/* --- THEME VARIABLES --- */
:root {
  /* Normal Mode / Ghost Mode (Default) */
  --bg-color: #f0efeb;
  --text-color: #3a403d;
  --text-muted: #7e8682;
  --nav-bg: rgba(240, 239, 235, 0.6);
  --nav-text: #9ba39e;
  --container-bg: rgba(255, 255, 255, 0.3);
  --border-color: rgba(255, 255, 255, 0.6);
  --accent-color: #7d9d89;
  --accent-shadow: rgba(125, 157, 137, 0.4);
  --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
  --font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --glass-blur: blur(12px);
  --border-radius: 8px;
}

html.terminal-mode {
  /* Terminal Mode */
  --bg-color: #121212;
  --text-color: #00ff00;
  --text-muted: #ccc;
  --nav-bg: #0a0a0a;
  --nav-text: #555;
  --container-bg: #1a1a1a;
  --border-color: #333;
  --accent-color: #00ff00;
  --accent-shadow: rgba(0, 255, 0, 0.15);
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
  --font-family: monospace;
  --glass-blur: none;
  --border-radius: 0px;
}

/* --- STYLES --- */
body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition:
    background-color 0.6s ease,
    color 0.6s ease;
}

.container {
  border: 1px solid var(--border-color);
  padding: 2rem 4rem;
  background-color: var(--container-bg);
  box-shadow: var(--box-shadow);
  margin-top: 100px;
  margin-bottom: 40px;
  max-width: 1200px;
  width: 80%;
  border-radius: var(--border-radius);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.6s ease;
}

.container-settings {
  display: flex;
  flex-direction: column;
  align-items: center;
}
h1 {
  margin-top: 0;
}

.navigation {
  width: 100%;
  text-align: center;
  padding: 1rem;
  background-color: var(--nav-bg);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  position: absolute;
  top: 0;
  left: 0;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.6s ease;
}

.navigation a {
  color: var(--nav-text);
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
  transition: color 0.3s ease;
}

.navigation a:hover,
.navigation a.active {
  color: var(--accent-color);
}

.intro-text {
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

/* Homepage: full-width row so side sections can hug the viewport edge */
#main-body.home-page {
  align-self: stretch;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 10px;
  align-items: start;
  width: 100%;
  margin-top: 100px;
  margin-bottom: 40px;
  box-sizing: border-box;
}

.home-main {
  min-width: 0;
  /* Keep main column content aligned like other pages (centered in free space) */
  display: flex;
  justify-content: center;
  padding-left: max(1rem, env(safe-area-inset-left));
}

.home-main > .container {
  width: 80%;
  max-width: 1200px;
  margin-top: 0;
  margin-bottom: 0;
  margin-left: auto;
  margin-right: auto;
}

.home-sections {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  padding-right: 20px;
}

.home-section {
  box-sizing: border-box;
  border: 1px solid var(--border-color);
  padding: 1.25rem 1.35rem;
  background-color: var(--container-bg);
  box-shadow: var(--box-shadow);
  border-radius: var(--border-radius);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

@media (max-width: 960px) {
  .home-layout {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .home-main {
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .home-sections {
    padding-left: max(1rem, env(safe-area-inset-left));
  }
}

.changelog {
  margin: 0;
  padding: 0;
}

.changelog-heading {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.changelog-subject {
  margin: 0 0 0.5rem 0;
  line-height: 1.45;
  color: var(--text-color);
}

.changelog-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.changelog-status,
.changelog-error {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
}

.changelog-error {
  font-style: normal;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.media-card {
  display: flex;
  flex-direction: column;
  background-color: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    background-color 0.6s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.media-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--accent-shadow);
  border-color: var(--accent-color);
}

.media-logo {
  width: 100%;
  height: 120px;
  object-fit: contain;
  object-position: center;
  border-radius: 4px;
  margin-bottom: 1rem;
  background-color: var(--bg-color);
  transition: background-color 0.6s ease;
}

.media-card h3 {
  margin: 0 0 0.5rem 0;
  color: var(--accent-color);
  transition: color 0.6s ease;
}

.media-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.4;
  transition: color 0.6s ease;
}

/* --- TOGGLE BUTTON STYLES --- */
.theme-switch {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--accent-color);
  padding: 0.5rem 1rem;
  font-family: var(--font-family);
  cursor: pointer;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

.theme-switch:hover {
  background-color: var(--accent-color);
  color: var(--bg-color);
}

/* --- PRINCIPLE FLIP CARDS --- */
.principle-card {
  background-color: transparent;
  perspective: 1000px; /* Creates the 3D space for the flip */
  min-height: 180px;
  cursor: pointer;
}

.principle-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1); /* Smooth flipping physics */
  transform-style: preserve-3d;
}

/* The class we will toggle with JavaScript */
.principle-card.flipped .principle-card-inner {
  transform: rotateY(180deg);
}

.principle-card-front,
.principle-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  box-sizing: border-box;

  background-color: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);

  /* Added opacity to the transition */
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    background-color 0.6s ease,
    opacity 0.3s ease;
}

/* --- THE BUG FIX --- */
.principle-card-front {
  transform: rotateY(0deg) translateZ(1px); /* translateZ prevents 3D flickering */
  z-index: 2;
  opacity: 1;
}

.principle-card-front:hover {
  box-shadow: 0 10px 20px var(--accent-shadow);
  border-color: var(--accent-color);
}

.principle-card-front h3 {
  margin: 0;
  color: var(--accent-color);
  transition: color 0.6s ease;
  font-size: 1.2rem;
}

.principle-card-back {
  transform: rotateY(180deg) translateZ(1px);
  z-index: 1;
  opacity: 0; /* Force it to be invisible initially */
  border-color: var(--accent-color);
  box-shadow: 0 5px 15px var(--accent-shadow);
}

.principle-card-back p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-color);
  line-height: 1.5;
  transition: color 0.6s ease;
}

/* Swap opacity and z-index when flipped so the browser doesn't render both layers */
.principle-card.flipped .principle-card-front {
  opacity: 0;
  z-index: 1;
  pointer-events: none; /* Prevents accidentally hovering the invisible front */
}

.principle-card.flipped .principle-card-back {
  opacity: 1;
  z-index: 2;
}

/* --- BLOG CARDS (Main Page) --- */
.blog-feed {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: 100%;
}

.blog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem; /* Generous padding for a "bigger" feel */
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    background-color 0.6s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--accent-shadow);
  border-color: var(--accent-color);
}

.blog-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  transition: border-color 0.6s ease;
}

.blog-card h2 {
  margin: 0;
  color: var(--accent-color);
  transition: color 0.6s ease;
  font-size: 1.5rem;
}

.blog-date {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.6s ease;
  white-space: nowrap;
  margin-left: 1rem;
}

.blog-snippet {
  line-height: 1.6;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  transition: color 0.6s ease;
}

.blog-snippet p {
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.read-more {
  align-self: flex-start;
  color: var(--text-muted);
  font-weight: bold;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 1px;
  transition: color 0.3s ease;
}

.blog-card:hover .read-more {
  color: var(--accent-color);
}

/* --- CODE EDITOR (/code/editor) --- */
.container--code-editor {
  max-width: 1280px;
  width: 92%;
}

.code-editor-back {
  margin: 0 0 1rem 0;
  font-size: 0.95rem;
}

.code-editor-back a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: bold;
}

.code-editor-back a:hover {
  text-decoration: underline;
}

.code-editor-roadmap-note {
  margin: 0 0 1.5rem 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.code-editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.code-editor-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.code-editor-select {
  font-family: var(--font-family);
  font-size: 0.95rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--container-bg);
  color: var(--text-color);
  cursor: pointer;
  min-width: 10rem;
  transition:
    border-color 0.3s ease,
    background-color 0.6s ease,
    color 0.6s ease;
}

.code-editor-workbench {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 900px) {
  .code-editor-workbench {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
}

.code-editor-pane {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--container-bg);
  overflow: hidden;
  min-height: 360px;
  transition:
    border-color 0.3s ease,
    background-color 0.6s ease;
}

.code-editor-pane-title {
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-color);
  transition:
    border-color 0.3s ease,
    background-color 0.6s ease,
    color 0.6s ease;
}

.code-editor-ace {
  flex: 1;
  min-height: 320px;
  width: 100%;
}

.code-editor-iframe {
  flex: 1;
  width: 100%;
  min-height: 320px;
  border: 0;
  background-color: #fff;
}

html.terminal-mode .code-editor-iframe {
  background-color: #1a1a1a;
}

.code-editor-status {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- CODE WORKSPACE (tabs + container) --- */
.code-page {
  margin-top: 100px;
  margin-bottom: 40px;
  width: 1200px;
  max-width: calc(100vw - 3rem);
  box-sizing: border-box;
}

.code-page-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0;
  padding: 0 0.15rem;
}

.code-tab {
  background: var(--nav-bg);
  border: 1px solid var(--border-color);
  border-bottom: none;
  color: var(--nav-text);
  padding: 0.55rem 1rem;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: bold;
  cursor: pointer;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  transition:
    color 0.25s ease,
    background-color 0.25s ease,
    border-color 0.25s ease;
}

.code-tab:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.code-tab--active {
  color: var(--accent-color);
  background-color: var(--container-bg);
  border-color: var(--border-color);
  position: relative;
  z-index: 1;
  margin-bottom: -1px;
  padding-bottom: calc(0.55rem + 1px);
}

.code-page .container {
  margin-top: 0;
  width: 100%;
  max-width: none;
  border-radius: 0 var(--border-radius) var(--border-radius) var(--border-radius);
}

@media (max-width: 600px) {
  .code-tab {
    flex: 1 1 auto;
    text-align: center;
    border-radius: var(--border-radius);
    border-bottom: 1px solid var(--border-color);
  }

  .code-tab--active {
    margin-bottom: 0;
    padding-bottom: 0.55rem;
  }

  .code-page .container {
    border-radius: var(--border-radius);
  }
}

/* --- LEARN (dictionary) --- */
.learn-subject-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.learn-tab {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.45rem 0.85rem;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: bold;
  cursor: pointer;
  border-radius: var(--border-radius);
  transition:
    border-color 0.25s ease,
    color 0.25s ease,
    background-color 0.25s ease;
}

.learn-tab:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.learn-tab--active {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--container-bg);
}

.learn-layout {
  display: grid;
  grid-template-columns: minmax(200px, 280px) 1fr;
  gap: 2rem;
  align-items: start;
}

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

.learn-letter-nav {
  margin-bottom: 1rem;
}

.learn-letter-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.learn-letter {
  min-width: 2rem;
  padding: 0.25rem 0.4rem;
  font-family: var(--font-family);
  font-size: 0.8rem;
  font-weight: bold;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: transparent;
  color: var(--accent-color);
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.learn-letter:hover:not(:disabled) {
  border-color: var(--accent-color);
  background-color: var(--container-bg);
}

.learn-letter:disabled,
.learn-letter--empty {
  color: var(--text-muted);
  border-color: var(--border-color);
  opacity: 0.45;
  cursor: not-allowed;
}

.learn-letter--active:not(:disabled) {
  background-color: var(--accent-color);
  color: var(--bg-color);
  border-color: var(--accent-color);
}

.learn-entry-list {
  min-height: 4rem;
}

.learn-hint {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
}

.learn-error {
  color: var(--text-color);
  font-style: normal;
}

.learn-entry-ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.learn-entry-li {
  margin-bottom: 0.35rem;
}

.learn-entry-name {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--text-color);
  font-family: var(--font-family);
  font-size: 0.95rem;
  padding: 0.35rem 0;
  cursor: pointer;
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
}

.learn-entry-name:hover {
  color: var(--accent-color);
}

.learn-entry-name--active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.learn-detail-title {
  margin-top: 0;
  font-size: 1.35rem;
}

.learn-detail-blurb {
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.learn-detail-sub {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

.learn-resource-grid {
  margin-top: 0;
}

.learn-thumb {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent-color);
  background-color: var(--bg-color);
  border-radius: 4px;
  margin-bottom: 1rem;
  transition:
    background-color 0.6s ease,
    color 0.6s ease;
}