/* ==========================================================================
   Surfshark Design System Implementation for DmitriyVPN
   Theme: Light mode consumer-SaaS by default with Dark mode toggle
   Tokens & specifications as defined in DESIGN.md
   ========================================================================== */

:root {
  /* Colors */
  --color-surfshark-teal: #1ebfbf;
  --color-coral-pulse: #fa3556;
  --color-promo-gold: #ffc200;
  --color-charcoal-ink: #16191c;
  --color-pure-white: #ffffff;
  --color-fog-white: #f9f9f9;
  --color-tide-tint: #e8f7f8;
  --color-ash-gray: #dadadd;
  --color-mist-gray: #bfbfc0;
  --color-slate: #5b6065;
  --color-graphite: #393e41;
  --color-carbon: #000000;
  --color-deep-abyss: #1e2327;

  /* Typography — Font Families (Inter exclusively) */
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Typography — Scale */
  --text-caption: 12px;
  --leading-caption: 1.5;
  --tracking-caption: 0.17px;
  --text-body-sm: 14px;
  --leading-body-sm: 1.71;
  --tracking-body-sm: 0.24px;
  --text-body: 16px;
  --leading-body: 1.75;
  --text-subheading: 18px;
  --leading-subheading: 1.67;
  --text-heading-sm: 24px;
  --leading-heading-sm: 1.33;
  --text-heading: 32px;
  --leading-heading: 1.3;
  --text-heading-lg: 40px;
  --leading-heading-lg: 1.21;
  --text-display: 60px;
  --leading-display: 1.07;
  --tracking-display: -1.5px;

  /* Typography — Weights */
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-unit: 4px;
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-64: 64px;
  --spacing-96: 96px;
  --spacing-200: 200px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 64px;
  --card-padding: 32px;
  --element-gap: 8px;

  /* Border Radius */
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-3xl: 32px;
  --radius-full: 48px;
  --radius-full-2: 64px;
  --radius-full-3: 96px;

  /* Named Radii */
  --radius-cards: 48px;
  --radius-links: 8px;
  --radius-pills: 96px;
  --radius-small: 8px;
  --radius-buttons: 12px;

  /* Surfaces (Default: Light) */
  --surface-canvas: #f9f9f9;
  --surface-card: #ffffff;
  --surface-tinted-wash: #e8f7f8;
  --surface-dark-panel: #16191c;
  --surface-deep-abyss: #1e2327;
}

/* ==========================================================================
   Dark Theme Overrides
   ========================================================================== */
[data-theme="dark"] {
  --surface-canvas: #0c0e12;
  --surface-card: #15181d;
  --surface-tinted-wash: #121c22;
  --surface-dark-panel: #101317;
  --surface-deep-abyss: #0a0c0f;

  --color-charcoal-ink: #f3f4f6;
  --color-fog-white: #15181d;
  --color-ash-gray: #242931;
  --color-mist-gray: #545c68;
  --color-slate: #9ca3af;
  --color-graphite: #323842;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-inter);
  background-color: var(--surface-canvas);
  color: var(--color-charcoal-ink);
  line-height: var(--leading-body);
  font-size: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Base Container */
.container {
  width: 100%;
  max-width: var(--page-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-24);
  padding-right: var(--spacing-24);
}

/* Links & Typography reset */
a {
  color: inherit;
  text-decoration: none;
}

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

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

/* Text accents */
.text-teal {
  color: var(--color-surfshark-teal);
}

.text-muted {
  color: var(--color-slate);
}

/* ==========================================================================
   Promo Banner
   Full-width 40px tall bar with #ffc200 background, centered 14px Inter 400 black
   ========================================================================== */
.promo-banner {
  background-color: var(--color-promo-gold);
  color: var(--color-carbon);
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--tracking-body-sm);
  line-height: 1.4;
  padding: 8px 16px;
  position: relative;
  z-index: 1002;
}

.promo-banner strong {
  font-weight: var(--font-weight-bold);
}

.promo-banner a {
  text-decoration: underline;
  margin-left: var(--spacing-8);
  font-weight: var(--font-weight-semibold);
  transition: opacity 0.2s ease;
}

.promo-banner a:hover {
  opacity: 0.8;
}

/* ==========================================================================
   Primary Navigation (Sticky, 64px height, Pure White, hairline border)
   ========================================================================== */
.header-nav {
  height: 64px;
  background-color: var(--surface-card);
  border-bottom: 1px solid var(--color-ash-gray);
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-charcoal-ink);
  letter-spacing: -0.5px;
  user-select: none;
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-surfshark-teal);
  flex-shrink: 0;
}

.brand-name {
  display: inline-flex;
  align-items: baseline;
  letter-spacing: -0.4px;
}

.brand-name span {
  color: var(--color-surfshark-teal);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-32);
}

nav.main-nav a {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-slate);
  transition: color 0.2s ease;
  padding: 6px 0;
  position: relative;
}

nav.main-nav a:hover {
  color: var(--color-charcoal-ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-buttons);
  border: 1px solid var(--color-ash-gray);
  background-color: var(--surface-card);
  color: var(--color-charcoal-ink);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  border-color: var(--color-surfshark-teal);
  color: var(--color-surfshark-teal);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

/* Default Light Theme: show Moon icon */
.theme-icon.sun-icon {
  display: none;
}
.theme-icon.moon-icon {
  display: block;
}

/* Dark Theme: show Sun icon */
[data-theme="dark"] .theme-icon.sun-icon {
  display: block;
}
[data-theme="dark"] .theme-icon.moon-icon {
  display: none;
}

/* Secondary Action / Dark Button */
.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-charcoal-ink);
  color: var(--color-pure-white);
  border-radius: var(--radius-buttons);
  padding: 12px 20px;
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-semibold);
  transition: background-color 0.2s ease, opacity 0.2s ease;
  white-space: nowrap;
}

[data-theme="dark"] .btn-dark {
  background-color: #242a33;
  color: var(--color-pure-white);
  border: 1px solid var(--color-graphite);
}

.btn-dark:hover {
  opacity: 0.9;
}

/* Burger Button for Mobile */
.burger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  cursor: pointer;
  z-index: 1001;
}

.burger-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-charcoal-ink);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.burger-btn.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger-btn.open span:nth-child(2) {
  opacity: 0;
}

.burger-btn.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 64px 0 0 0;
  background-color: var(--surface-card);
  z-index: 999;
  padding: 32px 24px;
  flex-direction: column;
  gap: 20px;
  border-top: 1px solid var(--color-ash-gray);
  overflow-y: auto;
}

.mobile-nav-overlay.open {
  display: flex;
}

.mobile-nav-overlay a {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-semibold);
  color: var(--color-charcoal-ink);
  padding: 10px 0;
  border-bottom: 1px solid var(--color-ash-gray);
}

.mobile-theme-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  font-size: var(--text-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-charcoal-ink);
  border-bottom: 1px solid var(--color-ash-gray);
}

.mobile-nav-overlay .btn-dark {
  margin-top: 12px;
  padding: 14px 24px;
  font-size: var(--text-body);
}

/* ==========================================================================
   Buttons System (Strictly as specified in DESIGN.md)
   ========================================================================== */

/* Coral Filled Button: Sole primary conversion action. 1 per viewport! */
.btn-coral {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-coral-pulse);
  color: var(--color-pure-white);
  border-radius: var(--radius-buttons);
  padding: 16px 28px;
  font-size: var(--text-body);
  font-weight: var(--font-weight-semibold);
  transition: opacity 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}

.btn-coral:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

/* Dark Pill Button */
.btn-pill-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-charcoal-ink);
  color: var(--color-pure-white);
  border-radius: var(--radius-pills);
  padding: 12px 24px;
  font-size: var(--text-body);
  font-weight: var(--font-weight-semibold);
  transition: opacity 0.2s ease, transform 0.15s ease;
}

[data-theme="dark"] .btn-pill-dark {
  background-color: #242a33;
  border: 1px solid var(--color-graphite);
}

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

/* Text link with trailing arrow */
.text-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-pure-white);
  transition: gap 0.2s ease, opacity 0.2s ease;
}

.text-link-arrow:hover {
  gap: 12px;
  opacity: 0.9;
}

.text-link-arrow.dark-text {
  color: var(--color-charcoal-ink);
}

/* ==========================================================================
   Pill Tag / Rating Badges
   ========================================================================== */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-pills);
  padding: 6px 14px;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
}

.pill-badge.dark-mode {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-graphite);
  color: var(--color-surfshark-teal);
}

.pill-badge.light-mode {
  background-color: var(--surface-card);
  border: 1px solid var(--color-ash-gray);
  color: var(--color-charcoal-ink);
  text-transform: none;
  font-size: var(--text-body-sm);
  padding: 8px 18px;
}

/* ==========================================================================
   Section Rhythm & General Typography
   ========================================================================== */
.section-wrapper {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px auto;
}

.section-title {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-heading);
  color: var(--color-charcoal-ink);
  margin-bottom: var(--spacing-12);
}

.section-sub {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-slate);
}

/* ==========================================================================
   Hero Card (Dark)
   #16191c background with 64px border-radius, full width up to 1200px max.
   Generous bottom padding (80px) to give the CTA buttons ample room from the 64px corner.
   ========================================================================== */
.hero-card-dark {
  background-color: var(--surface-dark-panel);
  border-radius: var(--radius-full-2);
  padding: 64px 60px 84px 60px; /* Generous bottom padding to fix corner cutoff */
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: var(--spacing-48);
  color: var(--color-pure-white);
  position: relative;
  overflow: hidden;
  margin-top: var(--spacing-32);
  border: 1px solid var(--color-graphite);
}

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

.hero-headline {
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  color: var(--color-pure-white);
  margin-top: var(--spacing-16);
  margin-bottom: var(--spacing-20);
}

.hero-description {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-mist-gray);
  margin-bottom: var(--spacing-24);
  max-width: 540px;
}

/* Checkmark Feature List */
.checkmark-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-32);
  width: 100%;
}

.checkmark-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-12);
  font-size: var(--text-body);
  line-height: 1.5;
  color: var(--color-pure-white);
}

.checkmark-item.dark-text {
  color: var(--color-charcoal-ink);
}

.checkmark-icon {
  width: 18px;
  height: 18px;
  color: var(--color-surfshark-teal);
  flex-shrink: 0;
  margin-top: 3px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-24);
  flex-wrap: wrap;
}

/* Hero Right Visual Column */
.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual-card {
  width: 100%;
  max-width: 440px;
  background-color: var(--surface-deep-abyss);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-3xl);
  padding: var(--spacing-32);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-24);
}

.visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-graphite);
  padding-bottom: var(--spacing-16);
}

.visual-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-caption);
  color: var(--color-surfshark-teal);
  font-weight: var(--font-weight-semibold);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-surfshark-teal);
}

.visual-protocol {
  font-size: var(--text-caption);
  color: var(--color-mist-gray);
  font-weight: var(--font-weight-semibold);
}

.visual-main-shield {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16) 0;
  text-align: center;
}

.shield-svg-wrap {
  width: 96px;
  height: 96px;
  margin-bottom: var(--spacing-16);
  color: var(--color-surfshark-teal);
}

.visual-shield-title {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  margin-bottom: 4px;
}

.visual-shield-sub {
  font-size: var(--text-body-sm);
  color: var(--color-mist-gray);
}

.visual-metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
}

.metric-box {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-xl);
  padding: 12px 14px;
}

.metric-label {
  font-size: var(--text-caption);
  color: var(--color-mist-gray);
  margin-bottom: 4px;
}

.metric-value {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
}

/* ==========================================================================
   Reviewer Avatar Strip & Trust Bar
   ========================================================================== */
.social-proof-strip {
  padding-top: var(--spacing-48);
  padding-bottom: var(--spacing-48);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-16);
}

.avatar-stack {
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 3px solid var(--surface-canvas);
  margin-left: -12px;
  background-color: var(--color-ash-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  overflow: hidden;
  user-select: none;
}

.avatar-circle:first-child {
  margin-left: 0;
}

.avatar-circle.c1 { background: #3b82f6; }
.avatar-circle.c2 { background: #1ebfbf; }
.avatar-circle.c3 { background: #8b5cf6; }
.avatar-circle.c4 { background: #fa3556; }
.avatar-circle.c5 { background: #10b981; }

.stars-gold {
  color: #ffb800;
  letter-spacing: 2px;
}

.social-proof-caption {
  font-size: var(--text-body-sm);
  color: var(--color-slate);
}

/* ==========================================================================
   Feature Cards (Light)
   #ffffff background, 48px border-radius, 32px padding, no shadow, 1px #dadadd border
   ========================================================================== */
.grid-features-light {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-24);
}

.feature-card-light {
  background-color: var(--surface-card);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  border: 1px solid var(--color-ash-gray);
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, background-color 0.25s ease;
}

.feature-card-light:hover {
  border-color: var(--color-surfshark-teal);
}

.feature-icon-badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-2xl);
  background-color: var(--surface-tinted-wash);
  color: var(--color-surfshark-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-24);
  flex-shrink: 0;
}

.feature-icon-badge svg {
  width: 28px;
  height: 28px;
}

.feature-title-light {
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-charcoal-ink);
  line-height: var(--leading-heading-sm);
  margin-bottom: var(--spacing-12);
}

.feature-desc-light {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-slate);
}

/* ==========================================================================
   Supported Devices Section (Tide Tint surface wash)
   ========================================================================== */
.devices-container {
  background-color: var(--surface-tinted-wash);
  border-radius: var(--radius-cards);
  padding: 48px 36px;
  border: 1px solid var(--color-ash-gray);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.grid-devices-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-16);
  margin-top: var(--spacing-32);
}

.device-item-card {
  background-color: var(--surface-card);
  border-radius: var(--radius-2xl);
  padding: 24px 16px;
  border: 1px solid var(--color-ash-gray);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: border-color 0.2s ease, transform 0.15s ease, background-color 0.25s ease;
}

.device-item-card:hover {
  border-color: var(--color-surfshark-teal);
  transform: translateY(-2px);
}

.device-icon-wrap {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-12);
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-icon-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.device-title {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-charcoal-ink);
  margin-bottom: 4px;
}

.device-badge-app {
  font-size: var(--text-caption);
  color: var(--color-slate);
}

/* ==========================================================================
   Feature Card (Dark) — How to Connect Section
   ========================================================================== */
.feature-panel-dark {
  background-color: var(--surface-dark-panel);
  border-radius: var(--radius-cards);
  padding: 56px 48px;
  color: var(--color-pure-white);
  border: 1px solid var(--color-graphite);
}

.panel-header-dark {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px auto;
}

.panel-title-dark {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-12);
}

.panel-sub-dark {
  font-size: var(--text-body);
  color: var(--color-mist-gray);
}

.grid-steps-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
}

.step-card-dark {
  background-color: var(--surface-deep-abyss);
  border-radius: var(--radius-3xl);
  padding: var(--card-padding);
  border: 1px solid var(--color-graphite);
  display: flex;
  flex-direction: column;
}

.step-num-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--color-surfshark-teal);
  color: var(--color-surfshark-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-20);
}

.step-title-dark {
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-12);
}

.step-desc-dark {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-mist-gray);
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing-section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

.billing-toggle-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 48px;
}

.billing-toggle-pill {
  display: inline-flex;
  align-items: center;
  background-color: var(--surface-card);
  border: 1px solid var(--color-ash-gray);
  border-radius: var(--radius-pills);
  padding: 4px;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.billing-opt-btn {
  border-radius: var(--radius-pills);
  padding: 10px 24px;
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-slate);
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
}

.billing-opt-btn.active {
  background-color: var(--color-charcoal-ink);
  color: var(--color-pure-white);
}

[data-theme="dark"] .billing-opt-btn.active {
  background-color: #242a33;
  color: var(--color-pure-white);
}

.promo-discount-badge {
  background-color: var(--color-promo-gold);
  color: var(--color-carbon);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-bold);
  padding: 2px 8px;
  border-radius: var(--radius-links);
  line-height: 1.2;
}

.grid-pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
  align-items: stretch;
}

.pricing-card {
  background-color: var(--surface-card);
  border-radius: var(--radius-cards);
  padding: 40px 32px;
  border: 1px solid var(--color-ash-gray);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

/* Featured card in pricing */
.pricing-card.featured-plan {
  border: 2px solid var(--color-surfshark-teal);
  background-color: var(--surface-card);
}

.pricing-card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-surfshark-teal);
  color: var(--color-charcoal-ink);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-bold);
  padding: 4px 18px;
  border-radius: var(--radius-pills);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

[data-theme="dark"] .pricing-card-badge {
  color: #0c0e12;
}

.pricing-plan-name {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-bold);
  color: var(--color-charcoal-ink);
  margin-bottom: var(--spacing-8);
}

.pricing-plan-price {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-charcoal-ink);
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: var(--spacing-24);
}

.pricing-plan-price span.term {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-regular);
  color: var(--color-slate);
}

.price-val {
  transition: opacity 0.15s ease;
}

.price-val.updating {
  opacity: 0;
}

/* Sub-plan tier chips */
.sub-plan-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-24);
  padding: 12px;
  background-color: var(--surface-canvas);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-ash-gray);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.sub-plan-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-body-sm);
  color: var(--color-charcoal-ink);
}

.sub-plan-row span {
  color: var(--color-slate);
}

.sub-plan-row strong {
  font-weight: var(--font-weight-bold);
}

/* Pricing features checkmarks */
.pricing-features-list {
  list-style: none;
  margin-bottom: var(--spacing-32);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.pricing-features-list li {
  font-size: var(--text-body-sm);
  line-height: 1.5;
  color: var(--color-charcoal-ink);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.pricing-features-list li.disabled-feature {
  color: var(--color-mist-gray);
  text-decoration: line-through;
}

.pricing-check-icon {
  width: 16px;
  height: 16px;
  color: var(--color-surfshark-teal);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-cross-icon {
  width: 16px;
  height: 16px;
  color: var(--color-mist-gray);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-card .btn-coral,
.pricing-card .btn-dark {
  width: 100%;
  margin-top: auto;
}

/* ==========================================================================
   FAQ Accordion List
   ========================================================================== */
.faq-section-wrapper {
  max-width: 840px;
  margin: 0 auto;
}

.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.faq-item {
  background-color: var(--surface-card);
  border: 1px solid var(--color-ash-gray);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: border-color 0.2s ease, background-color 0.25s ease;
}

.faq-item.open {
  border-color: var(--color-surfshark-teal);
}

.faq-question-btn {
  width: 100%;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-16);
  text-align: left;
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-semibold);
  color: var(--color-charcoal-ink);
  cursor: pointer;
  background: transparent;
}

.faq-toggle-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--surface-tinted-wash);
  color: var(--color-surfshark-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-toggle-icon svg {
  width: 16px;
  height: 16px;
}

.faq-item.open .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer-collapse {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-content {
  padding: 0 24px 24px 24px;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-slate);
}

/* ==========================================================================
   Testimonial Block & Review Strip
   ========================================================================== */
.testimonial-block-hero {
  background-color: var(--surface-card);
  border-radius: var(--radius-cards);
  border: 1px solid var(--color-ash-gray);
  padding: 56px 48px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--spacing-48);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.testimonial-quote {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-heading);
  color: var(--color-charcoal-ink);
  max-width: 820px;
  margin-bottom: var(--spacing-24);
}

.testimonial-author {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-charcoal-ink);
  margin-bottom: 4px;
}

.testimonial-subinfo {
  font-size: var(--text-body-sm);
  color: var(--color-slate);
  margin-bottom: var(--spacing-32);
}

.grid-reviews-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-24);
}

.review-item-card {
  background-color: var(--surface-card);
  border: 1px solid var(--color-ash-gray);
  border-radius: var(--radius-3xl);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.review-card-top {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
}

.review-avatar-box {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-charcoal-ink);
  color: var(--color-pure-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--text-subheading);
  flex-shrink: 0;
}

[data-theme="dark"] .review-avatar-box {
  background-color: #242a33;
}

.review-user-name {
  font-weight: var(--font-weight-bold);
  font-size: var(--text-body);
  color: var(--color-charcoal-ink);
}

.review-verified-badge {
  font-size: var(--text-caption);
  color: #10b981;
  font-weight: var(--font-weight-semibold);
}

.review-quote-text {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-slate);
}

/* ==========================================================================
   Support CTA Panel (Dark Panel)
   ========================================================================== */
.support-panel-dark {
  background-color: var(--surface-dark-panel);
  border-radius: var(--radius-cards);
  padding: 56px 48px;
  color: var(--color-pure-white);
  border: 1px solid var(--color-graphite);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.support-title {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-16);
  max-width: 680px;
}

.support-desc {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-mist-gray);
  max-width: 580px;
  margin-bottom: var(--spacing-32);
}

/* ==========================================================================
   Site-Wide Footer
   ========================================================================== */
.site-footer {
  background-color: var(--surface-dark-panel);
  color: var(--color-pure-white);
  padding-top: var(--spacing-48);
  padding-bottom: var(--spacing-48);
  border-top: 1px solid var(--color-graphite);
  margin-top: var(--section-gap);
}

.footer-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--spacing-32);
  border-bottom: 1px solid var(--color-graphite);
  margin-bottom: var(--spacing-40);
  flex-wrap: wrap;
  gap: var(--spacing-20);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
}

.footer-logo .brand-name {
  color: var(--color-pure-white);
}

.footer-logo .brand-name span {
  color: var(--color-surfshark-teal);
}

.footer-tagline {
  font-size: var(--text-body-sm);
  color: var(--color-mist-gray);
}

.footer-columns-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-32);
  margin-bottom: var(--spacing-48);
}

.footer-col-title {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-16);
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.footer-links-list a {
  font-size: var(--text-body);
  color: var(--color-mist-gray);
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: var(--color-surfshark-teal);
}

.footer-bottom-bar {
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-graphite);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-caption);
  color: var(--color-mist-gray);
  flex-wrap: wrap;
  gap: var(--spacing-12);
}

/* ==========================================================================
   Scroll Reveal Animations
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-card-dark {
    grid-template-columns: 1fr;
    border-radius: var(--radius-cards);
    padding: 48px 36px 64px 36px;
  }

  .hero-headline {
    font-size: var(--text-heading-lg);
    line-height: var(--leading-heading-lg);
  }

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

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

  .grid-pricing-cards {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .grid-reviews-two {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 820px) {
  nav.main-nav,
  .nav-actions .btn-dark {
    display: none;
  }

  .burger-btn {
    display: flex;
  }

  .hero-card-dark {
    padding: 40px 24px 56px 24px;
    border-radius: var(--radius-3xl);
  }

  .hero-headline {
    font-size: 34px;
    line-height: 1.15;
    letter-spacing: -1px;
  }

  .section-title,
  .panel-title-dark,
  .testimonial-quote,
  .support-title {
    font-size: var(--text-heading-sm);
  }

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

  .devices-container {
    padding: 32px 20px;
  }

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

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

  .footer-top-row {
    flex-direction: column;
    align-items: flex-start;
  }
}