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

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

:root {
    --color-canvas: #181818;
    --color-canvas-elevated: #303030;
    --color-canvas-light: #ffffff;
    --color-surface-soft-light: #f7f7f7;
    --color-surface-strong-light: #ebebeb;
    --color-primary: #da291c;
    --color-primary-active: #b01e0a;
    --color-hairline: #303030;
    --color-hairline-on-light: #d2d2d2;
    --color-ink: #ffffff;
    --color-body: #969696;
    --color-body-on-light: #181818;
    --color-muted: #666666;
    --color-on-primary: #ffffff;

    --sp-xxxs: 4px;
    --sp-xxs: 8px;
    --sp-xs: 16px;
    --sp-sm: 24px;
    --sp-md: 32px;
    --sp-lg: 48px;
    --sp-xl: 64px;
    --sp-xxl: 96px;
    --sp-super: 128px;

    --font: 'Inter', -apple-system, system-ui, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--color-canvas);
    color: var(--color-ink);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--sp-md);
}

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

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

.nav-logo {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--color-ink);
}

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

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

.nav-links a {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.65px;
    text-transform: uppercase;
    color: var(--color-body);
    transition: color 0.2s;
}

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

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp-xxs);
}

.nav-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
}

.nav-mobile {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    z-index: 99;
    padding: var(--sp-sm) var(--sp-md);
}

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

.nav-mobile ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
}

.nav-mobile ul a {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.65px;
    text-transform: uppercase;
    color: var(--color-body);
}

/* HERO */
.hero-band {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding-top: 64px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(24,24,24,0.2) 0%, rgba(24,24,24,0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: var(--sp-super) 0 var(--sp-xxl);
    width: 100%;
}

.hero-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--sp-sm);
}

.hero-h1 {
    font-size: 80px;
    font-weight: 500;
    line-height: 1.05;
    letter-spacing: -1.6px;
    color: var(--color-ink);
    max-width: 800px;
    margin-bottom: var(--sp-sm);
}

.hero-desc {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-body);
    max-width: 560px;
    margin-bottom: var(--sp-lg);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--sp-sm);
    flex-wrap: wrap;
}

/* BUTTONS */
.btn-primary {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-on-primary);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    padding: 14px 32px;
    height: 48px;
    line-height: 20px;
    border-radius: 0;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

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

.btn-outline {
    display: inline-block;
    background: transparent;
    color: var(--color-ink);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    padding: 14px 32px;
    height: 48px;
    line-height: 20px;
    border-radius: 0;
    border: 1px solid var(--color-ink);
    cursor: pointer;
    white-space: nowrap;
}

/* BADGE */
.badge {
    display: inline-block;
    background: var(--color-canvas-elevated);
    color: var(--color-ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 9999px;
}

/* SECTION TYPOGRAPHY */
.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--sp-xs);
}

.section-title {
    font-size: 36px;
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.36px;
    color: var(--color-ink);
    margin-bottom: var(--sp-sm);
}

.section-title-light {
    color: var(--color-body-on-light);
}

.section-subtitle {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-body);
    max-width: 560px;
    line-height: 1.6;
}

.section-subtitle-light {
    color: #555;
}

/* DARK BAND */
.band-dark {
    background: var(--color-canvas);
    padding: var(--sp-xxl) 0;
}

/* LIGHT BAND */
.band-light {
    background: var(--color-surface-soft-light);
    padding: var(--sp-xxl) 0;
}

/* ELEVATED BAND */
.band-elevated {
    background: var(--color-canvas-elevated);
    padding: var(--sp-xxl) 0;
}

/* ACCENT BAND */
.band-accent {
    background: var(--color-primary);
    padding: var(--sp-xxl) 0;
    text-align: center;
}

.band-accent .section-title {
    color: var(--color-on-primary);
}

/* CARD GRID */
.card-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-sm);
}

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

/* FEATURE CARD (DARK) */
.feature-card {
    background: var(--color-canvas-elevated);
    border-radius: 0;
    overflow: hidden;
}

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

.feature-card-body {
    padding: var(--sp-sm);
}

.feature-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.2;
    margin-bottom: var(--sp-xxs);
}

.feature-card-text {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-body);
    line-height: 1.5;
    margin-bottom: var(--sp-sm);
}

.feature-card-link {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.65px;
    text-transform: uppercase;
    color: var(--color-primary);
}

/* ARTICLE CARD (LIGHT BAND) */
.article-card {
    background: var(--color-canvas-light);
    border-radius: 0;
    border: 1px solid var(--color-hairline-on-light);
    overflow: hidden;
}

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

.article-card-body {
    padding: var(--sp-sm);
}

.article-card-meta {
    font-size: 12px;
    font-weight: 400;
    color: #888;
    margin-bottom: var(--sp-xxs);
}

.article-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-body-on-light);
    line-height: 1.2;
    margin-bottom: var(--sp-xxs);
}

.article-card-text {
    font-size: 14px;
    color: #555;
    line-height: 1.5;
    margin-bottom: var(--sp-sm);
}

.article-card-link {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.65px;
    text-transform: uppercase;
    color: var(--color-primary);
}

/* SPEC GRID */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-hairline);
    border: 1px solid var(--color-hairline);
}

.spec-cell {
    background: var(--color-canvas-elevated);
    padding: var(--sp-md) var(--sp-sm);
    text-align: center;
}

.spec-cell-value {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -1.6px;
    color: var(--color-ink);
    line-height: 1.0;
}

.spec-cell-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-body);
    margin-top: var(--sp-xxs);
}

/* CONTACT FORM */
.contact-form {
    background: var(--color-canvas-elevated);
    padding: var(--sp-md);
    max-width: 560px;
}

.form-group {
    margin-bottom: var(--sp-sm);
}

.form-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-body);
    margin-bottom: var(--sp-xxs);
}

.form-input {
    display: block;
    width: 100%;
    background: var(--color-canvas);
    color: var(--color-ink);
    font-family: var(--font);
    font-size: 14px;
    padding: 14px 16px;
    height: 48px;
    border-radius: 4px;
    border: 1px solid var(--color-hairline);
    outline: none;
}

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

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

.hairline-light {
    border-color: var(--color-hairline-on-light);
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--sp-lg);
    margin-bottom: var(--sp-xl);
}

.footer-brand-name {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--color-ink);
    margin-bottom: var(--sp-xs);
}

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

.footer-brand-desc {
    font-size: 13px;
    color: var(--color-body);
    line-height: 1.5;
    margin-bottom: var(--sp-sm);
}

.footer-contact-item {
    font-size: 13px;
    color: var(--color-body);
    line-height: 1.6;
}

.footer-col-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-ink);
    margin-bottom: var(--sp-sm);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--sp-xxs);
}

.footer-links a {
    font-size: 13px;
    color: var(--color-body);
    line-height: 1.4;
}

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

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

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

.footer-legal-links {
    display: flex;
    gap: var(--sp-sm);
    list-style: none;
}

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

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

/* ARTICLE PAGE */
.article-header {
    padding-top: 64px;
    background: var(--color-canvas);
}

.article-hero {
    position: relative;
    height: 480px;
    overflow: hidden;
}

.article-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(24,24,24,0.1) 0%, rgba(24,24,24,0.7) 100%);
}

.article-hero-content {
    position: absolute;
    bottom: var(--sp-lg);
    left: 0;
    right: 0;
    z-index: 2;
}

.article-meta-bar {
    background: var(--color-canvas-elevated);
    padding: var(--sp-sm) 0;
    border-bottom: 1px solid var(--color-hairline);
}

.article-meta-inner {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    flex-wrap: wrap;
}

.article-meta-item {
    font-size: 12px;
    font-weight: 400;
    color: var(--color-muted);
}

.article-body {
    padding: var(--sp-xxl) 0;
}

.article-content {
    max-width: 780px;
}

.article-content h1 {
    font-size: 36px;
    font-weight: 500;
    letter-spacing: -0.36px;
    color: var(--color-ink);
    line-height: 1.2;
    margin-bottom: var(--sp-sm);
}

.article-content h2 {
    font-size: 26px;
    font-weight: 500;
    letter-spacing: 0.195px;
    color: var(--color-ink);
    line-height: 1.5;
    margin-top: var(--sp-lg);
    margin-bottom: var(--sp-sm);
}

.article-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.2;
    margin-top: var(--sp-md);
    margin-bottom: var(--sp-xs);
}

.article-content p {
    font-size: 15px;
    font-weight: 400;
    color: var(--color-body);
    line-height: 1.7;
    margin-bottom: var(--sp-sm);
}

.article-content ul, .article-content ol {
    padding-left: var(--sp-md);
    color: var(--color-body);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: var(--sp-sm);
}

.article-content li {
    margin-bottom: var(--sp-xxs);
}

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

.article-content strong {
    color: var(--color-ink);
    font-weight: 700;
}

.article-content blockquote {
    border-left: 3px solid var(--color-primary);
    padding-left: var(--sp-sm);
    margin: var(--sp-md) 0;
    color: var(--color-body);
    font-size: 16px;
    font-style: italic;
}

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

.sidebar-card {
    background: var(--color-canvas-elevated);
    padding: var(--sp-sm);
    margin-bottom: var(--sp-sm);
}

.sidebar-card-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--color-body);
    margin-bottom: var(--sp-sm);
}

.sidebar-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--sp-xxs);
}

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

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

.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--sp-lg);
    align-items: start;
}

/* PAGE HEADER (inner pages) */
.page-header {
    padding: calc(64px + var(--sp-xxl)) 0 var(--sp-xxl);
    background: var(--color-canvas-elevated);
    border-bottom: 1px solid var(--color-hairline);
}

.page-h1 {
    font-size: 56px;
    font-weight: 500;
    letter-spacing: -1.12px;
    line-height: 1.1;
    color: var(--color-ink);
    margin-bottom: var(--sp-sm);
}

.page-desc {
    font-size: 16px;
    color: var(--color-body);
    max-width: 560px;
    line-height: 1.6;
}

/* COOKIE BANNER */
#cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    background: var(--color-canvas-elevated);
    border-top: 1px solid var(--color-hairline);
    padding: var(--sp-sm) var(--sp-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-md);
    flex-wrap: wrap;
}

.cookie-text {
    font-size: 13px;
    color: var(--color-body);
    max-width: 700px;
    line-height: 1.5;
}

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

.cookie-actions {
    display: flex;
    gap: var(--sp-xs);
    flex-shrink: 0;
}

/* INTERNAL LINKS BAND */
.internal-band {
    background: var(--color-canvas-elevated);
    padding: var(--sp-xxl) 0;
}

/* DISCLAIMER */
.disclaimer-box {
    background: var(--color-canvas-elevated);
    border-left: 3px solid var(--color-primary);
    padding: var(--sp-sm);
    margin-top: var(--sp-lg);
}

.disclaimer-box p {
    font-size: 13px;
    color: var(--color-body);
    line-height: 1.5;
}

/* SCHEMA / HIDDEN */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
}

/* UTILITY */
.mt-xs { margin-top: var(--sp-xs); }
.mt-sm { margin-top: var(--sp-sm); }
.mt-md { margin-top: var(--sp-md); }
.mt-lg { margin-top: var(--sp-lg); }
.mb-xs { margin-bottom: var(--sp-xs); }
.mb-sm { margin-bottom: var(--sp-sm); }
.mb-md { margin-bottom: var(--sp-md); }
.mb-lg { margin-bottom: var(--sp-lg); }
.text-center { text-align: center; }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .hero-h1 { font-size: 56px; letter-spacing: -1.12px; }
    .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .spec-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-md); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .page-h1 { font-size: 40px; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-hamburger { display: flex; }
    .hero-h1 { font-size: 36px; letter-spacing: -0.72px; }
    .section-title { font-size: 28px; }
    .card-grid-3 { grid-template-columns: 1fr; }
    .card-grid-2 { grid-template-columns: 1fr; }
    .spec-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    #cookie-banner { flex-direction: column; align-items: flex-start; }
    .page-h1 { font-size: 32px; }
    .hero-desc { font-size: 15px; }
}

@media (max-width: 640px) {
    .container { padding: 0 var(--sp-xs); }
    .hero-content { padding: var(--sp-xl) 0 var(--sp-lg); }
    .hero-h1 { font-size: 32px; }
    .band-dark, .band-light, .band-elevated { padding: var(--sp-xl) 0; }
    .spec-grid { grid-template-columns: 1fr 1fr; }
}