/* Innenstadt ID 100 - Styles */
:root {
  /* Spacing */
  --pad: calc(1rem * 0.75);
  --pad-sm: 0.5rem;
  --pad-md: 1rem;
  --pad-lg: 1.5rem;
  --pad-xl: 2rem;
  --pad-2xl: 3rem;
  --gap-sm: 0.5rem;
  --gap-md: 1.5rem;
  --gap-lg: 2rem;

  /* Colors */
  --black: #000;
  --white: #fff;
  --gray-50: #fafafa; /* Backgrounds */
  --gray-100: #f5f5f5; /* Light backgrounds, borders */
  --gray-300: #ccc; /* Placeholder, disabled */
  --gray-600: #999; /* Secondary text */
  --gray-800: #666; /* Primary text */
  --gray-900: #333; /* Dark elements */

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04); /* Subtle hover effects */
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08); /* Cards, elevated elements */
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08); /* Drawers, modals */

  /* Borders */
  --border-light: 1px solid rgba(0, 0, 0, 0.06);
  --border-medium: 1px solid rgba(0, 0, 0, 0.08);
  --border-dark: 1px solid rgba(0, 0, 0, 0.12);
  --border-dashed: 1px dashed rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-filter: 0.4s ease;

  /* Backgrounds */
  --bg-glass: rgba(248, 248, 248, 0.7);
  --bg-glass-hover: rgba(255, 255, 255, 0.8);
  --bg-glass-active: rgba(255, 255, 255, 0.95);
  --bg-badge: rgba(255, 255, 255, 0.92);
  --bg-overlay: rgba(0, 0, 0, 0.32);

  /* Typography */
  --letter-spacing-tight: -0.03em;
  --letter-spacing-tighter: -0.04em;
  --letter-spacing-ultra: -0.06em;
  --letter-spacing-brand: -0.09em;

  /* Backdrop */
  --backdrop-blur: blur(20px);
  --backdrop-blur-sm: blur(8px);
}

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

body {
  font-family: "Arial Rounded MT Bold", sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: auto;
  letter-spacing: -0.03em;
}

main {
  flex: 1;
  overflow-y: auto;
  padding: var(--pad);
}

/* ========================================
   HEADER
   ======================================== */
.site-header {
  display: flex;
  height: 5rem;
}

.site-header .brand {
  flex: 0 0 50%;
  padding: var(--pad);
  display: flex;
  align-items: center;
}

.site-header .brand h1 {
  font-size: 2.5rem;
  font-weight: 300;
  margin: 0;
  letter-spacing: -0.09em;
}

/* Brand Animations */
@keyframes fadeOutText {
  0% {
    opacity: 1;
    transform: scaleX(1);
    max-width: 500px;
  }
  100% {
    opacity: 0;
    transform: scaleX(0);
    max-width: 0;
  }
}

@keyframes fadeInText {
  0% {
    opacity: 0;
    transform: scaleX(0);
    max-width: 0;
  }
  100% {
    opacity: 1;
    transform: scaleX(1);
    max-width: 500px;
  }
}

@keyframes unblurEmoji {
  0% {
    filter: blur(4px);
    opacity: 0.8;
  }
  100% {
    filter: blur(0);
    opacity: 1;
  }
}

@keyframes blurEmoji {
  0% {
    filter: blur(0);
    opacity: 1;
  }
  100% {
    filter: blur(2px);
    opacity: 0.9;
  }
}

/* Full-title (homepage) */
.brand-full .brand-text {
  display: inline;
}

.brand-full .brand-emoji {
  font-size: 1.8rem;
  vertical-align: middle;
  opacity: 0.9;
  filter: blur(2px);
  transition: filter 0.4s ease, opacity 0.4s ease;
}

.brand-full.reverse-animated .brand-text {
  display: inline-block !important;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left center;
  white-space: nowrap;
  vertical-align: middle;
  animation: fadeInText 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.brand-full.reverse-animated .brand-emoji {
  filter: blur(0);
  opacity: 1;
  animation: blurEmoji 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Compact variant (subpages) */
.brand-compact {
  font-size: 1.4rem;
  font-weight: 700;
}

.brand-compact .brand-text {
  display: inline-block;
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
  vertical-align: middle;
  width: 0;
  max-width: 0;
}

.brand-compact .brand-emoji {
  font-size: 1.6rem;
  vertical-align: middle;
  opacity: 1;
  filter: none;
  display: inline-block;
}

.brand-compact.animated .brand-text {
  opacity: 1;
  transform: scaleX(1);
  width: auto;
  max-width: 500px;
  animation: fadeOutText 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.brand-compact.animated .brand-emoji {
  filter: blur(4px);
  opacity: 0.8;
  animation: unblurEmoji 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.site-header .main-nav {
  flex: 0 0 50%;
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  background: var(--bg-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-radius: var(--radius-lg);
  padding: var(--pad-sm);
}

.site-header .main-nav a {
  text-decoration: none;
  color: var(--gray-800);
  font-size: 1.05rem;
  font-weight: 400;
  padding: var(--pad-sm) var(--pad-md);
  border-radius: var(--radius-md);
  letter-spacing: var(--letter-spacing-tighter);
  transition: all var(--transition-smooth);
  position: relative;
}

.site-header .main-nav a:hover {
  color: var(--black);
  background: var(--bg-glass-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

/* ========================================
   CONTENT PAGES
   ======================================== */
.content h2 {
  padding: 1rem 0;
}

.content p {
  padding-bottom: 1rem;
}

/* Page-specific title styles */
.container h2,
.container .page-title {
  font-size: 1.75rem;
  font-weight: 300;
  padding: 2rem 0 1.5rem 0;
  letter-spacing: -0.06em;
}

.container.about h2 {
  margin-bottom: 0.5rem;
  padding-bottom: 0;
}

.container.rules h2 {
  padding-bottom: 0;
}

.container.about p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--gray-900);
  font-weight: 300;
  margin-bottom: var(--gap-md);
  padding: 0;
  letter-spacing: var(--letter-spacing-tight);
}

.container.rules > p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--gray-800);
  font-weight: 300;
  margin-bottom: var(--pad-2xl);
  padding: 0;
  letter-spacing: var(--letter-spacing-tight);
}

.rules-list {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
}

.rule-item {
  display: flex;
  align-items: flex-start;
  gap: var(--gap-md);
  padding: var(--pad-lg);
  background: rgba(248, 248, 248, 0.6);
  border: var(--border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.rule-item:hover {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 0, 0, 0.08);
}

.rule-number {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--black) 0%, var(--gray-900) 100%);
  color: var(--white);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 1.1rem;
  letter-spacing: var(--letter-spacing-tighter);
  box-shadow: var(--shadow-md);
}

.rule-item p {
  flex: 1;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--gray-900);
  font-weight: 300;
  margin: 0;
  padding-top: 0.3rem;
  letter-spacing: var(--letter-spacing-tight);
}

/* ========================================
   GRIDS & CARDS
   ======================================== */
.container {
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container.about {
  max-width: 580px;
}

.container.rules {
  max-width: 680px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--gap-lg);
  padding: var(--gap-lg) 0;
}

.derive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  padding: var(--pad-sm) 0;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.index-grid .card-image-box {
  height: 60vh;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.index-grid a:nth-child(5n + 2) .card-image-box,
.index-grid a:nth-child(5n + 4) .card-image-box {
  border-radius: var(--radius-full);
}

.empty-state {
  padding: var(--pad-2xl);
  text-align: center;
  color: var(--gray-600);
  font-weight: 300;
  grid-column: 1 / -1;
}
.derive-card {
  display: block;
  background: var(--white);
  border: var(--border-light);
  border-radius: var(--radius-md);
  overflow: visible;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.derive-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 0, 0, 0.12);
}

.card-image-box {
  position: relative;
  height: 160px;
  overflow: hidden;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px 11px 0 0;
}

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

.no-image {
  color: var(--gray-300);
  font-weight: 300;
  font-size: 0.85rem;
  letter-spacing: var(--letter-spacing-tight);
}

.contrib-badge {
  position: absolute;
  right: 0.75rem;
  top: 0.75rem;
  background: var(--bg-badge);
  backdrop-filter: var(--backdrop-blur-sm);
  color: var(--gray-800);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-lg);
  font-size: 0.8rem;
  font-weight: 400;
  box-shadow: var(--shadow-sm);
  letter-spacing: var(--letter-spacing-tight);
}

.card-content {
  padding: 1.1rem 1.1rem 1.2rem 1.1rem;
}

.card-number {
  display: block;
  color: var(--gray-600);
  font-weight: 400;
  font-size: 0.8rem;
  letter-spacing: var(--letter-spacing-tight);
}

.card-title {
  margin-top: 0.3rem;
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: var(--letter-spacing-tighter);
}

.card-desc {
  color: var(--gray-800);
  font-size: 0.9rem;
  margin-top: 0.6rem;
  line-height: 1.5;
  max-height: 4rem;
  overflow: hidden;
  font-weight: 300;
  letter-spacing: var(--letter-spacing-tight);
}

/* ========================================
   PAGINATION
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--pad-md);
  margin-top: var(--pad-2xl);
  padding: var(--pad-lg) 0;
}

.pagination-btn {
  background: var(--gray-100);
  color: var(--gray-900);
  font-weight: 300;
  text-decoration: none;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-size: 0.95rem;
  letter-spacing: var(--letter-spacing-tight);
}

.pagination-btn:hover:not(.disabled) {
  background: #eaeaea;
  color: var(--black);
  transform: translateY(-1px);
}

.pagination-btn.disabled {
  color: var(--gray-300);
  background: transparent;
  cursor: not-allowed;
}

.page-info {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  font-size: 0.9rem;
  color: var(--gray-800);
  font-weight: 300;
  letter-spacing: var(--letter-spacing-tight);
}

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

.page-number {
  min-width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--gray-800);
  font-weight: 400;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  letter-spacing: var(--letter-spacing-tight);
}

.page-number:hover {
  background: var(--gray-100);
  color: var(--black);
}

.page-number.active {
  background: var(--black);
  color: var(--white);
  font-weight: 500;
  cursor: default;
}

.page-dots {
  color: var(--gray-600);
  padding: 0 0.25rem;
  user-select: none;
}

/* Mobile responsive adjustments */
@media (max-width: 640px) {
  .pagination {
    gap: var(--gap-sm);
  }

  .pagination-btn {
    padding: 0.65rem 0.85rem;
  }

  .pagination-label {
    display: none;
  }

  .page-numbers {
    gap: 0.25rem;
  }

  .page-number {
    min-width: 2rem;
    height: 2rem;
    font-size: 0.85rem;
  }
}

.page-current {
  font-weight: 400;
  color: var(--black);
}

.page-separator {
  color: var(--gray-300);
}

.page-total {
  color: var(--gray-600);
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--gap-lg);
  padding: var(--pad-2xl) var(--pad-xl);
  border-top: var(--border-medium);
  background: var(--gray-50);
  color: var(--gray-800);
  font-size: 0.9rem;
  margin-top: 4rem;
}

.site-footer .left {
  flex: 0 0 50%;
  padding: 0;
}

.footer-stats {
  display: flex;
  gap: var(--pad-xl);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 300;
  color: var(--black);
  letter-spacing: -0.05em;
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--gray-600);
  text-transform: lowercase;
  letter-spacing: var(--letter-spacing-tight);
}

.site-footer .right {
  flex: 0 0 50%;
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  font-weight: 300;
}

.footer-description {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray-800);
  font-weight: 300;
  display: block;
  letter-spacing: var(--letter-spacing-tight);
}

.footer-meta {
  display: flex;
  gap: var(--gap-md);
  align-items: center;
  font-size: 0.85rem;
  color: var(--gray-600);
  padding-top: var(--pad-sm);
  border-top: var(--border-light);
  letter-spacing: var(--letter-spacing-tight);
}

.site-footer .right a {
  text-decoration: none;
  color: var(--gray-800);
  transition: color var(--transition-fast);
  font-weight: 300;
}

.site-footer .right a:hover {
  color: var(--black);
}

/* ========================================
   UTILITIES
   ======================================== */
.nav-active {
  color: var(--black) !important;
  background: var(--bg-glass-active) !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.8) !important;
  font-weight: 500 !important;
}

/* ========================================
   UPLOAD FORM
   ======================================== */
.container.upload {
  max-width: 580px;
}

.form-group {
  margin-bottom: var(--gap-lg);
}
label {
  display: block;
  font-weight: 300;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
  color: var(--gray-800);
  letter-spacing: var(--letter-spacing-tight);
}

.autocomplete-input,
input[type="text"],
input[type="file"] {
  width: 100%;
  padding: 0.85rem 0.75rem;
  border: var(--border-dark);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 300;
  transition: border-color var(--transition-fast);
  background: var(--gray-50);
  letter-spacing: var(--letter-spacing-tight);
}

.autocomplete-input:focus,
input[type="text"]:focus {
  outline: none;
  border-color: rgba(0, 0, 0, 0.3);
  background: var(--white);
}

#drop-zone {
  border: var(--border-dashed);
  padding: var(--pad-2xl) var(--pad-lg);
  text-align: center;
  cursor: pointer;
  border-radius: var(--radius-md);
  background: var(--gray-50);
  transition: all var(--transition-fast);
}

#drop-zone:hover {
  border-color: rgba(0, 0, 0, 0.3);
  background: var(--gray-100);
}

#drop-zone.active {
  background: #f0f0f0;
  border-color: rgba(0, 0, 0, 0.4);
}

#drop-text {
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: var(--letter-spacing-tight);
}

#preview {
  display: none;
  margin-top: var(--pad-md);
  max-width: 100%;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.submit-btn {
  width: 100%;
  padding: 0.9rem;
  font-weight: 400;
  border-radius: var(--radius-sm);
  margin-top: var(--pad-md);
  border: none;
  transition: all var(--transition-fast);
  letter-spacing: var(--letter-spacing-tighter);
}

.submit-btn:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ========================================
   DERIVE DETAIL
   ======================================== */
.detail-container {
  max-width: 920px;
  margin: 2rem auto;
  padding: 0 2rem;
}

.detail-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: var(--pad-2xl);
  padding-bottom: var(--pad-xl);
  border-bottom: var(--border-light);
}

.meta-info {
  display: flex;
  gap: var(--gap-sm);
  align-items: center;
}

.badge-id {
  background: var(--gray-100);
  color: var(--gray-800);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-lg);
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: var(--letter-spacing-tight);
}

.detail-title {
  font-size: 2rem;
  font-weight: 300;
  margin-top: 0.5rem;
  letter-spacing: -0.07em;
  line-height: 1.3;
}

.detail-description {
  color: var(--gray-800);
  margin-top: var(--pad-sm);
  font-size: 1.05rem;
  line-height: 1.6;
  font-weight: 300;
  letter-spacing: var(--letter-spacing-tight);
}

.btn-action {
  display: inline-block;
  margin-top: 1.25rem;
  background: var(--black);
  color: var(--white);
  padding: 0.75rem var(--pad-lg);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 400;
  transition: all var(--transition-fast);
  align-self: flex-start;
  letter-spacing: var(--letter-spacing-tighter);
}

.btn-action:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.contributions-section {
  margin-top: var(--pad-xl);
}

.section-label {
  font-size: 1.2rem;
  font-weight: 300;
  margin-bottom: var(--gap-md);
  color: var(--gray-900);
  letter-spacing: -0.05em;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap-md);
}

.evidence-card {
  border: var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.evidence-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 0, 0, 0.12);
}

.evidence-img-wrapper {
  height: 180px;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.evidence-meta {
  display: flex;
  justify-content: space-between;
  padding: 0.85rem;
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--gray-600);
  gap: var(--gap-sm);
  letter-spacing: var(--letter-spacing-tight);
}

.user-tag {
  color: var(--gray-800);
  font-weight: 400;
}

.date-tag {
  color: var(--gray-600);
}

.detail-footer {
  margin-top: var(--pad-2xl);
  padding-top: var(--pad-xl);
  border-top: var(--border-light);
}

.back-link {
  text-decoration: none;
  color: var(--gray-800);
  font-weight: 300;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  letter-spacing: var(--letter-spacing-tight);
}

.back-link:hover {
  color: var(--black);
}

/* ========================================
   DRAWER
   ======================================== */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity 220ms ease;
  z-index: 90;
}

.drawer-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 50vw;
  max-width: 720px;
  background: var(--white);
  transform: translateX(100%);
  transition: transform 220ms cubic-bezier(0.2, 0.9, 0.3, 1);
  z-index: 100;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-lg);
}

body.drawer-open .drawer-backdrop {
  opacity: 1;
  visibility: visible;
}

body.drawer-open .drawer-panel {
  transform: translateX(0);
}

.drawer-close {
  position: absolute;
  right: 0.75rem;
  top: 0.75rem;
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 1.75rem;
  font-weight: 100;
  padding: 0;
  cursor: pointer;
  line-height: 1;
}

/* ========================================
   IMAGE EFFECTS
   ======================================== */
img.blur-up {
  filter: blur(12px);
  transform: scale(1.02);
  transition: filter 360ms ease, transform 360ms ease;
  will-change: filter, transform;
}

img.blur-up.loaded {
  filter: blur(0);
  transform: scale(1);
}

/* ========================================
   RESPONSIVE MEDIA QUERIES
   ======================================== */
@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
    height: auto;
    gap: 0.3rem;
    padding-bottom: 0.4rem;
  }

  .site-header .brand {
    justify-content: center;
    padding: 0.6rem 1rem;
  }

  .site-header .brand h1 {
    font-size: 1.25rem;
    text-align: center;
  }

  .site-header .main-nav {
    justify-content: center;
    gap: 0.4rem;
    padding: 0.4rem;
    flex-wrap: wrap;
    margin: 0 0.6rem;
  }

  .site-header .main-nav a {
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
    padding: 2rem 1.5rem;
  }

  .site-footer .left,
  .site-footer .right {
    flex: 1 1 100%;
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .drawer-close {
    right: 0.6rem;
    top: 0.6rem;
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1.1rem;
  }

  .drawer-panel {
    width: 100vw;
  }

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

  .index-grid .card-image-box {
    height: 40vh;
  }

  .derive-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .derive-card {
    border-radius: 8px;
  }
}