform: translateX(0); }
    .pm-main { margin-left: 0; }
}