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

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

:root {
    --color-canvas: #f7f7f4;
    --color-canvas-soft: #fafaf7;
    --color-surface-card: #ffffff;
    --color-surface-strong: #e6e5e0;
    --color-ink: #26251e;
    --color-body: #5a5852;
    --color-body-strong: #26251e;
    --color-muted: #807d72;
    --color-muted-soft: #a09c92;
    --color-primary: #f54e00;
    --color-primary-active: #d04200;
    --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;

    --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-canvas);
    color: var(--color-body);
    font-family: var(--font-sans);
    font-size: 16px;
    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;
}

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

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

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

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

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

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

.nav-menu 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-color: var(--color-ink);
    border-radius: 2px;
    transition: all 0.2s;
}

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

.hero-inner {
    max-width: 720px;
}

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

.hero h1 {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--color-ink);
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 18px;
    color: var(--color-body);
    line-height: 1.5;
    max-width: 560px;
}

/* SECTION */
.section {
    padding: 80px 0;
    border-bottom: 1px solid var(--color-hairline-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;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--color-ink);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-body);
    max-width: 600px;
    line-height: 1.5;
}

/* CARDS GRID */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.card {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    transition: border-color 0.15s;
}

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

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--rounded-md);
    margin-bottom: 20px;
}

.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);
    line-height: 1.4;
    margin-bottom: 12px;
}

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

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

.card-link:hover {
    color: var(--color-primary-active);
}

/* ARTICLE PAGE */
.article-header {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--color-hairline);
}

.article-header .hero-label {
    margin-bottom: 20px;
}

.article-header h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--color-ink);
    line-height: 1.15;
    margin-bottom: 20px;
    max-width: 800px;
}

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

.article-content {
    padding: 48px 0 80px;
}

.article-body {
    max-width: 760px;
}

.article-body p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.65;
    margin-bottom: 24px;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--color-ink);
    line-height: 1.25;
    margin-top: 48px;
    margin-bottom: 20px;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    margin-top: 32px;
    margin-bottom: 12px;
}

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

.article-body li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.65;
    margin-bottom: 8px;
}

.article-body .img-full {
    width: 100%;
    height: 420px;
    object-fit: cover;
    border-radius: var(--rounded-lg);
    margin: 32px 0;
    border: 1px solid var(--color-hairline);
}

.article-body .img-caption {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: -20px;
    margin-bottom: 32px;
}

.article-body a {
    color: var(--color-primary);
    border-bottom: 1px solid transparent;
}

.article-body a:hover {
    border-bottom-color: var(--color-primary);
}

.article-body .info-box {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--rounded-md);
    padding: 20px 24px;
    margin: 32px 0;
}

.article-body .info-box p {
    margin-bottom: 0;
    font-size: 15px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 32px 0;
    font-size: 14px;
}

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

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

.data-table tr:last-child td {
    border-bottom: none;
}

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

/* RELATED ARTICLES */
.related-section {
    padding: 48px 0;
    border-top: 1px solid var(--color-hairline);
}

.related-title {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--color-ink);
    margin-bottom: 32px;
}

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

/* TWO COLUMN LAYOUT */
.layout-two-col {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}

.sidebar-card {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    position: sticky;
    top: 80px;
}

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

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

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

.sidebar-list li:last-child {
    border-bottom: none;
}

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

.sidebar-list a:hover {
    color: var(--color-primary);
}

/* CONTACT FORM */
.contact-section {
    padding: 80px 0;
}

.form-card {
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-lg);
    padding: 40px;
    max-width: 600px;
}

.form-title {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    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-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background-color: var(--color-surface-card);
    border: 1px solid var(--color-hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--color-ink);
    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-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-muted-soft);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: 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;
    transition: background-color 0.15s;
    font-family: var(--font-sans);
}

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

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

.form-message {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--rounded-md);
    font-size: 14px;
    display: none;
}

.form-message.success {
    background-color: #e8f5f0;
    color: var(--color-success);
    border: 1px solid #b8dfd4;
    display: block;
}

.form-message.error {
    background-color: #fdf0f3;
    color: var(--color-error);
    border: 1px solid #f5c0cd;
    display: block;
}

/* PAGE HEADER */
.page-header {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--color-hairline);
    margin-bottom: 64px;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--color-ink);
    margin-bottom: 16px;
}

.page-header p {
    font-size: 16px;
    color: var(--color-body);
    max-width: 560px;
}

.page-body {
    max-width: 760px;
    padding-bottom: 80px;
}

.page-body h2 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--color-ink);
    margin-top: 40px;
    margin-bottom: 16px;
}

.page-body p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.65;
    margin-bottom: 20px;
}

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

.page-body li {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.65;
    margin-bottom: 6px;
}

/* FOOTER */
.footer {
    background-color: 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: 40px;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--color-body);
    line-height: 1.6;
    margin-top: 12px;
    max-width: 240px;
}

.footer-col-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--color-muted);
    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;
    transition: color 0.15s;
}

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

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

.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-body);
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-ink);
    color: var(--color-canvas);
    padding: 20px 28px;
    border-radius: var(--rounded-lg);
    max-width: 560px;
    width: calc(100% - 48px);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    z-index: 999;
    box-shadow: 0 4px 24px rgba(38,37,30,0.18);
}

.cookie-banner.hidden {
    display: none;
}

.cookie-text {
    flex: 1;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-canvas-soft);
}

.cookie-text a {
    color: var(--color-canvas);
    border-bottom: 1px solid rgba(247,247,244,0.4);
}

.cookie-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}

.btn-cookie-accept {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    padding: 8px 16px;
    border-radius: var(--rounded-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    white-space: nowrap;
}

.btn-cookie-reject {
    background-color: transparent;
    color: var(--color-muted-soft);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: var(--rounded-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    white-space: nowrap;
}

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

/* BREADCRUMB */
.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 16px 0;
    font-size: 13px;
    color: var(--color-muted);
}

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

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

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

/* DISCLAIMER */
.disclaimer {
    background-color: 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: 32px 0;
    line-height: 1.5;
}

/* UPDATED DATE */
.updated-date {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: 8px;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .layout-two-col {
        grid-template-columns: 1fr;
    }
    .sidebar-card {
        position: static;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
        letter-spacing: -0.8px;
    }
    .section-title {
        font-size: 28px;
    }
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-canvas);
        border-bottom: 1px solid var(--color-hairline);
        flex-direction: column;
        gap: 0;
        padding: 8px 0;
    }
    .nav-menu.open {
        display: flex;
    }
    .nav-menu li {
        width: 100%;
    }
    .nav-menu a {
        display: block;
        padding: 12px 24px;
    }
    .nav-hamburger {
        display: flex;
    }
    .top-nav {
        position: relative;
    }
    .article-header h1 {
        font-size: 30px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .form-card {
        padding: 24px;
    }
}

@media (max-width: 640px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .hero {
        padding: 48px 0;
    }
    .hero h1 {
        font-size: 28px;
    }
    .section {
        padding: 48px 0;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .cookie-banner {
        flex-direction: column;
    }
    .cookie-actions {
        flex-direction: row;
        width: 100%;
    }
    .btn-cookie-accept, .btn-cookie-reject {
        flex: 1;
        text-align: center;
    }
}