/* ============================================================
   Glitter.land Design System
   Warm salon aesthetic — candlelit, not clinical
   ============================================================ */

/* ------------------------------------------------------------
   Font Imports
   ------------------------------------------------------------ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@100..900&family=Source+Serif+4:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500;1,600;1,700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ------------------------------------------------------------
   Design Tokens
   ------------------------------------------------------------ */

:root {
  /* Opal accent scale */
  --gl-opal-300: #7adace;
  --gl-opal-400: #56dbd0;
  --gl-opal-500: #2fb8ad;
  --gl-opal-600: #0d9488;

  /* Warm salon palette — gold */
  --gl-gold-100: #fef3c7;
  --gl-gold-200: #fde68a;
  --gl-gold-300: #fcd34d;
  --gl-gold-400: #d4a853;
  --gl-gold-500: #b8941f;

  /* Warm salon palette — rose */
  --gl-rose-100: #ffe4e6;
  --gl-rose-200: #fecdd3;
  --gl-rose-300: #e8a0a8;

  /* Warm neutrals (candlelit, not clinical) */
  --gl-warm-50:  #faf8f5;
  --gl-warm-100: #f5f1eb;
  --gl-warm-200: #ede6dc;
  --gl-warm-300: #ddd3c5;
  --gl-warm-400: #c4b8a8;
  --gl-warm-500: #a89e94;
  --gl-warm-600: #8a8078;
  --gl-warm-700: #6b6460;
  --gl-warm-800: #4a4541;
  --gl-warm-900: #1c1916;

  /* Semantic aliases — light mode defaults */
  --gl-accent:        var(--gl-opal-400);
  --gl-bg:            var(--gl-warm-50);
  --gl-bg-deep:       var(--gl-warm-100);
  --gl-bg-surface:    rgba(255, 251, 245, 0.7);
  --gl-bg-surface-border: rgba(200, 190, 175, 0.35);
  --gl-text:          var(--gl-warm-900);
  --gl-text-secondary: var(--gl-warm-700);
  --gl-text-muted:    var(--gl-warm-500);
  --gl-border:        rgba(0, 0, 0, 0.08);
  --gl-link:          var(--gl-opal-600);
  --gl-link-hover:    var(--gl-opal-500);
  --gl-accent-glow:   rgba(86, 219, 208, 0.12);

  /* Sparkle / shimmer */
  --gl-sparkle:       var(--gl-gold-300);
  --gl-sparkle-glow:  var(--gl-gold-400);
  --gl-shimmer-1:     var(--gl-opal-400);
  --gl-shimmer-2:     var(--gl-gold-300);
  --gl-shimmer-3:     var(--gl-rose-300);

  /* Typography */
  --gl-font-sans:  'Outfit', system-ui, sans-serif;
  --gl-font-serif: 'Source Serif 4', Georgia, serif;
  --gl-font-mono:  'JetBrains Mono', 'Fira Code', monospace;

  /* Type scale */
  --gl-text-display:  3rem;
  --gl-text-headline: 2.25rem;
  --gl-text-title:    1.375rem;
  --gl-text-body-lg:  1.125rem;
  --gl-text-body:     1rem;
  --gl-text-small:    0.875rem;
  --gl-text-caption:  0.75rem;

  /* Spacing (px equivalents at 18px base) */
  --gl-space-2:  8px;
  --gl-space-3:  12px;
  --gl-space-4:  16px;
  --gl-space-6:  24px;
  --gl-space-8:  32px;
  --gl-space-12: 48px;
  --gl-space-16: 64px;
  --gl-space-24: 96px;

  /* Motion */
  --gl-motion-fast:   150ms;
  --gl-motion-normal: 250ms;
  --gl-motion-slow:   400ms;
  --gl-motion-ease:   cubic-bezier(0.2, 0, 0, 1);

  /* Layout */
  --gl-content-width: 680px;
  --gl-page-padding:  1.5rem;
}

/* ------------------------------------------------------------
   Dark Mode
   ------------------------------------------------------------ */

@media (prefers-color-scheme: dark) {
  :root {
    --gl-bg:            #1a1714;
    --gl-bg-deep:       #141210;
    --gl-bg-surface:    rgba(42, 38, 35, 0.6);
    --gl-bg-surface-border: rgba(61, 56, 53, 0.4);
    --gl-text:          #e8e0d8;
    --gl-text-secondary: #a89e94;
    --gl-text-muted:    #78706a;
    --gl-border:        rgba(255, 255, 255, 0.08);
    --gl-link:          #7ae8df;
    --gl-link-hover:    var(--gl-opal-300);
    --gl-accent-glow:   rgba(86, 219, 208, 0.15);
    --gl-sparkle:       #d4a853;
    --gl-sparkle-glow:  rgba(212, 168, 83, 0.4);
  }
}

/* ------------------------------------------------------------
   Reduced Motion
   ------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  :root {
    --gl-motion-fast:   0ms;
    --gl-motion-normal: 0ms;
    --gl-motion-slow:   0ms;
  }

  .sparkle-dot,
  .shimmer-text {
    animation: none !important;
  }
}

/* ------------------------------------------------------------
   Keyframe Animations
   ------------------------------------------------------------ */

@keyframes gl-sparkle {
  0% {
    transform: scale(0.5) translateY(0);
    opacity: 0.05;
  }
  50% {
    transform: scale(1) translateY(-8px);
    opacity: 0.35;
  }
  100% {
    transform: scale(0.5) translateY(0);
    opacity: 0.05;
  }
}

@keyframes gl-shimmer {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ------------------------------------------------------------
   Base Reset
   ------------------------------------------------------------ */

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--gl-font-serif);
  font-size: var(--gl-text-body);
  line-height: 1.72;
  color: var(--gl-text);
  background-color: var(--gl-bg);
  position: relative;
  min-height: 100vh;
}

/* Ambient radial gradient overlay — subtle warmth */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(212, 168, 83, 0.035) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 60%, rgba(86, 219, 208, 0.03) 0%, transparent 70%),
    radial-gradient(ellipse 70% 40% at 50% 90%, rgba(232, 160, 168, 0.03) 0%, transparent 70%);
}

/* SVG noise grain texture */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ------------------------------------------------------------
   Typography Base
   ------------------------------------------------------------ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--gl-font-sans);
  font-weight: 600;
  line-height: 1.2;
  margin-top: 0;
  color: var(--gl-text);
}

h1 { font-size: var(--gl-text-display); }
h2 { font-size: var(--gl-text-headline); }
h3 { font-size: var(--gl-text-title); }
h4 { font-size: var(--gl-text-body-lg); }
h5 { font-size: var(--gl-text-body); }
h6 { font-size: var(--gl-text-small); }

p {
  margin-top: 0;
  margin-bottom: var(--gl-space-6);
}

a {
  color: var(--gl-link);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition:
    color var(--gl-motion-fast) var(--gl-motion-ease),
    text-decoration-color var(--gl-motion-fast) var(--gl-motion-ease);
}

a:hover {
  color: var(--gl-link-hover);
  text-decoration-color: currentColor;
}

code,
pre,
kbd,
samp {
  font-family: var(--gl-font-mono);
  font-size: 0.875em;
}

pre {
  background: var(--gl-bg-surface);
  border: 1px solid var(--gl-border);
  border-radius: 6px;
  padding: var(--gl-space-4) var(--gl-space-6);
  overflow-x: auto;
}

img,
video {
  max-width: 100%;
  height: auto;
}

/* ------------------------------------------------------------
   Sparkle Particles
   ------------------------------------------------------------ */

.sparkles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.sparkle-dot {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background-color: var(--gl-sparkle);
  box-shadow:
    0 0 4px 1px var(--gl-sparkle-glow),
    0 0 8px 2px var(--gl-sparkle-glow);
  animation: gl-sparkle 10s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

/* ------------------------------------------------------------
   Shimmer Text
   ------------------------------------------------------------ */

.shimmer-text {
  background: linear-gradient(
    90deg,
    var(--gl-shimmer-1),
    var(--gl-shimmer-2),
    var(--gl-shimmer-3),
    var(--gl-shimmer-1)
  );
  background-size: 300% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: gl-shimmer 8s ease-in-out infinite;
}

/* ------------------------------------------------------------
   Label
   ------------------------------------------------------------ */

.label {
  font-family: var(--gl-font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gl-text-muted);
}

/* ------------------------------------------------------------
   Content Container
   ------------------------------------------------------------ */

.content {
  position: relative;
  z-index: 1;
  max-width: var(--gl-content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gl-page-padding);
  padding-right: var(--gl-page-padding);
  padding-top: var(--gl-space-12);
  padding-bottom: var(--gl-space-12);
}

/* ------------------------------------------------------------
   Callout
   ------------------------------------------------------------ */

.callout {
  position: relative;
  background: var(--gl-bg-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--gl-bg-surface-border);
  border-left: 3px solid var(--gl-accent);
  border-radius: 6px;
  padding: var(--gl-space-4) var(--gl-space-6);
  margin-bottom: var(--gl-space-6);
}

/* ------------------------------------------------------------
   Thread Cards
   ------------------------------------------------------------ */

.thread-card {
  display: block;
  background: var(--gl-bg-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--gl-border);
  border-radius: 8px;
  padding: var(--gl-space-6) var(--gl-space-8);
  margin-bottom: var(--gl-space-4);
  text-decoration: none;
  color: inherit;
  transition:
    border-color var(--gl-motion-normal) var(--gl-motion-ease),
    box-shadow var(--gl-motion-normal) var(--gl-motion-ease);
}

.thread-card:hover {
  color: inherit;
  text-decoration-color: transparent;
  border-color: var(--gl-accent);
  box-shadow:
    0 0 0 1px var(--gl-accent),
    0 4px 24px var(--gl-accent-glow);
}

.thread-card h3 {
  font-size: var(--gl-text-title);
  font-weight: 500;
  margin-bottom: var(--gl-space-2);
}

.thread-card p {
  color: var(--gl-text-secondary);
  margin-bottom: 0;
  font-size: var(--gl-text-small);
}

/* ------------------------------------------------------------
   Reading Styles
   ------------------------------------------------------------ */

.reading h1 {
  font-size: var(--gl-text-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--gl-space-4);
}

.reading .subtitle {
  font-family: var(--gl-font-serif);
  font-style: italic;
  font-size: var(--gl-text-body-lg);
  color: var(--gl-text-secondary);
  padding-bottom: var(--gl-space-6);
  border-bottom: 1px solid var(--gl-border);
  margin-bottom: var(--gl-space-8);
}

.reading h2 {
  font-size: var(--gl-text-headline);
  font-weight: 600;
  margin-top: var(--gl-space-16);
  margin-bottom: var(--gl-space-6);
}

.reading h3 {
  font-size: var(--gl-text-title);
  font-weight: 500;
  margin-top: var(--gl-space-12);
  margin-bottom: var(--gl-space-4);
}

.reading p {
  margin-bottom: var(--gl-space-6);
}

.reading ul,
.reading ol {
  margin-bottom: var(--gl-space-6);
  padding-left: 1.5em;
}

.reading li {
  margin-bottom: var(--gl-space-2);
}

.reading blockquote {
  border-left: 3px solid var(--gl-accent);
  margin-left: 0;
  margin-right: 0;
  padding-left: var(--gl-space-6);
  font-style: italic;
  color: var(--gl-text-secondary);
}

/* ------------------------------------------------------------
   Table of Contents
   ------------------------------------------------------------ */

.toc {
  background: var(--gl-bg-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--gl-bg-surface-border);
  border-radius: 8px;
  padding: var(--gl-space-6) var(--gl-space-8);
  margin-bottom: var(--gl-space-8);
}

.toc ol {
  counter-reset: toc-counter;
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.toc li {
  counter-increment: toc-counter;
  margin-bottom: var(--gl-space-2);
}

.toc li::before {
  content: counter(toc-counter, decimal-leading-zero) ". ";
  font-family: var(--gl-font-mono);
  font-size: var(--gl-text-caption);
  color: var(--gl-text-muted);
  margin-right: var(--gl-space-2);
}

.toc a {
  font-size: var(--gl-text-small);
  color: var(--gl-link);
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */

.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  font-size: var(--gl-text-caption);
  color: var(--gl-text-muted);
  padding: var(--gl-space-8) var(--gl-page-padding);
}

.site-footer a {
  color: var(--gl-text-muted);
}

.site-footer a:hover {
  color: var(--gl-link);
}

/* ------------------------------------------------------------
   Responsive — small screens
   ------------------------------------------------------------ */

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  :root {
    --gl-text-display:  2.25rem;
    --gl-text-headline: 1.75rem;
    --gl-page-padding:  1rem;
  }

  .content {
    padding-top: var(--gl-space-8);
    padding-bottom: var(--gl-space-8);
  }

  .thread-card {
    padding: var(--gl-space-4) var(--gl-space-6);
  }
}