/* ═══════════════════════════════════════════════════════════════
   IPMA Level D Training — Shared Design System
   Gilt für: index.php + reference.php
   ═══════════════════════════════════════════════════════════════ */

/* ── CUSTOM PROPERTIES ──────────────────────────────────────── */
:root {
    --brand:    #4f8ef7;
    --brand2:   #7c5cbf;
    --green:    #22c55e;
    --red:      #ef4444;
    --yellow:   #f59e0b;
    --orange:   #f97316;
    --radius:   14px;
    --radius-sm:10px;
    --font:     'Segoe UI', system-ui, -apple-system, sans-serif;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --shadow:   0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
    --shadow-lg:0 2px 8px rgba(0,0,0,.1), 0 8px 32px rgba(0,0,0,.1);
}

/* ── BASE ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body {
    font-family: var(--font);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── TYPOGRAPHY ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 { font-weight: 700; letter-spacing: -.01em; }

/* ── SURFACES / CARDS ───────────────────────────────────────── */
.surface {
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.surface-2 {
    background: var(--bs-tertiary-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: var(--radius-sm);
}
.card {
    border-radius: var(--radius) !important;
    box-shadow: var(--shadow) !important;
    border: 1px solid var(--bs-border-color) !important;
}
.card:hover {
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-1px);
    transition: .2s ease;
}

/* ── PROGRESS BAR ───────────────────────────────────────────── */
.prog {
    height: 6px; border-radius: 99px;
    background: var(--bs-border-color); overflow: hidden;
}
.prog-bar {
    height: 100%; border-radius: 99px;
    background: linear-gradient(90deg, var(--brand2), var(--brand));
    transition: width .5s cubic-bezier(.4,0,.2,1);
}

/* ── STAT CARDS ─────────────────────────────────────────────── */
.stat-card {
    border-radius: var(--radius-sm);
    padding: 14px 10px; text-align: center;
    border: 1px solid var(--bs-border-color);
    background: var(--bs-tertiary-bg);
    transition: .15s;
}
.stat-card:hover { border-color: var(--brand); }
.stat-val {
    font-size: 1.6rem; font-weight: 800; line-height: 1;
    letter-spacing: -.02em;
}
.stat-lbl {
    font-size: .62rem; text-transform: uppercase;
    letter-spacing: .07em; color: var(--bs-secondary-color);
    margin-top: 3px;
}

/* ── BADGE / PILL ───────────────────────────────────────────── */
.streak-pill {
    background: rgba(245,158,11,.12); border: 1px solid rgba(245,158,11,.3);
    color: var(--yellow); border-radius: 99px; padding: 3px 12px;
    font-size: .78rem; font-weight: 600; white-space: nowrap;
}
.sr-badge {
    background: rgba(124,92,191,.15); color: #a78bfa;
    border: 1px solid rgba(124,92,191,.3);
    border-radius: 99px; padding: 1px 9px; font-size: .68rem;
}
.model-badge {
    font-size: .62rem; padding: 2px 7px; border-radius: 4px;
    background: var(--bs-tertiary-bg); color: var(--bs-secondary-color);
}
.cached-ok { color: var(--green); font-size: .72rem; }

/* ── BUTTONS / TOUCH ────────────────────────────────────────── */
.touch-btn { min-height: 44px; min-width: 44px; }
.btn {
    font-weight: 500; border-radius: 10px !important;
    transition: .15s ease !important;
}
.btn-primary {
    background: linear-gradient(135deg, var(--brand), #3b7de8) !important;
    border: none !important; box-shadow: 0 2px 8px rgba(79,142,247,.3) !important;
}
.btn-primary:hover {
    background: linear-gradient(135deg, #3b7de8, #2563eb) !important;
    box-shadow: 0 4px 16px rgba(79,142,247,.4) !important;
    transform: translateY(-1px);
}
.btn-warning {
    background: linear-gradient(135deg, var(--yellow), #d97706) !important;
    border: none !important; color: #1a1a1a !important;
}

/* ── CATEGORY CHIPS ─────────────────────────────────────────── */
.cat-chip {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 5px 12px; border-radius: 20px; font-size: .76rem;
    border: 1.5px solid var(--bs-border-color);
    background: var(--bs-tertiary-bg);
    color: var(--bs-secondary-color);
    cursor: pointer; transition: .12s; user-select: none;
}
.cat-chip:hover { border-color: var(--brand); color: var(--brand); }
.cat-chip.active {
    border-color: var(--brand);
    background: rgba(79,142,247,.1);
    color: var(--brand); font-weight: 500;
}

/* ── TTS BUTTON ─────────────────────────────────────────────── */
.tts-btn { padding: 4px 8px; line-height: 1; border-radius: 6px; }
.tts-btn.active {
    background: var(--brand); color: #fff; border-color: var(--brand);
}
.tts-btn i { font-size: .9rem; }

/* ── GLOSSAR ────────────────────────────────────────────────── */
.gloss-card {
    border: 1px solid var(--bs-border-color); border-radius: 12px;
    overflow: hidden; margin-bottom: 10px; transition: .15s;
    background: var(--bs-body-bg);
}
.gloss-card:hover {
    border-color: var(--brand);
    box-shadow: 0 2px 16px rgba(79,142,247,.1);
    transform: translateY(-1px);
}
.gloss-header {
    display: flex; align-items: center; gap: 10px; padding: 14px 18px;
    cursor: pointer; user-select: none;
}
.gloss-term { font-weight: 700; font-size: .95rem; flex-grow: 1; }
.gloss-short { font-size: .8rem; color: var(--bs-secondary-color); margin-top: 2px; }
.gloss-body {
    display: none; padding: 0 18px 18px;
    border-top: 1px solid var(--bs-border-color);
    background: rgba(79,142,247,.03);
    font-size: .88rem; line-height: 1.75;
}
.gloss-body.open { display: block; }
.gloss-body strong { color: var(--bs-emphasis-color); }
.gloss-body ul { padding-left: 0; list-style: none; }
.gloss-body ul li { padding: 2px 0 2px 14px; position: relative; }
.gloss-body ul li::before {
    content: '›'; position: absolute; left: 0;
    color: var(--brand); font-weight: 700;
}

/* ── ALPHABET NAV ───────────────────────────────────────────── */
.alpha-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.alpha-btn {
    width: 30px; height: 30px; border-radius: 7px;
    border: 1px solid var(--bs-border-color);
    background: var(--bs-tertiary-bg); font-size: .75rem; font-weight: 600;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: .12s;
}
.alpha-btn:hover { background: rgba(79,142,247,.1); border-color: var(--brand); }
.alpha-btn.active { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ── CATEGORY TREE ──────────────────────────────────────────── */
.cat-tree-item {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 10px 8px 22px;
    border-radius: 8px; cursor: pointer; font-size: .8rem; transition: .12s;
    min-height: 40px;
}
.cat-tree-item:hover   { background: var(--bs-tertiary-bg); }
.cat-tree-item.active  {
    background: rgba(79,142,247,.1); color: var(--brand); font-weight: 500;
}
.cat-tree-group-header {
    display: flex; align-items: center; gap: 8px; padding: 8px 10px;
    border-radius: 8px; cursor: pointer; font-size: .8rem; font-weight: 600;
    color: var(--bs-secondary-color); transition: .12s; min-height: 40px;
}
.cat-tree-group-header:hover { background: var(--bs-tertiary-bg); color: var(--bs-body-color); }
.cat-tree-children { display: none; }
.cat-tree-children.open { display: block; }

/* ── STATUS DOT ─────────────────────────────────────────────── */
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }

/* ── ANIMATIONS ─────────────────────────────────────────────── */
@keyframes fadein {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: none; }
}
.fade-in { animation: fadein .2s ease; }

/* ── SCROLLBAR ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bs-border-color); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--bs-secondary-color); }

/* ── FORM ELEMENTS ──────────────────────────────────────────── */
.form-control, .form-select {
    border-radius: 10px !important;
    border: 1.5px solid var(--bs-border-color) !important;
    transition: .15s !important;
}
.form-control:focus, .form-select:focus {
    border-color: var(--brand) !important;
    box-shadow: 0 0 0 3px rgba(79,142,247,.15) !important;
}
.input-group .form-control { border-radius: 0 !important; }
.input-group .form-control:first-child { border-radius: 10px 0 0 10px !important; }
.input-group .form-control:last-child  { border-radius: 0 10px 10px 0 !important; }

/* ── ALERTS ─────────────────────────────────────────────────── */
.alert { border-radius: var(--radius) !important; border: none !important;
    box-shadow: var(--shadow); }

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 575px) {
    .container-xl { padding-left: 12px; padding-right: 12px; }
    h5 { font-size: 1rem; }
    .stat-val { font-size: 1.35rem; }
}