@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    color-scheme: light;
}

html.dark {
    color-scheme: dark;
}

body {
    font-family: 'Inter', sans-serif;
    background-image: radial-gradient(circle at 10% -20%, rgba(99, 102, 241, 0.12), transparent 45%),
        radial-gradient(circle at 90% 120%, rgba(14, 165, 233, 0.1), transparent 45%);
}

.dark body {
    background-image: radial-gradient(circle at 10% -20%, rgba(99, 102, 241, 0.2), transparent 45%),
        radial-gradient(circle at 90% 120%, rgba(14, 165, 233, 0.16), transparent 45%);
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #64748b;
    border-radius: 9999px;
}

.nav-shell {
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(12px);
}

.dark .nav-shell {
    background: rgba(15, 23, 42, 0.78);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    padding: 0.45rem 0.9rem;
    color: #475569;
    transition: all 0.25s ease;
}

.dark .nav-link {
    color: #cbd5e1;
}

.nav-link:hover {
    background: rgba(15, 23, 42, 0.06);
    color: #4f46e5;
}

.dark .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #f8fafc;
}

.nav-link-active {
    background: #0f172a;
    color: #ffffff;
    font-weight: 700;
}

.dark .nav-link-active {
    background: #f8fafc;
    color: #0f172a;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 9999px;
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 700;
    background: #0f172a;
    color: #ffffff;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 30px -16px rgba(15, 23, 42, 0.9);
}

.dark .btn-primary {
    background: #ffffff;
    color: #0f172a;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 9999px;
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 700;
    border: 1px solid rgba(148, 163, 184, 0.35);
    color: #0f172a;
    transition: all 0.2s ease;
}

.dark .btn-secondary {
    border-color: rgba(148, 163, 184, 0.3);
    color: #e2e8f0;
}

.btn-secondary:hover {
    border-color: rgba(99, 102, 241, 0.45);
    color: #4f46e5;
}

.dark .btn-secondary:hover {
    color: #a5b4fc;
}

.card {
    border-radius: 28px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
}

.dark .card {
    background: rgba(15, 23, 42, 0.75);
    border-color: rgba(148, 163, 184, 0.15);
}

.card-hover {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card-hover:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 35px -26px rgba(15, 23, 42, 0.8);
    border-color: rgba(99, 102, 241, 0.45);
}

.tag {
    display: inline-flex;
    align-items: center;
    border-radius: 9999px;
    padding: 0.22rem 0.65rem;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: rgba(79, 70, 229, 0.1);
    color: #4338ca;
}

.dark .tag {
    background: rgba(129, 140, 248, 0.2);
    color: #c7d2fe;
}

.meta {
    color: #64748b;
    font-size: 0.8rem;
}

.dark .meta {
    color: #94a3b8;
}

.article-content h2 {
    margin-top: 1.7rem;
    margin-bottom: 0.75rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
}

.article-content h3 {
    margin-top: 1.4rem;
    margin-bottom: 0.55rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.article-content p {
    margin-top: 0.8rem;
    color: #334155;
    line-height: 1.7;
}

.dark .article-content p {
    color: #cbd5e1;
}

.article-content ul {
    list-style: disc;
    padding-left: 1.2rem;
    margin-top: 0.8rem;
}

.article-content li {
    margin-top: 0.45rem;
    color: #334155;
}

.dark .article-content li {
    color: #cbd5e1;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
}