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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;
}

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

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

body {
  background: var(--canvas);
  color: var(--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: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

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

h1 { font-size: 2.5rem; letter-spacing: -0.045em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.375rem; letter-spacing: -0.01em; }
h4 { font-size: 1.125rem; font-weight: 600; letter-spacing: 0; line-height: 1.4; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.caption-upper {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
}

.text-muted { color: var(--muted); }
.text-body { color: var(--body); }
.text-ink { color: var(--ink); }

/* ── Navigation ─────────────────────────── */
.site-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--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-logo {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--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(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

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

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

.nav-mobile a {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--body);
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.nav-mobile a:last-child {
  border-bottom: none;
}

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  border-radius: 8px;
  padding: 10px 18px;
  height: 40px;
  cursor: pointer;
  border: none;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

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

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

.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
}

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

.btn-dark {
  background: var(--ink);
  color: var(--canvas);
  padding: 12px 20px;
  height: 44px;
}

.btn-dark:hover {
  background: #3a3930;
  color: var(--canvas);
}

/* ── Hero ─────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--hairline);
}

.hero-label {
  display: inline-flex;
  align-items: center;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: 9999px;
  padding: 4px 12px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  letter-spacing: -0.045em;
  color: var(--ink);
  max-width: 760px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 17px;
  color: var(--body);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-image {
  margin-top: 48px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--hairline);
  max-height: 420px;
}

.hero-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

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

.section-sm {
  padding: 48px 0;
}

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

.section-title {
  font-size: 2rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.5;
}

.section-header {
  margin-bottom: 48px;
}

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

/* ── Cards ───────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
}

.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}

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

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

.article-card-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

.article-card-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-card-excerpt {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 16px;
}

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

/* ── Article Content ─────────────────────── */
.article-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}

.article-header .container {
  max-width: 760px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--muted);
}

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

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

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

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

.article-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 20px;
}

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

.article-header-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-hero-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  margin-top: 40px;
}

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

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

.article-body h2 {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 40px 0 16px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 12px;
  letter-spacing: -0.01em;
}

.article-body p {
  color: var(--body);
  margin-bottom: 18px;
  font-size: 16px;
  line-height: 1.65;
}

.article-body ul, .article-body ol {
  margin: 0 0 18px 0;
  padding-left: 20px;
  list-style: initial;
}

.article-body ol {
  list-style: decimal;
}

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

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

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

.info-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
  margin: 32px 0;
}

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

.inline-img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  margin: 32px 0;
  height: 340px;
  object-fit: cover;
}

.ref-list {
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
  margin-top: 48px;
}

.ref-list h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.ref-list ul {
  list-style: none;
  padding: 0;
}

.ref-list li {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  line-height: 1.4;
}

.ref-list li a {
  color: var(--body);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.updated-date {
  font-size: 13px;
  color: var(--muted-soft);
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline-soft);
}

/* ── Feature List ────────────────────────── */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  margin: 32px 0;
}

.feature-item {
  background: var(--surface-card);
  padding: 20px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-item-num {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.5px;
  min-width: 24px;
  padding-top: 2px;
}

.feature-item-content h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.feature-item-content p {
  font-size: 14px;
  color: var(--body);
  margin: 0;
}

/* ── Contact Form ────────────────────────── */
.contact-section {
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 12px;
}

.contact-info p {
  color: var(--body);
  font-size: 15px;
  margin-bottom: 24px;
}

.contact-detail {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.contact-form {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 32px;
}

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

.form-group:last-of-type {
  margin-bottom: 24px;
}

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

.form-control {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 12px 16px;
  height: 44px;
  font-size: 15px;
  color: var(--ink);
  font-family: inherit;
  transition: border-color 0.15s;
  outline: none;
}

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

.form-control::placeholder {
  color: var(--muted-soft);
}

.form-control.error {
  border-color: var(--semantic-error);
}

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

.form-error {
  font-size: 12px;
  color: var(--semantic-error);
  margin-top: 4px;
  display: none;
}

.form-success {
  background: #f0faf5;
  border: 1px solid var(--semantic-success);
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--semantic-success);
  display: none;
  margin-top: 16px;
}

.form-loading {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-top: 16px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--hairline);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.5;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

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

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

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

.footer-bottom p {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

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

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

.footer-disclaimer {
  font-size: 12px;
  color: var(--muted-soft);
  margin-top: 16px;
  line-height: 1.5;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 16px;
}

/* ── Cookie Banner ───────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  padding: 20px 24px;
  z-index: 999;
  display: none;
}

.cookie-banner.show {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-banner p {
  font-size: 14px;
  color: var(--body);
  margin: 0;
  flex: 1;
  min-width: 240px;
}

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

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

/* ── Page Hero (inner pages) ─────────────── */
.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 17px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.6;
  margin: 0;
}

.page-content {
  padding: 64px 0 80px;
}

.page-content h2 {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 40px 0 16px;
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}

.page-content p {
  color: var(--body);
  font-size: 16px;
  line-height: 1.65;
  margin-bottom: 16px;
  max-width: 720px;
}

.page-content ul, .page-content ol {
  padding-left: 20px;
  list-style: initial;
  margin-bottom: 16px;
  max-width: 720px;
}

.page-content ol {
  list-style: decimal;
}

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

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

/* ── About ───────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
}

.stat-item {
  background: var(--surface-card);
  padding: 20px 24px;
}

.stat-item .stat-num {
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

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

/* ── Responsive ──────────────────────────── */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  h1 { font-size: 1.875rem; }
  .hero { padding: 48px 0 40px; }
  .section { padding: 48px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cookie-banner.show { flex-direction: column; align-items: flex-start; }
  .article-hero-img { height: 220px; }
  .hero-image img { height: 220px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .contact-form { padding: 20px; }
}