/* Design System Variables */
:root {
  --font-sans: 'Inter', 'Noto Sans KR', sans-serif;
  --font-serif: 'Nanum Myeongjo', serif;
  --font-mono: 'Fira Code', monospace;
  
  /* System Colors */
  --bg-primary: #090d16;
  --bg-secondary: rgba(17, 24, 39, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --card-blur: 16px;
  
  --transition-speed: 0.3s;
}

/* Base resets & scrollbars */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::-webkit-scrollbar {
  width: 10px;
}
body::-webkit-scrollbar-track {
  background: #060910;
}
body::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 5px;
}
body::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Background Grids & Ambient Effects */
.ambient-glow {
  position: fixed;
  top: -10%;
  left: 20%;
  width: 60vw;
  height: 60vh;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(168, 85, 247, 0.05) 50%, rgba(0,0,0,0) 100%);
  z-index: -2;
  filter: blur(100px);
  pointer-events: none;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  pointer-events: none;
}

/* Navigation & Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(10, 15, 26, 0.7);
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--success-color);
  filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.4));
  animation: pulse-logo 4s infinite ease-in-out;
}

.logo-text {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #10b981, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 0.5rem;
}

.nav-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-speed);
}

.nav-btn svg {
  width: 16px;
  height: 16px;
}

.nav-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.nav-btn.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 0 15px var(--accent-glow);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  background: transparent !important;
  border-color: transparent !important;
}

/* Content Container & Tabs */
.app-content {
  flex: 1;
  padding: 2.5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.tab-pane.active {
  display: block;
}

/* Hero Section */
.hero-section {
  display: flex;
  gap: 4rem;
  align-items: center;
  margin-bottom: 4rem;
  background: rgba(13, 20, 35, 0.4);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: 24px;
  backdrop-filter: blur(var(--card-blur));
}

.novel-cover-wrapper {
  perspective: 1000px;
}

.novel-cover {
  width: 230px;
  height: 330px;
  background: linear-gradient(145deg, #111827 0%, #030712 100%);
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 40px rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem;
  transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
  transform-style: preserve-3d;
  cursor: pointer;
}

.novel-cover:hover {
  transform: translateY(-8px) rotateY(-5deg) scale(1.02);
}

.cover-glare {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0) 60%);
  pointer-events: none;
}

.cover-matrix {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background: repeating-linear-gradient(0deg, rgba(16, 185, 129, 0.15) 0px, rgba(16, 185, 129, 0.15) 1px, transparent 1px, transparent 4px);
  z-index: 1;
}

.cover-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cover-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 3px;
  color: var(--success-color);
}

.cover-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  line-height: 1.3;
  color: #fff;
  font-weight: 700;
  text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  margin-top: 1rem;
}

.cover-author {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 2rem;
}

.cover-footer {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 1px;
  color: #4b5563;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: var(--success-color);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--success-color);
  animation: pulse-dot-anim 1.5s infinite ease-in-out;
}

.pulse-dot.red {
  background-color: var(--danger-color);
  box-shadow: 0 0 8px var(--danger-color);
}

.novel-info {
  flex: 1;
}

.novel-badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #818cf8;
  margin-bottom: 1.25rem;
}

.novel-title-kr {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 1.25rem;
  background: linear-gradient(90deg, #fff, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.novel-synopsis {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 750px;
}

.novel-meta-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.novel-meta-tags span {
  padding: 0.3rem 0.6rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-radius: 6px;
}

.quick-stats {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.q-stat-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: 12px;
  min-width: 140px;
}

.q-stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 0.4rem;
}

.q-stat-val {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.primary-btn {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 0.9rem 1.8rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.primary-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.5);
}

.primary-btn:active {
  transform: translateY(0);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.8rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-speed);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

/* Chapter Directory (Grid) */
.chapter-directory {
  margin-top: 3rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.5px;
}

.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.chapter-card {
  background: rgba(20, 27, 45, 0.3);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 16px;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 180px;
}

.chapter-card:hover {
  background: rgba(99, 102, 241, 0.05);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-color);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  display: block;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 0.75rem;
  margin-top: 1rem;
}

.loading-spinner {
  border: 3px solid rgba(255,255,255,0.05);
  border-top: 3px solid var(--accent-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  grid-column: 1 / -1;
  margin: 4rem auto;
}

/* TAB 2: READER MODE DESIGN */
.reader-container {
  display: flex;
  flex-direction: column;
  background: rgba(13, 20, 35, 0.35);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  backdrop-filter: blur(var(--card-blur));
  overflow: hidden;
}

.reader-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: rgba(10, 15, 26, 0.8);
  border-bottom: 1px solid var(--border-color);
}

.toolbar-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
}

.toolbar-btn svg {
  width: 20px;
  height: 20px;
}

.toolbar-btn:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.reader-chapter-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.toolbar-right {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.tts-group {
  display: flex;
  gap: 0.25rem;
}

.progress-container {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.03);
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width 0.1s ease;
}

/* Reader Viewport & Paper */
.reader-viewport {
  max-height: calc(100vh - 280px);
  min-height: 450px;
  overflow-y: auto;
  padding: 3.5rem 2rem;
  display: flex;
  justify-content: center;
  line-height: 1.8;
  transition: background var(--transition-speed), color var(--transition-speed);
}

.reader-paper {
  max-width: 680px;
  width: 100%;
}

.reader-paper p {
  margin-bottom: 1.5rem;
  white-space: pre-wrap;
}

.reader-paper h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  line-height: 1.3;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.5rem;
}

/* Reader Navigation Buttons */
.reader-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  background: rgba(10, 15, 26, 0.5);
  border-top: 1px solid var(--border-color);
}

.reader-navigation button {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-speed);
}

.reader-navigation button:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--text-secondary);
}

.reader-navigation button svg {
  width: 16px;
  height: 16px;
}

.nav-toc-btn {
  font-size: 0.9rem;
  color: var(--text-secondary) !important;
}

/* Settings Dropdown Container */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  background: #111827;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  width: 260px;
  padding: 1.25rem;
  z-index: 10;
  animation: slideDown 0.2s ease forwards;
}

.dropdown-content.show {
  display: block;
}

.setting-item {
  margin-bottom: 1rem;
}

.setting-item:last-child {
  margin-bottom: 0;
}

.setting-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  display: block;
}

.size-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.25rem;
}

.size-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.9rem;
}

.size-btn:hover {
  background: rgba(255,255,255,0.08);
}

.spacing-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.25rem;
}

.spacing-btn {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.spacing-btn:hover {
  color: var(--text-primary);
}

.spacing-btn.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent-color);
  color: var(--text-primary);
}

#font-select {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 8px;
  font-family: var(--font-sans);
  outline: none;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.theme-select-btn {
  height: 32px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.theme-select-btn.active {
  border-color: var(--accent-color);
}

.theme-light-btn { background: #fafafa; }
.theme-sepia-btn { background: #f4ecd8; }
.theme-dark-btn { background: #1e293b; }
.theme-observer-btn { background: #000; border: 1px solid #10b981 !important; }
.theme-observer-btn.active { border: 2px solid #10b981 !important; }

/* Font Family Classes for Reader */
.font-myeongjo {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.font-gothic {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.font-monospace {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0;
}

/* Reader Spacing Classes */
.spacing-tight-val { line-height: 1.5; }
.spacing-normal-val { line-height: 1.9; }
.spacing-wide-val { line-height: 2.3; }

/* Dynamic Reader Themes (applied to reader-viewport) */
.theme-light {
  background: #fdfdfd;
  color: #1e293b;
}
.theme-light .reader-paper h2 {
  border-bottom-color: rgba(0, 0, 0, 0.05);
}

.theme-sepia {
  background: #f4ecd8;
  color: #4b3621;
}
.theme-sepia .reader-paper h2 {
  border-bottom-color: rgba(0, 0, 0, 0.05);
}

.theme-dark {
  background: rgba(13, 20, 35, 0.4);
  color: #cbd5e1;
}

.theme-observer {
  background: #000000;
  color: #10b981;
  font-family: var(--font-mono) !important;
}
.theme-observer .reader-paper h2 {
  color: #10b981;
  border-bottom-color: #047857;
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

/* TAB 3: WRITING & UPLOAD PORTAL */
.write-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
}

.editor-container {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(var(--card-blur));
  height: 680px;
}

.panel-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.panel-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.editor-header {
  margin-bottom: 1.5rem;
}

.editor-meta-inputs {
  display: flex;
  gap: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-group.flex-grow {
  flex-grow: 1;
}

.input-group label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.input-group input, .input-group select {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.65rem;
  border-radius: 8px;
  outline: none;
  font-family: var(--font-sans);
  transition: all var(--transition-speed);
}

.input-group input:focus, .input-group select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px rgba(99,102,241,0.15);
}

.editor-body-wrapper {
  flex-grow: 1;
  margin-bottom: 1.5rem;
}

#editor-textarea {
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 1.25rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.8;
  outline: none;
  resize: none;
  transition: all var(--transition-speed);
}

#editor-textarea:focus {
  border-color: var(--accent-color);
  background: rgba(255,255,255,0.03);
}

.editor-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.char-count {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Upload Sidebar */
.upload-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.upload-card {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 1.75rem;
  backdrop-filter: blur(var(--card-blur));
}

.dropzone {
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-speed);
  background: rgba(255,255,255,0.01);
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-color);
  background: rgba(99, 102, 241, 0.03);
}

.upload-icon {
  width: 44px;
  height: 44px;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.dropzone p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.file-hint {
  font-size: 0.75rem;
  color: #4b5563;
  display: block;
}

.hidden {
  display: none !important;
}

.file-info-preview {
  margin-top: 1.25rem;
  padding: 1rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-icon-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.file-icon-text svg {
  width: 18px;
  height: 18px;
  color: var(--accent-color);
}

.upload-status {
  margin-top: 1rem;
  font-size: 0.85rem;
  text-align: center;
}

.upload-status.success {
  color: var(--success-color);
}

.upload-status.error {
  color: var(--danger-color);
}

.notice-card {
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.15);
  border-radius: 16px;
  padding: 1.5rem;
  backdrop-filter: blur(var(--card-blur));
}

.notice-card h4 {
  font-size: 0.9rem;
  color: #fca5a5;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notice-card p {
  font-size: 0.8rem;
  color: #f87171;
  line-height: 1.6;
}

/* TAB 4: OBSERVATION CONSOLE (DASHBOARD) */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.console-card {
  background: rgba(13, 20, 35, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(var(--card-blur));
  display: flex;
  flex-direction: column;
}

.console-card.full-width {
  grid-column: 1 / -1;
}

.console-card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.console-card-header h4 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.console-card-header .tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--success-color);
  letter-spacing: 1px;
}

/* Stats Summary */
.dashboard-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  height: 100%;
}

.db-stat-item {
  background: rgba(255,255,255,0.015);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.db-stat-val {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.db-stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Search Console */
.search-input-wrapper {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

#search-input {
  flex-grow: 1;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

#search-input:focus {
  border-color: var(--accent-color);
}

.search-results-list {
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  height: 200px;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.empty-state {
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
  margin: auto;
}

.search-result-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  padding-bottom: 0.75rem;
}

.search-result-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.search-res-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  margin-bottom: 0.4rem;
}

.search-res-chap {
  font-family: var(--font-mono);
  color: var(--accent-color);
  font-weight: 600;
  cursor: pointer;
}

.search-res-chap:hover {
  text-decoration: underline;
}

.search-res-count {
  color: var(--success-color);
}

.search-res-snippets {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  background: rgba(255,255,255,0.01);
  padding: 0.5rem;
  border-left: 2px solid var(--accent-color);
  border-radius: 0 4px 4px 0;
}

.search-match-highlight {
  background: rgba(245, 158, 11, 0.25);
  color: #fff;
  border-radius: 2px;
  padding: 0 2px;
  font-weight: 600;
}

/* Charts & Lists (Row 3) */
.chart-layout-wrapper {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 2rem;
  align-items: flex-start;
}

.chart-container {
  background: rgba(255,255,255,0.015);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 16px;
  width: 100%;
}

.chart-container h5 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.chart-caption {
  font-size: 0.75rem;
  color: #4b5563;
  margin-top: 1rem;
}

/* Waveform Graph Render */
.waveform-chart {
  display: flex;
  align-items: flex-end;
  height: 180px;
  gap: 6px;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.waveform-bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-width: 20px;
  cursor: pointer;
}

.waveform-bar {
  width: 100%;
  background: var(--accent-gradient);
  border-radius: 4px 4px 0 0;
  transition: height 1s ease, filter var(--transition-speed);
  position: relative;
}

.waveform-bar.high-tension {
  background: linear-gradient(135deg, var(--danger-color) 0%, var(--warning-color) 100%);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.3);
}

.waveform-bar-wrapper:hover .waveform-bar {
  filter: brightness(1.2) drop-shadow(0 0 8px var(--accent-color));
}

.waveform-bar-wrapper:hover .waveform-bar.high-tension {
  filter: brightness(1.2) drop-shadow(0 0 8px var(--danger-color));
}

.waveform-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  transform: rotate(-45deg);
  white-space: nowrap;
  height: 25px;
}

.waveform-tooltip {
  position: absolute;
  bottom: 105%;
  background: #1f2937;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.2s, transform 0.2s;
  z-index: 5;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.waveform-bar-wrapper:hover .waveform-tooltip {
  opacity: 1;
  transform: translateY(0);
}

/* Keyword Frequency Dashboard list */
.keywords-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.kw-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.kw-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 500;
}

.kw-name {
  color: var(--text-primary);
}

.kw-val {
  font-family: var(--font-mono);
  color: var(--success-color);
}

.kw-bar-track {
  height: 8px;
  background: rgba(255,255,255,0.03);
  border-radius: 50px;
  width: 100%;
  overflow: hidden;
}

.kw-bar-fill {
  height: 100%;
  border-radius: 50px;
  background: linear-gradient(90deg, var(--accent-color) 0%, var(--success-color) 100%);
  width: 0%;
  transition: width 1s ease-out;
}

/* Footer Section */
.app-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #060910;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #4b5563;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-indicator.online {
  background: var(--success-color);
  box-shadow: 0 0 6px var(--success-color);
}

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

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse-logo {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.4)); opacity: 1; }
  50% { filter: drop-shadow(0 0 2px rgba(16, 185, 129, 0.1)); opacity: 0.7; }
}

@keyframes pulse-dot-anim {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.5; }
}

/* Responsive layout adjustments */
@media (max-width: 1024px) {
  .hero-section {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
    padding: 2rem;
  }
  .write-grid {
    grid-template-columns: 1fr;
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .chart-layout-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }
  .app-content {
    padding: 1.5rem 1rem;
  }
}