/* ==========================================================================
   CSS Variables & Base Styles
   ========================================================================== */

:root {
  /* Colors */
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: #334155;
  --color-border-light: #475569;
  
  /* Accent colors */
  --color-teal: #14b8a6;
  --color-teal-light: #2dd4bf;
  --color-blue: #3b82f6;
  --color-purple: #a855f7;
  --color-orange: #f97316;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 20px rgba(20, 184, 166, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Spacing */
  --container-max: 1280px;
  --header-height: auto;
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 50%, var(--color-bg-primary) 100%);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ==========================================================================
   Background Animation
   ========================================================================== */

.background {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.background__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: pulse 8s ease-in-out infinite;
}

.background__orb--1 {
  top: -10%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: rgba(168, 85, 247, 0.15);
}

.background__orb--2 {
  bottom: -10%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: rgba(59, 130, 246, 0.15);
  animation-delay: 2s;
}

.background__orb--3 {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: rgba(20, 184, 166, 0.1);
  animation-delay: 4s;
}

@keyframes pulse {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.1); }
}

/* ==========================================================================
   Container
   ========================================================================== */

.container {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2rem 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 2rem 1.5rem;
  }
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.header__rocket {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-teal);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.header__title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 50%, var(--color-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.header__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ==========================================================================
   Badge
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  transition: transform var(--transition-base);
}

.badge:hover {
  transform: scale(1.05);
}

.badge__icon {
  width: 1rem;
  height: 1rem;
}

.badge--teal .badge__icon { color: var(--color-teal); }
.badge--blue .badge__icon { color: var(--color-blue); }
.badge--purple .badge__icon { color: var(--color-purple); }
.badge--orange .badge__icon { color: var(--color-orange); }

/* ==========================================================================
   Tabs Navigation
   ========================================================================== */

.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tabs__button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
}

.tabs__button:hover {
  background: rgba(51, 65, 85, 0.8);
  color: var(--color-text-primary);
}

.tabs__button--active {
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 100%);
  border-color: transparent;
  color: var(--color-text-primary);
  box-shadow: var(--shadow-glow);
}

.tabs__icon {
  width: 1.125rem;
  height: 1.125rem;
}

/* ==========================================================================
   View Toggle
   ========================================================================== */

.view-toggle {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.view-toggle__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.view-toggle__btn:hover {
  background: rgba(51, 65, 85, 0.8);
  color: var(--color-text-primary);
}

.view-toggle__btn--active {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: var(--color-text-primary);
}

.view-toggle__icon {
  width: 1rem;
  height: 1rem;
}

/* ==========================================================================
   Filters
   ========================================================================== */

.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.filters__label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.filters__icon {
  width: 1rem;
  height: 1rem;
}

.filters__select {
  padding: 0.5rem 0.75rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: border-color var(--transition-base);
}

.filters__select:hover,
.filters__select:focus {
  border-color: var(--color-teal);
  outline: none;
}

.filters__reset {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  background: rgba(239, 68, 68, 0.2);
  border: none;
  border-radius: var(--radius-md);
  color: #ef4444;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition-base);
}

.filters__reset:hover {
  background: rgba(239, 68, 68, 0.3);
}

.filters__reset-icon {
  width: 1rem;
  height: 1rem;
}

/* ==========================================================================
   Month Selector
   ========================================================================== */

.months {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-light) transparent;
}

.months::-webkit-scrollbar {
  height: 6px;
}

.months::-webkit-scrollbar-track {
  background: transparent;
}

.months::-webkit-scrollbar-thumb {
  background: var(--color-border-light);
  border-radius: var(--radius-full);
}

.months__btn {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.months__btn:hover {
  background: rgba(51, 65, 85, 0.8);
  transform: translateY(-2px);
}

.months__btn--active {
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 100%);
  border-color: transparent;
  color: var(--color-text-primary);
  box-shadow: var(--shadow-glow);
}

.months__btn-name {
  font-weight: 600;
}

.months__btn-count {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: 0.25rem;
}

.months__btn--active::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-text-primary);
  border-radius: 50%;
}

/* ==========================================================================
   Content Area
   ========================================================================== */

.content {
  min-height: 400px;
}

/* Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

/* Article Card */
.article-card {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1rem;
  transition: all var(--transition-base);
}

.article-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.article-card__header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.article-card__avatar {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  position: relative;
  overflow: hidden;
}

.article-card__avatar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
}

.article-card__info {
  flex: 1;
  min-width: 0;
}

.article-card__title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color var(--transition-base);
}

.article-card:hover .article-card__title {
  color: var(--color-teal);
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.article-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.article-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 500;
}

.article-card__tag svg {
  width: 0.75rem;
  height: 0.75rem;
}

/* ==========================================================================
   Category Card (Structure View)
   ========================================================================== */

.category-card {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition-base);
}

.category-card:hover {
  border-color: var(--color-border-light);
}

.category-card__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.category-card__icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.category-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.category-card__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.category-card__stats {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
}

.category-card__stat {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

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

.subcategory {
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.subcategory__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.subcategory__title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-primary);
}

.subcategory__count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.subcategory__articles {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.subcategory__article {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.subcategory__article-avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
  flex-shrink: 0;
}

.subcategory__article-title {
  flex: 1;
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subcategory__article-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==========================================================================
   Author Card
   ========================================================================== */

.authors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.author-card {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.author-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-light);
}

.author-card__bg {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  transition: opacity var(--transition-base);
}

.author-card:hover .author-card__bg {
  opacity: 0.1;
}

.author-card__content {
  position: relative;
  z-index: 1;
}

.author-card__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.author-card__avatar {
  width: 4rem;
  height: 4rem;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  position: relative;
  overflow: hidden;
}

.author-card__avatar--hexagon {
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  border-radius: 0;
}

.author-card__avatar--circle {
  border-radius: 50%;
}

.author-card__avatar--square {
  border-radius: var(--radius-md);
}

.author-card__avatar--rounded {
  border-radius: var(--radius-xl);
}

.author-card__avatar--oval {
  border-radius: 50%;
}

.author-card__avatar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 100%);
}

.author-card__info {
  flex: 1;
}

.author-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.author-card__role {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.author-card__bio {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.author-card__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.author-card__stat {
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: center;
}

.author-card__stat-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.author-card__stat-label {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.author-card__intents {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.author-card__intent {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 500;
}

.author-card__intent--primary {
  box-shadow: 0 0 0 2px rgba(255,255,255,0.2);
}

.author-card__intent svg {
  width: 0.75rem;
  height: 0.75rem;
}

.author-card__style {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.author-card__style-icon {
  width: 1rem;
  height: 1rem;
  color: #fbbf24;
}

.author-card__style-label {
  color: var(--color-text-muted);
}

/* ==========================================================================
   Stats Section
   ========================================================================== */

.stats-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stats-card {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
}

.stats-card__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
}

.stats-card__title svg {
  width: 1.25rem;
  height: 1.25rem;
}

.stats-card--chart {
  height: 300px;
}

/* Chart placeholder */
.chart {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 1rem 0;
}

.chart__bar {
  flex: 1;
  background: linear-gradient(180deg, var(--color-teal) 0%, rgba(20, 184, 166, 0.3) 100%);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  min-height: 20px;
  transition: all var(--transition-base);
  position: relative;
}

.chart__bar:hover {
  background: linear-gradient(180deg, var(--color-teal-light) 0%, rgba(45, 212, 191, 0.4) 100%);
}

.chart__bar-label {
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.chart__bar-value {
  position: absolute;
  top: -1.25rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-teal);
}

/* Progress bars */
.progress-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.progress-item__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 8rem;
  flex-shrink: 0;
}

.progress-item__dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
}

.progress-item__text {
  font-size: 0.875rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.progress-item__bar {
  flex: 1;
  height: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-item__fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}

.progress-item__value {
  width: 2rem;
  text-align: right;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Matrix */
.matrix {
  overflow-x: auto;
}

.matrix table {
  width: 100%;
  border-collapse: collapse;
}

.matrix th,
.matrix td {
  padding: 0.75rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.matrix th {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.matrix td:first-child {
  text-align: left;
}

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

.matrix__avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
}

.matrix__name {
  font-size: 0.875rem;
  font-weight: 500;
}

.matrix__cell {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
}

.matrix__cell--primary {
  box-shadow: 0 0 0 2px rgba(255,255,255,0.2);
}

/* ==========================================================================
   Grid layouts
   ========================================================================== */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  margin-top: 3rem;
  text-align: center;
}

.footer__powered {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.footer__icon {
  width: 1rem;
  height: 1rem;
  color: #fbbf24;
}

.footer__files {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer__code {
  color: var(--color-teal);
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 0.75rem;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

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

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.empty-state__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  opacity: 0.5;
}

.empty-state__text {
  font-size: 0.9375rem;
}

/* Month info card */
.month-info {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.month-info__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.month-info__icon {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.month-info__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.month-info__title {
  font-size: 1.125rem;
  font-weight: 700;
}

.month-info__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.month-info__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.month-info__stat {
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-lg);
  padding: 0.75rem;
  text-align: center;
}

.month-info__stat-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.month-info__stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .tabs__button {
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
  }
  
  .months__btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .author-card__stats {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .progress-item__label {
    width: 6rem;
  }
}

/* Added for engine preview */
.loading-card,.error-card,.empty-state,.launch-card,.stats-card,.author-card,.article-card,.structure-card,.timeline-month,.mini-card,.tree-node {
  background: rgba(30,41,59,0.78);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}
.loading-card,.error-card,.empty-state {padding: 2rem; text-align:center; color: var(--color-text-secondary);} 
.content {display:block;}
.timeline-grid,.stats-grid,.authors-grid,.articles-grid,.structure-stack,.launch-grid {display:grid; gap:1rem;}
.timeline-grid {grid-template-columns: repeat(auto-fit,minmax(260px,1fr));}
.timeline-month {padding:1rem;}
.timeline-month__head {display:flex; justify-content:space-between; align-items:baseline; margin-bottom:0.75rem;}
.timeline-month__title {font-size:1.1rem; font-weight:800; color: var(--color-text-primary);} 
.timeline-month__count {font-size:0.9rem; color: var(--color-text-secondary);} 
.timeline-list {display:flex; flex-direction:column; gap:0.55rem;}
.timeline-item {display:flex; align-items:flex-start; justify-content:space-between; gap:0.6rem; padding:0.5rem 0.6rem; border-radius:var(--radius-lg); background:rgba(15,23,42,0.5);} 
.timeline-item__title,.tree-link,.article-card__title a,.mini-card__title a,.launch-link,.author-link {color:#c4d7ff; text-decoration:none;}
.timeline-item__title:hover,.tree-link:hover,.article-card__title a:hover,.mini-card__title a:hover,.launch-link:hover,.author-link:hover {color:#fff;}
.timeline-item__meta,.muted,.article-card__meta,.structure-card__meta,.author-card__meta {color: var(--color-text-secondary); font-size:0.85rem;}
.chip-row {display:flex; flex-wrap:wrap; gap:0.45rem; margin-bottom:0.5rem;}
.chip,.status-chip,.depth-chip,.layer-chip,.soft-chip {display:inline-flex; align-items:center; gap:0.35rem; border-radius:999px; padding:0.25rem 0.6rem; font-size:0.78rem; font-weight:700; border:1px solid var(--color-border-light);} 
.status-chip.published {background: rgba(20,184,166,0.16); color:#7beadf; border-color: rgba(20,184,166,0.35);} 
.status-chip.scheduled {background: rgba(249,115,22,0.16); color:#fdba74; border-color: rgba(249,115,22,0.35);} 
.depth-chip,.layer-chip,.soft-chip {background: rgba(59,130,246,0.12); color:#bfd5ff;}
.structure-stack {grid-template-columns:1fr;}
.structure-card {padding:1rem 1rem 0.9rem;}
.structure-card__header {display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap;}
.structure-card__title {font-size:1.1rem; font-weight:800; color: var(--color-text-primary); margin-bottom:0.25rem;}
.structure-card__path {font-size:0.85rem; color: var(--color-text-secondary); margin-bottom:0.35rem; line-height:1.45; word-break:break-word;}
.structure-columns {display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:0.85rem; margin-top:0.9rem;}
.list-box {padding:0.85rem; border:1px solid var(--color-border); border-radius:var(--radius-lg); background:rgba(15,23,42,0.45);} 
.list-box h4 {font-size:0.95rem; margin-bottom:0.6rem; color:#fff;}
.plain-list {list-style:none; display:flex; flex-direction:column; gap:0.5rem;}
.plain-list li {display:flex; align-items:flex-start; justify-content:space-between; gap:0.6rem;}
.mini-card {padding:0.7rem 0.8rem; display:flex; align-items:flex-start; justify-content:space-between; gap:0.6rem;}
.mini-card__title {font-size:0.92rem; font-weight:600; color:#fff;}
.action-links {display:flex; flex-wrap:wrap; gap:0.4rem; justify-content:flex-end;}
.action-link {text-decoration:none; border-radius:999px; padding:0.32rem 0.65rem; font-size:0.78rem; font-weight:700; border:1px solid var(--color-border-light);}
.action-link--preview {background: rgba(59,130,246,0.14); color:#c4d7ff;}
.action-link--live {background: rgba(20,184,166,0.14); color:#88f1dd;}
.articles-grid {grid-template-columns: repeat(auto-fit,minmax(300px,1fr));}
.article-card {padding:1rem; display:flex; flex-direction:column; gap:0.7rem;}
.article-card__title {font-size:1rem; font-weight:800;}
.article-card__actions {display:flex; flex-wrap:wrap; gap:0.5rem;}
.author-card {padding:1rem; display:flex; flex-direction:column; gap:0.65rem;}
.author-card__title {font-size:1rem; font-weight:800;}
.author-card__family {color: var(--color-text-secondary); font-size:0.9rem;}
.author-card__chips {display:flex; flex-wrap:wrap; gap:0.4rem;}
.stats-grid {grid-template-columns: repeat(auto-fit,minmax(220px,1fr));}
.stats-card {padding:1rem;}
.stats-card__value {font-size:1.5rem; font-weight:800; color:#fff; margin-bottom:0.2rem;}
.stats-card__label {color: var(--color-text-secondary);}
.launch-grid {grid-template-columns:repeat(auto-fit,minmax(320px,1fr));}
.launch-card {padding:1rem;}
.code-block {white-space:pre-wrap; word-break:break-word; padding:0.9rem; border-radius:var(--radius-lg); background:rgba(15,23,42,0.8); color:#e8eefc; border:1px solid var(--color-border); font-size:0.86rem; line-height:1.55;}
.copy-btn {display:inline-flex; align-items:center; justify-content:center; padding:0.55rem 0.9rem; border-radius:var(--radius-lg); border:1px solid var(--color-border-light); background:rgba(20,184,166,0.16); color:#b2fff4; cursor:pointer; font-weight:700;}
.copy-btn:hover {transform: translateY(-1px);} 
.hint-list {padding-left:1.1rem; color:var(--color-text-secondary); display:flex; flex-direction:column; gap:0.45rem;}
code.inline {background:rgba(15,23,42,0.8); border:1px solid var(--color-border); border-radius:0.45rem; padding:0.15rem 0.35rem; color:#fff;}
.footer {margin-top:2rem; text-align:center; color:var(--color-text-secondary);} 
@media (max-width: 768px) { .header__stats, .tabs {justify-content:flex-start;} .filters {flex-direction:column;} }