/* ═══════════════════════════════════════════
   AI Question Validator — Global Stylesheet
   ═══════════════════════════════════════════ */

/* ── CSS Custom Properties ── */
:root {
    --sidebar-w: 248px;
    --sb-bg: #0d1117;
    --accent: #6366f1;
    --accent2: #8b5cf6;
    --body-bg: #f0f2f7;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.04);
    --shadow-lg: 0 10px 40px rgba(0,0,0,.1);
    --radius: 14px;
    --radius-sm: 8px;
}
[data-theme="dark"] {
    --body-bg: #0d1117;
    --card-bg: #161b22;
    --text-main: #e6edf3;
    --text-muted: #8b949e;
    --border: #30363d;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,.3);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--body-bg);
    color: var(--text-main);
    min-height: 100vh;
    font-size: 14px;
    line-height: 1.5;
    transition: background .25s, color .25s;
    -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 4px; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #30363d; }

/* ═══════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════ */
#sidebar {
    position: fixed; top: 0; left: 0;
    width: var(--sidebar-w); height: 100vh;
    background: var(--sb-bg);
    display: flex; flex-direction: column;
    z-index: 1000; overflow: hidden;
    transition: transform .3s cubic-bezier(.4,0,.2,1);
}
#sidebar::before {
    content: '';
    position: absolute; top: -60px; right: -60px;
    width: 200px; height: 200px; border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,.15) 0%, transparent 70%);
    pointer-events: none;
}
.sb-brand {
    padding: 20px 18px 16px;
    border-bottom: 1px solid rgba(255,255,255,.06);
    flex-shrink: 0;
}
.sb-logo {
    width: 38px; height: 38px; border-radius: 10px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: #fff; flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(99,102,241,.4);
}
.sb-brand-name { font-size: .95rem; font-weight: 700; color: #e6edf3; letter-spacing: -.3px; }
.sb-brand-sub  { font-size: .68rem; color: #484f58; margin-top: 1px; }
.sb-section {
    padding: 20px 12px 4px;
    font-size: .65rem; font-weight: 700; color: #484f58;
    text-transform: uppercase; letter-spacing: .1em; flex-shrink: 0;
}
.sb-nav { flex: 1; overflow-y: auto; padding-bottom: 8px; }
.sb-nav::-webkit-scrollbar { display: none; }
.sb-link {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 12px; margin: 1px 8px; border-radius: var(--radius-sm);
    color: #8b949e; font-size: .84rem; font-weight: 500;
    text-decoration: none; transition: all .15s;
    border-left: 2px solid transparent;
}
.sb-link i { width: 18px; text-align: center; font-size: .95rem; flex-shrink: 0; }
.sb-link:hover { background: rgba(255,255,255,.05); color: #e6edf3; }
.sb-link.active {
    background: rgba(99,102,241,.15); color: #fff;
    border-left-color: #6366f1;
}
.sb-link.active i { color: #a5b4fc; }
.sb-provider {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 12px; margin: 1px 8px; border-radius: var(--radius-sm);
}
.sb-provider-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.dot-openai { background: #10b981; }
.dot-gemini { background: #3b82f6; }
.dot-claude { background: #f59e0b; }
.dot-off    { background: #484f58; }
.sb-provider-name { font-size: .78rem; color: #6e7681; flex: 1; }
.sb-provider-badge {
    font-size: .62rem; font-weight: 700; padding: 1px 6px; border-radius: 10px;
}
.badge-active { background: rgba(16,185,129,.15); color: #34d399; }
.badge-nokey  { background: rgba(239,68,68,.12);  color: #f87171; }
.sb-footer { padding: 12px; border-top: 1px solid rgba(255,255,255,.06); flex-shrink: 0; }
.sb-user-avatar {
    width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .75rem;
}
.sb-user-name { font-size: .78rem; font-weight: 600; color: #e6edf3; }
.sb-user-role { font-size: .68rem; color: #6e7681; text-transform: uppercase; letter-spacing: .02em; }
.sb-footer .btn-icon-sm { border-color: rgba(255,255,255,.1); color: #8b949e; }
.sb-footer .btn-icon-sm:hover { background: rgba(255,255,255,.08); }
.sb-theme-btn {
    width: 100%; display: flex; align-items: center; gap: 8px;
    padding: 8px 10px; border-radius: var(--radius-sm);
    background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.06);
    color: #6e7681; font-size: .78rem; font-weight: 500; cursor: pointer;
    transition: all .15s;
}
.sb-theme-btn:hover { background: rgba(255,255,255,.08); color: #8b949e; }

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */
#mainWrap { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }
#topbar {
    position: sticky; top: 0; z-index: 900;
    background: rgba(240,242,247,.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 28px; height: 58px;
    display: flex; align-items: center; justify-content: space-between;
    transition: background .25s;
}
[data-theme="dark"] #topbar { background: rgba(13,17,23,.9); }
.topbar-title { font-size: .95rem; font-weight: 700; color: var(--text-main); }
.topbar-right { display: flex; align-items: center; gap: 10px; }
#pageContent { padding: 24px 28px; flex: 1; }

/* ═══════════════════════════════════════════
   CARDS
   ═══════════════════════════════════════════ */
.card {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow-sm);
    transition: background .25s, border .25s, box-shadow .2s;
}
.card-lift { cursor: pointer; }
.card-lift:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); transition: all .2s ease; }

/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */
.btn-primary-grad {
    display: inline-flex; align-items: center; gap: 6px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border: none; color: #fff; font-weight: 600; font-size: .83rem;
    border-radius: var(--radius-sm); cursor: pointer;
    box-shadow: 0 2px 8px rgba(99,102,241,.35);
    transition: all .2s; text-decoration: none;
}
.btn-primary-grad:hover {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    box-shadow: 0 4px 14px rgba(99,102,241,.45);
    color: #fff; transform: translateY(-1px);
}
.btn-sm-pad { padding: 7px 14px; }
.btn-icon-sm {
    width: 34px; height: 34px; border-radius: var(--radius-sm);
    background: transparent; border: 1px solid var(--border);
    color: var(--text-muted); cursor: pointer; font-size: 1.1rem;
    display: inline-flex; align-items: center; justify-content: center;
}

/* Bootstrap btn overrides */
.btn { border-radius: var(--radius-sm); font-weight: 600; font-size: .83rem; transition: all .15s; }
.btn-primary {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border: none; color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    box-shadow: 0 4px 14px rgba(99,102,241,.45);
    color: #fff; transform: translateY(-1px);
}
.btn-ghost {
    background: transparent; border: 1px solid var(--border); color: var(--text-muted);
}
.btn-ghost:hover { background: var(--border); color: var(--text-main); }

/* ═══════════════════════════════════════════
   FORMS
   ═══════════════════════════════════════════ */
.form-control, .form-select {
    border: 1.5px solid var(--border); border-radius: var(--radius-sm);
    background: var(--card-bg); color: var(--text-main);
    font-size: .85rem; transition: border .15s, box-shadow .15s; padding: 9px 12px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--accent); outline: none;
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
    background: var(--card-bg); color: var(--text-main);
}
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select { background: #0d1117; color: #e6edf3; }
.form-label { font-size: .8rem; font-weight: 600; color: var(--text-muted); margin-bottom: 5px; display: block; }

/* ═══════════════════════════════════════════
   ALERTS
   ═══════════════════════════════════════════ */
.alert-success-app {
    display: flex; align-items: center; gap: 8px;
    background: #d1fae5; border: 1px solid #6ee7b7;
    border-radius: var(--radius-sm); color: #065f46; padding: 10px 14px; font-size: .84rem;
}
.alert-error-app {
    display: flex; align-items: center; gap: 8px;
    background: #fee2e2; border: 1px solid #fca5a5;
    border-radius: var(--radius-sm); color: #991b1b; padding: 10px 14px; font-size: .84rem;
}

/* ═══════════════════════════════════════════
   SPINNER
   ═══════════════════════════════════════════ */
#spinnerOverlay {
    position: fixed; inset: 0; z-index: 9999;
    background: rgba(0,0,0,.6); backdrop-filter: blur(6px);
    display: none; flex-direction: column;
    align-items: center; justify-content: center; gap: 20px;
}
#spinnerOverlay.show { display: flex; }
.spin-ring {
    width: 52px; height: 52px; border-radius: 50%;
    border: 3px solid rgba(255,255,255,.15);
    border-top-color: #6366f1; border-right-color: #8b5cf6;
    animation: spin .75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#spinnerText { color: rgba(255,255,255,.9); font-size: .95rem; font-weight: 500; text-align: center; max-width: 260px; }

/* ═══════════════════════════════════════════
   TOASTS
   ═══════════════════════════════════════════ */
#toastStack { position: fixed; bottom: 24px; right: 24px; z-index: 11000; display: flex; flex-direction: column; gap: 8px; }
.app-toast {
    min-width: 260px; max-width: 340px; padding: 12px 16px; border-radius: 10px;
    display: flex; align-items: flex-start; gap: 10px;
    animation: toastIn .25s cubic-bezier(.34,1.56,.64,1);
    box-shadow: 0 8px 24px rgba(0,0,0,.2);
    font-size: .84rem; font-weight: 500; color: #fff;
}
.toast-success { background: linear-gradient(135deg, #059669, #10b981); }
.toast-error   { background: linear-gradient(135deg, #dc2626, #ef4444); }
.toast-info    { background: linear-gradient(135deg, #0284c7, #0ea5e9); }
.app-toast i   { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
@keyframes toastIn { from { opacity:0; transform:translateY(12px) scale(.96); } to { opacity:1; transform:translateY(0) scale(1); } }

/* ═══════════════════════════════════════════
   SIDEBAR BACKDROP (mobile)
   ═══════════════════════════════════════════ */
#sbBackdrop {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,.5); z-index: 999;
    backdrop-filter: blur(2px);
}

/* ═══════════════════════════════════════════
   CONFIDENCE BAR
   ═══════════════════════════════════════════ */
.conf-track { height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.conf-fill  { height: 100%; border-radius: 3px; width: 0; transition: width .8s cubic-bezier(.4,0,.2,1); }
.conf-accent { background: linear-gradient(90deg, #6366f1, #8b5cf6); }

/* ═══════════════════════════════════════════
   DASHBOARD — STAT CARDS
   ═══════════════════════════════════════════ */
.stat-card { position: relative; overflow: hidden; border: none; }
.stat-blob {
    position: absolute; top: -20px; right: -20px;
    width: 90px; height: 90px; border-radius: 50%; opacity: .12;
}
.stat-icon {
    width: 42px; height: 42px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.stat-icon i { color: #fff; font-size: 1.1rem; }

/* Dashboard batch cards */
.accent-strip { height: 4px; }
.batch-icon {
    width: 36px; height: 36px; border-radius: 9px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.batch-icon i { color: #fff; font-size: .9rem; }
.empty-icon-wrap {
    width: 64px; height: 64px; border-radius: 16px;
    background: linear-gradient(135deg, #eef2ff, #ede9fe);
    margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
}

/* ═══════════════════════════════════════════
   GRADIENT COLOUR CLASSES (no Blade)
   ═══════════════════════════════════════════ */
.grad-indigo { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.grad-blue   { background: linear-gradient(135deg, #0ea5e9, #06b6d4); }
.grad-green  { background: linear-gradient(135deg, #10b981, #34d399); }
.grad-amber  { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.grad-openai { background: linear-gradient(135deg, #10b981, #34d399); }
.grad-gemini { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.grad-claude { background: linear-gradient(135deg, #f59e0b, #fbbf24); }

.blob-indigo { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.blob-blue   { background: linear-gradient(135deg, #0ea5e9, #06b6d4); }
.blob-green  { background: linear-gradient(135deg, #10b981, #34d399); }
.blob-amber  { background: linear-gradient(135deg, #f59e0b, #fbbf24); }

.strip-openai { background: linear-gradient(90deg, #10b981, #34d399); }
.strip-gemini { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.strip-claude { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.strip-indigo { background: linear-gradient(90deg, #6366f1, #8b5cf6); }

.btn-result-openai { background: linear-gradient(135deg, #10b981, #34d399); color: #fff; border: none; }
.btn-result-gemini { background: linear-gradient(135deg, #3b82f6, #60a5fa); color: #fff; border: none; }
.btn-result-claude { background: linear-gradient(135deg, #f59e0b, #fbbf24); color: #fff; border: none; }
.btn-result-openai:hover, .btn-result-gemini:hover, .btn-result-claude:hover { color: #fff; filter: brightness(1.08); }

/* Colour accents for consensus */
.cleft-green  { border-left: 3px solid #22c55e; }
.cleft-orange { border-left: 3px solid #f97316; }
.cleft-yellow { border-left: 3px solid #eab308; }
.cleft-red    { border-left: 3px solid #ef4444; }

.cfill-green  { background: #22c55e; }
.cfill-orange { background: #f97316; }
.cfill-yellow { background: #eab308; }
.cfill-red    { background: #ef4444; }

.mini-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.dot-green  { background: #22c55e; }
.dot-orange { background: #f97316; }
.dot-yellow { background: #eab308; }
.dot-red    { background: #ef4444; }

.num-green  { color: #22c55e; font-size: 1rem; font-weight: 700; }
.num-orange { color: #f97316; font-size: 1rem; font-weight: 700; }
.num-yellow { color: #eab308; font-size: 1rem; font-weight: 700; }
.num-red    { color: #ef4444; font-size: 1rem; font-weight: 700; }

.qa-answer-green  { background: #f0fdf4; border-left: 3px solid #22c55e; }
.qa-answer-orange { background: #fff7ed; border-left: 3px solid #f97316; }
.qa-answer-yellow { background: #fefce8; border-left: 3px solid #eab308; }
.qa-answer-red    { background: #fef2f2; border-left: 3px solid #ef4444; }
[data-theme="dark"] .qa-answer-green  { background: #14532d22; }
[data-theme="dark"] .qa-answer-orange { background: #43140722; }
[data-theme="dark"] .qa-answer-yellow { background: #78350f22; }
[data-theme="dark"] .qa-answer-red    { background: #7f1d1d22; }

.lbl-green  { color: #166534; } .lbl-orange { color: #9a3412; }
.lbl-yellow { color: #854d0e; } .lbl-red    { color: #991b1b; }
.txt-green  { color: #166534; } .txt-orange { color: #9a3412; }
.txt-yellow { color: #854d0e; } .txt-red    { color: #991b1b; }
[data-theme="dark"] .lbl-green, [data-theme="dark"] .txt-green  { color: #86efac; }
[data-theme="dark"] .lbl-orange,[data-theme="dark"] .txt-orange { color: #fdba74; }
[data-theme="dark"] .lbl-yellow,[data-theme="dark"] .txt-yellow { color: #fde68a; }
[data-theme="dark"] .lbl-red,   [data-theme="dark"] .txt-red    { color: #fca5a5; }

/* ═══════════════════════════════════════════
   GENERATE PAGE
   ═══════════════════════════════════════════ */
.step-num {
    width: 28px; height: 28px; border-radius: 8px;
    background: #eef2ff; color: #6366f1;
    display: flex; align-items: center; justify-content: center;
    font-size: .78rem; font-weight: 800; flex-shrink: 0;
}
[data-theme="dark"] .step-num { background: rgba(49,46,129,.3); color: #a5b4fc; }

.diff-group { display: flex; gap: 8px; }
.diff-opt { flex: 1; text-align: center; }
.diff-opt input { display: none; }
.diff-btn {
    display: block; padding: 8px 6px; border-radius: var(--radius-sm);
    font-size: .78rem; font-weight: 700; cursor: pointer;
    border: 2px solid var(--border); transition: all .15s; user-select: none;
}
.diff-btn-easy   { background: #f0fdf4; color: #166534; }
.diff-btn-medium { background: #fefce8; color: #854d0e; }
.diff-btn-hard   { background: #fef2f2; color: #991b1b; }
[data-theme="dark"] .diff-btn-easy   { background: rgba(20,83,45,.2);  color: #86efac; }
[data-theme="dark"] .diff-btn-medium { background: rgba(120,53,15,.2); color: #fde68a; }
[data-theme="dark"] .diff-btn-hard   { background: rgba(127,29,29,.2); color: #fca5a5; }
.diff-opt input:checked + .diff-btn { box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.diff-opt input:checked + .diff-btn-easy   { border-color: #22c55e; }
.diff-opt input:checked + .diff-btn-medium { border-color: #eab308; }
.diff-opt input:checked + .diff-btn-hard   { border-color: #ef4444; }

.count-wrap { display: flex; align-items: center; gap: 12px; }
.count-badge {
    min-width: 40px; height: 32px; border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff; font-weight: 800; font-size: .88rem;
    display: flex; align-items: center; justify-content: center;
}
.form-range { accent-color: #6366f1; }

.settings-top-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(180px, .6fr);
    gap: 18px;
    align-items: end;
}
.settings-control { min-width: 0; }
.settings-control-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: 10px; margin-bottom: 7px;
}
.count-badge-lg { min-width: 50px; height: 34px; font-size: .92rem; }
.count-input {
    max-width: 220px;
    font-weight: 700;
}

.difficulty-mixer {
    margin-top: 18px; padding-top: 16px;
    border-top: 1px solid var(--border);
}
.difficulty-mixer-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap; margin-bottom: 10px;
}
.difficulty-total-pill {
    min-width: 72px; height: 30px; border-radius: var(--radius-sm);
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: .78rem; font-weight: 800;
}
.difficulty-total-pill.total-ok { background: linear-gradient(135deg, #10b981, #34d399); }
.difficulty-total-pill.total-bad { background: linear-gradient(135deg, #ef4444, #f97316); }

.mix-preset-row {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: 12px;
}
.mix-preset {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    min-height: 34px; padding: 7px 10px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--card-bg);
    color: var(--text-muted); font-size: .78rem; font-weight: 700;
    cursor: pointer; transition: all .15s;
}
.mix-preset:hover { color: var(--text-main); border-color: #c7d2fe; background: #f8fafc; }
.mix-preset.active {
    color: #4f46e5; border-color: #6366f1; background: #eef2ff;
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}
[data-theme="dark"] .mix-preset:hover { background: #0d1117; border-color: #4f46e5; }
[data-theme="dark"] .mix-preset.active { background: rgba(49,46,129,.35); color: #c4b5fd; }

.difficulty-bar {
    height: 8px; border-radius: 999px; overflow: hidden;
    display: flex; background: var(--border); margin-bottom: 14px;
}
.difficulty-bar span { height: 100%; transition: width .2s ease; }
.bar-easy { background: #22c55e; }
.bar-medium { background: #eab308; }
.bar-hard { background: #ef4444; }

.difficulty-stack { display: grid; gap: 10px; }
.difficulty-row {
    display: grid;
    grid-template-columns: minmax(112px, 140px) minmax(0, 1fr) 92px;
    gap: 12px; align-items: center;
}
.level-label {
    display: grid; grid-template-columns: 10px minmax(0, 1fr) auto;
    gap: 8px; align-items: center; min-width: 0;
    color: var(--text-main); font-size: .82rem; font-weight: 700;
}
.level-label strong {
    color: var(--text-muted); font-size: .72rem; white-space: nowrap;
}
.level-dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-easy { background: #22c55e; }
.dot-medium { background: #eab308; }
.dot-hard { background: #ef4444; }

.percent-field { position: relative; }
.percent-field input {
    height: 36px; padding-right: 28px; text-align: right;
    font-weight: 800;
}
.percent-field span {
    position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
    color: var(--text-muted); font-size: .78rem; font-weight: 700;
    pointer-events: none;
}

.provider-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.p-card {
    border: 2px solid var(--border); border-radius: 12px;
    padding: 16px 12px; cursor: pointer; text-align: center;
    transition: all .2s; position: relative; overflow: hidden;
    background: var(--card-bg);
}
.p-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    opacity: 0; transition: opacity .2s;
}
.p-card.sel::before { opacity: 1; }
.p-openai::before { background: linear-gradient(90deg, #10b981, #34d399); }
.p-gemini::before { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.p-claude::before { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.p-card.sel.p-openai { border-color: #10b981; }
.p-card.sel.p-gemini { border-color: #3b82f6; }
.p-card.sel.p-claude { border-color: #f59e0b; }
.p-icon {
    width: 40px; height: 40px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; margin: 0 auto 8px;
}
.p-icon-openai { background: linear-gradient(135deg, #10b981, #34d399); color: #fff; }
.p-icon-gemini { background: linear-gradient(135deg, #3b82f6, #60a5fa); color: #fff; }
.p-icon-claude { background: linear-gradient(135deg, #f59e0b, #fbbf24); color: #fff; }
.p-name  { font-size: .84rem; font-weight: 700; color: var(--text-main); }
.p-model { font-size: .7rem; color: var(--text-muted); margin-top: 2px; }
.p-badge { display: inline-block; font-size: .65rem; font-weight: 700; padding: 2px 7px; border-radius: 10px; margin-top: 6px; }
.p-badge-ready { background: #dcfce7; color: #166534; }
.p-badge-nokey { background: #fee2e2; color: #991b1b; }
[data-theme="dark"] .p-badge-ready { background: rgba(20,83,45,.4);  color: #86efac; }
[data-theme="dark"] .p-badge-nokey { background: rgba(127,29,29,.4); color: #fca5a5; }

.btn-generate {
    width: 100%; padding: 14px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border: none; border-radius: 12px; color: #fff;
    font-size: 1rem; font-weight: 700; cursor: pointer;
    box-shadow: 0 4px 16px rgba(99,102,241,.35);
    transition: all .2s;
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-generate:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(99,102,241,.45); }
.btn-generate:disabled { opacity: .65; transform: none; cursor: not-allowed; }

/* ═══════════════════════════════════════════
   BATCH PAGE — QUESTION CARDS
   ═══════════════════════════════════════════ */
.batch-header {
    border-radius: var(--radius); overflow: hidden; margin-bottom: 20px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    padding: 28px 24px;
}
.q-num {
    width: 32px; height: 32px; border-radius: 8px;
    background: rgba(99,102,241,.12); color: #6366f1;
    font-size: .8rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
[data-theme="dark"] .q-num { background: rgba(99,102,241,.2); color: #a5b4fc; }
.q-card { border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card-bg); margin-bottom: 10px; overflow: hidden; }
.q-card-header { padding: 14px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.q-card-body { padding: 14px 16px; }
.tag { display: inline-flex; align-items: center; gap: 4px; font-size: .72rem; font-weight: 700; padding: 3px 9px; border-radius: 20px; white-space: nowrap; }
.tag-easy   { background: #dcfce7; color: #166534; }
.tag-medium { background: #fef9c3; color: #854d0e; }
.tag-hard   { background: #fee2e2; color: #991b1b; }
.tag-type   { background: #ede9fe; color: #5b21b6; }
[data-theme="dark"] .tag-easy   { background: rgba(20,83,45,.35);   color: #86efac; }
[data-theme="dark"] .tag-medium { background: rgba(120,53,15,.35);  color: #fde68a; }
[data-theme="dark"] .tag-hard   { background: rgba(127,29,29,.35);  color: #fca5a5; }
[data-theme="dark"] .tag-type   { background: rgba(76,29,149,.35);  color: #c4b5fd; }
.question-source {
    display: flex; align-items: flex-start; gap: 6px;
    margin-top: 7px; padding: 7px 9px;
    border: 1px solid #bae6fd; border-radius: 7px;
    background: #f0f9ff; color: #075985;
    font-size: .76rem; line-height: 1.35;
    max-width: 100%; overflow-wrap: anywhere;
}
.question-source i {
    color: #0284c7; margin-top: 1px; flex-shrink: 0;
}
.question-source strong { font-weight: 800; }
.source-actions {
    display: inline-flex; align-items: center; gap: 8px;
    margin-left: auto; flex-shrink: 0;
}
.source-open-link {
    color: #0369a1; font-weight: 800; text-decoration: none;
    white-space: nowrap;
}
.source-open-link:hover { text-decoration: underline; }
.question-source.compact {
    margin-top: 2px; padding: 0; border: 0; border-radius: 0;
    background: transparent; color: var(--text-muted);
    font-size: .71rem;
}
.question-source.compact i { color: #0284c7; }
.question-preview-stack {
    display: flex; flex-direction: column; gap: 2px;
    min-width: 0; flex: 1;
}
.question-preview-stack .q-text-preview { max-width: 100%; }
[data-theme="dark"] .question-source {
    background: rgba(8,47,73,.35); color: #bae6fd;
    border-color: rgba(14,165,233,.35);
}
[data-theme="dark"] .question-source i,
[data-theme="dark"] .question-source.compact i { color: #7dd3fc; }
[data-theme="dark"] .source-open-link { color: #7dd3fc; }
[data-theme="dark"] .question-source.compact {
    background: transparent; color: var(--text-muted); border-color: transparent;
}
.answer-box {
    background: #f0fdf4; border-left: 3px solid #22c55e;
    border-radius: 0 6px 6px 0; padding: 9px 12px; margin-top: 10px;
}
[data-theme="dark"] .answer-box { background: rgba(20,83,45,.15); }
.answer-label { font-size: .68rem; font-weight: 700; color: #15803d; text-transform: uppercase; letter-spacing: .06em; display: block; margin-bottom: 3px; }
[data-theme="dark"] .answer-label { color: #4ade80; }
.answer-text  { font-size: .87rem; color: #166534; }
[data-theme="dark"] .answer-text  { color: #86efac; }
.btn-icon-action {
    width: 30px; height: 30px; border-radius: 7px;
    border: 1px solid var(--border); background: transparent;
    color: var(--text-muted); cursor: pointer; font-size: .82rem;
    display: inline-flex; align-items: center; justify-content: center;
    transition: all .15s;
}
.btn-icon-action:hover { background: var(--border); color: var(--text-main); }
.btn-icon-action.danger:hover { background: #fee2e2; border-color: #fca5a5; color: #dc2626; }
.btn-validate-main {
    background: #fff; color: #6366f1; border: none;
    border-radius: 9px; padding: 8px 18px;
    font-size: .85rem; font-weight: 700; cursor: pointer;
    transition: all .15s;
}
.btn-validate-main:hover { background: #f0f0ff; transform: translateY(-1px); }
.btn-validate-main:disabled { opacity: .65; transform: none; cursor: not-allowed; }

/* ═══════════════════════════════════════════
   VALIDATION RESULTS PAGE
   ═══════════════════════════════════════════ */
.back-link {
    display: inline-flex; align-items: center; gap: 5px;
    color: var(--text-muted); font-size: .82rem; text-decoration: none;
}
.back-link:hover { color: var(--text-main); }
.stat-lbl { font-size: .75rem; color: var(--text-muted); }
.conf-strip { min-width: 200px; }
.conf-pct-label { font-size: .78rem; font-weight: 700; color: #6366f1; white-space: nowrap; }

.vtab {
    font-size: .82rem; font-weight: 600; color: var(--text-muted);
    border: none; background: none; padding: 8px 16px;
    border-bottom: 2px solid transparent; margin-bottom: -2px;
    border-radius: 0; cursor: pointer; transition: color .15s;
}
.vtab:hover { color: var(--text-main); }
.vtab.vtab-active { color: #6366f1; border-bottom-color: #6366f1; }
.vtab-badge { display: inline-block; border-radius: 10px; font-size: .65rem; padding: 1px 5px; margin-left: 3px; font-weight: 700; }
.vtab-badge.fail { background: #fee2e2; color: #991b1b; }
.vtab-badge.ok   { background: #dcfce7; color: #166534; }
.vtab-badge.skip { background: #f1f5f9; color: #64748b; }

.q-row { background: var(--card-bg); transition: background .15s; }
.q-row:hover { background: rgba(99,102,241,.02); }
.q-row-main {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 14px; cursor: pointer; min-width: 0;
}
.q-text-preview {
    font-size: .83rem; color: var(--text-main);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 440px;
}
.q-row-detail { padding: 0 14px 14px 26px; border-top: 1px dashed var(--border); }
.row-divider  { height: 1px; background: var(--border); }
.detail-qa { background: var(--body-bg); border-left: 3px solid var(--border); border-radius: 0 6px 6px 0; padding: 7px 10px; margin: 8px 0 0; }
.detail-label { font-size: .67rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); margin-bottom: 3px; }
.detail-q { font-size: .85rem; color: var(--text-main); line-height: 1.45; }

.issue-row {
    display: flex; align-items: baseline; flex-wrap: wrap; gap: 5px;
    padding: 7px 10px; border-radius: 7px;
    background: #fff7ed; border: 1px solid #fed7aa;
    margin-bottom: 4px; font-size: .78rem;
}
[data-theme="dark"] .issue-row { background: rgba(67,20,7,.5); border-color: rgba(124,45,18,.4); }
.issue-tag { font-weight: 700; color: #9a3412; white-space: nowrap; }
.issue-type-badge { background: #fed7aa; color: #9a3412; border-radius: 4px; padding: 0 5px; font-weight: 600; white-space: nowrap; }
.issue-detail { color: #7c2d12; flex: 1; min-width: 0; }
[data-theme="dark"] .issue-tag, [data-theme="dark"] .issue-detail { color: #fdba74; }
.issue-fix { display: block; width: 100%; margin-top: 4px; padding: 3px 7px; background: #d1fae5; color: #065f46; border-radius: 4px; font-size: .75rem; }
[data-theme="dark"] .issue-fix { background: rgba(6,78,59,.4); color: #6ee7b7; }

.vpill { font-size: .65rem; font-weight: 700; border-radius: 4px; padding: 2px 6px; white-space: nowrap; }
.vpill-ok   { background: #dcfce7; color: #166534; }
.vpill-fail { background: #fee2e2; color: #991b1b; }
.vpill-skip { background: #f1f5f9; color: #94a3b8; }
[data-theme="dark"] .vpill-ok   { background: rgba(20,83,45,.4);   color: #86efac; }
[data-theme="dark"] .vpill-fail { background: rgba(127,29,29,.4);  color: #fca5a5; }
[data-theme="dark"] .vpill-skip { background: rgba(30,41,59,.6);   color: #64748b; }

.mini-conf-wrap { width: 64px; }
.mini-conf-pct  { font-size: .65rem; color: var(--text-muted); text-align: right; margin-top: 1px; }

.expand-btn {
    width: 24px; height: 24px; border-radius: 6px; flex-shrink: 0;
    border: 1px solid var(--border); background: transparent;
    color: var(--text-muted); cursor: pointer; font-size: .7rem;
    display: inline-flex; align-items: center; justify-content: center;
    transition: transform .2s, border-color .15s, color .15s;
}
.expand-btn.open { transform: rotate(180deg); color: #6366f1; border-color: #6366f1; }

.btn-revalidate-single {
    font-size: .75rem; color: #6366f1; background: transparent;
    border: none; padding: 0; cursor: pointer; font-weight: 600;
    margin-top: 10px; display: inline-flex; align-items: center; gap: 3px;
}
.btn-revalidate-single:hover { text-decoration: underline; }

/* Validator panel (per-AI tab) */
.vp-summary {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 14px; border-radius: var(--radius-sm);
    background: var(--body-bg); margin-bottom: 16px; flex-wrap: wrap; gap: 8px;
}
.vp-issue-card {
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 14px; margin-bottom: 10px; background: var(--card-bg);
}
.vp-q { font-size: .87rem; color: var(--text-main); margin-bottom: 6px; }
.vp-a { font-size: .84rem; color: #15803d; margin-bottom: 8px; }
[data-theme="dark"] .vp-a { color: #4ade80; }
.vp-detail { font-size: .8rem; background: #fff7ed; border-radius: 6px; padding: 7px 10px; color: #7c2d12; }
[data-theme="dark"] .vp-detail { background: rgba(67,20,7,.4); color: #fdba74; }
.vp-fix { font-size: .78rem; background: #d1fae5; border-radius: 6px; padding: 5px 10px; color: #065f46; margin-top: 6px; }
[data-theme="dark"] .vp-fix { background: rgba(6,78,59,.4); color: #6ee7b7; }
.badge-count-ok   { background: #dcfce7; color: #166534; border-radius: 6px; padding: 2px 9px; font-size: .78rem; font-weight: 700; }
.badge-count-fail { background: #fee2e2; color: #991b1b; border-radius: 6px; padding: 2px 9px; font-size: .78rem; font-weight: 700; }

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
/* ═══════════════════════════════════════════
   MCQ ROWS IN VALIDATION RESULTS
   ═══════════════════════════════════════════ */
.mcq-val-row {
    display: flex; align-items: center; gap: 8px;
    padding: 4px 0; font-size: .83rem;
    color: var(--text-main);
}
.mcq-val-correct { font-weight: 700; }
.mcq-val-letter {
    width: 22px; height: 22px; border-radius: 5px; flex-shrink: 0;
    background: var(--border); color: var(--text-muted);
    font-size: .7rem; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
}
.mcq-val-letter-ok { background: #22c55e; color: #fff; }
.mcq-val-text  { flex: 1; }
.mcq-val-check { color: #22c55e; font-size: .85rem; flex-shrink: 0; }
.mcq-val-correct .mcq-val-text { color: #166534; }
[data-theme="dark"] .mcq-val-correct .mcq-val-text { color: #86efac; }

/* ═══════════════════════════════════════════
   BATCH DELETE BUTTON
   ═══════════════════════════════════════════ */
.btn-delete-batch {
    width: 26px; height: 26px; border-radius: 6px; flex-shrink: 0;
    border: 1px solid var(--border); background: transparent;
    color: var(--text-muted); cursor: pointer; font-size: .75rem;
    display: inline-flex; align-items: center; justify-content: center;
    transition: all .15s;
}
.btn-delete-batch:hover {
    background: #fee2e2; border-color: #fca5a5; color: #dc2626;
}
.btn-delete-batch:disabled { opacity: .5; cursor: not-allowed; }

/* ═══════════════════════════════════════════
   MCQ OPTIONS DISPLAY
   ═══════════════════════════════════════════ */
.mcq-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}
.mcq-option {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px; border-radius: var(--radius-sm);
    border: 1.5px solid var(--border);
    background: var(--body-bg);
    transition: border-color .15s;
    position: relative;
}
.mcq-option-correct {
    border-color: #22c55e;
    background: #f0fdf4;
}
[data-theme="dark"] .mcq-option-correct { background: rgba(20,83,45,.15); border-color: #22c55e; }
.mcq-letter {
    width: 26px; height: 26px; border-radius: 6px; flex-shrink: 0;
    background: var(--border); color: var(--text-muted);
    font-size: .75rem; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
}
.mcq-letter-correct { background: #22c55e; color: #fff; }
.mcq-text { font-size: .84rem; color: var(--text-main); flex: 1; line-height: 1.3; }
.mcq-check { color: #22c55e; font-size: .85rem; flex-shrink: 0; }

@media (max-width: 576px) {
    .mcq-options-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
    #sidebar { transform: translateX(-100%); }
    #sidebar.open { transform: translateX(0); box-shadow: 24px 0 60px rgba(0,0,0,.4); }
    #mainWrap { margin-left: 0; }
    #pageContent { padding: 16px; }
    .q-text-preview { max-width: 200px; }
    .settings-top-grid { grid-template-columns: 1fr; }
    .difficulty-row {
        grid-template-columns: 1fr;
        gap: 7px;
        padding: 2px 0 6px;
    }
    .level-label { grid-template-columns: 10px 1fr auto; }
    .percent-field { max-width: 110px; }
    .mix-preset { flex: 1 1 calc(50% - 8px); }
    .provider-grid { grid-template-columns: 1fr; }
}