/* SleepMedic Blog - Deep Space Dreams + Duolingo */

:root {
  /* Deep Space Colors */
  --space-bg: #0a0e1a;  /* Deep space black */
  --space-card: #1a1f35;  /* Floating card blue */
  --space-lighter: #252b45;  /* Hover state */

  /* Cosmic Accent Colors - Vibrant but soothing */
  --purple-glow: #a78bfa;  /* Bright purple */
  --blue-glow: #60a5fa;  /* Bright blue */
  --green-glow: #34d399;  /* Bright emerald */
  --pink-glow: #f472b6;  /* Bright pink */
  --cyan-glow: #22d3ee;  /* Bright cyan */

  /* Text */
  --text-bright: #ffffff;
  --text-main: #e8ecf1;
  --text-muted: #94a3b8;

  /* UI */
  --border: rgba(167, 139, 250, 0.2);
  --shadow: rgba(0, 0, 0, 0.4);

  /* Duolingo-style Rounded */
  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --radius-xl: 40px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Nunito', sans-serif;
  background: var(--space-bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* MEGA VIBRANT Space Nebulas - floating and pulsing */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    /* SUPER vibrant nebula clouds - much brighter */
    radial-gradient(ellipse 1200px 900px at 10% 15%, rgba(167, 139, 250, 0.25) 0%, transparent 60%),
    radial-gradient(ellipse 1000px 1000px at 90% 85%, rgba(96, 165, 250, 0.2) 0%, transparent 60%),
    radial-gradient(ellipse 900px 700px at 50% 50%, rgba(52, 211, 153, 0.15) 0%, transparent 55%),
    radial-gradient(ellipse 800px 800px at 75% 25%, rgba(244, 114, 182, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse 700px 600px at 30% 70%, rgba(34, 211, 238, 0.12) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: nebula-float 30s ease-in-out infinite, nebula-pulse 15s ease-in-out infinite;
}

@keyframes nebula-float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(40px, -30px) scale(1.08);
  }
  66% {
    transform: translate(-30px, 40px) scale(0.92);
  }
}

@keyframes nebula-pulse {
  0%, 100% {
    opacity: 0.8;
    filter: brightness(1);
  }
  50% {
    opacity: 1;
    filter: brightness(1.3);
  }
}

/* LOTS of twinkling stars */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    /* Bright stars scattered everywhere */
    radial-gradient(circle 2px at 8% 12%, rgba(167, 139, 250, 0.9), transparent 2px),
    radial-gradient(circle 1px at 8% 12%, white, transparent 1px),

    radial-gradient(circle 2px at 15% 25%, rgba(96, 165, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 15% 25%, white, transparent 1px),

    radial-gradient(circle 1.5px at 22% 8%, rgba(52, 211, 153, 0.8), transparent 1.5px),
    radial-gradient(circle 1px at 22% 8%, white, transparent 1px),

    radial-gradient(circle 2px at 35% 18%, rgba(244, 114, 182, 0.7), transparent 2px),
    radial-gradient(circle 1px at 35% 18%, white, transparent 1px),

    radial-gradient(circle 1.5px at 42% 32%, rgba(167, 139, 250, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 42% 32%, white, transparent 1px),

    radial-gradient(circle 2px at 55% 15%, rgba(96, 165, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 55% 15%, white, transparent 1px),

    radial-gradient(circle 1.5px at 62% 28%, rgba(34, 211, 238, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 62% 28%, white, transparent 1px),

    radial-gradient(circle 2px at 70% 10%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 70% 10%, white, transparent 1px),

    radial-gradient(circle 1.5px at 78% 22%, rgba(52, 211, 153, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 78% 22%, white, transparent 1px),

    radial-gradient(circle 2px at 85% 35%, rgba(96, 165, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 85% 35%, white, transparent 1px),

    radial-gradient(circle 1.5px at 92% 18%, rgba(244, 114, 182, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 92% 18%, white, transparent 1px),

    radial-gradient(circle 2px at 12% 45%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 12% 45%, white, transparent 1px),

    radial-gradient(circle 1.5px at 25% 52%, rgba(96, 165, 250, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 25% 52%, white, transparent 1px),

    radial-gradient(circle 2px at 38% 48%, rgba(52, 211, 153, 0.8), transparent 2px),
    radial-gradient(circle 1px at 38% 48%, white, transparent 1px),

    radial-gradient(circle 1.5px at 48% 55%, rgba(34, 211, 238, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 48% 55%, white, transparent 1px),

    radial-gradient(circle 2px at 58% 42%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 58% 42%, white, transparent 1px),

    radial-gradient(circle 1.5px at 68% 58%, rgba(244, 114, 182, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 68% 58%, white, transparent 1px),

    radial-gradient(circle 2px at 75% 48%, rgba(96, 165, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 75% 48%, white, transparent 1px),

    radial-gradient(circle 1.5px at 88% 52%, rgba(52, 211, 153, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 88% 52%, white, transparent 1px),

    radial-gradient(circle 2px at 18% 68%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 18% 68%, white, transparent 1px),

    radial-gradient(circle 1.5px at 28% 72%, rgba(96, 165, 250, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 28% 72%, white, transparent 1px),

    radial-gradient(circle 2px at 42% 75%, rgba(52, 211, 153, 0.8), transparent 2px),
    radial-gradient(circle 1px at 42% 75%, white, transparent 1px),

    radial-gradient(circle 1.5px at 52% 65%, rgba(244, 114, 182, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 52% 65%, white, transparent 1px),

    radial-gradient(circle 2px at 65% 78%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 65% 78%, white, transparent 1px),

    radial-gradient(circle 1.5px at 72% 85%, rgba(96, 165, 250, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 72% 85%, white, transparent 1px),

    radial-gradient(circle 2px at 82% 72%, rgba(34, 211, 238, 0.8), transparent 2px),
    radial-gradient(circle 1px at 82% 72%, white, transparent 1px),

    radial-gradient(circle 1.5px at 92% 88%, rgba(52, 211, 153, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 92% 88%, white, transparent 1px),

    radial-gradient(circle 2px at 5% 90%, rgba(167, 139, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 5% 90%, white, transparent 1px),

    radial-gradient(circle 1.5px at 32% 92%, rgba(244, 114, 182, 0.7), transparent 1.5px),
    radial-gradient(circle 1px at 32% 92%, white, transparent 1px),

    radial-gradient(circle 2px at 50% 88%, rgba(96, 165, 250, 0.8), transparent 2px),
    radial-gradient(circle 1px at 50% 88%, white, transparent 1px);

  animation: starfield-twinkle 8s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes starfield-twinkle {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography - Friendly & Readable */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-bright);
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.75rem);
}

a {
  color: var(--blue-glow);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--purple-glow);
}

/* Header - Welcoming & Friendly */
header {
  padding: 80px 0 60px;
  text-align: center;
}

header h1 {
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--blue-glow), var(--purple-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: cosmic-glow 4s ease-in-out infinite;
}

@keyframes cosmic-glow {
  0%, 100% {
    filter: drop-shadow(0 0 20px rgba(167, 139, 250, 0.3));
  }
  50% {
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.4));
  }
}

header p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

header a {
  display: inline-block;
  padding: 12px 28px;
  background: rgba(167, 139, 250, 0.15);
  border: 2px solid rgba(167, 139, 250, 0.3);
  border-radius: var(--radius-xl);
  color: var(--purple-glow);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

header a:hover {
  background: rgba(167, 139, 250, 0.25);
  border-color: var(--purple-glow);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(167, 139, 250, 0.3);
}

/* Category Filter - Duolingo Style Pills */
.filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 40px 0 60px;
  padding: 0 24px;
}

.filter button {
  padding: 10px 24px;
  background: rgba(26, 31, 53, 0.8);
  border: 2px solid transparent;
  border-radius: var(--radius-xl);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.filter button:hover {
  background: rgba(167, 139, 250, 0.2);
  color: var(--text-bright);
  transform: translateY(-2px);
}

.filter button.active {
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.3), rgba(96, 165, 250, 0.25));
  border-color: var(--purple-glow);
  color: var(--text-bright);
  box-shadow: 0 4px 15px rgba(167, 139, 250, 0.3);
}

/* Posts Grid */
.posts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 28px;
  padding: 0 24px 80px;
}

@media (max-width: 768px) {
  .posts {
    grid-template-columns: 1fr;
  }
}

/* Post Card - Duolingo-Rounded & Gentle */
.post {
  background: var(--space-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  backdrop-filter: blur(10px);
}

.post::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, var(--purple-glow), var(--blue-glow), var(--green-glow));
  border-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.post:hover::before {
  opacity: 0.4;
}

.post:hover {
  background: var(--space-lighter);
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 32px var(--shadow);
}

.post .tag {
  display: inline-block;
  padding: 6px 14px;
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.25), rgba(96, 165, 250, 0.2));
  border: 1.5px solid rgba(167, 139, 250, 0.35);
  border-radius: var(--radius-xl);
  color: var(--purple-glow);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 14px;
}

.post h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  font-weight: 700;
  line-height: 1.4;
}

.post h2 a {
  color: var(--text-bright);
  transition: all 0.3s ease;
}

.post h2 a:hover {
  background: linear-gradient(135deg, var(--blue-glow), var(--purple-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.post .excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.post .meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.825rem;
  color: rgba(160, 168, 192, 0.7);
}

/* Individual Post Page */
.post-header {
  padding: 80px 0 40px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.post-header h1 {
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--blue-glow), var(--purple-glow), var(--green-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.post-header .meta {
  display: flex;
  justify-content: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.post-content h2 {
  margin-top: 48px;
  margin-bottom: 20px;
  font-size: 1.875rem;
  color: var(--text-bright);
}

.post-content h3 {
  margin-top: 40px;
  margin-bottom: 16px;
  font-size: 1.5rem;
  color: var(--text-bright);
}

.post-content p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.post-content a {
  color: var(--blue-glow);
  text-decoration: underline;
  text-decoration-color: rgba(96, 165, 250, 0.3);
  text-underline-offset: 3px;
  transition: all 0.3s ease;
}

.post-content a:hover {
  color: var(--purple-glow);
  text-decoration-color: var(--purple-glow);
}

.post-content ul, .post-content ol {
  margin-bottom: 20px;
  padding-left: 28px;
  color: var(--text-muted);
}

.post-content li {
  margin-bottom: 10px;
}

.post-content blockquote {
  border-left: 4px solid var(--purple-glow);
  padding: 20px 24px;
  margin: 28px 0;
  background: rgba(167, 139, 250, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-style: italic;
}

.post-content code {
  background: rgba(167, 139, 250, 0.18);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.9em;
  color: var(--purple-glow);
  font-family: 'SF Mono', Monaco, monospace;
}

.post-content pre {
  background: var(--space-card);
  padding: 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 20px;
  border: 2px solid var(--border);
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text-main);
}

/* Footer - Gentle */
footer {
  text-align: center;
  padding: 48px 24px 40px;
  color: rgba(160, 168, 192, 0.6);
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

footer p {
  font-size: 0.875rem;
}

/* Scrollbar - Gentle Colors */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--space-bg);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--purple-glow), var(--blue-glow));
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--blue-glow), var(--cyan-glow));
}

/* Utility */
.text-center { text-align: center; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }