@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-semantic-success: #1f8a65;
    --color-semantic-error: #cf2d56;

    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;

    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-base: 16px;
    --spacing-md: 20px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-section: 80px;
}

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

html { scroll-behavior: smooth; }

body {
    background: 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-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* NAV */
.site-nav {
    background: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

.nav-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    letter-spacing: -0.3px;
    text-decoration: none;
}

.nav-logo-mark {
    color: var(--color-primary);
    font-size: 10px;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
    text-decoration: none;
    line-height: 1.4;
    transition: color 0.15s;
}

.nav-links a:hover { color: var(--color-primary); text-decoration: none; }

.nav-dropdown { position: relative; }

.nav-sub {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xs) 0;
    min-width: 220px;
    list-style: none;
    box-shadow: 0 4px 16px rgba(38,37,30,0.07);
    margin-top: var(--spacing-xs);
    z-index: 200;
}

.nav-dropdown:hover .nav-sub { display: block; }

.nav-sub li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-base);
    font-size: 14px;
    font-weight: 400;
    color: var(--color-body);
}

.nav-sub li a:hover { color: var(--color-primary); background: var(--color-canvas-soft); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* HERO */
.hero-band {
    padding: var(--spacing-section) 0;
    background: var(--color-canvas);
}

.hero-band h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--color-ink);
    max-width: 800px;
    margin-bottom: var(--spacing-lg);
}

.hero-band .hero-sub {
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-body);
    max-width: 600px;
    margin-bottom: var(--spacing-xxl);
}

.hero-image-wrap {
    margin-top: var(--spacing-xxl);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
    max-height: 480px;
}

.hero-image-wrap img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

/* SECTION */
.section {
    padding: var(--spacing-section) 0;
}

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

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

.section-sub {
    font-size: 16px;
    color: var(--color-body);
    max-width: 560px;
    margin-bottom: var(--spacing-xxl);
}

/* CARDS */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-ink);
}

.feature-card p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.5;
}

.feature-card .card-link {
    margin-top: auto;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
}

.article-card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.article-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.article-card-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
}

.article-card-body .badge-pill {
    align-self: flex-start;
}

.article-card-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
}

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

.article-card-body .card-link {
    margin-top: auto;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
}

/* BADGE */
.badge-pill {
    display: inline-flex;
    align-items: center;
    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;
}

/* BUTTONS */
.btn-primary {
    display: inline-flex;
    align-items: center;
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-primary:hover { background: var(--color-primary-active); text-decoration: none; color: var(--color-on-primary); }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    background: var(--color-surface-card);
    color: var(--color-ink);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: 1px solid var(--color-hairline-strong);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.15s;
}

.btn-secondary:hover { border-color: var(--color-ink); text-decoration: none; color: var(--color-ink); }

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

/* ARTICLE PAGE */
.article-header {
    padding: var(--spacing-xxl) 0 var(--spacing-section);
    border-bottom: 1px solid var(--color-hairline);
}

.article-header h1 {
    font-size: 46px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -1.2px;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
    max-width: 720px;
}

.article-header .article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-base);
    color: var(--color-muted);
    font-size: 14px;
}

.article-body {
    padding: var(--spacing-section) 0;
}

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

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    line-height: 1.25;
    color: var(--color-ink);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-base);
}

.article-content h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-ink);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

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

.article-content ul, .article-content ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
}

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

.article-content .article-img {
    margin: var(--spacing-xxl) 0;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
}

.article-content .article-img img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.article-content .img-caption {
    padding: var(--spacing-sm) var(--spacing-base);
    background: var(--color-canvas-soft);
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.4;
    border-top: 1px solid var(--color-hairline);
}

.info-box {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--rounded-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.info-box h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-box p {
    font-size: 14px;
    color: var(--color-body);
    margin: 0;
}

.related-articles {
    padding: var(--spacing-section) 0;
    border-top: 1px solid var(--color-hairline);
}

/* PAGE */
.page-header {
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    border-bottom: 1px solid var(--color-hairline);
}

.page-header h1 {
    font-size: 46px;
    font-weight: 400;
    letter-spacing: -1.2px;
    line-height: 1.15;
    color: var(--color-ink);
    margin-bottom: var(--spacing-base);
}

.page-header .page-updated {
    font-size: 14px;
    color: var(--color-muted);
}

.page-body {
    padding: var(--spacing-section) 0;
}

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

.page-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--color-ink);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-base);
}

.page-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

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

.page-content ul, .page-content ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
}

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

/* CONTACT FORM */
.contact-form-wrap {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xxl);
    max-width: 560px;
    margin-top: var(--spacing-xxl);
}

.contact-form-wrap h3 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-base);
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
}

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

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

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

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

.form-error-msg {
    font-size: 13px;
    color: var(--color-semantic-error);
    display: none;
}

.form-error-msg.visible { display: block; }

.form-success {
    display: none;
    background: #e8f5f0;
    border: 1px solid #9fd4c0;
    border-radius: var(--rounded-md);
    padding: var(--spacing-base);
    font-size: 15px;
    color: var(--color-semantic-success);
    margin-top: var(--spacing-base);
}

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

.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 24px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: var(--spacing-base);
    min-width: 140px;
}

.btn-submit:hover { background: var(--color-primary-active); }

.btn-submit .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: none;
}

.btn-submit.loading .btn-label { display: none; }
.btn-submit.loading .spinner { display: block; }

@keyframes spin { to { transform: rotate(360deg); } }

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

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xxl);
}

.footer-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    margin-bottom: var(--spacing-base);
}

.footer-tagline {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.5;
}

.footer-col h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-ink);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: var(--spacing-base);
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: var(--spacing-xs); }

.footer-col ul li a {
    font-size: 14px;
    color: var(--color-body);
    text-decoration: none;
    transition: color 0.15s;
}

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

.footer-legal {
    font-size: 13px;
    color: var(--color-muted-soft);
    margin-top: var(--spacing-base);
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xxl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-hairline-soft);
    font-size: 13px;
    color: var(--color-muted-soft);
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface-card);
    border-top: 1px solid var(--color-hairline);
    z-index: 999;
    padding: var(--spacing-base) var(--spacing-lg);
}

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cookie-inner p {
    font-size: 14px;
    color: var(--color-body);
}

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

.cookie-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* BREADCRUMB */
.breadcrumb {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: var(--spacing-base);
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.breadcrumb a { color: var(--color-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-muted-soft); }

/* DISCLAIMER */
.disclaimer {
    background: var(--color-canvas-soft);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    padding: var(--spacing-base);
    font-size: 13px;
    color: var(--color-muted);
    margin-top: var(--spacing-section);
}

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface-card);
        border-bottom: 1px solid var(--color-hairline);
        flex-direction: column;
        padding: var(--spacing-base) var(--spacing-lg);
        gap: var(--spacing-base);
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: flex; }
    .nav-sub {
        display: none !important;
        position: static;
        box-shadow: none;
        border: none;
        padding: var(--spacing-xs) 0 0 var(--spacing-base);
    }
    .nav-dropdown .nav-sub-open { display: block !important; }
    .hero-band h1 { font-size: 36px; letter-spacing: -1px; }
    .hero-image-wrap img { height: 260px; }
    .card-grid { grid-template-columns: 1fr; }
    .card-grid-2 { grid-template-columns: 1fr; }
    .article-header h1 { font-size: 32px; letter-spacing: -0.5px; }
    .page-header h1 { font-size: 32px; letter-spacing: -0.5px; }
    .section-title { font-size: 28px; }
    .footer-container { grid-template-columns: 1fr 1fr; }
    .cookie-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .footer-container { grid-template-columns: 1fr; }
    .contact-form-wrap { padding: var(--spacing-lg); }
}