/* ==========================================================================
   Twosome Chat — Static Landing Page Stylesheet
   Pure CSS, Dark Theme, Modern Slate & Accent Blue (#2563EB)
   ========================================================================== */

:root {
  --bg-primary: #0B0F17;
  --bg-surface: #0F172A;
  --bg-card: #1E293B;
  --bg-card-hover: #243248;
  --bg-elevated: #283548;
  
  --border-subtle: #1E293B;
  --border-card: #334155;
  --border-hover: #475569;
  
  --accent-blue: #2563EB;
  --accent-blue-hover: #1D4ED8;
  --accent-blue-light: #60A5FA;
  --accent-blue-glow: rgba(37, 99, 235, 0.22);
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --color-success: #10B981;
  --color-warning: #F59E0B;
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input {
  font-family: inherit;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo-img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.brand-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 9px;
  color: var(--accent-blue-light);
  box-shadow: 0 0 12px var(--accent-blue-glow);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--accent-blue-hover);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: 10px;
}

/* Mobile Hamburger Menu */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-card);
  padding: 8px;
  border-radius: 8px;
  color: var(--text-primary);
  cursor: pointer;
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--accent-blue);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-menu-drawer {
  display: none;
  flex-direction: column;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-card);
  padding: 24px;
  gap: 20px;
  z-index: 99;
}

.mobile-menu-drawer.is-open {
  display: flex;
}

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  padding-top: 64px;
  padding-bottom: 96px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 450px;
  background: radial-gradient(circle, var(--accent-blue-glow) 0%, rgba(11, 15, 23, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-blue-light);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-title span {
  background: linear-gradient(135deg, #F8FAFC 30%, var(--accent-blue-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-security-proof {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.proof-item {
  display: flex;
  align-items: flex-start;
  text-align: left;
  gap: 10px;
}

.proof-item svg {
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 3px;
  width: 18px;
  height: 18px;
}

.proof-item span {
  flex: 1;
  line-height: 1.45;
}

/* ==========================================================================
   CSS-Only Phone Mockup
   ========================================================================== */
.mockup-container {
  display: flex;
  justify-content: center;
  perspective: 1000px;
  width: 100%;
  max-width: 100%;
}

.phone-device {
  width: 100%;
  max-width: 340px;
  background-color: #0F172A;
  border-radius: 40px;
  border: 8px solid #1E293B;
  box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.7),
              0 0 40px -10px var(--accent-blue-glow),
              inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  overflow: hidden;
  position: relative;
  transition: transform var(--transition-normal);
  box-sizing: border-box;
}

.phone-device:hover {
  transform: translateY(-4px);
}

/* Notch / Dynamic Island */
.phone-notch-bar {
  display: flex;
  justify-content: center;
  padding-top: 10px;
  padding-bottom: 6px;
  background-color: #0F172A;
}

.phone-island {
  width: 90px;
  height: 20px;
  background-color: #020617;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  gap: 6px;
}

.island-camera {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #1E293B;
  border: 1px solid #334155;
}

/* Phone Screen Header */
.chat-app-header {
  padding: 12px 16px;
  background-color: #141E33;
  border-bottom: 1px solid #1E293B;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-partner-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.partner-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1E293B, #334155);
  border: 1.5px solid var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #F8FAFC;
  position: relative;
}

.partner-online-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--color-success);
  border: 2px solid #141E33;
}

.partner-details h4,
.partner-details .partner-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: #F8FAFC;
  line-height: 1.2;
}

.partner-details span {
  font-size: 0.72rem;
  color: var(--color-success);
  font-weight: 500;
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.header-action-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 4px;
}

/* Chat Messages Stream inside Mockup */
.chat-screen-body {
  padding: 16px 14px;
  background-color: #0B0F17;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 380px;
  font-size: 0.82rem;
}

.chat-e2ee-pill {
  align-self: center;
  background-color: #131D2E;
  border: 1px solid #1E293B;
  color: #94A3B8;
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 12px;
  text-align: center;
  display: flex;
  align-items: center;
  gap: 5px;
}

.bubble {
  max-width: 82%;
  padding: 9px 12px;
  border-radius: 14px;
  line-height: 1.4;
  position: relative;
}

.bubble-received {
  align-self: flex-start;
  background-color: #1E293B;
  color: #F1F5F9;
  border-bottom-left-radius: 4px;
}

.bubble-sent {
  align-self: flex-end;
  background-color: #2563EB;
  color: #FFFFFF;
  border-bottom-right-radius: 4px;
}

.bubble-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 3px;
}

.bubble-received .bubble-meta {
  color: #94A3B8;
}

.edited-tag {
  font-style: italic;
  font-size: 0.65rem;
  opacity: 0.85;
}

/* View-Once Photo Tile in Mockup */
.view-once-tile {
  background-color: #16243E;
  border: 1px dashed #3B82F6;
  border-radius: 10px;
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
}

.view-once-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(37, 99, 235, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60A5FA;
}

.view-once-label {
  font-weight: 600;
  font-size: 0.78rem;
  color: #E2E8F0;
}

.view-once-status {
  font-size: 0.68rem;
  color: #94A3B8;
}

/* Call Log System Bubble */
.chat-call-pill {
  align-self: center;
  background-color: #141F32;
  border: 1px solid #1E293B;
  color: #E2E8F0;
  padding: 5px 12px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 500;
}

.call-pill-icon {
  color: #38BDF8;
}

/* Phone Input Bar */
.chat-input-bar {
  padding: 10px 12px;
  background-color: #0F172A;
  border-top: 1px solid #1E293B;
  display: flex;
  align-items: center;
  gap: 8px;
}

.fake-input {
  flex: 1;
  background-color: #1E293B;
  color: #64748B;
  font-size: 0.78rem;
  padding: 8px 12px;
  border-radius: 20px;
  border: 1px solid #334155;
}

.fake-send-btn {
  width: 32px;
  height: 32px;
  background-color: var(--accent-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* ==========================================================================
   Section Headers & Shared Section Styles
   ========================================================================== */
section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Features Grid
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 24px;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card);
  transform: translateY(-2px);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue-light);
  margin-bottom: 20px;
}

.feature-card:hover .feature-icon-wrapper {
  background-color: var(--accent-blue);
  color: #FFFFFF;
  border-color: var(--accent-blue);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Highlighted featured card spanning across */
.feature-card.highlight {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #131E33 0%, var(--bg-surface) 100%);
  border-color: #2E4570;
}

/* ==========================================================================
   How It Works (3 Steps)
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.step-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.step-number {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent-blue);
  color: var(--accent-blue-light);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 0 14px var(--accent-blue-glow);
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Privacy Section (Honest & Specific)
   ========================================================================== */
.privacy-section {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.privacy-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.privacy-points {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.privacy-point {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.privacy-point-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.privacy-point-content h3,
.privacy-point-content h4 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.privacy-point-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Realistic Honest Disclaimer Box */
.honest-disclaimer-box {
  background-color: #141B26;
  border: 1px solid #334155;
  border-left: 4px solid var(--accent-blue-light);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-top: 16px;
}

.disclaimer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #F8FAFC;
  margin-bottom: 8px;
}

.disclaimer-quote {
  font-size: 0.95rem;
  font-style: italic;
  color: #CBD5E1;
  line-height: 1.6;
}

/* Privacy Technical Card */
.privacy-tech-card {
  background: #0B0F17;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.tech-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.tech-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tech-card-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background-color: #132438;
  color: #38BDF8;
  border: 1px solid #1E3A5F;
}

.tech-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
  font-size: 0.9rem;
}

.tech-row:last-child {
  border-bottom: none;
}

.tech-label {
  color: var(--text-secondary);
}

.tech-value {
  font-weight: 600;
  color: #F8FAFC;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tech-value.secure {
  color: var(--color-success);
}

/* ==========================================================================
   Coming Soon Section
   ========================================================================== */
.coming-soon-card {
  background: linear-gradient(135deg, #111827 0%, #0F172A 100%);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  overflow: hidden;
}

.platform-badges {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.platform-badge span {
  font-size: 0.78rem;
  color: var(--accent-blue-light);
  display: block;
  font-weight: 500;
}

.waitlist-form {
  display: flex;
  max-width: 460px;
  margin: 0 auto;
  gap: 10px;
}

.waitlist-input {
  flex: 1;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.waitlist-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px var(--accent-blue-glow);
}

.waitlist-status {
  margin-top: 14px;
  font-size: 0.88rem;
  min-height: 22px;
}

.waitlist-status.success {
  color: var(--color-success);
}

.waitlist-status.error {
  color: #EF4444;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item[open] {
  border-color: var(--border-hover);
  background-color: var(--bg-card);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
  list-style: none; /* remove native triangle */
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--accent-blue-light);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-answer p + p {
  margin-top: 12px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #070B11;
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 36px 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

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

.footer-brand h3 {
  color: var(--text-primary);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.footer-brand p {
  max-width: 360px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.footer-col h3,
.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Legal Pages (Privacy & Terms)
   ========================================================================== */
.legal-page {
  padding-top: 48px;
  padding-bottom: 96px;
}

.legal-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 24px;
}

.legal-notice-banner {
  background-color: #1E2838;
  border: 1px solid #3B82F6;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.88rem;
  color: #93C5FD;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.legal-content {
  max-width: 800px;
  color: #CBD5E1;
  font-size: 0.98rem;
  line-height: 1.7;
}

.legal-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 14px;
  letter-spacing: -0.015em;
}

.legal-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 24px;
  margin-bottom: 10px;
}

.legal-content p, .legal-content ul {
  margin-bottom: 16px;
}

.legal-content ul {
  padding-left: 24px;
}

.legal-content li {
  margin-bottom: 8px;
}

/* ==========================================================================
   Scroll Fade-In Animations
   ========================================================================== */
.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-in-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content {
    align-items: center;
  }

  .hero-title {
    font-size: 2.6rem;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-security-proof {
    width: 100%;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
    align-items: flex-start;
    text-align: left;
  }

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

  .privacy-layout {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  /* Header mobile tuning */
  .site-header {
    height: 60px;
  }

  .header-inner {
    gap: 8px;
  }

  .brand-logo {
    font-size: 1.05rem;
    gap: 8px;
    white-space: nowrap;
  }

  .brand-logo-img {
    width: 30px;
    height: 30px;
    border-radius: 8px;
  }

  .brand-icon {
    width: 30px;
    height: 30px;
    border-radius: 8px;
  }

  .brand-icon svg {
    width: 17px;
    height: 17px;
  }

  .nav-desktop {
    display: none;
  }

  .nav-actions {
    gap: 8px;
    flex-shrink: 0;
  }

  .site-header .open-app-btn {
    padding: 6px 12px;
    font-size: 0.82rem;
    height: 36px;
    min-height: 36px;
    line-height: 1;
    white-space: nowrap;
    border-radius: 6px;
    box-shadow: none;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    width: 36px;
    height: 36px;
    border-radius: 6px;
  }

  .menu-toggle svg {
    width: 20px;
    height: 20px;
  }

  .mobile-menu-drawer {
    top: 60px;
    padding: 18px 16px;
    gap: 12px;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }

  .mobile-nav-link {
    min-height: 48px;
    display: flex;
    align-items: center;
    font-size: 1.02rem;
    padding: 6px 0;
  }

  .mobile-menu-drawer .open-app-btn {
    height: 44px;
    min-height: 44px;
    font-size: 0.95rem;
    margin-top: 6px;
  }

  /* Section Spacing on Mobile */
  section {
    padding-top: 52px;
    padding-bottom: 52px;
  }

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

  .hero-glow {
    width: 100%;
    max-width: 100vw;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .section-tag {
    font-size: 0.75rem;
    margin-bottom: 8px;
  }

  .section-title {
    font-size: clamp(1.45rem, 5.5vw, 1.85rem);
    line-height: 1.25;
    margin-bottom: 12px;
  }

  .section-desc {
    font-size: 0.95rem;
    line-height: 1.55;
  }

  /* Hero Elements on Mobile */
  .hero-badge {
    font-size: 0.78rem;
    padding: 5px 12px;
    margin-bottom: 18px;
    max-width: 100%;
    line-height: 1.35;
    white-space: normal;
    text-align: center;
  }

  .hero-title {
    font-size: clamp(1.75rem, 7.5vw, 2.125rem); /* Clamped ~28px - 34px */
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin-bottom: 16px;
  }

  .hero-subtitle {
    font-size: 0.98rem; /* 15-16px */
    line-height: 1.55;
    margin-bottom: 24px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-bottom: 28px;
  }

  .hero-cta-group .btn {
    width: 100%;
    height: 44px;
    min-height: 44px;
    padding: 0 16px;
    font-size: 0.95rem;
    border-radius: 8px;
  }

  /* Checklist rows under hero */
  .hero-security-proof {
    width: 100%;
    max-width: 380px;
    align-items: flex-start;
    text-align: left;
    gap: 10px;
    margin-left: auto;
    margin-right: auto;
  }

  .proof-item {
    width: 100%;
    align-items: flex-start;
    text-align: left;
    gap: 10px;
  }

  .proof-item svg {
    width: 16px;
    height: 16px;
    margin-top: 3px;
    flex-shrink: 0;
  }

  .proof-item span {
    font-size: 0.85rem;
    line-height: 1.45;
    color: var(--text-secondary);
    flex: 1;
  }

  /* Phone Mockup Mobile */
  .mockup-container {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
  }

  .phone-device {
    width: 100%;
    max-width: 320px;
    border-width: 6px;
    border-radius: 30px;
  }

  /* Feature cards on mobile */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feature-card {
    padding: 20px 16px;
    border-radius: 12px;
    min-width: 0;
  }

  .feature-icon-wrapper {
    width: 38px;
    height: 38px;
    border-radius: 9px;
    margin-bottom: 12px;
  }

  .feature-icon-wrapper svg {
    width: 20px;
    height: 20px;
  }

  .feature-title {
    font-size: 1.08rem;
    margin-bottom: 6px;
  }

  .feature-text {
    font-size: 0.92rem;
    line-height: 1.5;
  }

  /* Steps on mobile */
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .step-card {
    padding: 20px 16px;
    border-radius: 12px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 1rem;
    margin-bottom: 12px;
  }

  .step-title {
    font-size: 1.15rem;
    margin-bottom: 8px;
  }

  .step-desc {
    font-size: 0.92rem;
    line-height: 1.5;
  }

  /* Privacy on mobile */
  .privacy-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .privacy-points {
    gap: 18px;
  }

  .privacy-point {
    gap: 12px;
  }

  .privacy-point-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    margin-top: 2px;
  }

  .privacy-point-icon svg {
    width: 18px;
    height: 18px;
  }

  .privacy-point-content h3,
  .privacy-point-content h4 {
    font-size: 1rem;
    margin-bottom: 4px;
  }

  .privacy-point-content p {
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .honest-disclaimer-box {
    padding: 16px 14px;
    border-radius: 10px;
    margin-top: 12px;
  }

  .disclaimer-header {
    font-size: 0.88rem;
    gap: 8px;
  }

  .disclaimer-quote {
    font-size: 0.88rem;
    line-height: 1.5;
  }

  .privacy-tech-card {
    padding: 20px 16px;
    border-radius: 14px;
  }

  .tech-card-header {
    padding-bottom: 12px;
    margin-bottom: 12px;
  }

  .tech-card-title {
    font-size: 0.95rem;
  }

  .tech-card-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
  }

  .tech-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    padding: 8px 0;
    font-size: 0.85rem;
  }

  .tech-label {
    font-size: 0.8rem;
  }

  .tech-value {
    font-size: 0.85rem;
    word-break: break-word;
  }

  /* Coming soon on mobile */
  .coming-soon-card {
    padding: 28px 16px;
    border-radius: 14px;
  }

  .coming-soon-card .section-title {
    font-size: 1.45rem;
  }

  .coming-soon-card .section-desc {
    font-size: 0.92rem;
    margin-bottom: 20px !important;
  }

  .platform-badges {
    flex-direction: column;
    gap: 10px;
    width: 100%;
    margin-bottom: 24px;
  }

  .platform-badge {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    padding: 10px 16px;
    border-radius: 10px;
  }

  .waitlist-form {
    flex-direction: column;
    width: 100%;
    gap: 10px;
  }

  .waitlist-input {
    height: 48px;
    min-height: 48px;
    font-size: 16px; /* Prevents auto-zoom in Safari iOS */
    padding: 0 16px;
    width: 100%;
    border-radius: 8px;
  }

  .waitlist-form .btn {
    height: 48px;
    min-height: 48px;
    width: 100%;
    font-size: 1rem;
    border-radius: 8px;
  }

  /* FAQ Accordion on mobile */
  .faq-item {
    border-radius: 10px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 0.95rem;
    min-height: 48px;
    gap: 10px;
  }

  .faq-chevron {
    width: 18px;
    height: 18px;
  }

  .faq-answer {
    padding: 0 16px 16px 16px;
    font-size: 0.9rem;
    line-height: 1.55;
  }

  /* Footer on mobile */
  .site-footer {
    padding: 40px 0 24px 0;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 28px;
  }

  .footer-brand p {
    font-size: 0.88rem;
  }

  .footer-col h3,
  .footer-col h4 {
    font-size: 0.92rem;
    margin-bottom: 10px;
  }

  .footer-links {
    gap: 2px;
  }

  .footer-links li {
    display: flex;
  }

  .footer-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 4px 0;
    font-size: 0.92rem;
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 18px;
    font-size: 0.8rem;
  }

  /* Legal pages on mobile */
  .legal-page {
    padding-top: 28px;
    padding-bottom: 48px;
  }

  .legal-header {
    margin-bottom: 20px;
    padding-bottom: 14px;
  }

  .legal-notice-banner {
    padding: 12px 14px;
    font-size: 0.82rem;
    gap: 8px;
  }

  .legal-content {
    font-size: 0.92rem;
    line-height: 1.6;
  }

  .legal-content h2 {
    font-size: 1.25rem;
    margin-top: 24px;
    margin-bottom: 8px;
  }

  .legal-content h3 {
    font-size: 1.05rem;
    margin-top: 18px;
    margin-bottom: 6px;
  }

  .legal-content code {
    word-break: break-word;
    font-size: 0.85em;
  }
}

/* ==========================================================================
   Small Mobile Devices (e.g. 375px - 414px)
   ========================================================================== */
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .phone-device {
    max-width: 295px;
  }
}

/* ==========================================================================
   Extra Small Mobile Devices (e.g. 320px)
   ========================================================================== */
@media (max-width: 360px) {
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  /* Header compacting for 320px */
  .brand-logo {
    font-size: 0.9rem;
    gap: 6px;
  }

  .brand-logo-img {
    width: 26px;
    height: 26px;
    border-radius: 6px;
  }

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

  .brand-icon svg {
    width: 15px;
    height: 15px;
  }

  .site-header .open-app-btn {
    padding: 5px 8px;
    font-size: 0.74rem;
    height: 32px;
    min-height: 32px;
  }

  .menu-toggle {
    width: 32px;
    height: 32px;
    padding: 5px;
  }

  .menu-toggle svg {
    width: 17px;
    height: 17px;
  }

  /* Phone Mockup at 320px */
  .phone-device {
    max-width: 100%;
    border-width: 5px;
    border-radius: 22px;
  }

  .phone-island {
    width: 68px;
    height: 15px;
  }

  .chat-app-header {
    padding: 8px 8px;
  }

  .partner-avatar {
    width: 26px;
    height: 26px;
    font-size: 0.7rem;
  }

  .partner-details h4,
  .partner-details .partner-name {
    font-size: 0.78rem;
  }

  .partner-details span {
    font-size: 0.62rem;
  }

  .chat-screen-body {
    padding: 8px 6px;
    gap: 6px;
    min-height: 270px;
    font-size: 0.72rem;
  }

  .chat-e2ee-pill {
    font-size: 0.6rem;
    padding: 2px 4px;
  }

  .bubble {
    max-width: 92%;
    padding: 6px 8px;
    font-size: 0.72rem;
    border-radius: 10px;
  }

  .bubble-meta {
    font-size: 0.6rem;
  }

  .view-once-tile {
    padding: 5px 6px;
    gap: 6px;
  }

  .view-once-icon {
    width: 20px;
    height: 20px;
  }

  .view-once-icon svg {
    width: 12px;
    height: 12px;
  }

  .view-once-label {
    font-size: 0.68rem;
  }

  .view-once-status {
    font-size: 0.58rem;
  }

  .chat-call-pill {
    font-size: 0.62rem;
    padding: 3px 6px;
  }

  .chat-input-bar {
    padding: 6px 6px;
    gap: 4px;
  }

  .fake-input {
    font-size: 0.68rem;
    padding: 5px 8px;
  }

  .fake-send-btn {
    width: 24px;
    height: 24px;
  }

  .fake-send-btn svg {
    width: 11px;
    height: 11px;
  }
}

/* ==========================================================================
   Prefers-Reduced-Motion Accessibility
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  .phone-device:hover {
    transform: none !important;
  }
}