/* site.css — Dokkodo component & layout styles */

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 12, 12, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-interactive);
}
[data-theme="light"] .site-header {
  background: rgba(245, 244, 240, 0.85);
}

.site-nav {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  transition: opacity var(--transition-interactive);
}
.nav-logo:hover { opacity: 0.8; color: var(--color-text); }
.logo-svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.nav-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-link {
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-text);
}
.nav-link-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
  margin-left: var(--space-2);
}
.theme-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-dynamic);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text);
}

/* Mobile overlay */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(12, 12, 12, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
[data-theme="light"] .mobile-menu-overlay {
  background: rgba(245, 244, 240, 0.95);
}
.mobile-menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}
.mobile-nav-link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.mobile-nav-link:hover { color: var(--color-primary); }
.mobile-theme-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  width: auto;
}
.mobile-theme-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ============================================
   HERO
   ============================================ */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-4);
  position: relative;
  overflow: hidden;
}
.hero-inner {
  max-width: var(--content-default);
  position: relative;
  z-index: 1;
}
.hero-kanji {
  font-size: clamp(6rem, 15vw, 16rem);
  line-height: 1;
  color: var(--color-text-faint);
  opacity: 0.08;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  pointer-events: none;
  font-weight: 300;
}
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 1;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}
.hero-divider {
  width: 48px;
  height: 1px;
  background: var(--color-primary);
  margin: 0 auto var(--space-6);
  opacity: 0.6;
}
.hero-description {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-faint);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: clamp(var(--space-8), 6vw, var(--space-16)) var(--space-4);
}
.section-container {
  max-width: var(--content-wide);
  margin-inline: auto;
}
.section-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

/* ============================================
   PILLAR CARDS
   ============================================ */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-4);
}

.pillar-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
  cursor: pointer;
  position: relative;
}
.pillar-card:hover {
  border-color: rgba(255, 255, 255, 0.14);
  background: var(--color-surface-2);
}
[data-theme="light"] .pillar-card:hover {
  border-color: rgba(0, 0, 0, 0.15);
}
.pillar-card:active {
  background: var(--color-surface-offset);
}

.pillar-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.pillar-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}
.pillar-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--space-4);
}
.pillar-arrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive), transform var(--transition-interactive);
  align-self: flex-start;
}
.pillar-card:hover .pillar-arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ============================================
   POSTS LIST
   ============================================ */
.posts-list {
  display: flex;
  flex-direction: column;
}

.post-item {
  display: block;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-divider);
  text-decoration: none;
  color: var(--color-text);
  transition: background var(--transition-interactive);
  cursor: pointer;
}
.post-item:first-child {
  padding-top: 0;
}
.post-item:last-child {
  border-bottom: none;
}
.post-item:hover {
  color: var(--color-text);
}
.post-item:hover .post-item-title {
  color: var(--color-primary-hover);
}

.post-item-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.post-item-category {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}
.post-item-date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.post-item-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  transition: color var(--transition-interactive);
  line-height: 1.3;
  color: var(--color-text);
}
.post-item-excerpt {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 65ch;
}

/* ============================================
   CATEGORY VIEW
   ============================================ */
.category-hero {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-4) var(--space-8);
}
.category-hero .section-container {
  max-width: var(--content-wide);
}
.back-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-6);
  transition: color var(--transition-interactive);
}
.back-link:hover { color: var(--color-text); }

#category-label {
  display: block;
  margin-bottom: var(--space-3);
}
.category-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  line-height: 1.1;
  color: var(--color-text);
}
.category-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.65;
}

/* ============================================
   POST VIEW
   ============================================ */
.post-article {
  padding-bottom: var(--space-16);
}
.post-header {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-4) var(--space-8);
}
.post-header .section-container {
  max-width: 68ch;
  margin-inline: auto;
}
.post-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  line-height: 1.1;
  max-width: 20ch;
  color: var(--color-text);
}
#post-category-label {
  display: block;
  margin-bottom: var(--space-3);
}
.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.post-meta-sep { opacity: 0.4; }

.post-body {
  max-width: 68ch;
  margin-inline: auto;
  padding-inline: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
}
.post-body h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.post-body h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.post-body p {
  margin-bottom: var(--space-6);
  max-width: 68ch;
}
.post-body blockquote {
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.post-body ul, .post-body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}
.post-body li {
  margin-bottom: var(--space-2);
}
.post-body hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: var(--space-10) 0;
}
.post-body .post-end-mark {
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-4);
  margin-top: var(--space-16);
}
.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-sep { opacity: 0.3; }
.footer-tagline { opacity: 0.5; }
.footer-right {
  display: flex;
  gap: var(--space-4);
}
.footer-social {
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}
.footer-social:hover { color: var(--color-text); }
.footer-social svg { display: inline-block; }

/* ============================================
   VIEW TRANSITIONS
   ============================================ */
.view {
  opacity: 1;
  transition: opacity 200ms cubic-bezier(0.16, 1, 0.3, 1);
}
.view.exiting {
  opacity: 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hero {
    min-height: 55vh;
    padding: var(--space-12) var(--space-4);
  }
  .hero-kanji {
    font-size: clamp(4rem, 20vw, 10rem);
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .post-title {
    max-width: none;
  }
  .post-item-title {
    font-size: var(--text-base);
  }
  .category-title {
    font-size: var(--text-2xl);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Active tap states for mobile */
@media (hover: none) {
  .pillar-card:active {
    background: var(--color-surface-dynamic);
  }
  .post-item:active {
    background: var(--color-surface);
  }
  .nav-link:active, .mobile-nav-link:active {
    color: var(--color-primary);
  }
}