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

:root {
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin-top: 5rem;
    margin-bottom: 6rem;
    letter-spacing: -0.01em;
}

.block {
    margin-bottom: 6rem;
}

pre {
    background-color: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    font-size: 0.9rem;
}

/* Navbar */
nav.navbar .container-fluid {
    max-width: 1200px;
    margin: 0 auto;
}

nav.navbar {
    background: rgba(10, 10, 15, 0.8) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    padding: 0.5rem 0;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.navbar-brand:hover {
    opacity: 1;
}

.nav-link {
    transition: color 0.2s, opacity 0.2s;
    opacity: 0.6;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
}

body img {
    max-width: 100%;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Hero */
.block-hero .card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.08), rgba(236, 72, 153, 0.06)) !important;
    border: 1px solid var(--border) !important;
    border-radius: 1.5rem;
    overflow: hidden;
    position: relative;
}

.block-hero .card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.12), transparent 60%);
    pointer-events: none;
}

.block-hero .display-4 {
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.block-hero .lead {
    font-weight: 300;
    font-size: 1.3rem;
    opacity: 0.75;
}

.block-hero hr {
    border-color: var(--border);
    opacity: 0.5;
}

.block-hero .btn-primary {
    background: var(--accent);
    border: none;
    border-radius: 0.75rem;
    padding: 0.75rem 2rem;
    font-weight: 500;
    transition: all 0.2s;
}

.block-hero .btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

/* Text-Image */
.block-text-image {
    padding: 2rem 0;
}

.block-text-image .row {
    align-items: center;
    gap: 0;
}

.block-text-image h2 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.block-text-image .img-fluid {
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: transform 0.3s;
}

.block-text-image .img-fluid:hover {
    transform: scale(1.02);
}

/* Three Columns */
.block-three-columns .row > div {
    padding: 1.5rem;
}

.block-three-columns h3 {
    font-weight: 600;
    font-size: 1.15rem;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.block-three-columns .row {
    gap: 1rem;
}

.block-three-columns .row > div {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem !important;
    transition: background 0.2s, border-color 0.2s;
}

@media (min-width: 768px) {
    .block-three-columns .row > div {
        flex: 1;
    }
}

.block-three-columns .row > div:hover {
    background: var(--surface-hover);
    border-color: rgba(255, 255, 255, 0.12);
}

/* Cards */
.block-cards h2 {
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.block-cards .card {
    background: var(--surface) !important;
    border: 1px solid var(--border) !important;
    border-radius: 1rem;
    overflow: hidden;
    margin: 0.375rem;
}

.block-cards .card-img-top {
    padding: 1.5rem 1.5rem 0;
}

.block-cards .card-body {
    font-size: 0.9rem;
    opacity: 0.7;
    padding: 1rem 1.5rem 1.5rem;
}

/* Text Block */
.block-text {
    padding: 2rem 0;
}

.block-text h2 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.block-text h3 {
    font-weight: 600;
    font-size: 1.15rem;
    margin-top: 2rem;
}

.block-text ul {
    padding-left: 1.25rem;
}

.block-text li {
    margin-bottom: 0.4rem;
}

/* Links */
a {
    color: var(--accent-hover);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #a5b4fc;
}

/* Selection */
::selection {
    background: rgba(99, 102, 241, 0.3);
}