@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;800;900&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ==========================================
   THEME DEFINITIONS
   ========================================== */
:root {
  /* Font Family Tokens */
  --font-title: 'Cinzel', Georgia, serif;
  --font-body: 'Crimson Pro', 'Crimson Text', serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Theme 1: Dark Library (Default) */
  --bg: #0c0813;
  --bg-panel: #161122;
  --bg-panel-hover: #1e172e;
  --text: #eae4d9;
  --text-muted: #a395b0;
  --accent: #dfb15b;
  --accent-rgb: 223, 177, 91;
  --accent-hover: #f0c97f;
  --border: #2d243b;
  --shadow: rgba(0, 0, 0, 0.5);
  --header-grad: radial-gradient(120% 100% at 50% -10%, #241640 0%, #0c0813 65%);
  --button-text: #0c0813;
  --card-border-glow: rgba(223, 177, 91, 0.1);
  --interactive-glow: 0 0 15px rgba(223, 177, 91, 0.35);
}

[data-theme="parchment"] {
  /* Theme 2: Academic Parchment (Light) */
  --bg: #f5eedc;
  --bg-panel: #fcf9f2;
  --bg-panel-hover: #ffffff;
  --text: #221f1a;
  --text-muted: #6e6557;
  --accent: #8b263e;
  --accent-rgb: 139, 38, 62;
  --accent-hover: #ab334f;
  --border: #dfd6c2;
  --shadow: rgba(139, 38, 62, 0.08);
  --header-grad: radial-gradient(120% 100% at 50% -10%, #e6dac3 0%, #f5eedc 75%);
  --button-text: #ffffff;
  --card-border-glow: rgba(139, 38, 62, 0.05);
  --interactive-glow: 0 0 12px rgba(139, 38, 62, 0.25);
}

[data-theme="slate"] {
  /* Theme 3: Oxford Slate (Cool Neutral) */
  --bg: #141a24;
  --bg-panel: #1b2533;
  --bg-panel-hover: #233144;
  --text: #e8ecf2;
  --text-muted: #889bb0;
  --accent: #2bbbb0;
  --accent-rgb: 43, 187, 176;
  --accent-hover: #4ad4c9;
  --border: #28374a;
  --shadow: rgba(0, 0, 0, 0.4);
  --header-grad: radial-gradient(120% 100% at 50% -10%, #1c364e 0%, #141a24 65%);
  --button-text: #141a24;
  --card-border-glow: rgba(43, 187, 176, 0.1);
  --interactive-glow: 0 0 15px rgba(43, 187, 176, 0.35);
}

[data-theme="royal"] {
  /* Theme 4: Royal Amethyst (Rich Gold-Navy) */
  --bg: #090b1c;
  --bg-panel: #111530;
  --bg-panel-hover: #191f45;
  --text: #eaeefc;
  --text-muted: #838eb5;
  --accent: #dca337;
  --accent-rgb: 220, 163, 55;
  --accent-hover: #f0bd5a;
  --border: #232a54;
  --shadow: rgba(0, 0, 0, 0.6);
  --header-grad: radial-gradient(120% 100% at 50% -10%, #191c3d 0%, #090b1c 65%);
  --button-text: #090b1c;
  --card-border-glow: rgba(220, 163, 55, 0.12);
  --interactive-glow: 0 0 15px rgba(220, 163, 55, 0.4);
}

/* ==========================================
   RESET & SYSTEM BASICS
   ========================================== */
html {
  scroll-behavior: smooth;
}

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

body {
  min-height: 100vh;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.15rem;
  line-height: 1.65;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

a:hover {
  color: var(--accent-hover);
  text-shadow: 0 0 4px rgba(var(--accent-rgb), 0.3);
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  color: #ffffff;
  line-height: 1.2;
  font-weight: 600;
}

[data-theme="parchment"] h1,
[data-theme="parchment"] h2,
[data-theme="parchment"] h3,
[data-theme="parchment"] h4 {
  color: var(--text);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==========================================
   AESTHETIC WIDGETS & SECTIONS
   ========================================== */

/* Theme Switcher Widget */
.theme-picker-widget {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  display: flex;
  gap: 0.5rem;
  background: var(--bg-panel);
  padding: 0.4rem;
  border-radius: 30px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 15px var(--shadow);
  z-index: 100;
}

.theme-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid transparent;
  cursor: pointer;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.theme-btn:hover {
  transform: scale(1.15);
}

.theme-btn.active {
  border-color: var(--accent);
  box-shadow: var(--interactive-glow);
}

.theme-btn[data-theme-val="library"] { background: #0c0813; border: 1.5px solid #dfb15b; }
.theme-btn[data-theme-val="parchment"] { background: #f5eedc; border: 1.5px solid #8b263e; }
.theme-btn[data-theme-val="slate"] { background: #141a24; border: 1.5px solid #2bbbb0; }
.theme-btn[data-theme-val="royal"] { background: #090b1c; border: 1.5px solid #dca337; }

/* Hero Section */
.hero {
  background: var(--header-grad);
  padding: 8rem 0 5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.hero-kicker {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  margin-bottom: 1.5rem;
  animation: fadeIn 1s ease-out;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.hero p {
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-style: italic;
  color: var(--text-muted);
  max-width: 750px;
  margin: 0 auto 2.5rem;
}

.hero-socials {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
}

.btn-primary, .btn-secondary {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.85rem 1.75rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--button-text);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--interactive-glow);
  transform: translateY(-2px);
  color: var(--button-text);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-panel);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Search and Filter Widget */
.search-widget {
  margin-top: -2.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem 1.5rem;
  box-shadow: 0 10px 30px var(--shadow);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  position: relative;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
}

.search-input-wrapper input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-input-wrapper input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.2);
}

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  fill: var(--text-muted);
  width: 16px;
  height: 16px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.5rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover, .filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-panel-hover);
}

/* Main Layout Grid */
.main-content {
  padding: 4rem 0;
}

.grid-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 992px) {
  .grid-layout {
    grid-template-columns: 8fr 4fr;
  }
}

/* Article Lists & Grid */
.section-title {
  font-size: 1.8rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.work-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
  box-shadow: 0 4px 10px var(--shadow);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  display: flex;
  flex-direction: column-reverse;
  gap: 1.2rem;
  position: relative;
  overflow: hidden;
}

@media (min-width: 600px) {
  .work-card {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
  }
}

.card-content {
  flex: 1;
}

.card-media {
  width: 90px;
  height: 90px;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .card-media {
    margin: 0;
  }
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-media.placeholder-svg {
  background: var(--bg);
  border: 1px solid var(--border);
}

.card-media.placeholder-svg svg {
  width: 36px;
  height: 36px;
  fill: var(--accent);
  opacity: 0.85;
}

.work-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px var(--shadow);
  border-color: var(--accent);
}

.work-card:hover::before {
  width: 100%;
}

.card-category {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
  display: block;
}

.work-card h3 {
  font-size: 1.4rem;
  margin-bottom: 0.85rem;
  color: #ffffff;
}

[data-theme="parchment"] .work-card h3 {
  color: var(--text);
}

.work-card p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: auto;
}

.card-source-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  color: var(--text-muted);
}

.card-action-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* Books Component Spec */
.book-card-horizontal {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 10px var(--shadow);
}

@media (min-width: 600px) {
  .book-card-horizontal {
    grid-template-columns: 140px 1fr;
  }
}

.book-cover-img {
  width: 100%;
  max-width: 140px;
  border-radius: 6px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  margin: 0 auto;
  display: block;
}

.portal-seal-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 140px;
  background: #f3edde;
  border: 1px solid #dfd6c2;
  border-radius: 8px;
  aspect-ratio: 1 / 1;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  margin: 0 auto;
}

.portal-seal {
  width: 76px;
  height: 76px;
  border: 3px solid #16203a;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: 'Cinzel', 'Playfair Display', serif;
  font-style: italic;
  font-size: 1.25rem;
  font-weight: 700;
  color: #16203a;
  background: #faf6ea;
  letter-spacing: -0.02em;
}

.book-details {
  display: flex;
  flex-direction: column;
}

.book-details h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.book-details .author-tag {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.book-details p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.book-links-shelf {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: auto;
}

.book-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.6rem 1rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  text-transform: uppercase;
  transition: all 0.25s ease;
}

.book-btn:hover {
  background: var(--accent);
  color: var(--button-text);
  border-color: var(--accent);
  box-shadow: var(--interactive-glow);
}

/* Alchemy Volume Grid Widget */
.volume-shelf {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.volume-item {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, border-color 0.25s;
}

.volume-item:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.volume-header {
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  text-align: center;
  padding: 0.5rem;
}

.volume-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.volume-number {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.65rem;
  margin-bottom: 0.25rem;
  display: block;
}

.volume-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.volume-listen {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* Sidebar Widgets */
.sidebar-widgets {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 4px 10px var(--shadow);
}

.sidebar-widget-title {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Podcast & Youtube widgets */
.podcast-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.podcast-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.podcast-item:hover {
  background: var(--bg-panel-hover);
  border-color: var(--border);
}

.podcast-thumbnail {
  width: 50px;
  height: 50px;
  border-radius: 4px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.podcast-details {
  flex: 1;
  min-width: 0;
}

.podcast-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.15rem;
}

.podcast-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.podcast-play-icon {
  fill: var(--accent);
  width: 20px;
  height: 20px;
  opacity: 0.8;
  transition: transform 0.2s, opacity 0.2s;
}

.podcast-item:hover .podcast-play-icon {
  transform: scale(1.15);
  opacity: 1;
}

/* Blog Stats Widget */
.blog-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.stat-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  text-align: center;
}

.stat-num {
  font-family: var(--font-title);
  color: var(--accent);
  font-size: 1.8rem;
  font-weight: 800;
  display: block;
}

.stat-lbl {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0;
  background: var(--bg-panel);
  text-align: center;
  margin-top: 4rem;
}

.footer-logo {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  color: #ffffff;
}

[data-theme="parchment"] .footer-logo {
  color: var(--text);
}

.footer-tagline {
  color: var(--text-muted);
  font-style: italic;
  font-size: 1rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}