/* ==========================================================================
   AETHERIA SERENE DESIGN SYSTEM FOR SRICHANDAN TECH JOURNAL
   - 4 Switchable Nature-Inspired Pastel Palettes (Sage, Coastal, Lavender, Terracotta)
   - Airy Daylight & Cozy Twilight (Dark Slate) Modes
   - Frosted Glassmorphism, Shimmer Gradient Text, 3D Tilt Cards, & Editorial Typography
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Default Palette: Serene Sage & Matcha (Airy Daylight) */
  --bg-main: #FAF8F5;
  --bg-secondary: #F2EFE9;
  --bg-card: rgba(255, 255, 255, 0.78);
  --bg-subcard: rgba(244, 241, 234, 0.78);
  --border-card: rgba(107, 144, 128, 0.20);
  --text-main: #2C3531;
  --text-muted: #64726B;
  --accent-primary: #6B9080;
  --accent-secondary: #A4C3B2;
  --accent-tertiary: #E09F7D;
  --accent-soft: #EAF4F4;
  --accent-glow: rgba(107, 144, 128, 0.22);
  --orb-1: rgba(164, 195, 178, 0.42);
  --orb-2: rgba(224, 159, 125, 0.26);
  --orb-3: rgba(204, 227, 222, 0.48);
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
  --shadow-soft: 0 20px 50px -15px rgba(44, 53, 49, 0.07);
  --glass-blur: 20px;
}

/* Preset 2: Coastal Breeze */
[data-aetheria-theme="coastal"] {
  --bg-main: #F6F9FC;
  --bg-secondary: #EDF3F8;
  --bg-card: rgba(255, 255, 255, 0.80);
  --bg-subcard: rgba(237, 244, 250, 0.78);
  --border-card: rgba(91, 143, 185, 0.18);
  --text-main: #233342;
  --text-muted: #627688;
  --accent-primary: #5B8FB9;
  --accent-secondary: #8ECAE6;
  --accent-tertiary: #E2A383;
  --accent-soft: #EBF4FA;
  --accent-glow: rgba(91, 143, 185, 0.22);
  --orb-1: rgba(142, 202, 230, 0.38);
  --orb-2: rgba(182, 226, 211, 0.32);
  --orb-3: rgba(235, 216, 200, 0.38);
}

/* Preset 3: Lavender Mist */
[data-aetheria-theme="lavender"] {
  --bg-main: #FAF8FC;
  --bg-secondary: #F3EFF8;
  --bg-card: rgba(255, 255, 255, 0.80);
  --bg-subcard: rgba(243, 239, 250, 0.78);
  --border-card: rgba(139, 126, 179, 0.18);
  --text-main: #302A40;
  --text-muted: #6E6582;
  --accent-primary: #8B7EB3;
  --accent-secondary: #C3B5E0;
  --accent-tertiary: #E5A4B4;
  --accent-soft: #F3EFFA;
  --accent-glow: rgba(139, 126, 179, 0.22);
  --orb-1: rgba(195, 181, 224, 0.40);
  --orb-2: rgba(229, 164, 180, 0.30);
  --orb-3: rgba(214, 226, 245, 0.42);
}

/* Preset 4: Warm Terracotta & Peach */
[data-aetheria-theme="terracotta"] {
  --bg-main: #FDF9F6;
  --bg-secondary: #F7EFEA;
  --bg-card: rgba(255, 255, 255, 0.80);
  --bg-subcard: rgba(249, 239, 232, 0.78);
  --border-card: rgba(209, 123, 102, 0.20);
  --text-main: #3D2E2A;
  --text-muted: #7C6761;
  --accent-primary: #D17B66;
  --accent-secondary: #F2B8A2;
  --accent-tertiary: #84A59D;
  --accent-soft: #FBF0EC;
  --accent-glow: rgba(209, 123, 102, 0.22);
  --orb-1: rgba(242, 184, 162, 0.42);
  --orb-2: rgba(246, 214, 173, 0.35);
  --orb-3: rgba(132, 165, 157, 0.28);
}

/* Cozy Twilight Mode (Synced with MkDocs Slate Dark Mode) */
[data-md-color-scheme="slate"],
html.twilight-mode {
  --bg-main: #1E222A;
  --bg-secondary: #252A34;
  --bg-card: rgba(38, 43, 54, 0.80);
  --bg-subcard: rgba(29, 33, 42, 0.75);
  --border-card: rgba(255, 255, 255, 0.10);
  --text-main: #F0ECE1;
  --text-muted: #A6B0C0;
  --accent-soft: rgba(255, 255, 255, 0.07);
  --shadow-soft: 0 20px 50px -15px rgba(10, 12, 16, 0.45);
  --orb-1: rgba(107, 144, 128, 0.22);
  --orb-2: rgba(139, 126, 179, 0.18);
  --orb-3: rgba(91, 143, 185, 0.20);
}

/* ==========================================================================
   MKDOCS MATERIAL OVERRIDES (Seamless Global Integration)
   ========================================================================== */
[data-md-color-scheme="default"],
[data-md-color-scheme="slate"] {
  --md-default-bg-color: var(--bg-main);
  --md-default-fg-color: var(--text-main);
  --md-default-fg-color--light: var(--text-muted);
  --md-primary-fg-color: var(--accent-primary);
  --md-primary-fg-color--light: var(--accent-secondary);
  --md-primary-fg-color--dark: var(--accent-primary);
  --md-accent-fg-color: var(--accent-tertiary);
  --md-typeset-color: var(--text-main);
  --md-typeset-a-color: var(--accent-primary);
}

body {
  background-color: var(--bg-main) !important;
  color: var(--text-main) !important;
  font-family: var(--font-main) !important;
  transition: background-color 0.45s ease, color 0.35s ease;
  overflow-x: hidden;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.font-display {
  font-family: var(--font-heading) !important;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.md-typeset h1 {
  font-weight: 700;
}

.md-typeset h2 {
  font-weight: 700;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 0.4rem;
}

/* Ambient Watercolor Canvas Behind Content */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

.md-container,
.md-main,
.md-footer {
  position: relative;
  z-index: 1;
}

/* Floating Glass Header & Navigation Tabs */
.md-header {
  background: var(--bg-card) !important;
  color: var(--text-main) !important;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-card);
  box-shadow: var(--shadow-soft) !important;
}

.md-header__title,
.md-header__button,
.md-tabs__link {
  color: var(--text-main) !important;
  font-family: var(--font-heading);
}

.md-header__button.md-logo {
  padding: 0.2rem;
  margin-right: 0.15rem;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 2.1rem;
  width: 2.1rem;
  transition: transform 0.3s ease;
}

.md-header__button.md-logo:hover img,
.md-header__button.md-logo:hover svg {
  transform: scale(1.08) rotate(-4deg);
}

.md-tabs {
  background: var(--bg-subcard) !important;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-card);
  display: block !important;
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
}

.md-tabs[hidden] {
  display: block !important;
  pointer-events: auto !important;
}

.md-tabs__link,
.md-tabs[hidden] .md-tabs__link {
  opacity: 0.85 !important;
  transform: none !important;
  font-weight: 600;
  font-size: 0.82rem;
  transition: color 0.2s ease, opacity 0.2s ease !important;
  pointer-events: auto !important;
}

.md-tabs__item--active .md-tabs__link,
.md-tabs__link--active,
.md-tabs__link:hover,
.md-tabs[hidden] .md-tabs__item--active .md-tabs__link,
.md-tabs[hidden] .md-tabs__link:hover {
  opacity: 1 !important;
  color: var(--accent-primary) !important;
}

.md-tabs__item--active {
  border-bottom: 2px solid var(--accent-primary);
}

/* Search Bar in Header */
.md-search__form {
  background-color: var(--bg-subcard) !important;
  border: 1px solid var(--border-card);
  border-radius: 999px !important;
}
.md-search__input,
.md-search__input::placeholder,
.md-search__icon {
  color: var(--text-muted) !important;
}

/* Header Palette Dots Bar */
.aetheria-header-palettes {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.65rem;
  margin-right: 0.5rem;
  background: var(--bg-subcard);
  border: 1px solid var(--border-card);
  border-radius: 999px;
}

.aetheria-dot {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.85);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.12);
}

.aetheria-dot:hover,
.aetheria-dot.active {
  transform: scale(1.25);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

/* ==========================================================================
   CORE AETHERIA GLASSMORPHISM & SHIMMER COMPONENTS
   ========================================================================== */
@keyframes shimmerSoft {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.92); }
}

.pastel-gradient-text {
  background: linear-gradient(120deg, var(--accent-primary) 0%, var(--accent-tertiary) 55%, var(--accent-primary) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmerSoft 7s ease-in-out infinite;
}

.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-soft);
  border-radius: 24px;
  transition: background-color 0.4s ease, border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel-interactive:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 24px 48px -12px var(--accent-glow);
  transform: translateY(-4px);
}

.btn-primary-soft {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #FFFFFF !important;
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 0.85rem 1.75rem;
  border-radius: 16px;
  text-decoration: none !important;
  box-shadow: 0 10px 25px -6px var(--accent-glow);
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary-soft:hover {
  filter: brightness(1.05);
  box-shadow: 0 14px 30px -5px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-glass-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: var(--bg-card);
  color: var(--text-main) !important;
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 0.85rem 1.65rem;
  border-radius: 16px;
  border: 1px solid var(--border-card);
  text-decoration: none !important;
  box-shadow: var(--shadow-soft);
  transition: all 0.3s ease;
}

.btn-glass-secondary:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   HOMEPAGE HERO, 3D TILT CARD, BENTO GRID & SHOWCASE CARDS
   ========================================================================== */
.aetheria-hero-centered {
  padding: 2rem 0 2.5rem;
  max-width: 52rem;
}

.aetheria-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.2rem;
}

.aetheria-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent-primary);
  animation: pulseDot 2s infinite;
}

.aetheria-hero-title {
  font-family: var(--font-heading) !important;
  font-size: clamp(2.3rem, 4.2vw, 3.8rem) !important;
  line-height: 1.12 !important;
  font-weight: 700 !important;
  margin: 0 0 1.2rem 0 !important;
  color: var(--text-main) !important;
}

.aetheria-hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 38rem;
  margin-bottom: 1.75rem;
}

.aetheria-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

/* Palette Switcher Pills Row */
.aetheria-palette-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding-top: 0.5rem;
}

.aetheria-palette-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.9rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
  background: var(--bg-subcard);
  border: 1px solid var(--border-card);
  cursor: pointer;
  transition: all 0.25s ease;
}

.aetheria-palette-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}

.aetheria-palette-swatch {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  display: inline-block;
}

/* Right Hero 3D Sanctuary Card */
.aetheria-sanctuary-card {
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.25s cubic-bezier(0.2, 0, 0.38, 0.9);
}

.aetheria-card-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-card);
}

.aetheria-window-dots {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.aetheria-window-dots span.dot {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  display: inline-block;
}

.aetheria-status-pill {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-primary);
  letter-spacing: 0.05em;
}

.aetheria-orb-core {
  padding: 2rem 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.aetheria-rings-wrap {
  position: relative;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.aetheria-ring-outer {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1.5px dashed var(--accent-primary);
  opacity: 0.4;
  animation: spinSlow 28s linear infinite;
}

.aetheria-ring-inner {
  position: absolute;
  inset: 14px;
  border-radius: 999px;
  border: 1.5px solid var(--accent-secondary);
  opacity: 0.55;
}

.aetheria-center-emblem {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: 0 12px 28px -6px var(--accent-glow);
  transition: transform 0.4s ease;
}

.aetheria-sanctuary-card:hover .aetheria-center-emblem {
  transform: scale(1.08) rotate(6deg);
}

.aetheria-telemetry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-card);
}

.aetheria-telemetry-box {
  background: var(--bg-subcard);
  padding: 0.75rem 0.9rem;
  border-radius: 16px;
}

.aetheria-telemetry-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.aetheria-telemetry-val {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-main);
}

/* Curated Works / Guide Showcase Cards */
.aetheria-section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin: 2.5rem 0 1.5rem;
}

.aetheria-filter-tabs {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
}

.aetheria-filter-btn {
  padding: 0.45rem 0.95rem;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.aetheria-filter-btn.active,
.aetheria-filter-btn:hover {
  background: var(--bg-subcard);
  color: var(--text-main);
}

.aetheria-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.aetheria-guide-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  text-decoration: none !important;
  color: var(--text-main) !important;
}

.aetheria-guide-banner {
  height: 150px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.aetheria-guide-banner.sage {
  background: linear-gradient(135deg, #DCE8E2 0%, #EAF2EE 50%, #F5EBE1 100%);
}
.aetheria-guide-banner.lavender {
  background: linear-gradient(135deg, #E6E1F2 0%, #F2EEF9 50%, #F9E6EC 100%);
}
.aetheria-guide-banner.terracotta {
  background: linear-gradient(135deg, #F7E3DA 0%, #FBF0EA 50%, #E3EFEA 100%);
}
.aetheria-guide-banner.coastal {
  background: linear-gradient(135deg, #DAEBF7 0%, #EAF4FB 50%, #E3EFEA 100%);
}

.aetheria-guide-icon {
  width: 68px;
  height: 68px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.4s ease;
}

.aetheria-guide-card:hover .aetheria-guide-icon {
  transform: scale(1.12) rotate(5deg);
}

.aetheria-guide-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.86);
  color: #2C3531;
}

.aetheria-guide-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
}

.aetheria-guide-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0 !important;
  color: var(--text-main);
}

.aetheria-guide-desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 1.1rem 0;
}

.aetheria-guide-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-card);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.aetheria-guide-cta {
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: transform 0.25s ease;
}

.aetheria-guide-card:hover .aetheria-guide-cta {
  transform: translateX(4px);
}

/* Bento Philosophy Grid */
.aetheria-bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0 2.5rem;
}

.aetheria-bento-card {
  padding: 1.6rem;
}

.aetheria-bento-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

/* ==========================================================================
   ARTICLE STYLING (Tables, Callouts, Diagrams, Code Blocks)
   ========================================================================== */
.md-typeset .admonition,
.md-typeset details {
  background-color: var(--bg-card) !important;
  border: 1px solid var(--border-card) !important;
  border-left: 4px solid var(--accent-primary) !important;
  border-radius: 16px !important;
  box-shadow: var(--shadow-soft) !important;
  backdrop-filter: blur(var(--glass-blur));
}

.md-typeset table:not([class]) {
  background-color: var(--bg-card) !important;
  border: 1px solid var(--border-card) !important;
  border-radius: 16px !important;
  overflow: hidden;
  box-shadow: var(--shadow-soft) !important;
}

.md-typeset table:not([class]) th {
  background-color: var(--bg-subcard) !important;
  color: var(--text-main) !important;
  font-family: var(--font-heading);
  font-weight: 700;
}

.md-typeset img[src$=".svg"] {
  border-radius: 18px;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-soft);
  margin: 1rem auto;
  display: block;
}

/* Toast Notification */
#aetheria-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  border-radius: 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

#aetheria-toast.visible {
  transform: translateY(0);
  opacity: 1;
}