/* ── Dola Video Watermark Remover Extension Design System ── */
:root {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-border: #e2e8f0;
  --bg-header: rgba(248, 250, 252, 0.88);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-dark: #09090b;

  --radius-xl: 1.5rem;
  --radius-lg: 1rem;
  --radius-md: 0.625rem;
  --radius-sm: 0.375rem;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --shadow-dark: 0 25px 50px -12px rgba(0, 0, 0, 0.35);

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: 'Ubuntu', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-weight: 400;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Sticky Top Header Navbar ── */
.app-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.header-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand:hover {
  opacity: 0.9;
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #09090b;
}

.brand-tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: #475569;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ── Desktop Navigation Menu ── */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #475569;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: transparent;
  font-family: inherit;
  white-space: nowrap;
}

.nav-link:hover {
  color: #09090b;
  background: rgba(0, 0, 0, 0.04);
}

/* ── Tools Dropdown ── */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-dropdown-btn {
  font-weight: 600;
  color: #334155;
}

.dropdown-arrow {
  transition: transform var(--transition-fast);
}

.nav-dropdown.open .dropdown-arrow,
.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  margin-top: 0.35rem;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 320px;
  background: #ffffff;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 30px -5px rgba(0, 0, 0, 0.1), 0 10px 15px -5px rgba(0, 0, 0, 0.04);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.18s;
  z-index: 150;
}

.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
  background: transparent;
  display: block;
}

.nav-dropdown.open .dropdown-menu,
.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: #f8fafc;
}

.dropdown-item-icon {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.tool-favicon-img {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  object-fit: contain;
  display: block;
}

.dropdown-item-content {
  flex: 1;
  min-width: 0;
}

.dropdown-item-title-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.dropdown-item-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: #0f172a;
}

.badge-featured {
  font-size: 0.625rem;
  font-weight: 700;
  color: #2563eb;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-current {
  font-size: 0.625rem;
  font-weight: 600;
  color: #64748b;
}

.dropdown-item-desc {
  font-size: 0.75rem;
  color: #64748b;
  margin-top: 0.2rem;
  line-height: 1.35;
}

.dropdown-ext-icon {
  color: #94a3b8;
  margin-top: 6px;
  flex-shrink: 0;
}

.dropdown-divider {
  height: 1px;
  background: #f1f5f9;
  margin: 0.35rem 0.25rem;
}

/* ── Header Actions ── */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-action-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-github {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  height: 36px;
  padding: 0 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.825rem;
  font-weight: 500;
  text-decoration: none;
  background: #09090b;
  color: #f8fafc;
  transition: all var(--transition-fast);
  line-height: 1;
  box-sizing: border-box;
}

.btn-github:hover {
  background: #27272a;
}

.btn-header-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 36px;
  padding: 0 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.825rem;
  font-weight: 600;
  color: #ffffff;
  background: #09090b;
  border: 1px solid #27272a;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
  line-height: 1;
  box-sizing: border-box;
}

.btn-header-dl:hover {
  background: #18181b;
  border-color: #3f3f46;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  color: #0f172a;
  padding: 0.35rem;
}

.mobile-nav-links {
  display: none;
}

/* ── Main Container ── */
.container {
  position: relative;
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  flex: 1;
}

/* ── Hero Section ── */
.hero-section {
  text-align: center;
  margin: 2rem auto 3.5rem;
  max-width: 860px;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: #52525b;
  margin-bottom: 1.25rem;
  letter-spacing: 0.01em;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #22c55e;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 700;
  color: #09090b;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: 1.125rem;
  color: #52525b;
  line-height: 1.65;
  max-width: 680px;
  margin: 0 auto 2.25rem;
}

.hero-description strong {
  color: #09090b;
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 48px;
  min-height: 48px;
  padding: 0 1.5rem;
  background: #09090b;
  color: #ffffff;
  border: 1px solid #18181b;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  transition: all var(--transition-normal);
  text-decoration: none;
  box-sizing: border-box;
}

.btn-hero-primary:hover {
  background: #18181b;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 48px;
  min-height: 48px;
  padding: 0 1.5rem;
  background: #ffffff;
  color: #09090b;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-hero-secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.hero-browsers-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.browsers-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: #71717a;
}

.browser-chips {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.browser-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.775rem;
  font-weight: 500;
  color: #52525b;
  padding: 0.25rem 0.5rem;
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius-md);
}

/* ── Product Showcase Preview Section ── */
.showcase-section {
  margin: 3.5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 0 650px;
}

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

.showcase-title {
  font-size: 2rem;
  font-weight: 700;
  color: #09090b;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.showcase-sub {
  font-size: 0.975rem;
  color: #64748b;
}

.showcase-browser-frame {
  background: #ffffff;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.08), 0 8px 16px -4px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.browser-frame-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: #f8fafc;
  border-bottom: 1px solid var(--bg-card-border);
  gap: 1rem;
}

.browser-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }

.browser-address-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.775rem;
  color: #475569;
  font-family: monospace;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.browser-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #16a34a;
}

.status-dot-active {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
}

.browser-frame-body {
  position: relative;
  width: 100%;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

/* ── Dark Container Quick Start Guide (Strictly Following AGENTS.md) ── */
.dark-guide-section {
  margin: 4.5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 0 1200px;
}

.dark-guide-container {
  background: #09090b;
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 2.75rem 2.25rem;
  box-shadow: var(--shadow-dark);
}

.dark-guide-header {
  text-align: left;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid #27272a;
  padding-bottom: 1.75rem;
}

.dark-guide-badge {
  font-size: 0.775rem;
  font-weight: 600;
  color: #a1a1aa;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}

.dark-guide-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.dark-guide-sub {
  font-size: 1rem;
  color: #a1a1aa;
  line-height: 1.5;
  max-width: 680px;
}

.dark-steps-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.dark-step-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
}

.dark-step-num {
  font-size: 1.85rem;
  font-weight: 700;
  color: #52525b;
  line-height: 1;
  min-width: 2.5rem;
  flex-shrink: 0;
}

.dark-step-content {
  flex: 1;
}

.dark-step-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.dark-step-desc {
  font-size: 0.95rem;
  color: #a1a1aa;
  line-height: 1.6;
}

.dark-step-desc code {
  background: #18181b;
  color: #e4e4e7;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.875rem;
  border: 1px solid #27272a;
}

.dark-link {
  color: #38bdf8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.dark-step-action {
  margin-top: 0.85rem;
}

.dark-step-img-box {
  margin-top: 1.15rem;
  border-radius: var(--radius-lg);
  border: 1px solid #27272a;
  overflow: hidden;
  background: #000000;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
  max-width: 800px;
}

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

.btn-dark-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 40px;
  min-height: 40px;
  padding: 0 1.15rem;
  background: #18181b;
  color: #ffffff;
  border: 1px solid #27272a;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-dark-action:hover {
  background: #27272a;
}

.copy-url-box {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  height: 40px;
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: var(--radius-md);
  padding: 0 0.35rem 0 0.85rem;
  box-sizing: border-box;
}

.copy-url-box code {
  color: #e4e4e7;
  font-family: monospace;
  font-size: 0.875rem;
  background: transparent;
  border: none;
  padding: 0;
}

.btn-copy-url {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  height: 30px;
  padding: 0 0.75rem;
  background: #27272a;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.775rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-copy-url:hover {
  background: #3f3f46;
}

.dark-guide-footer {
  margin-top: 2.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid #27272a;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-dark-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 48px;
  min-height: 48px;
  padding: 0 1.5rem;
  background: #ffffff;
  color: #09090b;
  border: none;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-dark-primary:hover {
  background: #f4f4f5;
}

.dark-footer-note {
  font-size: 0.85rem;
  color: #71717a;
}

/* ── Features Section (Clean Typography, No Icon Boxing) ── */
.features-section {
  margin: 4.5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 0 450px;
}

.features-header {
  text-align: center;
  margin-bottom: 2.75rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #09090b;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1rem;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem 1.75rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.feature-icon {
  color: #09090b;
  flex-shrink: 0;
}

.feature-card-body {
  display: flex;
  flex-direction: column;
}

.feature-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #09090b;
  margin-bottom: 0.35rem;
}

.feature-card-desc {
  font-size: 0.875rem;
  color: #64748b;
  line-height: 1.55;
}

/* ── How It Works Section ── */
.how-it-works-section {
  margin: 4.5rem 0;
  border-top: 1px solid var(--bg-card-border);
  padding-top: 3.5rem;
  content-visibility: auto;
  contain-intrinsic-size: 0 400px;
}

.how-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.how-item {
  display: flex;
  flex-direction: column;
}

.how-num-label {
  font-size: 0.775rem;
  font-weight: 700;
  color: #2563eb;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.how-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: #09090b;
  margin-bottom: 0.4rem;
}

.how-desc {
  font-size: 0.875rem;
  color: #64748b;
  line-height: 1.6;
}

/* ── FAQ Section (Clean Single Divider Lines per AGENTS.md) ── */
.faq-section {
  margin: 4.5rem 0;
  border-top: 1px solid var(--bg-card-border);
  padding-top: 3.5rem;
  content-visibility: auto;
  contain-intrinsic-size: 0 650px;
}

.faq-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2.5rem;
  align-items: start;
}

.faq-header-col {
  position: sticky;
  top: 6rem;
}

.faq-title {
  font-size: 2rem;
  font-weight: 700;
  color: #09090b;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
}

.faq-subtitle {
  font-size: 0.95rem;
  color: #64748b;
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.faq-quick-action {
  display: flex;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  height: 36px;
  min-height: 36px;
  padding: 0 0.95rem;
  background: #ffffff;
  color: #09090b;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-weight: 600;
  font-size: 0.825rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-secondary:hover {
  background: #f8fafc;
}

.faq-container {
  border-top: 1px solid var(--bg-card-border);
  border-bottom: 1px solid var(--bg-card-border);
}

.faq-item {
  border-bottom: 1px solid var(--bg-card-border);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  color: #09090b;
  user-select: none;
  gap: 1rem;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-q-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.faq-num {
  font-size: 0.85rem;
  font-weight: 700;
  color: #94a3b8;
  font-variant-numeric: tabular-nums;
}

.faq-icon {
  color: #94a3b8;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: #09090b;
}

.faq-answer {
  padding: 0 0 1.25rem calc(0.85rem + 1.25rem);
  font-size: 0.925rem;
  color: #52525b;
  line-height: 1.6;
}

.faq-answer code {
  background: #f1f5f9;
  color: #09090b;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85rem;
}

/* ── Bottom CTA Banner ── */
.bottom-cta-section {
  margin: 4.5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 0 320px;
}

.bottom-cta-card {
  background: #ffffff;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.bottom-cta-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #09090b;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.bottom-cta-desc {
  font-size: 1rem;
  color: #64748b;
  max-width: 540px;
  margin: 0 auto 2rem;
}

.bottom-cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-github-large {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 48px;
  min-height: 48px;
  padding: 0 1.5rem;
  background: #ffffff;
  color: #09090b;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.btn-github-large:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

/* ── Toast Notification ── */
.app-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: #09090b;
  color: #ffffff;
  padding: 0.65rem 1.15rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  z-index: 200;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.app-toast.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(12px);
}

.toast-icon {
  color: #22c55e;
}

/* ── Footer ── */
.app-footer {
  width: 100%;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  padding: 2.5rem 1.25rem;
  background: #f8fafc;
  margin-top: auto;
}

.footer-content {
  max-width: 1060px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-credit {
  font-size: 0.875rem;
  color: #64748b;
}

.footer-author-link {
  color: #09090b;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-author-link:hover {
  color: #2563eb;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-link-btn,
.footer-link {
  background: transparent;
  border: none;
  color: #64748b;
  font-size: 0.825rem;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color var(--transition-fast);
}

.footer-link-btn:hover,
.footer-link:hover {
  color: #09090b;
}

.footer-dot {
  color: #cbd5e1;
  font-size: 0.8rem;
}

.footer-sub {
  font-size: 0.775rem;
  color: #94a3b8;
}

/* ── Modals ── */
.app-modal {
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  margin: auto;
  max-width: 480px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  background: transparent;
}

.app-modal::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}

.modal-box {
  background: #ffffff;
  padding: 1.75rem;
  border-radius: var(--radius-lg);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #09090b;
  margin-bottom: 0.75rem;
}

.modal-text {
  font-size: 0.875rem;
  color: #52525b;
  line-height: 1.6;
}

.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.text-xs { font-size: 0.75rem; }

.hidden {
  display: none !important;
}

/* ── Mobile Responsiveness & Tablet Layouts ── */
@media (max-width: 900px) {
  .header-container {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }

  .nav-menu {
    display: none !important;
  }

  .header-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
  }

  .header-action-buttons {
    display: none !important;
  }

  .mobile-menu-toggle {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: transparent;
    border: 1px solid var(--bg-card-border);
    cursor: pointer;
    color: #0f172a;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-left: auto;
  }

  .mobile-menu-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
    border-color: #cbd5e1;
  }

  .hero-title {
    font-size: 2.4rem;
  }

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

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .faq-header-col {
    position: static;
  }
}

@media (max-width: 640px) {
  .header-container {
    padding: 0.65rem 0.85rem;
  }

  .brand-title {
    font-size: 1.05rem;
  }

  .brand-tag {
    display: none;
  }

  .hero-section {
    margin: 1.25rem auto 2.5rem;
  }

  .hero-badge-pill {
    font-size: 0.725rem;
    padding: 0.35rem 0.75rem;
  }

  .hero-title {
    font-size: 1.85rem;
    line-height: 1.2;
  }

  .hero-description {
    font-size: 0.925rem;
    line-height: 1.55;
    margin-bottom: 1.75rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

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

  .hero-browsers-row {
    flex-direction: column;
    gap: 0.5rem;
  }

  .browser-chips {
    justify-content: center;
  }

  .showcase-title {
    font-size: 1.5rem;
  }

  .browser-frame-topbar {
    padding: 0.65rem 0.85rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .browser-status-chip {
    font-size: 0.7rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .dark-guide-container {
    padding: 1.75rem 1rem;
    border-radius: var(--radius-lg);
  }

  .dark-guide-title {
    font-size: 1.6rem;
  }

  .dark-step-item {
    gap: 0.85rem;
  }

  .dark-step-num {
    font-size: 1.35rem;
    min-width: 1.5rem;
  }

  .dark-step-title {
    font-size: 1.05rem;
  }

  .dark-step-desc {
    font-size: 0.875rem;
  }

  .btn-dark-action {
    width: 100%;
    font-size: 0.825rem;
  }

  .copy-url-box {
    width: 100%;
  }

  .bottom-cta-card {
    padding: 2.25rem 1.25rem;
    border-radius: var(--radius-lg);
  }

  .bottom-cta-title {
    font-size: 1.65rem;
  }

  .bottom-cta-buttons {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .btn-github-large {
    width: 100%;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }
}

/* ── Mobile Slide-down Navigation Drawer ── */
.mobile-nav-links {
  display: none;
}

@media (max-width: 900px) {
  .mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    position: fixed;
    top: 58px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--bg-card-border);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
    z-index: 120;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease, visibility 0.28s;
    max-height: calc(100vh - 58px);
    overflow-y: auto;
  }

  .mobile-nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.85rem;
    color: #0f172a;
    font-weight: 500;
    font-size: 0.925rem;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
  }

  .mobile-nav-link:hover,
  .mobile-nav-link:active {
    background: #f1f5f9;
    color: #09090b;
  }

  .mobile-promo-card {
    margin-top: 0.65rem;
    padding: 0.85rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
  }

  .mobile-promo-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
  }

  .mobile-promo-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  .mobile-promo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    padding: 0.25rem 0;
  }

  .mobile-promo-info strong {
    font-size: 0.85rem;
    display: block;
    color: #0f172a;
  }

  .mobile-promo-info p {
    font-size: 0.725rem;
    color: #64748b;
  }

  .mobile-promo-ext {
    margin-left: auto;
    color: #94a3b8;
  }

  /* Mobile Drawer Action Buttons */
  .mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin-top: 0.75rem;
    padding-top: 0.85rem;
    border-top: 1px solid #e2e8f0;
  }

  .btn-mobile-dl {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    height: 44px;
    background: #09090b;
    color: #ffffff;
    border: 1px solid #18181b;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    transition: all var(--transition-fast);
  }

  .btn-mobile-dl:active {
    background: #18181b;
    transform: scale(0.99);
  }

  .btn-mobile-github {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 42px;
    padding: 0 1rem;
    background: #ffffff;
    color: #0f172a;
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    box-sizing: border-box;
  }

  .btn-mobile-github:active {
    background: #f8fafc;
  }

  .mobile-github-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .mobile-star-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.5rem;
    background: #f1f5f9;
    border-radius: 9999px;
    font-size: 0.775rem;
    font-weight: 600;
    color: #334155;
  }
}