:root {
  --color-bg: #fdfaf5;
  --color-bg-alt: #ffffff;
  --color-primary: #4a90e2;
  --color-accent: #ff9fb6;
  --color-text: #333333;
  --color-muted: #777777;
  --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.06);
  --radius-card: 16px;
  --radius-pill: 999px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-base);
  background: radial-gradient(circle at top left, #ffeef4 0, #fdfaf5 40%, #f8fbff 100%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, 100% - 32px);
  margin: 0 auto;
}

.section {
  padding: var(--space-xl) 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.7);
}

.section h1,
.section h2 {
  margin-top: 0;
}

.section-intro {
  max-width: 640px;
  color: var(--color-muted);
}

.section-note {
  margin-top: var(--space-lg);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.section-subtitle {
  margin-top: var(--space-xl);
}

/* Header & Navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(253, 250, 245, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: var(--space-md);
}

.brand a {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0;
}

.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease, transform 0.1s ease;
}

.site-nav a:hover {
  background: rgba(74, 144, 226, 0.1);
  transform: translateY(-1px);
}

.site-nav a.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 36px;
  border-radius: 999px;
  border: none;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow-soft);
  padding: 8px;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 999px;
  background: var(--color-primary);
}

/* Hero */

.hero {
  padding: 40px 0 24px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  margin-bottom: var(--space-md);
}

.hero-text p {
  font-size: 1.02rem;
  color: var(--color-muted);
}

.hero-photo img {
  border-radius: 32px;
  box-shadow: var(--shadow-soft);
  object-fit: cover;
}

/* Grid & cards */

.grid {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card-img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.card-body {
  padding: 14px 16px 16px;
}

.card-body h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.card-body p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--color-muted);
}

.card-timeline .meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.card-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.9rem;
}

/* Photos page */

.album-section {
  margin-top: 32px;
}

.album-title {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.photo-card {
  margin: 0;
  padding: 10px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.photo-card img {
  border-radius: 12px;
}

.photo-card figcaption {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Timeline page */

.timeline {
  position: relative;
  margin-top: 32px;
  padding-left: 16px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-primary));
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding-left: 26px;
}

.timeline-dot {
  position: absolute;
  left: -1px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid #ffffff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 0 0 4px rgba(255, 159, 182, 0.2);
}

.timeline-content {
  background: rgba(255, 255, 255, 0.9);
  padding: 12px 14px 14px;
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
}

.timeline-content .meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin: 0 0 4px;
}

.timeline-content h2 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.timeline-content p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.timeline-media {
  margin-top: 10px;
}

/* Video blocks */

.video-frame {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.video-frame video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

/* Diary page */

.diary-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.diary-item {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
  padding: 14px 16px 16px;
}

.diary-header {
  margin-bottom: 6px;
}

.diary-header .meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin: 0 0 2px;
}

.diary-header h2 {
  margin: 0;
  font-size: 1rem;
}

.diary-preview p {
  margin: 4px 0 0;
  font-size: 0.95rem;
  color: var(--color-text);
}

.diary-details {
  margin-top: 6px;
}

.diary-details summary {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-primary);
}

.diary-details p {
  margin-top: 4px;
  font-size: 0.94rem;
  color: var(--color-muted);
}

.diary-media {
  margin-top: 8px;
}

/* About page */

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(0, 0.9fr);
  gap: 32px;
}

.about-main h1 {
  margin-top: 0;
}

.about-list {
  padding-left: 20px;
  color: var(--color-muted);
}

.about-aside .card {
  position: sticky;
  top: 88px;
}

/* Footer */

.site-footer {
  margin-top: 16px;
  padding: 18px 0 26px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.footer-inner {
  display: flex;
  justify-content: center;
  text-align: center;
}

/* Lightbox */

.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.lightbox-image {
  max-width: min(860px, 100%);
  max-height: min(90vh, 100%);
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.lightbox-backdrop[hidden] {
  display: none;
}

/* Responsive */

@media (max-width: 800px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-photo {
    order: -1;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-aside .card {
    position: static;
  }
}

@media (max-width: 640px) {
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: rgba(253, 250, 245, 0.98);
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
  }

  .site-header.nav-open .site-nav {
    max-height: 260px;
  }

  .site-nav ul {
    flex-direction: column;
    padding: 8px 16px 12px;
    gap: 4px;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding: 28px 0;
  }
}