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

:root {
    --color-canvas: #f7f7f4;
    --color-canvas-soft: #fafaf7;
    --color-surface-card: #ffffff;
    --color-surface-strong: #e6e5e0;
    --color-primary: #f54e00;
    --color-primary-active: #d04200;
    --color-ink: #26251e;
    --color-body: #5a5852;
    --color-muted: #807d72;
    --color-muted-soft: #a09c92;
    --color-on-primary: #ffffff;
    --color-hairline: #e6e5e0;
    --color-hairline-soft: #efeee8;
    --color-hairline-strong: #cfcdc4;
    --color-success: #1f8a65;
    --color-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    background-color: var(--color-canvas);
    color: var(--color-body);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-ink); text-decoration: none; }
a:hover { color: var(--color-primary); }

img { max-width: 100%; height: auto; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== NAVIGATION ===== */
.site-nav {
    background-color: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: -0.3px;
}

.nav-brand span { color: var(--color-primary); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-body);
    line-height: 1.4;
    transition: color 0.15s;
}

.nav-links a:hover { color: var(--color-ink); }

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: all 0.2s;
}

.nav-mobile {
    display: none;
    background: var(--color-canvas);
    border-top: 1px solid var(--color-hairline);
    padding: 16px 24px;
}

.nav-mobile.open { display: block; }

.nav-mobile ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.nav-mobile ul a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-body);
}

/* ===== HERO ===== */
.hero {
    padding: 80px 0;
    text-align: center;
}

.hero-label {
    display: inline-block;
    background: var(--color-surface-strong);
    color: var(--color-ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 72px;
    font-weight: 400;
    color: var(--color-ink);
    line-height: 1.1;
    letter-spacing: -2.16px;
    max-width: 900px;
    margin: 0 auto 20px;
}

.hero-sub {
    font-size: 18px;
    color: var(--color-body);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.5;
}

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-alt { background-color: var(--color-canvas-soft); }

.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    color: var(--color-ink);
    line-height: 1.2;
    letter-spacing: -0.72px;
    margin-bottom: 20px;
}

.section-body {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.5;
    max-width: 640px;
    margin-bottom: 48px;
}

/* ===== CARDS ===== */
.card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.card-icon {
    width: 40px;
    height: 40px;
    background: var(--color-surface-strong);
    border-radius: var(--rounded-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 8px;
}

.card-text {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.5;
}

/* ===== ARTICLE CARDS ===== */
.article-card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    transition: border-color 0.15s;
}

.article-card:hover { border-color: var(--color-hairline-strong); }

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.article-card-body { padding: 20px; }

.article-category {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 8px;
}

.article-card-excerpt {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.5;
    margin-bottom: 16px;
}

.article-meta {
    font-size: 13px;
    color: var(--color-muted);
}

/* ===== ARTICLE PAGE ===== */
.article-header {
    padding: 60px 0 40px;
    border-bottom: 1px solid var(--color-hairline);
    margin-bottom: 48px;
}

.article-header h1 {
    font-size: 42px;
    font-weight: 400;
    color: var(--color-ink);
    line-height: 1.2;
    letter-spacing: -0.72px;
    margin-bottom: 20px;
    max-width: 800px;
}

.article-header-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--color-muted);
    flex-wrap: wrap;
}

.article-content { max-width: 720px; }

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--color-ink);
    letter-spacing: -0.325px;
    line-height: 1.25;
    margin: 40px 0 16px;
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.3;
    margin: 28px 0 12px;
}

.article-content p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: 20px;
}

.article-content ul, .article-content ol {
    padding-left: 20px;
    margin-bottom: 20px;
}

.article-content li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: 6px;
}

.article-content figure {
    margin: 32px 0;
}

.article-content figure img {
    border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline);
}

.article-content figcaption {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: 8px;
    line-height: 1.4;
}

.article-content .code-block {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 20px;
    margin: 24px 0;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 13px;
    color: var(--color-ink);
    overflow-x: auto;
    line-height: 1.5;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-content a:hover { color: var(--color-primary-active); }

/* ===== INFO BOX ===== */
.info-box {
    background: var(--color-canvas-soft);
    border: 1px solid var(--color-hairline);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
    padding: 16px 20px;
    margin: 24px 0;
}

.info-box p {
    margin-bottom: 0;
    font-size: 15px;
    color: var(--color-body);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
    padding: 16px 0;
    font-size: 13px;
    color: var(--color-muted);
}

.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { margin: 0 6px; }

/* ===== FORM ===== */
.form-section { padding: 80px 0; }

.form-wrap {
    max-width: 560px;
}

.form-row { margin-bottom: 20px; }

.form-row label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
    margin-bottom: 6px;
}

.form-row input,
.form-row textarea {
    width: 100%;
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    height: 44px;
    font-size: 16px;
    font-family: inherit;
    color: var(--color-ink);
    outline: none;
    transition: border-color 0.15s;
}

.form-row textarea {
    height: auto;
    min-height: 120px;
    resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
    border-color: var(--color-ink);
}

.form-row input.error,
.form-row textarea.error {
    border-color: var(--color-error);
}

.field-error {
    font-size: 13px;
    color: var(--color-error);
    margin-top: 4px;
    display: none;
}

.field-error.visible { display: block; }

.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    border-radius: var(--rounded-md);
    padding: 10px 18px;
    height: 40px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    line-height: 1;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover { background: var(--color-primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-success {
    display: none;
    background: var(--color-canvas-soft);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    padding: 16px 20px;
    font-size: 15px;
    color: var(--color-success);
    margin-top: 16px;
}

.form-success.visible { display: block; }

/* ===== DIVIDER ===== */
.hairline { border: none; border-top: 1px solid var(--color-hairline); margin: 0; }

/* ===== FOOTER ===== */
.site-footer {
    background: var(--color-canvas);
    border-top: 1px solid var(--color-hairline);
    padding: 64px 0 48px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.5;
    max-width: 260px;
    margin-top: 12px;
}

.footer-col h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-ink);
    margin-bottom: 16px;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }

.footer-col ul a {
    font-size: 14px;
    color: var(--color-body);
    transition: color 0.15s;
}

.footer-col ul a:hover { color: var(--color-ink); }

.footer-bottom {
    border-top: 1px solid var(--color-hairline);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-muted);
}

/* ===== COOKIE BANNER ===== */
#cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface-card);
    border-top: 1px solid var(--color-hairline);
    padding: 20px 24px;
    z-index: 999;
    display: none;
}

#cookie-banner.visible { display: block; }

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.cookie-inner p {
    flex: 1;
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.5;
    min-width: 200px;
}

.cookie-inner p a {
    color: var(--color-primary);
    text-decoration: underline;
}

.cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }

.btn-cookie-accept {
    background: var(--color-ink);
    color: var(--color-canvas);
    border: none;
    border-radius: var(--rounded-md);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn-cookie-accept:hover { opacity: 0.85; }

.btn-cookie-reject {
    background: transparent;
    color: var(--color-body);
    border: 1px solid var(--color-hairline-strong);
    border-radius: var(--rounded-md);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 0.15s;
}

.btn-cookie-reject:hover { border-color: var(--color-ink); }

/* ===== PAGE SPECIFIC ===== */
.page-hero {
    padding: 60px 0 48px;
    border-bottom: 1px solid var(--color-hairline);
    margin-bottom: 56px;
}

.page-hero h1 {
    font-size: 42px;
    font-weight: 400;
    color: var(--color-ink);
    letter-spacing: -0.72px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 18px;
    color: var(--color-body);
    max-width: 600px;
}

.prose { max-width: 720px; }
.prose h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--color-ink);
    letter-spacing: -0.325px;
    margin: 40px 0 16px;
}
.prose h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin: 28px 0 10px;
}
.prose p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: 16px;
}
.prose ul { padding-left: 20px; margin-bottom: 16px; }
.prose li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: 4px;
}

/* ===== STATS ROW ===== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-hairline);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    margin: 48px 0;
}

.stat-item {
    background: var(--color-surface-card);
    padding: 28px 24px;
    text-align: center;
}

.stat-value {
    font-size: 32px;
    font-weight: 400;
    color: var(--color-ink);
    letter-spacing: -0.72px;
    line-height: 1.1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 13px;
    color: var(--color-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero h1 { font-size: 56px; letter-spacing: -1.5px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-hamburger { display: flex; }
    .hero h1 { font-size: 36px; letter-spacing: -1px; }
    .section-title { font-size: 28px; }
    .article-header h1 { font-size: 30px; }
    .page-hero h1 { font-size: 30px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
    .hero { padding: 48px 0; }
    .hero h1 { font-size: 32px; letter-spacing: -0.7px; }
    .section { padding: 48px 0; }
    .card-grid { grid-template-columns: 1fr; }
    .card-grid-2 { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: 1fr 1fr; }
}