/* ============================================
   Apple Firmware Download Station
   Design System
   ============================================ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  font-size: 15px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

a:hover {
  opacity: 0.75;
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  outline: none;
}

/* ---- Variables ---- */
:root {
  --color-bg: #FFFFFF;
  --color-bg-soft: #F9F9FB;
  --color-bg-secondary: #F0F0F2;
  --color-border: #E7E7EA;
  --color-border-light: #F0F0F2;
  --color-text: #0F1419;
  --color-text-secondary: #6B7280;
  --color-text-tertiary: #9CA3AF;
  --color-accent: #5046E5;
  --color-accent-light: #F0EFFD;
  --color-green: #10B981;
  --color-green-light: #DCFCE7;
  --color-red: #EF4444;
  --color-red-light: #FEE2E2;
  --color-on-accent: #FFFFFF;
  --color-logo-bg: #0F1419;
  --color-header-bg: rgba(255, 255, 255, 0.85);
  --color-header-border: rgba(231, 231, 234, 0.6);
  --color-accent-shadow-sm: rgba(80, 70, 229, 0.1);
  --color-accent-shadow-md: rgba(80, 70, 229, 0.08);
  --color-accent-shadow-xs: rgba(80, 70, 229, 0.06);
  --color-accent-border: rgba(80, 70, 229, 0.15);
  --color-version-signed-text: #248A3D;
  --color-version-signed-bg: rgba(48, 209, 88, 0.1);
  --color-version-unsigned-bg: rgba(142, 142, 147, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 100px;
  --shadow-sm: 0 1px 2px rgba(15, 20, 25, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 20, 25, 0.06);
  --shadow-lg: 0 8px 24px rgba(15, 20, 25, 0.08);
  --shadow-accent: 0 4px 12px rgba(80, 70, 229, 0.20);
  --max-width: 1200px;
}

/* ---- Dark Mode (manual toggle; system preference applied via head script) ---- */
:root[data-theme="dark"] {
  --color-bg: #0D1117;
  --color-bg-soft: #161B22;
  --color-bg-secondary: #21262D;
  --color-border: #30363D;
  --color-border-light: #21262D;
  --color-text: #E6EDF3;
  --color-text-secondary: #8B949E;
  --color-text-tertiary: #6E7681;
  --color-accent: #7B61FF;
  --color-accent-light: #1A1830;
  --color-green: #3FB950;
  --color-green-light: rgba(63, 185, 80, 0.15);
  --color-red: #F85149;
  --color-red-light: rgba(248, 81, 73, 0.15);
  --color-on-accent: #FFFFFF;
  --color-logo-bg: #E6EDF3;
  --color-header-bg: rgba(13, 17, 23, 0.85);
  --color-header-border: rgba(48, 54, 61, 0.6);
  --color-accent-shadow-sm: rgba(123, 97, 255, 0.2);
  --color-accent-shadow-md: rgba(123, 97, 255, 0.15);
  --color-accent-shadow-xs: rgba(123, 97, 255, 0.1);
  --color-accent-border: rgba(123, 97, 255, 0.25);
  --color-version-signed-text: #3FB950;
  --color-version-signed-bg: rgba(63, 185, 80, 0.15);
  --color-version-unsigned-bg: rgba(110, 118, 129, 0.2);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-accent: 0 4px 12px rgba(123, 97, 255, 0.3);
}

/* Element-specific overrides for dark mode */
:root[data-theme="dark"] .model-search input {
  background: var(--color-bg) url("data:image/svg+xml,%3Csvg width='16' height='16' viewBox='0 0 16 16' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='7' cy='7' r='5' stroke='%238B949E' stroke-width='1.5'/%3E%3Cpath d='M11 11L14 14' stroke='%238B949E' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 16px center;
}

:root[data-theme="dark"] .firmware-table tr {
  background: var(--color-bg) !important;
}

/* ---- Theme Toggle ---- */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-soft);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent-border);
  background: var(--color-accent-light);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-shadow-sm);
}

.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }

@media (max-width: 767px) {
  .header-right {
    flex: 1;
  }
}

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-header-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-header-border);
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--color-logo-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.nav-area {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-area a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.nav-area a:hover {
  color: var(--color-text);
  opacity: 1;
}

.nav-area a.active {
  color: var(--color-accent);
  font-weight: 500;
}

.search-area {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  width: 220px;
  transition: box-shadow 0.15s ease;
}

.search-area:focus-within {
  box-shadow: 0 0 0 3px var(--color-accent-shadow-sm);
}

.search-area input {
  border: none;
  background: none;
  font-size: 14px;
  width: 100%;
  color: var(--color-text);
}

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

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 72px 48px 56px;
  background: var(--color-bg-soft);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-green);
}

.hero-badge-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
}

.hero-title {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---- Stepper ---- */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 32px 48px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
}

.step {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.step.disabled {
  cursor: default;
  opacity: 0.4;
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  background: var(--color-bg-soft);
  color: var(--color-text-tertiary);
  border: 2px solid var(--color-border);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.step.active .step-number {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}

.step.completed .step-number {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.step-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.step.active .step-label {
  color: var(--color-text);
}

.step.completed .step-label {
  color: var(--color-text);
}

.step-divider {
  width: 60px;
  height: 2px;
  background: var(--color-border);
  margin: 0 16px;
  border-radius: 1px;
}

.step-divider.completed {
  background: var(--color-accent);
}

/* ---- Selection Sections ---- */
.section {
  padding: 48px;
}

.section-alt {
  background: var(--color-bg-soft);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 28px;
}

.section-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.section-badge {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 6px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
}

/* ---- Device Type Cards ---- */
.device-type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.device-type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 20px;
  gap: 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.device-type-card:hover {
  border-color: var(--color-text-tertiary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.device-type-card.selected {
  border-color: var(--color-accent);
  border-width: 2px;
  box-shadow: 0 4px 12px var(--color-accent-shadow-md);
}

.device-type-card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

.device-type-card.selected .device-type-card-icon {
  color: var(--color-accent);
}

.device-type-card-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.device-type-card-count {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.device-type-card.selected .device-type-card-count {
  color: var(--color-accent);
}

/* ---- Model Selection ---- */
.model-section {
  display: none;
}

.model-section.visible {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.model-search {
  margin-bottom: 20px;
}

.model-search input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: var(--color-bg) url("data:image/svg+xml,%3Csvg width='16' height='16' viewBox='0 0 16 16' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='7' cy='7' r='5' stroke='%236B7280' stroke-width='1.5'/%3E%3Cpath d='M11 11L14 14' stroke='%236B7280' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 16px center;
  color: var(--color-text);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.model-search input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-shadow-sm);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.model-card {
  padding: 18px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.model-card:hover {
  border-color: var(--color-text-tertiary);
  box-shadow: var(--shadow-sm);
}

.model-card.selected {
  border-color: var(--color-accent);
  border-width: 2px;
  box-shadow: 0 2px 8px var(--color-accent-shadow-xs);
}

.model-card-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.model-card-meta {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  gap: 8px;
  align-items: center;
}

.model-card-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
}

.model-card.selected .model-card-meta {
  color: var(--color-accent);
}

/* ---- Firmware Table ---- */
.firmware-section {
  display: none;
}

.firmware-section.visible {
  display: block;
  animation: fadeIn 0.3s ease;
}

.firmware-table-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.firmware-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.firmware-table thead th {
  background: var(--color-bg-soft);
  padding: 12px 20px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.firmware-table tbody tr {
  border-bottom: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: background 0.1s ease;
}

.firmware-table tbody tr:last-child {
  border-bottom: none;
}

.firmware-table tbody tr:hover {
  background: var(--color-bg-soft);
}

.firmware-table td {
  padding: 14px 20px;
  color: var(--color-text);
  vertical-align: middle;
}

.firmware-table .col-version {
  font-weight: 600;
}

.firmware-table .col-build,
.firmware-table .col-size,
.firmware-table .col-date {
  color: var(--color-text-secondary);
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px;
}

.firmware-table .col-signed {
  text-align: center;
}

.signed-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

.signed-badge.yes {
  background: var(--color-green-light);
  color: var(--color-green);
}

.signed-badge.no {
  background: var(--color-bg-soft);
  color: var(--color-text-tertiary);
}

.signed-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.signed-badge.yes .signed-badge-dot {
  background: var(--color-green);
}

.signed-badge.no .signed-badge-dot {
  background: var(--color-text-tertiary);
}

.firmware-table .col-action {
  text-align: right;
  color: var(--color-accent);
  font-weight: 500;
  white-space: nowrap;
}

/* ---- Latest Releases ---- */
.releases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.release-card {
  padding: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.release-card:hover {
  border-color: var(--color-text-tertiary);
  box-shadow: var(--shadow-sm);
}

.release-card-version {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.release-card-device {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.release-card-date {
  font-size: 12px;
  color: var(--color-text-tertiary);
  font-family: "SF Mono", "Fira Code", monospace;
}

.release-card-badge {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}

.release-card-badge.signed {
  background: var(--color-green-light);
  color: var(--color-green);
}

.release-card-badge.unsigned {
  background: var(--color-bg-soft);
  color: var(--color-text-tertiary);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-soft);
  padding: 48px 48px 24px;
  border-top: 1px solid var(--color-border-light);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand {
  flex-shrink: 0;
}

.footer-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-cols {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* ---- Firmware Detail Page ---- */

.breadcrumb {
  padding: 20px 48px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

.breadcrumb .separator {
  color: var(--color-text-tertiary);
}

.detail-main {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px;
  padding: 16px 48px 64px;
}

/* Device Info Card */
.device-info-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: sticky;
  top: 80px;
}

.device-info-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.device-illustration {
  width: 100%;
  height: 180px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.device-info-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.device-info-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.device-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.device-info-row .label {
  color: var(--color-text-secondary);
}

.device-info-row .value {
  color: var(--color-text);
  font-weight: 500;
  font-family: "SF Mono", "Fira Code", monospace;
}

.device-info-row .value.text {
  font-family: inherit;
}

/* Firmware Hero Card */
.firmware-hero-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px;
  margin-bottom: 20px;
}

.firmware-version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--color-accent-light);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.firmware-version-badge-text {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-accent);
}

.firmware-version-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.firmware-version-sub {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.firmware-meta-row {
  display: flex;
  gap: 32px;
  padding: 20px 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.firmware-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.firmware-meta-label {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.firmware-meta-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  font-family: "SF Mono", "Fira Code", monospace;
}

.firmware-meta-value.text {
  font-family: inherit;
}

.download-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-accent);
  transition: all 0.15s ease;
  flex: 1;
  justify-content: center;
}

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

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  border-color: var(--color-text-tertiary);
  box-shadow: var(--shadow-sm);
}

/* Checksum Card */
.checksum-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
}

.checksum-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.checksum-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.checksum-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.checksum-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.checksum-value {
  font-size: 13px;
  font-family: "SF Mono", "Fira Code", monospace;
  color: var(--color-text);
  word-break: break-all;
  background: var(--color-bg-soft);
  padding: 8px 12px;
  border-radius: 6px;
}

/* ---- Loading & Empty States ---- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--color-text-tertiary);
  font-size: 14px;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 10px;
}

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

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--color-text-tertiary);
  font-size: 14px;
}

/* ---- Mobile Menu Toggle ---- */
.mobile-menu-toggle {
  display: none;
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet: 768px - 1023px */
@media (max-width: 1023px) {
  .container,
  .site-header-inner {
    padding: 0 32px;
  }

  .section,
  .hero,
  .stepper,
  .site-footer,
  .breadcrumb,
  .detail-main {
    padding-left: 32px;
    padding-right: 32px;
  }

  .device-type-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .detail-main {
    grid-template-columns: 280px 1fr;
  }

  .hero-title {
    font-size: 36px;
  }
}

/* Mobile: < 768px */
@media (max-width: 767px) {
  .container,
  .site-header-inner {
    padding: 0 20px;
  }

  .section,
  .hero,
  .stepper,
  .site-footer,
  .breadcrumb,
  .detail-main {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero {
    padding-top: 48px;
    padding-bottom: 36px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  /* Header: hide nav on mobile, show search */
  .nav-area {
    display: none;
  }

  .search-area {
    width: auto;
    flex: 1;
  }

  /* Stepper: compact */
  .stepper {
    padding: 20px;
    gap: 8px;
  }

  .step-label {
    font-size: 12px;
  }

  .step-divider {
    width: 24px;
    margin: 0 4px;
  }

  /* Device type: 2 columns */
  .device-type-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Model grid: 1 column */
  .model-grid {
    grid-template-columns: 1fr;
  }

  /* Firmware table: card layout on mobile */
  .firmware-table-wrap {
    border: none;
    border-radius: 0;
  }

  .firmware-table thead {
    display: none;
  }

  .firmware-table,
  .firmware-table tbody,
  .firmware-table tr,
  .firmware-table td {
    display: block;
    width: 100%;
  }

  .firmware-table tr {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    padding: 14px 18px;
  }

  .firmware-table tbody tr {
    border-bottom: none;
  }

  .firmware-table td {
    padding: 6px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .firmware-table td::before {
    content: attr(data-label);
    font-size: 12px;
    color: var(--color-text-tertiary);
    font-weight: 500;
  }

  .firmware-table .col-version {
    font-size: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: 8px;
  }

  .firmware-table .col-version::before {
    display: none;
  }

  .firmware-table .col-action {
    padding-top: 8px;
  }

  /* Latest releases: 1 column */
  .releases-grid {
    grid-template-columns: 1fr;
  }

  /* Footer: stack */
  .footer-content {
    flex-direction: column;
    gap: 28px;
  }

  .footer-cols {
    gap: 32px;
    flex-wrap: wrap;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  /* Detail page: single column */
  .detail-main {
    grid-template-columns: 1fr;
    padding-top: 8px;
  }

  .device-info-card {
    position: static;
  }

  .firmware-hero-card {
    padding: 24px 20px;
  }

  .firmware-version-title {
    font-size: 26px;
  }

  .firmware-meta-row {
    gap: 20px;
  }

  .download-row {
    flex-direction: column;
  }

  .btn-download,
  .btn-secondary {
    width: 100%;
  }

  .checksum-card {
    padding: 20px;
  }
}

/* Small mobile: < 375px */
@media (max-width: 374px) {
  .device-type-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 24px;
  }
}

/* ============================================
   Multi-Page Architecture Styles
   ============================================ */

/* ---- Anchor Card Reset ---- */
a.device-type-card,
a.model-card,
a.release-card {
  text-decoration: none;
  color: inherit;
}

a.device-type-card:hover,
a.model-card:hover,
a.release-card:hover {
  opacity: 1;
}

/* ---- Type Description ---- */
.type-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 800px;
}

/* ---- Device Description ---- */
.device-description {
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.device-description h1 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}

.device-description p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---- Search Results Dropdown ---- */
.search-area {
  position: relative;
}

.search-results {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  max-height: 320px;
  overflow-y: auto;
  z-index: 200;
}

.search-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
  transition: background 0.1s ease;
}

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

.search-result-item:hover {
  background: var(--color-bg-soft);
  opacity: 1;
}

.search-result-name {
  font-weight: 500;
}

.search-result-id {
  font-size: 12px;
  color: var(--color-text-tertiary);
  font-family: "SF Mono", "Fira Code", monospace;
}

.search-empty {
  padding: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* ---- Firmware Section on Device Page ---- */
.firmware-section.visible {
  display: block;
}

/* ---- Ad Container (for future manual ad units) ---- */
.ad-container {
  margin: 24px 0;
  text-align: center;
}

.ad-wrapper {
  border-radius: var(--radius-md);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  padding: 16px;
  text-align: center;
}

.ad-label {
  font-size: 11px;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

/* ---- Mobile: Search Results ---- */
@media (max-width: 767px) {
  .search-results {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    border-radius: 0;
    max-height: 50vh;
  }

  .type-description {
    font-size: 13px;
  }

  .device-description {
    padding: 18px 20px;
  }

  .device-description h1 {
    font-size: 20px;
  }
}

/* ============================================
   Version Dimension Styles
   ============================================ */

/* ---- Version Card Grid ---- */
.version-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 8px;
}

a.version-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

a.version-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
  opacity: 1;
}

.version-card-version {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.version-card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.version-card-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  display: inline-block;
}

.version-card-builds {
  font-size: 11px;
  color: var(--color-text-tertiary);
  font-family: "SF Mono", "Fira Code", monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.version-card-badges {
  display: flex;
  gap: 6px;
  margin-top: 2px;
}

.version-card-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 100px;
  font-weight: 500;
}

.version-card-badge.signed {
  background: var(--color-version-signed-bg);
  color: var(--color-version-signed-text);
}

.version-card-badge.unsigned {
  background: var(--color-version-unsigned-bg);
  color: var(--color-text-tertiary);
}

/* ---- Version Search Input ---- */
.version-search {
  margin-bottom: 20px;
}

.version-search input {
  width: 100%;
  max-width: 400px;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s ease;
}

.version-search input:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* ---- Section Link (homepage) ---- */
.section-link {
  font-size: 13px;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  white-space: nowrap;
}

.section-link:hover {
  text-decoration: underline;
}

/* ---- Version Illustration ---- */
.version-illustration {
  display: flex;
  justify-content: center;
  margin: 16px 0 12px;
}

/* ---- Version Page: detail-main reuse ---- */
/* (uses existing .detail-main, .device-info-card, .device-description, .firmware-table styles) */

/* ---- Mobile: Version Cards ---- */
@media (max-width: 767px) {
  .version-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
  }

  .version-card-version {
    font-size: 18px;
  }

  a.version-card {
    padding: 14px 16px;
  }
}

/* ---- Download Count ---- */
.download-count-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  padding: 8px 14px;
  border-radius: 8px;
  margin-left: 8px;
  white-space: nowrap;
}

.download-count-badge svg {
  flex-shrink: 0;
  color: var(--color-text-tertiary);
}

.download-count-text {
  font-variant-numeric: tabular-nums;
}

.col-downloads {
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.fw-dl-count {
  font-size: 13px;
}

@media (max-width: 767px) {
  .download-count-badge {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
    justify-content: center;
  }

  .download-row {
    flex-wrap: wrap;
  }
}

/* ---- Language Switcher ---- */
.lang-switch-link {
  margin-left: 8px;
  font-size: 13px;
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.lang-switch-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  opacity: 1;
}

@media (max-width: 767px) {
  .lang-switch-link {
    display: none;
  }
}

/* ---- Legal / Disclaimer Page ---- */
.legal-page {
  padding: 16px 0 80px;
}

.legal-page-inner {
  max-width: 820px;
  margin: 0 auto;
}

.legal-page .breadcrumb {
  padding: 20px 0;
}

.legal-title {
  margin: 8px 0 6px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.legal-updated {
  margin: 0 0 24px;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.legal-intro {
  margin: 0 0 28px;
  padding: 18px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  background: var(--color-accent-light);
  border-radius: 12px;
  border-left: 3px solid var(--color-accent);
}

.legal-blocks {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.legal-block {
  padding: 22px 26px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: 14px;
}

.legal-block-title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
}

.legal-block-body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text-secondary);
}

.legal-contact {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 14px;
}

.legal-contact-label {
  color: var(--color-text-tertiary);
}

.legal-contact-email {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
}

.legal-contact-email:hover {
  text-decoration: underline;
}

@media (max-width: 767px) {
  .legal-title {
    font-size: 26px;
  }
  .legal-block {
    padding: 18px 20px;
  }
  .legal-page-inner {
    padding: 0 20px;
  }
}

/* ---- Beta Page ---- */
.beta-page {
  padding: 20px 0 60px;
}

.beta-page .legal-page-inner {
  max-width: 860px;
  margin: 0 auto;
}

.beta-section-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text);
  margin: 40px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.beta-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.beta-compare-card {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg, 12px);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.beta-compare-dev {
  border-top: 3px solid var(--color-accent);
}

.beta-compare-pub {
  border-top: 3px solid var(--color-green);
}

.beta-compare-header h3 {
  font-size: 16px;
  font-weight: 500;
  margin: 8px 0 2px;
  color: var(--color-text);
}

.beta-compare-subtitle {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.beta-compare-rows {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.beta-compare-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.beta-compare-row dt {
  font-size: 12px;
  color: var(--color-text-tertiary);
  font-weight: 400;
}

.beta-compare-row dd {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.5;
}

.beta-badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.beta-badge-dev {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border: 1px solid var(--color-accent-border);
}

.beta-badge-pub {
  background: var(--color-green-light);
  color: var(--color-green);
  border: 1px solid rgba(48, 209, 88, 0.25);
}

.beta-badge-stable {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.beta-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.beta-step {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg, 12px);
  padding: 20px 24px;
}

.beta-step-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 8px;
}

.beta-step-body {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

.beta-notice {
  margin-top: 40px;
  padding: 24px;
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--border-radius-lg, 12px);
}

.beta-notice-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 8px;
}

.beta-notice-body {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 12px;
}

.beta-notice-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.beta-notice-list li {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.beta-notice-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ---- Beta version banner on version index page ---- */
.beta-version-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg, 12px);
  margin-bottom: 24px;
}

.beta-banner-left {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.beta-banner-text {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.beta-banner-text strong {
  color: var(--color-text);
  margin-right: 6px;
}

.beta-banner-text a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

.beta-banner-text a:hover {
  text-decoration: underline;
}

@media (max-width: 767px) {
  .beta-comparison {
    grid-template-columns: 1fr;
  }

  .beta-version-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* ---- AdSense Ad Container ---- */
.ad-container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 24px;
  min-height: 50px;
  text-align: center;
}

.ad-container .adsbygoogle {
  max-width: 100%;
  margin: 0 auto;
}

@media (max-width: 767px) {
  .ad-container {
    margin: 16px auto;
    padding: 0 16px;
  }
}