@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-body-strong: #26251e;
  --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;

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

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

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

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

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

body {
  background: var(--color-canvas);
  color: var(--color-body);
  font-family: var(--font-sans);
  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; }
ul, ol { list-style: none; }

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

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

.nav-inner {
  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: -0.02em;
}

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

.nav-links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

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

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

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

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

.mobile-menu {
  display: none;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  padding: var(--space-base) 0;
}

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

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu.open { display: block; }

/* ── HERO ── */
.hero {
  padding: var(--space-section) 0;
  text-align: center;
}

.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: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--color-ink);
  max-width: 900px;
  margin: 0 auto var(--space-lg);
}

.hero-sub {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto var(--space-xxl);
  line-height: 1.5;
}

.hero-image {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-hairline);
}

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

/* ── SECTIONS ── */
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--color-canvas-soft); }
.section-border { border-top: 1px solid var(--color-hairline); }

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

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

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

/* ── CARDS GRID ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

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

.card-icon {
  width: 40px;
  height: 40px;
  background: var(--color-surface-strong);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-base);
  font-size: 18px;
}

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

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

/* ── ARTICLE CARDS ── */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

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

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

.article-card-body { padding: var(--space-lg); }

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

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

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

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

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

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

.article-header h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--color-ink);
  line-height: 1.15;
  max-width: 760px;
  margin-bottom: var(--space-base);
}

.article-meta {
  font-size: 13px;
  color: var(--color-muted);
  display: flex;
  gap: var(--space-base);
  flex-wrap: wrap;
  margin-top: var(--space-base);
}

.article-body {
  max-width: 760px;
  padding: var(--space-section) 0;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--color-ink);
  line-height: 1.25;
  margin: var(--space-xxl) 0 var(--space-base);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.4;
  margin: var(--space-xl) 0 var(--space-sm);
}

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

.article-body ul,
.article-body ol {
  margin: var(--space-base) 0 var(--space-base) var(--space-xl);
  list-style: disc;
}

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

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

.article-body img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-hairline);
  margin: var(--space-xl) 0;
  width: 100%;
}

.article-body .caption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: calc(-1 * var(--space-base));
  margin-bottom: var(--space-xl);
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

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

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  font-size: 14px;
}

.data-table th {
  background: var(--color-surface-strong);
  color: var(--color-ink);
  font-weight: 600;
  text-align: left;
  padding: var(--space-sm) var(--space-base);
  border-bottom: 2px solid var(--color-hairline-strong);
}

.data-table td {
  padding: var(--space-sm) var(--space-base);
  color: var(--color-body);
  border-bottom: 1px solid var(--color-hairline-soft);
  vertical-align: top;
}

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

/* ── CALENDAR SECTION ── */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-base);
  margin-top: var(--space-xxl);
}

.calendar-month {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-base);
}

.calendar-month-name {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-xs);
}

.calendar-month-task {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--space-xxs);
}

.calendar-month-detail {
  font-size: 13px;
  color: var(--color-body);
  line-height: 1.4;
}

.tag-pill {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-ink);
  background: var(--color-surface-strong);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-sm);
}

/* ── FORM ── */
.contact-section { padding: var(--space-section) 0; }

.contact-form {
  max-width: 560px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xxl);
}

.form-group { margin-bottom: var(--space-lg); }

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

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 16px;
  font-family: var(--font-sans);
  color: var(--color-ink);
  height: 44px;
  transition: border-color 0.15s;
  outline: none;
}

.form-group textarea {
  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: var(--space-xs);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

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

.btn-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.form-message {
  margin-top: var(--space-base);
  padding: var(--space-sm) var(--space-base);
  border-radius: var(--radius-md);
  font-size: 14px;
  display: none;
}

.form-message.success {
  background: #e8f5ef;
  color: var(--color-semantic-success);
  border: 1px solid #b6dece;
  display: block;
}

.form-message.error {
  background: #fde8ec;
  color: var(--color-semantic-error);
  border: 1px solid #f0b8c2;
  display: block;
}

/* ── COOKIE BANNER ── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-ink);
  color: var(--color-canvas);
  padding: var(--space-base) var(--space-xl);
  z-index: 999;
  display: none;
}

.cookie-banner.visible { display: block; }

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

.cookie-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
  color: #c8c5bd;
  min-width: 280px;
}

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

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

.btn-cookie-accept {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

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

.btn-cookie-reject {
  background: transparent;
  color: var(--color-canvas);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.25);
  cursor: pointer;
  transition: border-color 0.15s;
}

.btn-cookie-reject:hover { border-color: rgba(255,255,255,0.5); }

/* ── 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;
  gap: var(--space-xxl);
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

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

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  max-width: 260px;
}

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

.footer-links { display: flex; flex-direction: column; gap: var(--space-sm); }

.footer-links a {
  font-size: 14px;
  color: var(--color-body);
  transition: color 0.15s;
}

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

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

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

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

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

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

.page-header h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--color-ink);
  line-height: 1.15;
}

.page-header .page-meta {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: var(--space-sm);
}

.page-content {
  max-width: 760px;
  padding: var(--space-section) 0;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--color-ink);
  margin: var(--space-xxl) 0 var(--space-base);
}

.page-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin: var(--space-xl) 0 var(--space-sm);
}

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

.page-content ul,
.page-content ol {
  margin: var(--space-base) 0 var(--space-base) var(--space-xl);
  list-style: disc;
}

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

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

.page-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.disclaimer-box {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-muted);
  border-radius: var(--radius-md);
  padding: var(--space-base) var(--space-lg);
  margin: var(--space-xl) 0;
}

.disclaimer-box p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ── BREADCRUMB ── */
.breadcrumb {
  padding: var(--space-base) 0;
  border-bottom: 1px solid var(--color-hairline-soft);
}

.breadcrumb ul {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  list-style: none;
  font-size: 13px;
  color: var(--color-muted);
}

.breadcrumb ul li::after {
  content: '/';
  margin-left: var(--space-sm);
  color: var(--color-muted-soft);
}

.breadcrumb ul li:last-child::after { content: ''; }

.breadcrumb ul li a {
  color: var(--color-muted);
  transition: color 0.15s;
}

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

.breadcrumb ul li:last-child { color: var(--color-ink); }

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

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

@media (max-width: 768px) {
  .container { padding: 0 var(--space-base); }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero { padding: var(--space-xxl) 0; }
  .hero h1 { font-size: 36px; letter-spacing: -1px; }
  .hero-sub { font-size: 16px; }
  .hero-image img { height: 260px; }
  .section { padding: var(--space-xxl) 0; }
  .section-title { font-size: 28px; }
  .cards-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .calendar-grid { grid-template-columns: 1fr 1fr; }
  .article-header h1 { font-size: 32px; letter-spacing: -0.5px; }
  .page-header h1 { font-size: 32px; letter-spacing: -0.5px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .contact-form { padding: var(--space-xl); }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 28px; }
  .calendar-grid { grid-template-columns: 1fr; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
  .article-header h1 { font-size: 26px; }
}