:root, [data-bs-theme="dark"] {
    --qv-bg: #082429;
    --qv-bg-alt: #0a2e33;
    --qv-surface: #0f3a41;
    --qv-card: #0f3a41;
    --qv-border: rgba(255, 255, 255, .12);
    --qv-accent: #7dcec2;
    --qv-accent-deep: #2a8f86;
    --qv-text: #f5f6f5;
    --qv-muted: #c4cecb;

    --bs-body-bg: #082429;
    --bs-body-color: #f5f6f5;
    --bs-border-color: rgba(255, 255, 255, .12);
    --bs-dark: #0f3a41;
    --bs-dark-rgb: 15, 58, 65;
    --bs-success: #1a6b66;
    --bs-success-rgb: 26, 107, 102;
    --bs-secondary: #c4cecb;
    --bs-secondary-rgb: 196, 206, 203;
}

html { scroll-behavior: smooth; }
body {
    background: var(--qv-bg);
    color: var(--qv-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-feature-settings: 'ss01', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 1rem;
    line-height: 1.55;
}
main { flex: 1; }
h1, .h1, h2, .h2 { font-weight: 700; letter-spacing: -.02em; }
h3, .h3, h4, .h4, h5, .h5 { font-weight: 600; }
.text-secondary { color: var(--qv-muted) !important; }
.text-success { color: var(--qv-accent) !important; }

.btn-success {
    --bs-btn-bg: #fff;
    --bs-btn-border-color: #fff;
    --bs-btn-color: #082429;
    --bs-btn-hover-bg: #7dcec2;
    --bs-btn-hover-border-color: #7dcec2;
    --bs-btn-hover-color: #082429;
    --bs-btn-active-bg: #2a8f86;
    --bs-btn-active-border-color: #2a8f86;
    --bs-btn-active-color: #fff;
    --bs-btn-font-weight: 600;
}
.btn-outline-secondary,
.btn-outline-success,
.btn-outline-light {
    --bs-btn-color: #f5f6f5;
    --bs-btn-border-color: rgba(125, 206, 194, .4);
    --bs-btn-hover-bg: #fff;
    --bs-btn-hover-color: #082429;
    --bs-btn-hover-border-color: #fff;
    --bs-btn-active-bg: #fff;
    --bs-btn-active-color: #082429;
    --bs-btn-active-border-color: #fff;
}

/* Brand */
.brand-mark {
    display: block;
    width: 1.6rem;
    height: 1.6rem;
    color: var(--qv-accent);
    flex-shrink: 0;
}
.navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    color: #232222 !important;
    letter-spacing: -.02em;
}

/* Navbar — white band */
.site-nav {
    background: #fff !important;
    border-bottom: 1px solid #ececea !important;
    min-height: 72px;
}
.site-nav .brand-mark { color: #082429; }
.site-nav .nav-link { color: #232222; font-weight: 500; }
.site-nav .nav-link:hover { color: #082429; }
.site-nav .nav-link.active { color: #1a6b66; font-weight: 700; }
.site-nav .btn-success {
    --bs-btn-bg: #082429;
    --bs-btn-border-color: #082429;
    --bs-btn-color: #fff;
    --bs-btn-hover-bg: #0f3a41;
    --bs-btn-hover-border-color: #0f3a41;
    --bs-btn-hover-color: #fff;
    padding: .45rem 1.05rem;
}
.site-nav .btn-icon {
    background: transparent;
    border: 1.5px solid #b7c4c0;
    color: #232222;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all .15s ease;
}
.site-nav .btn-icon:hover { border-color: #082429; color: #082429; }
.site-nav .navbar-toggler {
    border: 1px solid #082429;
    color: #082429;
    padding: .35rem .7rem;
    display: inline-flex;
    align-items: center;
    gap: .4rem;
}
.site-nav .navbar-toggler:focus { box-shadow: 0 0 0 .2rem rgba(8, 36, 41, .15); }
.site-nav .navbar-toggler-icon {
    width: 1.15rem;
    height: 1.15rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23082429' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.site-nav .navbar-toggler-label {
    font-size: .85rem;
    font-weight: 600;
    color: #082429;
    line-height: 1;
}
@media (max-width: 991.98px) {
    .site-nav .navbar-collapse { padding-top: .35rem; padding-bottom: .75rem; }
    .site-nav .nav-item-cta { width: 100%; margin-top: .35rem; }
    .site-nav .nav-item-cta .btn-success { display: block; width: 100%; text-align: center; margin-left: 0; }
}
@media (min-width: 992px) {
    .site-nav .navbar-toggler { display: none !important; }
    .site-nav .nav-item-cta { margin-left: .5rem; }
}

/* Hero */
.hero-section {
    position: relative;
    padding: 64px 0 56px;
    background:
        radial-gradient(ellipse 55% 42% at 50% -6%, rgba(125, 206, 194, .16), transparent 62%),
        var(--qv-bg);
}
.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.14;
    letter-spacing: -.03em;
    color: #fff;
    margin-bottom: 1.15rem;
}
.hero-title .text-success { color: #9edcd2 !important; }
.hero-lead { max-width: 34rem; font-size: .95rem; line-height: 1.55; }
.hero-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: .42rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .08);
    color: #f5f6f5;
    font-size: .86rem;
    font-weight: 500;
    white-space: nowrap;
}
.hero-chip i { color: var(--qv-accent); font-size: .95rem; }
.hero-actions { justify-content: center; flex-wrap: wrap; }
.hero-actions .btn { min-width: 220px; display: inline-flex; align-items: center; justify-content: center; gap: .4rem; }

/* Cards */
.dashboard-card, .feature-card, .step-card {
    background: var(--qv-card);
    border: 1px solid var(--qv-border);
    border-radius: 14px;
    color: #fff;
    transition: border-color .18s ease, background .18s ease;
}
.dashboard-card { padding: 24px; }
.feature-card, .step-card { padding: 1.75rem 1.4rem; }
.feature-card:hover, .step-card:hover { border-color: rgba(255, 255, 255, .28); }
.feature-card h4, .step-card h5, .dashboard-card h4 { color: #fff; font-weight: 600; }
.feature-card .text-secondary, .step-card .text-secondary, .dashboard-card .text-secondary { color: var(--qv-muted) !important; }
.feature-card p, .step-card p, .dashboard-card p { font-size: .9rem; line-height: 1.5; }
.feature-icon { font-size: 1.85rem; color: var(--qv-accent) !important; }
.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.15rem;
    height: 2.15rem;
    border-radius: 50%;
    background: transparent;
    border: 1.5px solid var(--qv-accent);
    color: var(--qv-accent);
    font-weight: 700;
    font-size: .95rem;
}

/* Forms (dark) */
.form-label { font-size: .9rem; }
.form-control, .form-select {
    background: var(--qv-bg) !important;
    border: 1.5px solid var(--qv-border) !important;
    color: var(--qv-text) !important;
    border-radius: 10px;
    padding: .6rem .9rem;
}
.form-control::placeholder { color: #6b7c78 !important; opacity: 1; }
.form-control:focus, .form-select:focus {
    border-color: var(--qv-accent) !important;
    box-shadow: 0 0 0 .2rem rgba(125, 206, 194, .22);
    background: var(--qv-bg) !important;
    color: var(--qv-text) !important;
}
.form-control:-webkit-autofill,
.form-control:-webkit-autofill:hover,
.form-control:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--qv-text);
    caret-color: var(--qv-text);
    box-shadow: 0 0 0 1000px var(--qv-bg) inset;
    border: 1.5px solid var(--qv-border);
}
.form-check-input {
    background-color: var(--qv-bg);
    border: 1.5px solid var(--qv-border);
}
.form-check-input:checked { background-color: var(--qv-accent-deep); border-color: var(--qv-accent-deep); }
.form-check-input:focus { border-color: var(--qv-accent); box-shadow: 0 0 0 .2rem rgba(125, 206, 194, .22); }

/* Status badges */
.status-badge { padding: 5px 12px; border-radius: 20px; font-size: .8rem; font-weight: 600; white-space: nowrap; }
.status-queued { background: rgba(196, 206, 203, .15); color: var(--qv-muted); border: 1px solid var(--qv-border); }
.status-downloading { background: rgba(125, 206, 194, .15); color: var(--qv-accent); border: 1px solid rgba(125, 206, 194, .4); }
.status-converting { background: rgba(255, 193, 7, .12); color: #ffd76a; border: 1px solid rgba(255, 193, 7, .35); }
.status-finished { background: rgba(40, 167, 69, .15); color: #6ee38a; border: 1px solid rgba(40, 167, 69, .4); }
.status-error { background: rgba(220, 53, 69, .15); color: #ff8b96; border: 1px solid rgba(220, 53, 69, .4); }
.status-cancelled { background: rgba(108, 117, 125, .15); color: #c4cecb; border: 1px solid var(--qv-border); }

/* Queue table */
.queue-table, .hist-table { --bs-table-bg: transparent; --bs-table-color: inherit; }
.queue-table th, .hist-table th {
    color: var(--qv-muted);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-weight: 600;
    border-bottom: 1px solid var(--qv-border) !important;
}
.queue-table td, .hist-table td { vertical-align: middle; border-bottom: 1px solid rgba(255, 255, 255, .06) !important; font-size: .9rem; }
.queue-table tr:hover, .hist-table tr:hover { background: rgba(255, 255, 255, .02); }
.q-title { max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.q-url { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--qv-muted); font-size: .8rem; }
.q-progress { min-width: 140px; }
.q-progress .progress { height: 8px; background: var(--qv-bg); border-radius: 99px; }
.q-progress .progress-bar { background: var(--qv-accent-deep); border-radius: 99px; }
.q-actions { white-space: nowrap; }
.q-actions .btn-icon {
    background: transparent;
    border: 1px solid var(--qv-border);
    color: var(--qv-muted);
    border-radius: 8px;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all .15s ease;
}
.q-actions .btn-icon:hover { border-color: var(--qv-accent); color: var(--qv-accent); }
.q-actions .q-actions .dl-btn,
.q-actions .btn-icon.dl-btn {
    border-color: rgba(125, 206, 194, .5);
    color: var(--qv-accent);
    background: rgba(125, 206, 194, .08);
}
.q-actions .btn-icon.dl-btn:hover { background: var(--qv-accent); border-color: var(--qv-accent); color: #082429; }
.q-actions .btn-icon.btn-danger:hover { border-color: #dc3545; color: #ff8b96; }

/* Config box */
.config-box {
    background: var(--qv-bg);
    border: 1px solid var(--qv-border);
    border-radius: 8px;
    padding: 14px;
    font-family: ui-monospace, 'Courier New', monospace;
    font-size: .82rem;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 260px;
    overflow-y: auto;
    color: var(--qv-muted);
}

/* Alerts */
.alert-success {
    background-color: rgba(15, 58, 65, .75) !important;
    border-color: rgba(125, 206, 194, .35) !important;
    color: #c5e4df !important;
}
.alert-success strong { color: #fff; }
.alert-danger {
    background-color: rgba(60, 18, 24, .7) !important;
    border-color: rgba(220, 53, 69, .4) !important;
    color: #ffb3ba !important;
}

/* Stats row */
.stat-tile {
    background: var(--qv-card);
    border: 1px solid var(--qv-border);
    border-radius: 12px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: .8rem;
}
.stat-tile i { font-size: 1.4rem; color: var(--qv-accent); }
.stat-tile .num { font-size: 1.35rem; font-weight: 700; color: #fff; line-height: 1.1; }
.stat-tile .lbl { font-size: .78rem; color: var(--qv-muted); }

/* Promo banner */
.qd-promo {
    background: linear-gradient(120deg, rgba(125, 206, 194, .12), rgba(15, 58, 65, .6));
    border: 1px solid rgba(125, 206, 194, .3);
    border-left: 3px solid var(--qv-accent);
    border-radius: 12px;
    padding: 1rem 1.25rem;
}
.qd-promo .fw-semibold { color: #fff; font-size: .95rem; }

/* Footer — white band */
.site-footer {
    background: #fff;
    border-top: 1px solid #ececea;
    color: #232222;
    margin-top: 4rem;
}
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    color: #232222;
    font-weight: 700;
    letter-spacing: -.01em;
}
.footer-brand .brand-mark { width: 1.35rem; height: 1.35rem; color: #082429; }
.footer-muted { color: #232222; }
.footer-label { color: #232222; font-size: .75rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 600; }
.footer-link { color: #232222; text-decoration: none; transition: color .15s ease; }
.footer-link:hover { color: #082429; }

/* Tabs */
.qd-tabs .nav-link {
    color: var(--qv-muted);
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: 10px;
    padding: .5rem 1.1rem;
}
.qd-tabs .nav-link:hover { color: #fff; }
.qd-tabs .nav-link.active {
    background: var(--qv-surface);
    color: #fff;
    border-color: var(--qv-border);
}

:focus-visible { outline: 2px solid var(--qv-accent); outline-offset: 2px; }

@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .q-title, .q-url { max-width: 160px; }
}
@media (max-width: 576px) {
    .hero-section { padding: 48px 0 40px; }
    .hero-actions .btn { min-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .feature-card, .step-card, .dashboard-card { transition: none; }
}