:root {
    --bg-light: #f0f2f5;
    --text-light: #1a1a2e;
    --card-bg-light: rgba(255, 255, 255, 0.75);
    --border-light: rgba(255, 255, 255, 0.6);

    --bg-dark: #0d0d1a;
    --text-dark: #e8eaf6;
    --card-bg-dark: rgba(22, 22, 42, 0.8);
    --border-dark: rgba(255, 255, 255, 0.08);

    --primary: #6366f1;
    --secondary: #a855f7;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
}

/* ── Base ─────────────────────────────────────────────── */
body {
    background-color: var(--bg-light);
    background-image:
        radial-gradient(ellipse 80% 50% at 20% -10%, rgba(99, 102, 241, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(168, 85, 247, 0.06), transparent);
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

body.dark-mode {
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(ellipse 80% 50% at 20% -10%, rgba(99, 102, 241, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(168, 85, 247, 0.08), transparent);
    color: var(--text-dark);
}

/* ── Glassmorphism Card ───────────────────────────────── */
.glass-card {
    background: var(--card-bg-light);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: 18px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.08);
    transition: all 0.3s ease;
}

body.dark-mode .glass-card {
    background: var(--card-bg-dark);
    border: 1px solid var(--border-dark);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

/* ── Sidebar ──────────────────────────────────────────── */
.sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: 252px;
    padding-top: 24px;
    z-index: 1000;
    border-radius: 0 !important;
    display: flex;
    flex-direction: column;
}

.main-content {
    margin-left: 252px;
    padding: 28px 32px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
}

/* ── Nav Links ────────────────────────────────────────── */
.nav-link {
    color: var(--text-light);
    font-weight: 500;
    padding: 10px 16px;
    margin: 3px 8px;
    border-radius: 10px;
    transition: all 0.25s;
    font-size: 0.9rem;
}

body.dark-mode .nav-link {
    color: var(--text-dark);
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ── Gradient Text ────────────────────────────────────── */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Progress Bar ─────────────────────────────────────── */
.progress {
    height: 22px;
    border-radius: 12px;
    background-color: rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

body.dark-mode .progress {
    background-color: rgba(255, 255, 255, 0.08);
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transition: width 0.4s ease;
    border-radius: 12px;
}

/* ── Fade In Animation ────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* ── Table Dark Mode ──────────────────────────────────── */
body.dark-mode .table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-dark);
    --bs-table-border-color: rgba(255, 255, 255, 0.08);
    --bs-table-hover-bg: rgba(99, 102, 241, 0.1);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.03);
    --bs-table-active-bg: rgba(99, 102, 241, 0.12);
    color: var(--text-dark);
}

body.dark-mode .table > :not(caption) > * > * {
    background-color: transparent;
    color: var(--text-dark);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: none;
}

body.dark-mode .table thead th {
    color: rgba(232, 234, 246, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.12);
    background-color: rgba(255, 255, 255, 0.04);
}

body.dark-mode .table-striped > tbody > tr:nth-of-type(odd) > * {
    color: var(--text-dark);
    background-color: rgba(255, 255, 255, 0.03);
}

body.dark-mode .table-hover > tbody > tr:hover > * {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--text-dark);
}

body.dark-mode .table .text-muted {
    color: rgba(232, 234, 246, 0.55) !important;
}

/* ── Form Dark Mode ───────────────────────────────────── */
body.dark-mode .form-control,
body.dark-mode .input-group-text {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--text-dark);
}

body.dark-mode .form-control::placeholder {
    color: rgba(232, 234, 246, 0.42);
    opacity: 1;
}

body.dark-mode .form-control:focus {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: var(--primary);
}

body.dark-mode .input-group-text {
    color: rgba(232, 234, 246, 0.55);
}

body.dark-mode .text-muted {
    color: rgba(232, 234, 246, 0.58) !important;
}

body.dark-mode .badge.bg-light,
body.dark-mode .badge.bg-light.text-dark {
    background-color: rgba(255, 255, 255, 0.12) !important;
    color: var(--text-dark) !important;
    border: 1px solid rgba(255, 255, 255, 0.14);
}

body.dark-mode .btn-outline-secondary {
    color: rgba(232, 234, 246, 0.8);
    border-color: rgba(255, 255, 255, 0.2);
}

body.dark-mode .btn-outline-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: #fff;
}

body.dark-mode .form-check-input {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.25);
}

body.dark-mode .form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

body.dark-mode hr {
    border-color: rgba(255, 255, 255, 0.1);
    opacity: 1;
}

/* ── Badge improvements ───────────────────────────────── */
.badge {
    font-weight: 600;
    letter-spacing: 0.03em;
}

/* ── Input focus glow ─────────────────────────────────── */
.form-control:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
    border-color: var(--primary);
    outline: none;
}

/* ── Scrollbar ────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99,102,241,0.6); }

/* ── Engine badge (sidebar) ───────────────────────────── */
.engine-badge,
.ai-badge {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
    letter-spacing: 0.08em;
    display: inline-block;
}

/* ── Login page background ────────────────────────────── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a3e 40%, #312e81 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    pointer-events: none;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(168,85,247,0.12) 0%, transparent 70%);
    bottom: -100px;
    left: -80px;
    pointer-events: none;
}

/* ── Engine status indicator ──────────────────────────── */
.engine-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
}

.engine-status.online {
    background: rgba(40,167,69,0.12);
    color: #28a745;
    border: 1px solid rgba(40,167,69,0.3);
}

.engine-status.offline {
    background: rgba(220,53,69,0.12);
    color: #dc3545;
    border: 1px solid rgba(220,53,69,0.3);
}

.engine-status .status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
}

.engine-status.online .status-dot {
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ── Engine stack (settings) ─────────────────────────── */
.engine-stack-card {
    padding: 16px 18px;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: rgba(0, 0, 0, 0.02);
}

body.dark-mode .engine-stack-card {
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
}

.engine-stack-card.active-engine {
    border-color: rgba(40, 167, 69, 0.35);
    background: rgba(40, 167, 69, 0.06);
}

.engine-compare-table th {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Brand / favicon sidebar ─────────────────────────── */
.sidebar-brand {
    padding: 0 12px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 12px;
    transition: background 0.2s;
}

.brand-link:hover {
    background: rgba(99, 102, 241, 0.08);
}

.brand-icon {
    flex-shrink: 0;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.brand-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    min-width: 0;
}

.brand-title {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.brand-badge {
    font-size: 0.62rem !important;
    padding: 2px 8px !important;
}

.sidebar-footer {
    margin-top: auto;
    padding: 12px 16px 20px;
    border-top: 1px solid rgba(99, 102, 241, 0.12);
}

body.dark-mode .sidebar-footer {
    border-top-color: rgba(255, 255, 255, 0.08);
}

.sidebar nav {
    flex: 1;
}

/* ── Page header ─────────────────────────────────────── */
.page-header {
    margin-bottom: 1.75rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(99, 102, 241, 0.12);
}

body.dark-mode .page-header {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.page-header h2 {
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.35rem;
}

.page-header .page-subtitle {
    color: #64748b;
    margin: 0;
    font-size: 0.95rem;
}

body.dark-mode .page-header .page-subtitle {
    color: rgba(232, 234, 246, 0.65);
}

/* ── Buttons ─────────────────────────────────────────── */
.btn-brand {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: #fff !important;
    font-weight: 700;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    transition: transform 0.15s, box-shadow 0.15s;
}

.btn-brand:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
    color: #fff !important;
}

.input-group .btn-brand {
    border-radius: 0 10px 10px 0;
}

.login-brand-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(99, 102, 241, 0.45);
    margin-bottom: 1rem;
}

/* ── History / jobs toolbar ───────────────────────────── */
.history-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 1rem;
}

.history-toolbar .btn {
    font-size: 0.85rem;
    font-weight: 600;
}

.section-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}