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

:root {
  --bg: #000000;
  --bg-surface: #06060a;
  --bg-elevated: #0f0f13;
  --bg-card: #16161c;
  --border: #222228;
  --border-contrast: #3f3f46;
  --text-pri: #ffffff;
  --text-sec: #9a9aa8;
  --text-muted: #5a5a68;
  --cyan: #06b6d4;
  --card-gradient: linear-gradient(180deg, rgba(22, 22, 28, 0.8) 0%, rgba(15, 15, 19, 0.95) 100%);
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Aliases for multi-page templates */
  --bg-primary: var(--bg);
  --bg-surface-elevated: var(--bg-elevated);
  --bg-glass: var(--glass);
  --border-subtle: var(--border);
  --border-active: var(--border-contrast);
  --text-primary: var(--text-pri);
  --text-secondary: var(--text-sec);
  --text-inverse: #000000;
  --btn-primary-bg: #ffffff;
  --btn-primary-text: #000000;
  --btn-secondary-bg: var(--bg-elevated);
  --btn-secondary-text: #ffffff;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.2s ease;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-surface: #f5f5f7;
  --bg-elevated: #efeff1;
  --bg-card: #e8e8ea;
  --border: #dddde0;
  --border-contrast: #bbbbc0;
  --text-pri: #000000;
  --text-sec: #5a5a68;
  --text-muted: #888888;
  --cyan: #0891b2;
  --card-gradient: linear-gradient(180deg, rgba(245, 245, 247, 0.9) 0%, rgba(239, 239, 241, 0.95) 100%);
  --glass: rgba(0, 0, 0, 0.03);
  --glass-border: rgba(0, 0, 0, 0.1);

  /* Aliases for multi-page templates */
  --bg-primary: var(--bg);
  --bg-surface-elevated: var(--bg-elevated);
  --bg-glass: var(--glass);
  --border-subtle: var(--border);
  --border-active: var(--border-contrast);
  --text-primary: var(--text-pri);
  --text-secondary: var(--text-sec);
  --text-inverse: #ffffff;
  --btn-primary-bg: #000000;
  --btn-primary-text: #ffffff;
  --btn-secondary-bg: var(--bg-elevated);
  --btn-secondary-text: #000000;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

body {
  background-color: var(--bg);
  color: var(--text-pri);
  font-family: var(--font-main);
  overflow-x: hidden;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* ── Container ───────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-narrow {
  max-width: 850px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Floating Navigation ─────────────────────────────────────────────────── */
.nav-container {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}

.nav-inner {
  pointer-events: auto;
  width: 100%;
  max-width: 1100px;
  height: 64px;
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 32px;
  width: auto;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-pri);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a, .nav-link {
  color: var(--text-sec);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-links a:hover, .nav-link:hover, .nav-link.active {
  color: var(--text-pri);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-pri);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
}

.btn-primary, .btn.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 24px;
  background: var(--text-pri);
  color: var(--bg);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
}

.btn-primary:hover, .btn.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.btn-secondary, .btn.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 24px;
  background: var(--bg-elevated);
  color: var(--text-pri);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--border-contrast);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover, .btn.btn-secondary:hover {
  background: var(--bg-card);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* ── Hero Section ────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 20px 80px;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-badge i {
  color: var(--cyan);
}

.hero-badge-gradient {
  background: linear-gradient(135deg, #FFFFFF 0%, #A1A1AA 50%, #FFFFFF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: 0.8px;
}

[data-theme="light"] .hero-badge-gradient {
  background: linear-gradient(135deg, #09090B 0%, #52525B 50%, #09090B 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  max-width: 950px;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--text-sec);
  max-width: 680px;
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

/* ── Interactive Showcase Card ───────────────────────────────────────────── */
.app-preview-card {
  width: 100%;
  max-width: 1000px;
  background: var(--bg-card);
  border: 1px solid var(--border-contrast);
  border-radius: 28px;
  padding: 32px;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  text-align: left;
}

@media (max-width: 800px) {
  .app-preview-card {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}

.crypto-terminal {
  background: #000000;
  border-radius: 18px;
  border: 1px solid #222228;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #06b6d4;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.t-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.t-red { background: #ef4444; }
.t-yellow { background: #eab308; }
.t-green { background: #22c55e; }

/* ── Features Grid ───────────────────────────────────────────────────────── */
.section {
  padding: 100px 20px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-sec);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
  transition: transform 0.2s, border-color 0.2s;
}

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

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-pri);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.feature-desc {
  color: var(--text-sec);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ── Comparison Matrix ───────────────────────────────────────────────────── */
.matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-surface);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-top: 40px;
}

.matrix-table th, .matrix-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.matrix-table th {
  background: var(--bg-elevated);
  font-weight: 800;
  color: var(--text-pri);
}

.matrix-highlight {
  background: rgba(6, 182, 212, 0.08);
  font-weight: 700;
  color: var(--cyan);
}

/* ── FAQ Accordion ───────────────────────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 850px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  cursor: pointer;
}

.faq-q {
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-a {
  margin-top: 14px;
  color: var(--text-sec);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 80px 20px 40px;
  margin-top: 100px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-col h4 {
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 20px;
  color: var(--text-pri);
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  color: var(--text-sec);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-col ul a:hover {
  color: var(--text-pri);
}

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

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

.btn-secondary:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* ── Hero Badge (Animated Liquid Silver Gradient) ────────────────────────── */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

/* Dark mode: bright silver shimmer */
.hero-badge-gradient {
  background: linear-gradient(
    90deg,
    #B0BAC8 0%,
    #F8FAFC 20%,
    #E2E8F0 40%,
    #C8D4E0 60%,
    #F8FAFC 80%,
    #B0BAC8 100%
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: silverShimmer 4s linear infinite;
}

/* Light mode: dark silver shimmer (readable on white) */
[data-theme="light"] .hero-badge-gradient {
  background: linear-gradient(
    90deg,
    #374151 0%,
    #111827 20%,
    #1F2937 40%,
    #4B5563 60%,
    #111827 80%,
    #374151 100%
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: silverShimmer 4s linear infinite;
}

@keyframes silverShimmer {
  0%   { background-position: 100% 50%; }
  100% { background-position:   0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-badge-gradient {
    animation: none;
  }
}

/* ── Section & Layout Components ─────────────────────────────────────────── */
.section {
  padding: 96px 0;
}

.section-hero {
  padding: 120px 0 80px;
  text-align: center;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}

.section-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1.08;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.5;
}

.hero-audience {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 20px;
}

/* ── Security Badges Grid ────────────────────────────────────────────────── */
.security-badges-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin: 36px 0;
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.security-badge i {
  color: var(--text-secondary);
}

/* ── Feature Cards Grid ─────────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  border-color: var(--border-active);
  transform: translateY(-4px);
  background: var(--bg-surface-elevated);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.feature-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Live Cryptographic Terminal ─────────────────────────────────────────── */
.terminal-card {
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  box-shadow: 0 24px 48px rgba(0,0,0,0.5);
  margin: 48px auto;
  max-width: 960px;
}

.terminal-header {
  background: #111118;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #2a2a38;
}

.terminal-title {
  font-size: 0.8rem;
  color: #94A3B8;
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 24px;
  font-size: 0.9rem;
  color: #E2E8F0;
  line-height: 1.7;
}

.terminal-line {
  margin-bottom: 8px;
}

.terminal-accent {
  color: #38BDF8;
}

.terminal-success {
  color: #4ADE80;
}

/* ── Comparison Table ────────────────────────────────────────────────────── */
.table-container {
  overflow-x: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin: 36px 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.95rem;
}

.comparison-table th {
  background: var(--bg-surface-elevated);
  font-weight: 700;
  color: var(--text-primary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* ── Accordion FAQ ───────────────────────────────────────────────────────── */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--border-active);
  background: var(--bg-surface-elevated);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 0.9rem;
  transition: transform 0.24s ease;
  color: var(--text-secondary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

/* ── Global Footer ───────────────────────────────────────────────────────── */
.global-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 340px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Footer Attribution Link — matches surrounding muted text, hovers to primary */
.footer-attribution-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.25s ease;
}

.footer-attribution-link:hover {
  color: var(--text-primary);
  text-decoration: none;
}

/* FAQ CTA link */
.faq-cta-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.faq-cta-link:hover {
  opacity: 0.8;
  transform: translateX(4px);
}

/* ── Responsive Queries (Mobile, Tablet, Desktop) ────────────────────────── */
@media (max-width: 1024px) {
  .nav-inner {
    padding: 0 18px;
  }
  .nav-links {
    gap: 18px;
  }
  .nav-links a {
    font-size: 0.85rem;
  }
  .footer-inner, .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 860px) {
  .app-preview-card {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 24px;
  }
  .hero-title {
    font-size: clamp(2.2rem, 6vw, 3.4rem);
    letter-spacing: -1.2px;
  }
  .section-title {
    font-size: 2.1rem;
  }
}

@media (max-width: 640px) {
  .nav-container {
    top: 12px;
    padding: 0 12px;
  }
  .nav-inner {
    height: 52px;
    padding: 0 12px;
    border-radius: 26px;
  }
  .brand-logo-img {
    height: 26px;
  }
  .brand-title {
    font-size: 0.95rem;
  }
  .nav-links {
    display: none;
  }
  .theme-toggle-btn {
    width: 34px;
    height: 34px;
    font-size: 0.85rem;
  }
  .nav-actions .btn-primary {
    padding: 8px 14px;
    font-size: 0.8rem;
    border-radius: 18px;
  }

  .hero {
    padding: 100px 14px 48px;
    min-height: auto;
  }
  .hero-badge {
    font-size: 0.75rem;
    padding: 6px 14px;
    margin-bottom: 18px;
  }
  .hero-title {
    font-size: clamp(1.85rem, 7.5vw, 2.6rem);
    letter-spacing: -0.8px;
    margin-bottom: 16px;
  }
  .hero-subtitle {
    font-size: 0.95rem;
    margin-bottom: 28px;
    line-height: 1.5;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    gap: 12px;
    margin-bottom: 36px;
  }
  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 0.9rem;
  }

  .app-preview-card {
    padding: 18px;
    border-radius: 20px;
  }
  .crypto-terminal {
    padding: 14px;
    font-size: 0.75rem;
    border-radius: 14px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .section {
    padding: 56px 14px;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .section-subtitle {
    font-size: 0.95rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .feature-card {
    padding: 24px;
    border-radius: 20px;
  }

  .matrix-table, .comparison-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  .footer-inner, .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
    font-size: 0.8rem;
  }
}

@media (max-width: 360px) {
  .brand-title {
    display: none;
  }
  .hero-title {
    font-size: 1.7rem;
  }
}

/* ── Mobile Nav Open State ───────────────────────────────────────────────── */
.nav-links.nav-open {
  display: flex !important;
  flex-direction: column;
  position: absolute;
  top: 74px;
  left: 20px;
  right: 20px;
  background: var(--bg-surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 24px 28px;
  border: 1px solid var(--border-active);
  border-radius: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  gap: 18px;
  z-index: 999;
  animation: slideDown 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ── Header Scroll Shadow ────────────────────────────────────────────────── */
.header-scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.18);
}
[data-theme="light"] .header-scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.08);
}

/* ── FAQ Page Styles (faq.ejs) ───────────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
}

.faq-list .faq-item {
  border-radius: 0;
  border: none;
  background: transparent;
}

/* .faq-q and .faq-a already defined in faq.ejs inline — consolidated here */
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: color 0.2s;
}

.faq-q i {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-q.open i {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  transition: max-height 0.38s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
}

.faq-a.open {
  max-height: 600px;
  padding-bottom: 20px;
}

/* ── Knowledgebase Page Styles ───────────────────────────────────────────── */
.kb-category {
  transition: opacity 0.2s ease;
}

.kb-article {
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.kb-article[style*="display: none"] {
  display: none !important;
}

.kb-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.kb-tag-security {
  background: rgba(74, 222, 128, 0.1);
  color: #4ade80;
  border-color: rgba(74, 222, 128, 0.2);
}

.kb-tag-account {
  background: rgba(96, 165, 250, 0.1);
  color: #60a5fa;
  border-color: rgba(96, 165, 250, 0.2);
}