/* ==========================================================================
   Fabify Design System & Application Styles
   Brand Tokens: Charcoal, Fabify Green, Sky Blue, IBM Plex Mono & Poppins
   Fluid & Robust Responsiveness Across Mobile, Tablet, and Desktop
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Brand colors */
  --fab-green: #24ca70;
  --fab-green-glow: rgba(36, 202, 112, 0.28);
  --fab-green-light: #52e193;
  --sky-blue: #56cfe1;
  --lime-yellow: #d7fc00;
  --coral-red: #ff5e57;
  --tango-orange: #ff8c42;

  /* Neutrals & Dark Theme Surfaces */
  --bg-deep: #13171c;
  --bg-main: #1c2229;
  --bg-surface: #262e37;
  --bg-surface-elevated: #313b46;
  --bg-input: #191f26;

  --border-subtle: #36414e;
  --border-active: #4f5f72;
  --border-glow: #24ca70;

  /* Typography */
  --text-main: #f1f4f8;
  --text-muted: #9ba3af;
  --text-dim: #6b7684;

  --font-sans: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Dimensions & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  --header-height: 64px;
  --transition-fast: 0.16s ease;
  --transition-smooth: 0.24s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.5;
  min-height: 100vh;
  max-width: 100vw;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-active);
}

/* ==========================================================================
   Global App Header & Navigation
   ========================================================================== */
#fab-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 1.5rem;
  background: rgba(25, 31, 38, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Collapsible Brand Logo Chip / Pill (Reference: logo chip - dark cs.png)
   ========================================================================== */
.brand-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #252d37;
  border: 1.5px solid rgba(36, 202, 112, 0.35);
  border-radius: var(--radius-pill);
  padding: 4px 12px 4px 8px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), 0 0 12px rgba(36, 202, 112, 0.1);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  flex-shrink: 0;
  position: relative;
}

.brand-chip:hover {
  background: #2d3743;
  border-color: var(--fab-green);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 18px var(--fab-green-glow);
  transform: translateY(-1px);
}

.brand-chip-icon-wrap {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-chip-icon {
  width: 24px;
  height: 27px;
  filter: drop-shadow(0 0 6px var(--fab-green-glow));
  transition: transform 0.24s ease;
}

.brand-chip:hover .brand-chip-icon {
  transform: scale(1.08);
}

.brand-chip-title {
  font-size: 1.28rem;
  font-weight: 800;
  color: var(--fab-green);
  letter-spacing: -0.5px;
  line-height: 1;
  font-family: var(--font-sans);
  transition: max-width 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, margin 0.2s ease;
  white-space: nowrap;
  max-width: 120px;
  opacity: 1;
}

.brand-chip-badge {
  font-size: 0.64rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: max-width 0.3s ease, opacity 0.2s ease, padding 0.2s ease;
  max-width: 80px;
  opacity: 1;
}

.brand-chip-toggle {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3px;
  border-radius: 50%;
  margin-left: 2px;
  transition: all 0.2s ease;
}

.brand-chip-toggle:hover {
  color: var(--fab-green);
  background: rgba(36, 202, 112, 0.15);
}

.brand-chip-toggle .chevron-icon {
  width: 14px;
  height: 14px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Collapsed State: compact icon badge */
.brand-chip.collapsed {
  padding: 4px 6px 4px 6px;
  gap: 0;
  background: #1f252d;
  border-color: var(--border-subtle);
}

.brand-chip.collapsed .brand-chip-title {
  max-width: 0;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.brand-chip.collapsed .brand-chip-badge {
  max-width: 0;
  opacity: 0;
  padding: 0;
  pointer-events: none;
}

.brand-chip.collapsed .brand-chip-toggle {
  display: none;
}

/* On hover while collapsed, smoothly expand */
.brand-chip.collapsed:hover {
  padding: 4px 12px 4px 8px;
  gap: 10px;
  background: #2d3743;
  border-color: var(--fab-green);
}

.brand-chip.collapsed:hover .brand-chip-title {
  max-width: 120px;
  opacity: 1;
}

.brand-chip.collapsed:hover .brand-chip-badge {
  max-width: 80px;
  opacity: 1;
  padding: 2px 7px;
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  background: var(--bg-surface);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* User XP Badge */
.xp-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: linear-gradient(135deg, rgba(215, 252, 0, 0.15), rgba(36, 202, 112, 0.15));
  border: 1px solid rgba(215, 252, 0, 0.35);
  color: var(--lime-yellow);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  box-shadow: 0 0 12px rgba(215, 252, 0, 0.08);
  white-space: nowrap;
}

.xp-badge svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

/* User Profile Menu */
.user-menu-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px 3px 5px;
  border-radius: var(--radius-pill);
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition-fast);
}

.user-menu-btn:hover {
  border-color: var(--border-active);
  background: var(--bg-surface-elevated);
}

.user-menu-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-surface-elevated);
}

.user-name-text {
  font-size: 0.85rem;
  font-weight: 500;
  max-width: 110px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   Buttons & Inputs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--fab-green);
  color: #0b1e13;
  box-shadow: 0 0 14px var(--fab-green-glow);
}

.btn-primary:hover {
  background: var(--fab-green-light);
  transform: translateY(-1px);
  box-shadow: 0 0 18px rgba(36, 202, 112, 0.4);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-active);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.btn-sm {
  padding: 4px 9px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 11px 22px;
  font-size: 0.98rem;
  border-radius: var(--radius-md);
}

.btn svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

/* App Container */
#app-content {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Explore / Library Page
   ========================================================================== */
.library-hero {
  padding: 2.5rem 1.5rem 1.5rem;
  max-width: 1240px;
  margin: 0 auto;
  width: 100%;
}

.hero-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 1.8rem;
}

.hero-title-group h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.7px;
  line-height: 1.2;
  margin-bottom: 0.4rem;
}

.hero-title-group h1 span {
  background: linear-gradient(135deg, var(--fab-green), var(--sky-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: clamp(0.9rem, 1.8vw, 1.02rem);
  max-width: 580px;
}

.search-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.25rem;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 220px;
}

.search-input-wrap svg {
  color: var(--text-dim);
  width: 19px;
  height: 19px;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 0.92rem;
  font-family: var(--font-sans);
}

.search-input::placeholder {
  color: var(--text-dim);
}

.sort-tabs {
  display: flex;
  align-items: center;
  background: var(--bg-main);
  border-radius: var(--radius-pill);
  padding: 3px;
  border: 1px solid var(--border-subtle);
}

.sort-tab {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.sort-tab.active {
  background: var(--bg-surface-elevated);
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.tag-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 0.9rem 0 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.tag-pills::-webkit-scrollbar {
  display: none;
}

.tag-pill {
  padding: 4px 13px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
  user-select: none;
}

.tag-pill:hover, .tag-pill.active {
  background: rgba(36, 202, 112, 0.14);
  color: var(--fab-green);
  border-color: rgba(36, 202, 112, 0.4);
}

/* Library Body Grid Layout */
.library-body-layout {
  max-width: 1240px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 2rem;
}

.designs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.4rem;
}

/* Parametric Design Card */
.design-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  cursor: pointer;
  position: relative;
}

.design-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-active);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.design-thumb-wrap {
  width: 100%;
  height: 180px;
  background: radial-gradient(circle at center, #2e3843 0%, #1c232a 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.design-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.design-card:hover .design-thumb-img {
  transform: scale(1.04);
}

.design-thumb-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
}

.design-thumb-placeholder svg {
  width: 42px;
  height: 42px;
  stroke-width: 1.5;
  color: var(--fab-green);
}

.card-remix-badge {
  position: absolute;
  top: 9px;
  left: 9px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(19, 23, 28, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(86, 207, 225, 0.4);
  color: var(--sky-blue);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  z-index: 2;
}

.card-remix-badge svg {
  width: 12px;
  height: 12px;
}

.design-card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.design-card-header {
  margin-bottom: 0.4rem;
}

.design-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 4px;
}

.design-card-desc {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.design-card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.design-creator {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  flex: 1;
}

.creator-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  flex-shrink: 0;
}

.creator-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.design-social-stats {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

.stat-item.like-btn {
  padding: 3px 7px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-dim);
}

.stat-item.like-btn:hover {
  background: var(--bg-surface-elevated);
  color: #fff;
  border-color: var(--border-subtle);
}

.stat-item.liked {
  color: var(--coral-red);
}

.stat-item.liked svg {
  fill: var(--coral-red);
}

.stat-item svg {
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   Top Creators Leaderboard
   ========================================================================== */
.leaderboard-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  height: fit-content;
}

.leaderboard-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-weight: 700;
}

.leaderboard-title svg {
  color: var(--lime-yellow);
}

.creator-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.creator-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--bg-main);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: var(--transition-fast);
  gap: 8px;
}

.creator-row:hover {
  border-color: var(--border-subtle);
  background: var(--bg-surface-elevated);
}

.creator-rank-group {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}

.creator-rank-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-dim);
  width: 18px;
  text-align: center;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.creator-rank-num.gold { color: var(--lime-yellow); }
.creator-rank-num.silver { color: #d1d5db; }
.creator-rank-num.bronze { color: #f59e0b; }

.creator-info-text {
  min-width: 0;
  flex: 1;
  overflow: hidden;
}

.creator-info-text .creator-name {
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.creator-info-text .creator-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.creator-xp-pill {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--fab-green);
  background: rgba(36, 202, 112, 0.12);
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  white-space: nowrap;
}

/* ==========================================================================
   Design Detail / Customizer Page
   ========================================================================== */
.design-page-layout {
  max-width: 1240px;
  margin: 0 auto;
  width: 100%;
  padding: 1.5rem 1.5rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.design-hero-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 1.5rem;
  min-height: 520px;
}

.design-viewport-card {
  height: 100%;
  min-height: 520px;
  background: radial-gradient(circle at center, #26303b 0%, #171d24 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.detail-customizer-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  height: 100%;
  max-height: 520px;
  overflow: hidden;
  min-width: 0;
}

.detail-customizer-panel .panel-header {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.detail-customizer-panel .params-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 1.2rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  scrollbar-gutter: stable;
}

.customizer-footer {
  padding: 1.25rem;
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.customizer-footer-note {
  text-align: center;
  font-size: 0.74rem;
  color: var(--text-dim);
}

.design-detail-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
}

.detail-lineage-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(86, 207, 225, 0.12);
  border: 1px solid rgba(86, 207, 225, 0.3);
  color: var(--sky-blue);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  margin-bottom: 1.2rem;
  font-size: 0.86rem;
}

.detail-lineage-banner a {
  font-weight: 700;
  text-decoration: underline;
  color: #fff;
}

.design-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.detail-title-group {
  flex: 1;
  min-width: 240px;
}

.detail-title {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 6px;
}

.detail-creator-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.creator-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.creator-name-bold {
  font-weight: 600;
  color: #fff;
  font-size: 0.88rem;
}

.created-date-text {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.detail-actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.detail-desc {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-bottom: 1.4rem;
}

/* Discussion / Comments */
.comments-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.comments-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #fff;
}

.comment-input-wrap {
  display: flex;
  gap: 10px;
  margin-bottom: 1.5rem;
}

.comment-input {
  flex: 1;
  min-width: 0;
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 9px 13px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
}

.comment-input:focus {
  border-color: var(--fab-green);
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.comment-item {
  display: flex;
  gap: 10px;
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 12px;
}

.comment-item .user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
}

.comment-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 3px;
}

.comment-user-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: #fff;
}

.comment-time {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.comment-body {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Profile Page
   ========================================================================== */
.profile-page-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 2.5rem 1.5rem 5rem;
}

.profile-header-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.profile-header-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-width: 0;
  flex: 1;
}

.profile-avatar-lg {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--fab-green);
  flex-shrink: 0;
  object-fit: cover;
}

.profile-meta-wrap {
  min-width: 0;
  flex: 1;
}

.profile-name-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.profile-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.profile-meta-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.profile-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.profile-tabs-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.profile-tabs-group {
  display: flex;
  gap: 0.75rem;
}

.profile-tabs-group .btn {
  border-radius: 0;
  font-weight: 600;
  color: var(--text-dim);
}

.profile-tabs-group .btn.active-tab {
  color: #fff;
  font-weight: 700;
  border-bottom: 2px solid var(--fab-green);
}

/* ==========================================================================
   CAD Modeling Editor View (Studio)
   ========================================================================== */
#editor-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  overflow: hidden;
}

.editor-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 1.25rem;
  background: var(--bg-main);
  border-bottom: 1px solid var(--border-subtle);
  gap: 10px;
}

.editor-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.editor-title-input {
  background: transparent;
  border: 1px solid transparent;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition-fast);
  min-width: 0;
  flex: 1;
}

.editor-title-input:hover, .editor-title-input:focus {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
}

.remix-source-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(86, 207, 225, 0.14);
  color: var(--sky-blue);
  border: 1px solid rgba(86, 207, 225, 0.3);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.editor-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.compile-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  white-space: nowrap;
}

.compile-status-badge.ok {
  background: rgba(36, 202, 112, 0.15);
  color: var(--fab-green);
  border: 1px solid rgba(36, 202, 112, 0.3);
}

.compile-status-badge.busy {
  background: rgba(255, 140, 66, 0.15);
  color: var(--tango-orange);
  border: 1px solid rgba(255, 140, 66, 0.3);
}

.compile-status-badge.error {
  background: rgba(255, 94, 87, 0.15);
  color: var(--coral-red);
  border: 1px solid rgba(255, 94, 87, 0.3);
}

/* Mobile Tabs Bar in Studio (hidden on desktop) */
.editor-mobile-tabs {
  display: none;
}

.editor-workspace-split {
  display: grid;
  grid-template-columns: 360px 1fr 310px;
  flex: 1;
  overflow: hidden;
  height: calc(100% - 52px);
}

.editor-workspace-split.code-collapsed {
  grid-template-columns: 0px 1fr 310px;
}

/* Code Panel */
.code-panel {
  background: #11151a;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition-smooth);
}

.panel-header {
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  user-select: none;
}

.code-editor-wrap {
  display: flex;
  flex: 1;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}

.line-numbers {
  padding: 12px 8px;
  color: var(--text-dim);
  text-align: right;
  user-select: none;
  background: #0d1014;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
  white-space: pre;
}

.code-textarea {
  flex: 1;
  padding: 12px 14px;
  background: transparent;
  border: none;
  outline: none;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  resize: none;
  white-space: pre;
  overflow: auto;
  tab-size: 2;
}

/* Viewport Panel */
.viewport-panel {
  position: relative;
  background: radial-gradient(circle at center, #242c36 0%, #151a20 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.viewport-canvas-container {
  width: 100%;
  height: 100%;
}

.viewport-controls-overlay {
  position: absolute;
  bottom: 14px;
  left: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10;
}

.viewport-controls-overlay .btn {
  background: rgba(25, 31, 38, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  color: #fff;
}

.viewport-controls-overlay .btn:hover {
  background: rgba(36, 46, 56, 0.95);
  border-color: var(--border-active);
}

.loading-indicator {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(20, 25, 32, 0.9);
  backdrop-filter: blur(8px);
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.88rem;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 15;
}

.loading-indicator.hidden {
  opacity: 0;
  visibility: hidden;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--fab-green);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.error-banner {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  background: rgba(255, 94, 87, 0.16);
  border: 1px solid rgba(255, 94, 87, 0.4);
  color: #ff9d99;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  white-space: pre-wrap;
  display: none;
  z-index: 20;
}

.error-banner.visible {
  display: block;
}

/* Parameters Panel */
.params-panel {
  background: var(--bg-main);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.params-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  scrollbar-gutter: stable;
}

.param-group {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem;
}

.param-group-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--sky-blue);
  margin-bottom: 0.75rem;
}

.param-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 0.75rem;
}

.param-field:last-child {
  margin-bottom: 0;
}

.param-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  width: 100%;
}

.param-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: #fff;
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.param-value-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fab-green);
  font-weight: 600;
  flex-shrink: 0;
  white-space: nowrap;
}

.param-slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  outline: none;
}

.param-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--fab-green);
  cursor: pointer;
  box-shadow: 0 0 6px var(--fab-green-glow);
  transition: transform 0.1s;
}

.param-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.param-select, .param-input {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: #fff;
  padding: 6px 9px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  outline: none;
}

.param-select:focus, .param-input:focus {
  border-color: var(--fab-green);
}

.param-checkbox-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.param-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--fab-green);
  cursor: pointer;
}

/* ==========================================================================
   Modals, Toasts, Dropdowns
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 18, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: min(500px, 92vw);
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
  padding: 1.8rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  transform: translateY(14px);
  transition: transform var(--transition-smooth);
}

.modal-overlay.open .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  font-size: 1.4rem;
  line-height: 1;
  border-radius: var(--radius-sm);
}

.modal-close-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.modal-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 1.1rem;
}

.modal-form-group label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
}

.modal-form-group input, .modal-form-group textarea {
  background: var(--bg-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 9px 12px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
}

.modal-form-group input:focus, .modal-form-group textarea:focus {
  border-color: var(--fab-green);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  max-width: calc(100vw - 40px);
}

.toast-msg {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-active);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  pointer-events: auto;
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Comprehensive Responsive Breakpoints (Tablet & Mobile)
   ========================================================================== */

/* Tablet & Small Desktop (<=960px) */
@media (max-width: 960px) {
  .library-body-layout {
    grid-template-columns: 1fr;
    padding: 0 1.25rem 3rem;
  }

  .design-hero-stage {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .design-viewport-card {
    min-height: 380px;
    height: 380px;
  }

  .detail-customizer-panel {
    max-height: none;
    height: auto;
  }

  .detail-customizer-panel .params-scroll-area {
    max-height: 360px;
  }

  .search-filter-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem;
    gap: 0.85rem;
  }

  .search-input-wrap {
    min-width: 100%;
    width: 100%;
  }

  .sort-tabs {
    width: 100%;
    display: flex;
    justify-content: space-between;
  }

  .sort-tab {
    flex: 1;
    text-align: center;
    padding: 6px 10px;
  }
}

/* Mobile & Small Tablet (<=900px) for CAD Editor (Studio) */
@media (max-width: 900px) {
  .editor-mobile-tabs {
    display: flex !important;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border-subtle);
    height: 42px;
    width: 100%;
    flex-shrink: 0;
  }

  .editor-tab-btn {
    flex: 1;
    height: 100%;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .editor-tab-btn.active {
    color: var(--fab-green);
    border-bottom-color: var(--fab-green);
    background: rgba(36, 202, 112, 0.08);
  }

  .editor-workspace-split {
    display: block !important;
    height: calc(100vh - var(--header-height) - 48px - 42px) !important;
    position: relative !important;
    overflow: hidden;
    width: 100%;
  }

  .editor-workspace-split .code-panel,
  .editor-workspace-split .viewport-panel,
  .editor-workspace-split .params-panel {
    display: none !important;
    width: 100% !important;
    height: 100% !important;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }

  .editor-workspace-split.view-active .viewport-panel {
    display: flex !important;
  }

  .editor-workspace-split.params-active .params-panel {
    display: flex !important;
  }

  .editor-workspace-split.code-active .code-panel {
    display: flex !important;
  }

  #ed-btn-toggle-code {
    display: none;
  }
}

/* Mobile Devices (<=768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  #fab-nav {
    padding: 0 0.85rem;
    gap: 8px;
  }

  .brand-chip {
    padding: 3px 8px 3px 6px;
    gap: 6px;
  }

  .brand-chip-icon-wrap {
    width: 26px;
    height: 26px;
  }

  .brand-chip-icon {
    width: 20px;
    height: 23px;
  }

  .brand-chip-title {
    font-size: 1.14rem;
  }

  .brand-chip-badge {
    display: none;
  }

  .nav-links {
    gap: 0.35rem;
  }

  .nav-link {
    padding: 4px 8px;
    font-size: 0.84rem;
  }

  .nav-actions {
    gap: 6px;
  }

  .xp-badge {
    padding: 3px 8px;
    font-size: 0.74rem;
  }

  .user-name-text {
    display: none;
  }

  .user-menu-btn {
    padding: 2px;
    border-radius: 50%;
  }

  .btn-text-desktop {
    display: none !important;
  }

  .nav-btn-new-design {
    padding: 6px 10px;
    border-radius: var(--radius-md);
  }

  .library-hero {
    padding: 1.5rem 1rem 1rem;
    overflow-x: hidden;
  }

  .hero-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.2rem;
  }

  .tag-pills {
    padding: 0.75rem 0 4px;
  }

  .library-body-layout {
    padding: 0 1rem 3rem;
  }

  .designs-grid {
    grid-template-columns: 1fr;
  }

  /* Design Detail Page on Mobile */
  .design-page-layout {
    padding: 1rem 1rem 4rem;
    gap: 1.25rem;
    overflow-x: hidden;
  }

  .design-viewport-card {
    min-height: 310px;
    height: 310px;
  }

  .design-detail-info-card {
    padding: 1.25rem;
  }

  .design-title-row {
    flex-direction: column;
    gap: 0.85rem;
  }

  .detail-title {
    font-size: 1.35rem;
  }

  .detail-actions-row {
    width: 100%;
    display: flex;
    gap: 8px;
  }

  .detail-actions-row .btn {
    flex: 1;
    white-space: nowrap;
    padding: 8px 10px;
  }

  #detail-btn-download-stl {
    white-space: normal;
    text-align: center;
    line-height: 1.25;
    padding: 10px 14px;
    font-size: 0.92rem;
  }

  .detail-creator-row {
    flex-wrap: wrap;
    gap: 8px;
  }

  .comment-input-wrap {
    flex-direction: column;
  }

  .comment-input-wrap .btn {
    width: 100%;
  }

  /* Editor Topbar on Mobile */
  .editor-topbar {
    padding: 0 0.5rem;
    height: 48px;
    gap: 6px;
  }

  .editor-title-wrap {
    gap: 6px;
    flex: 1;
    min-width: 0;
  }

  .editor-title-input {
    font-size: 0.88rem;
    max-width: 130px;
    padding: 3px 5px;
  }

  .editor-toolbar-actions {
    gap: 4px;
    flex-shrink: 0;
  }

  .editor-toolbar-actions .btn {
    padding: 5px 8px;
  }

  .compile-status-badge {
    padding: 2px 7px;
    font-size: 0.72rem;
  }
}

/* Extra Small Screens (<=420px) */
@media (max-width: 420px) {
  #fab-nav {
    padding: 0 0.5rem;
    gap: 4px;
  }

  .brand-chip {
    padding: 3px 5px;
    gap: 0;
  }

  .brand-chip-title {
    display: none;
  }

  .brand-chip-badge {
    display: none;
  }

  .brand-chip-toggle {
    display: none;
  }

  .nav-links {
    gap: 2px;
  }

  .nav-link {
    padding: 3px 6px;
    font-size: 0.8rem;
  }

  .xp-badge {
    display: none;
  }

  .editor-title-input {
    max-width: 95px;
    font-size: 0.82rem;
  }

  .modal-dialog {
    padding: 1.25rem;
  }
}