@import "tailwindcss";

:root {
  --background: #f4f7fb;
  --foreground: #0c1929;
  --muted: #5b6b7c;
  --accent: #0d9488;
  --accent-secondary: #ea580c;
  --accent-tertiary: #0284c7;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --border: rgba(13, 148, 136, 0.14);
  --gradient-1: #0d9488;
  --gradient-2: #f59e0b;
  --gradient-3: #0284c7;
  --glow-sm: 0 8px 32px rgba(13, 148, 136, 0.2);
  --glow-lg: 0 24px 64px rgba(234, 88, 12, 0.18);
  --mesh-1: rgba(13, 148, 136, 0.32);
  --mesh-2: rgba(245, 158, 11, 0.26);
  --mesh-3: rgba(2, 132, 199, 0.22);
  --prose: #334155;
  --card-shadow: 0 4px 24px rgba(12, 25, 41, 0.07);
  --callout-bg: rgba(13, 148, 136, 0.08);
  --callout-border: rgba(13, 148, 136, 0.22);
  --read-max: 42rem;
  --header-h: 4.25rem;
}

.dark {
  --background: #060d18;
  --foreground: #e8eef4;
  --muted: #8fa3b8;
  --accent: #2dd4bf;
  --accent-secondary: #fb923c;
  --accent-tertiary: #38bdf8;
  --surface: rgba(12, 25, 41, 0.72);
  --surface-solid: #0c1929;
  --border: rgba(45, 212, 191, 0.14);
  --gradient-1: #14b8a6;
  --gradient-2: #fb923c;
  --gradient-3: #38bdf8;
  --glow-sm: 0 8px 32px rgba(20, 184, 166, 0.22);
  --glow-lg: 0 24px 64px rgba(251, 146, 60, 0.16);
  --mesh-1: rgba(20, 184, 166, 0.35);
  --mesh-2: rgba(251, 146, 60, 0.28);
  --mesh-3: rgba(56, 189, 248, 0.25);
  --prose: #b8c5d4;
  --card-shadow: 0 4px 28px rgba(0, 0, 0, 0.4);
  --callout-bg: rgba(20, 184, 166, 0.1);
  --callout-border: rgba(45, 212, 191, 0.25);
}

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-muted: var(--muted);
  --color-accent: var(--accent);
  --color-surface: var(--surface);
  --color-border: var(--border);
  --font-sans: var(--font-dm-sans);
  --font-serif: var(--font-source-serif);
  --font-display: var(--font-plus-jakarta);
}

html {
  color-scheme: light;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

html.dark {
  color-scheme: dark;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-dm-sans), system-ui, sans-serif;
}

/* Latitude grid + ambient mesh */
.mesh-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(13, 148, 136, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 148, 136, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.dark .mesh-bg {
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.06) 1px, transparent 1px);
}

.mesh-bg::before,
.mesh-bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(88px);
  animation: mesh-float 20s ease-in-out infinite alternate;
}

.mesh-bg::before {
  width: min(72vw, 540px);
  height: min(72vw, 540px);
  top: -14%;
  right: -6%;
  background: radial-gradient(circle, var(--mesh-1), transparent 68%);
}

.mesh-bg::after {
  width: min(58vw, 420px);
  height: min(58vw, 420px);
  bottom: 8%;
  left: -12%;
  background: radial-gradient(circle, var(--mesh-2), transparent 70%);
  animation-delay: -7s;
}

.mesh-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(76px);
  animation: mesh-float 24s ease-in-out infinite alternate-reverse;
}

.mesh-orb--sky {
  width: min(48vw, 340px);
  height: min(48vw, 340px);
  top: 42%;
  left: 38%;
  background: radial-gradient(circle, var(--mesh-3), transparent 70%);
}

@keyframes mesh-float {
  0% {
    transform: translate(0, 0) scale(1);
  }
  100% {
    transform: translate(20px, -28px) scale(1.06);
  }
}

.gradient-text {
  background: linear-gradient(
    125deg,
    var(--gradient-1) 0%,
    var(--gradient-2) 45%,
    var(--gradient-3) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px);
  box-shadow: var(--card-shadow);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 3rem;
  padding-inline: 1.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(
    125deg,
    var(--gradient-1),
    var(--gradient-2),
    var(--gradient-3)
  );
  background-size: 200% 200%;
  box-shadow: var(--glow-sm);
  transition: transform 0.2s, box-shadow 0.2s, background-position 0.4s;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow-lg);
  background-position: 100% 50%;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 3rem;
  padding-inline: 1.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--foreground);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.btn-secondary:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: var(--glow-sm);
  transform: translateY(-1px);
}

.font-display {
  font-family: var(--font-plus-jakarta), var(--font-dm-sans), system-ui, sans-serif;
}

.cover-float {
  animation: cover-float 7s ease-in-out infinite;
}

@keyframes cover-float {
  0%,
  100% {
    transform: translateY(0) rotate(-0.5deg);
  }
  50% {
    transform: translateY(-12px) rotate(0.5deg);
  }
}

/* Hub marquee */
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 42s linear infinite;
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* Reading progress */
.reading-progress {
  position: fixed;
  top: var(--header-h);
  left: 0;
  z-index: 40;
  height: 3px;
  width: 100%;
  background: transparent;
  pointer-events: none;
}

.reading-progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--gradient-1),
    var(--gradient-2),
    var(--gradient-3)
  );
  transition: width 0.1s linear;
  box-shadow: 0 0 12px color-mix(in srgb, var(--gradient-1) 50%, transparent);
}

/* Prose */
.prose-ebook {
  font-size: 1.0625rem;
  line-height: 1.88;
}

.prose-ebook h2 {
  font-family: var(--font-source-serif), Georgia, serif;
  font-size: clamp(1.4rem, 3.2vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 0.5rem;
  color: var(--foreground);
}

.prose-ebook .chapter-lead {
  font-size: 0.9375rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.prose-ebook p {
  color: var(--prose);
  margin-bottom: 1.25rem;
}

.prose-ebook p:last-child {
  margin-bottom: 0;
}

.prose-ebook strong {
  color: var(--foreground);
  font-weight: 600;
}

.prose-ebook ul {
  margin: 1rem 0 1.35rem;
  padding-left: 1.35rem;
  list-style: disc;
}

.prose-ebook li {
  color: var(--prose);
  margin-bottom: 0.55rem;
}

.prose-ebook ol {
  margin: 1rem 0 1.35rem;
  padding-left: 1.35rem;
  list-style: decimal;
}

.prose-ebook blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem 1rem 1.25rem;
  border-left: 3px solid var(--gradient-1);
  border-radius: 0 0.75rem 0.75rem 0;
  background: var(--callout-bg);
  border-top: 1px solid var(--callout-border);
  border-right: 1px solid var(--callout-border);
  border-bottom: 1px solid var(--callout-border);
  font-size: 0.98rem;
  color: var(--foreground);
  font-style: normal;
}

.prose-ebook blockquote p {
  margin: 0;
  color: inherit;
}

/* TOC active state */
.toc-link--active {
  background: color-mix(in srgb, var(--gradient-1) 12%, transparent);
  color: var(--foreground);
  font-weight: 600;
}

.toc-link--active .toc-index {
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-3));
  color: white;
}

@media (prefers-reduced-motion: reduce) {
  .cover-float,
  .marquee-track,
  .mesh-bg::before,
  .mesh-bg::after,
  .mesh-orb {
    animation: none;
  }

  .btn-primary:hover,
  .btn-secondary:hover {
    transform: none;
  }
}