:root {
    --vn-bg: #0f172a;
    --vn-bg-2: #111827;
    --vn-soft: #f8fafc;
    --vn-dark: #111827;
    --vn-muted: #64748b;
    --vn-accent: #2563eb;
    --vn-accent-dark: #1d4ed8;
    --vn-border: #e5e7eb;
    --vn-radius: 22px;

    --vn-nav-bg: rgba(15, 23, 42, 0.94);
    --vn-nav-border: rgba(255,255,255,0.08);
    --vn-text-on-dark: #ffffff;

    --vn-brand-glow: rgba(239, 68, 68, 0.35);
    --vn-hero-accent-1: rgba(239, 68, 68, 0.16);
    --vn-hero-accent-2: rgba(59, 130, 246, 0.10);
    --vn-eyebrow: #fca5a5;

    --vn-card-bg: #ffffff;
    --vn-card-border: #eef2f7;
    --vn-thumb-bg-1: #334155;
    --vn-thumb-bg-2: #0f172a;

    --vn-badge-bg: #e2e8f0;
    --vn-badge-text: #334155;

    --vn-empty-icon-bg-1: #fee2e2;
    --vn-empty-icon-bg-2: #fecdd3;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--vn-soft);
    color: var(--vn-dark);
    margin: 0;
}

a {
    text-decoration: none;
}

img {
    max-width: 100%;
}

.vidnook-nav {
    background: var(--vn-nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--vn-nav-border);
}

.vidnook-nav .nav-link,
.brand-text {
    color: var(--vn-text-on-dark);
}

.vidnook-nav .nav-link {
    opacity: 0.92;
    font-weight: 500;
}

.vidnook-nav .nav-link:hover {
    opacity: 1;
    color: var(--vn-text-on-dark);
}

.brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--vn-accent), var(--vn-accent-dark));
    color: #fff;
    box-shadow: 0 8px 20px var(--vn-brand-glow);
}

.brand-text {
    font-weight: 800;
    letter-spacing: 0.2px;
    font-size: 1.2rem;
}

.page-wrap {
    padding: 2.5rem 0 3rem;
}

.card,
.vn-card {
    background: var(--vn-card-bg);
    border: 1px solid var(--vn-card-border);
    border-radius: var(--vn-radius);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.form-control,
.form-select {
    min-height: 48px;
    font-size: 16px;
    border-radius: 12px;
    border-color: var(--vn-border);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--vn-accent);
    box-shadow: 0 0 0 .2rem rgba(239, 68, 68, .15);
}

.btn {
    min-height: 46px;
    font-size: 16px;
    border-radius: 12px;
}

.btn-accent {
    background-color: var(--vn-accent);
    border-color: var(--vn-accent);
    color: #fff;
}

.btn-accent:hover,
.btn-accent:focus {
    background-color: var(--vn-accent-dark);
    border-color: var(--vn-accent-dark);
    color: #fff;
}

.btn-outline-accent {
    color: var(--vn-accent);
    border-color: var(--vn-accent);
    background-color: transparent;
}

.btn-outline-accent:hover,
.btn-outline-accent:focus {
    background-color: var(--vn-accent);
    border-color: var(--vn-accent);
    color: #fff;
}

.family-badge,
.vn-badge {
    display: inline-block;
    padding: 0.25rem 0.55rem;
    border-radius: 999px;
    background: var(--vn-badge-bg);
    color: var(--vn-badge-text);
    font-size: 0.78rem;
    font-weight: 600;
}

.empty-state {
    background: var(--vn-card-bg);
    border: 1px solid var(--vn-card-border);
    border-radius: 28px;
    padding: 4rem 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.empty-icon {
    width: 82px;
    height: 82px;
    margin: 0 auto 1rem;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--vn-empty-icon-bg-1), var(--vn-empty-icon-bg-2));
    color: var(--vn-accent-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

@media (max-width: 575.98px) {
    .page-wrap {
        padding: 2rem 0 2.5rem;
    }

    .form-control,
    .form-select {
        min-height: 54px;
        font-size: 16px;
    }

    .btn {
        min-height: 54px;
        font-size: 16px;
    }
}