@tailwind base;
@tailwind components;
@tailwind utilities;

:root {
  --motion-duration-short: 180ms;
  --motion-duration-medium: 260ms;
  --motion-ease-snappy: cubic-bezier(0.32, 0.72, 0, 1);
  --card-translate-y: -6px;
  --line-height-body: clamp(1.5, 0.15vw + 1.45, 1.65);
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-system-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'PingFang TC', 'PingFang SC', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Segoe UI Variable Text', 'Segoe UI', 'Microsoft JhengHei', 'Microsoft YaHei', 'Noto Sans TC', 'Noto Sans SC', 'Noto Sans CJK TC', 'Noto Sans CJK SC', 'Source Han Sans TC', 'Source Han Sans SC', 'Roboto', 'Ubuntu', 'Cantarell', 'Inter', 'Helvetica Neue', Arial, sans-serif;

  font-size: clamp(15px, 0.65vw + 11px, 19px);
}

@media (min-width: 2560px) {
  :root {
    font-size: 20px;
  }
}

body {
  @apply bg-white text-gray-900 transition-colors duration-200 ease-snappy dark:bg-gray-950 dark:text-gray-100;
  font-size: 1rem;
  line-height: var(--line-height-body);
  font-family: var(--font-system-sans);
}

@keyframes timeline-scroll {
  0% {
    transform: translate(-50%, -10%);
    opacity: 0;
  }

  15% {
    opacity: 1;
  }

  85% {
    opacity: 1;
  }

  100% {
    transform: translate(-50%, 110%);
    opacity: 0;
  }
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-transition {
  opacity: 0;
}

/* Scroll reveal animations - CSS only */
.scroll-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s cubic-bezier(0.32, 0.72, 0, 1),
              transform 0.5s cubic-bezier(0.32, 0.72, 0, 1);
}

.scroll-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  .scroll-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}


.toc-target-highlight {
  @apply bg-yellow-50/60 dark:bg-yellow-900/40 transition-colors duration-500;
}

/* Subtle hover for article elements */
.prose blockquote {
  @apply transition-transform transition-shadow duration-180 ease-snappy;
  border-left: 4px solid var(--color-accent, #2563eb);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(37, 99, 235, 0.08));
  padding: 1.2rem 1.5rem;
  font-style: italic;
  color: rgba(15, 23, 42, 0.75);
  position: relative;
}

.dark .prose blockquote {
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.12), rgba(96, 165, 250, 0.06));
  color: rgba(226, 232, 240, 0.8);
  border-left-color: rgba(96, 165, 250, 0.9);
}

.prose blockquote:hover {
  @apply -translate-y-0.5 shadow-sm;
}

.prose blockquote::before {
  content: '“';
  position: absolute;
  top: 0.5rem;
  left: 0.8rem;
  font-size: 3rem;
  font-family: 'Times New Roman', 'Noto Serif TC', serif;
  color: rgba(37, 99, 235, 0.25);
  pointer-events: none;
}

.prose pre {
  @apply transition-transform transition-shadow duration-180 ease-snappy;
}

.prose pre:hover {
  @apply -translate-y-0.5 shadow-md;
}

.prose {
  font-size: clamp(1rem, 0.2vw + 0.9rem, 1.2rem);
  line-height: var(--line-height-body);
}

.prose h1 {
  font-size: clamp(2.2rem, 1.4rem + 2.2vw, 3.4rem);
  line-height: 1.25;
}

.prose h2 {
  font-size: clamp(1.8rem, 1.1rem + 1.6vw, 2.8rem);
  line-height: 1.3;
}

.prose h3 {
  font-size: clamp(1.4rem, 0.9rem + 1vw, 2rem);
  line-height: 1.35;
}

.prose p,
.prose li {
  font-size: clamp(1rem, 0.2vw + 0.9rem, 1.15rem);
  line-height: var(--line-height-body);
}

.prose small,
.prose figcaption {
  font-size: clamp(0.85rem, 0.2vw + 0.8rem, 0.95rem);
}

.prose h1>a,
.prose h2>a,
.prose h3>a,
.prose h4>a,
.prose h5>a,
.prose h6>a {
  text-decoration: none !important;
  color: inherit !important;
}

.hero-title {
  position: relative;
  display: inline-flex;
  overflow: hidden;
}

.hero-title__sweep {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 10%, rgba(59, 130, 246, 0.35) 45%, transparent 90%);
  transform: translateX(-120%);
  animation: hero-sweep 4s var(--motion-ease-snappy) infinite;
  pointer-events: none;
}


@keyframes hero-sweep {
  0% {
    transform: translateX(-120%);
    opacity: 0;
  }

  30% {
    opacity: 0.4;
  }

  60% {
    transform: translateX(120%);
    opacity: 0;
  }

  100% {
    transform: translateX(120%);
    opacity: 0;
  }
}

.tag-chip {
  position: relative;
  overflow: hidden;
  transition: color var(--motion-duration-short) var(--motion-ease-snappy), background-color var(--motion-duration-short) var(--motion-ease-snappy);
}

.tag-chip::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: currentColor;
  opacity: 0.5;
  transition: width var(--motion-duration-short) var(--motion-ease-snappy), left var(--motion-duration-short) var(--motion-ease-snappy);
}

.tag-chip:hover::after,
.tag-chip:focus-visible::after {
  width: 100%;
  left: 0;
}

@layer components {
  .type-display {
    font-size: clamp(2.2rem, 1.6rem + 2.4vw, 3.5rem);
    line-height: 1.2;
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-serif-eng), "Songti SC", serif;
  }

  .type-title {
    font-size: clamp(1.6rem, 1.1rem + 1.4vw, 2.6rem);
    line-height: 1.3;
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-serif-eng), "Songti SC", serif;
    letter-spacing: 0.02em;
  }

  .type-subtitle {
    font-size: clamp(1.25rem, 0.9rem + 1vw, 1.9rem);
    line-height: 1.35;
    font-weight: var(--font-weight-medium);
    font-family: var(--font-serif-eng), "Songti SC", serif;
    letter-spacing: 0.02em;
  }

  .type-body {
    font-size: clamp(1rem, 0.2vw + 0.9rem, 1.15rem);
    line-height: var(--line-height-body);
    font-weight: var(--font-weight-regular);
  }

  .type-small {
    font-size: clamp(0.85rem, 0.2vw + 0.8rem, 0.95rem);
    line-height: 1.4;
    font-weight: var(--font-weight-regular);
  }

  h1 {
    font-weight: 700;
    letter-spacing: -0.03em;
    font-family: var(--font-serif-eng), "Songti SC", serif;
  }

  h2 {
    font-weight: 600;
    letter-spacing: -0.02em;
    font-family: var(--font-serif-eng), "Songti SC", serif;
  }

  .type-nav {
    font-size: clamp(0.95rem, 0.2vw + 0.85rem, 1.05rem);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.04em;
  }

  .motion-card {
    transition: transform var(--motion-duration-medium) var(--motion-ease-snappy),
      box-shadow var(--motion-duration-medium) var(--motion-ease-snappy),
      background-color var(--motion-duration-medium) var(--motion-ease-snappy),
      border-color var(--motion-duration-medium) var(--motion-ease-snappy);
  }

  .motion-card:hover {
    transform: translateY(var(--card-translate-y));
  }

  .motion-link {
    transition: color var(--motion-duration-short) var(--motion-ease-snappy),
      transform var(--motion-duration-short) var(--motion-ease-snappy);
  }
}

/* Pagefind Search Styles - Use CSS variables to override defaults */
:root {
  --pagefind-ui-scale: 1;
  --pagefind-ui-primary: #2563eb;
  --pagefind-ui-text: #0f172a;
  --pagefind-ui-background: #ffffff;
  --pagefind-ui-border: #e2e8f0;
  --pagefind-ui-tag: #f1f5f9;
  --pagefind-ui-border-width: 1px;
  --pagefind-ui-border-radius: 0.5rem;
  --pagefind-ui-font: var(--font-system-sans);
}

.dark {
  --pagefind-ui-primary: #60a5fa;
  --pagefind-ui-text: #f1f5f9;
  --pagefind-ui-background: #0f172a;
  --pagefind-ui-border: #475569;
  --pagefind-ui-tag: #334155;
}

/* Enhanced text colors for better readability */
.pagefind-ui__result-title {
  color: var(--pagefind-ui-text) !important;
}

.dark .pagefind-ui__result-title {
  color: #f8fafc !important;
}

.pagefind-ui__result-excerpt {
  color: #475569 !important;
}

.dark .pagefind-ui__result-excerpt {
  color: #cbd5e1 !important;
}

.pagefind-ui__result-link {
  color: var(--pagefind-ui-primary) !important;
}

.dark .pagefind-ui__result-link {
  color: #93c5fd !important;
}

/* Additional custom styling for highlights */
.pagefind-ui__result-excerpt mark {
  @apply bg-yellow-200 font-semibold text-slate-900 dark:bg-yellow-600 dark:text-slate-100;
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
}

.pagefind-ui__search-input:focus {
  @apply ring-2 ring-blue-500 dark:ring-blue-400;
}