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

:root {
    --color-primary: #f54e00;
    --color-primary-active: #d04200;
    --color-canvas: #f7f7f4;
    --color-canvas-soft: #fafaf7;
    --color-surface-card: #ffffff;
    --color-surface-strong: #e6e5e0;
    --color-hairline: #e6e5e0;
    --color-hairline-soft: #efeee8;
    --color-hairline-strong: #cfcdc4;
    --color-ink: #26251e;
    --color-body: #5a5852;
    --color-muted: #807d72;
    --color-muted-soft: #a09c92;
    --color-on-primary: #ffffff;
    --color-success: #1f8a65;
    --color-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
    --font-display: 'Inter', system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

*, *::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: var(--font-display);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 400;
    color: var(--color-ink);
    line-height: 1.2;
}

h1 { font-size: 36px; letter-spacing: -0.72px; }
h2 { font-size: 26px; letter-spacing: -0.325px; }
h3 { font-size: 22px; letter-spacing: -0.11px; }
h4 { font-size: 18px; font-weight: 600; letter-spacing: 0; line-height: 1.4; }
h5 { font-size: 16px; font-weight: 600; letter-spacing: 0; line-height: 1.4; }

p { margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

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

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: -0.3px;
    text-decoration: none;
}

.nav-logo 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 ease;
}

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

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

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

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

/* Hero Section */
.hero {
    padding: 80px 0;
    border-bottom: 1px solid var(--color-hairline);
}

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

.hero-title {
    font-size: clamp(32px, 5vw, 72px);
    font-weight: 400;
    letter-spacing: -2.16px;
    line-height: 1.1;
    color: var(--color-ink);
    margin-bottom: 24px;
    max-width: 800px;
}

.hero-desc {
    font-size: 18px;
    color: var(--color-body);
    max-width: 600px;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-meta {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 40px;
}

.hero-image {
    margin-top: 48px;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
    max-height: 520px;
}

.hero-image img {
    width: 100%;
    height: 520px;
    object-fit: cover;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-border {
    border-bottom: 1px solid var(--color-hairline);
}

.section-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 32px;
}

.section-title {
    font-size: 26px;
    letter-spacing: -0.325px;
    color: var(--color-ink);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-body);
    max-width: 640px;
    line-height: 1.6;
    margin-bottom: 48px;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.cards-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

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

.card-image {
    border-radius: var(--rounded-md);
    overflow: hidden;
    margin-bottom: 20px;
    aspect-ratio: 16/9;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 12px;
    line-height: 1.4;
}

.card-title a {
    color: var(--color-ink);
}

.card-title a:hover {
    color: var(--color-primary);
}

.card-excerpt {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.5;
    margin-bottom: 0;
}

.card-meta {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-hairline-soft);
}

/* Article Layout */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}

.article-content h2 {
    font-size: 26px;
    letter-spacing: -0.325px;
    color: var(--color-ink);
    margin-top: 40px;
    margin-bottom: 16px;
}

.article-content h3 {
    font-size: 20px;
    color: var(--color-ink);
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-content p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.7;
    margin-bottom: 20px;
}

.article-content ul, .article-content ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-content li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.7;
    margin-bottom: 8px;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-image {
    margin: 32px 0;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
}

.article-image img {
    width: 100%;
    height: auto;
    max-height: 480px;
    object-fit: cover;
}

.article-image figcaption {
    font-size: 13px;
    color: var(--color-muted);
    padding: 12px 16px;
    background: var(--color-canvas-soft);
    font-family: var(--font-display);
}

.article-sidebar {
    position: sticky;
    top: 80px;
}

.sidebar-card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.sidebar-card-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 16px;
}

.sidebar-links {
    list-style: none;
}

.sidebar-links li {
    border-bottom: 1px solid var(--color-hairline-soft);
    padding: 10px 0;
}

.sidebar-links li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.sidebar-links a {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.4;
}

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

/* Info Box */
.info-box {
    background: var(--color-canvas-soft);
    border: 1px solid var(--color-hairline);
    border-left: 3px solid var(--color-ink);
    border-radius: var(--rounded-md);
    padding: 20px 24px;
    margin: 32px 0;
}

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

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}

.data-table th {
    background: var(--color-surface-strong);
    color: var(--color-ink);
    font-weight: 600;
    padding: 12px 16px;
    text-align: left;
    border: 1px solid var(--color-hairline);
}

.data-table td {
    padding: 12px 16px;
    border: 1px solid var(--color-hairline);
    color: var(--color-body);
    background: var(--color-surface-card);
}

.data-table tr:nth-child(even) td {
    background: var(--color-canvas-soft);
}

/* Form */
.form-section {
    background: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 40px;
}

.form-title {
    font-size: 22px;
    color: var(--color-ink);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 32px;
}

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

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

.form-input {
    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: var(--font-display);
    color: var(--color-ink);
    transition: border-color 0.15s ease;
    outline: none;
}

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

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

.form-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--color-ink);
    color: var(--color-canvas);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    height: 44px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    font-family: var(--font-display);
    transition: opacity 0.15s ease;
}

.form-btn:hover {
    opacity: 0.85;
}

.form-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    display: none;
    padding: 16px 20px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    margin-top: 16px;
}

.form-message.success {
    background: #e8f5f0;
    color: var(--color-success);
    border: 1px solid #b8e0d2;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

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

.footer-brand-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 12px;
}

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

.footer-brand-desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    max-width: 260px;
}

.footer-col-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.4;
}

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

.footer-bottom {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--color-hairline-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

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

.footer-legal {
    display: flex;
    gap: 20px;
}

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

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

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-ink);
    color: var(--color-canvas);
    padding: 20px 24px;
    z-index: 1000;
    display: none;
}

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

.cookie-text {
    font-size: 14px;
    color: var(--color-canvas-soft);
    flex: 1;
    min-width: 280px;
}

.cookie-text a {
    color: var(--color-canvas);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cookie-buttons {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.btn-cookie-accept {
    background: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-display);
    transition: background 0.15s ease;
}

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

.btn-cookie-reject {
    background: transparent;
    color: var(--color-canvas-soft);
    border: 1px solid rgba(247,247,244,0.3);
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-display);
    transition: border-color 0.15s ease;
}

.btn-cookie-reject:hover {
    border-color: rgba(247,247,244,0.6);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: 13px;
    color: var(--color-muted);
    border-bottom: 1px solid var(--color-hairline-soft);
    margin-bottom: 0;
}

.breadcrumb a {
    color: var(--color-muted);
}

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

.breadcrumb-sep {
    color: var(--color-hairline-strong);
}

/* Page Header */
.page-header {
    padding: 48px 0 40px;
    border-bottom: 1px solid var(--color-hairline);
    margin-bottom: 0;
}

.page-header-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 12px;
}

.page-header-title {
    font-size: clamp(28px, 4vw, 56px);
    letter-spacing: -1.5px;
    color: var(--color-ink);
    margin-bottom: 16px;
    max-width: 740px;
}

.page-header-meta {
    font-size: 14px;
    color: var(--color-muted);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Static Page Content */
.static-content {
    max-width: 720px;
    padding: 48px 0;
}

.static-content h2 {
    font-size: 22px;
    color: var(--color-ink);
    margin-top: 40px;
    margin-bottom: 12px;
}

.static-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-top: 28px;
    margin-bottom: 10px;
}

.static-content p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.static-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.static-content li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.7;
    margin-bottom: 6px;
}

.static-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Disclaimer */
.disclaimer {
    background: var(--color-canvas-soft);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    padding: 16px 20px;
    font-size: 13px;
    color: var(--color-muted);
    margin-top: 48px;
}

/* Updated date */
.updated-date {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 32px;
}

/* Responsive */
@media (max-width: 1024px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .footer-inner > *:first-child {
        grid-column: 1 / -1;
    }
    .article-layout {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
    }
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 28px; letter-spacing: -0.5px; }
    .hero { padding: 48px 0; }
    .section { padding: 48px 0; }
    .hero-title { letter-spacing: -1px; }
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-canvas);
        border-bottom: 1px solid var(--color-hairline);
        padding: 16px 24px;
        gap: 16px;
    }
    .nav-hamburger { display: flex; }
    .site-nav { position: relative; }
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .footer-inner > *:first-child {
        grid-column: 1 / -1;
    }
    .cards-grid { grid-template-columns: 1fr; }
    .cards-grid-2 { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .form-section { padding: 24px; }
    .footer-inner { grid-template-columns: 1fr; }
    .cookie-inner { flex-direction: column; align-items: flex-start; }
}