/* LimonVPN Design System & Stylesheet (No build tools) */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Dark Mode (Default) matching LimonVPN Android App */
  --bg-primary: #121212;
  --bg-surface: #18181B;
  --bg-card: #1E1E22;
  --bg-card-hover: #27272E;
  --border-color: #2E2E36;
  --border-hover: #3F3F46;
  
  --accent-lime: #A3E635;
  --accent-lime-hover: #84CC16;
  --accent-lime-glow: rgba(163, 230, 53, 0.18);
  --text-on-lime: #09090B;
  --accent-gradient: linear-gradient(135deg, #A3E635 20%, #4ADE80 80%);
  
  --text-primary: #F4F4F5;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  
  --badge-bg: rgba(163, 230, 53, 0.12);
  --badge-text: #BEF264;
  --badge-border: rgba(163, 230, 53, 0.28);
  
  --success-color: #4ADE80;
  --success-bg: rgba(74, 222, 128, 0.12);
  --success-border: rgba(74, 222, 128, 0.28);
  
  --danger-color: #F87171;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-border: rgba(239, 68, 68, 0.28);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.5);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --container-max-width: 1140px;
}

/* Light Mode Support */
@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --border-color: #E2E8F0;
    --border-hover: #CBD5E1;
    
    --accent-lime: #65A30D;
    --accent-lime-hover: #4D7C0F;
    --accent-lime-glow: rgba(101, 163, 13, 0.15);
    --text-on-lime: #FFFFFF;
    --accent-gradient: linear-gradient(135deg, #65A30D 20%, #16A34A 80%);
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    
    --badge-bg: rgba(101, 163, 13, 0.12);
    --badge-text: #4D7C0F;
    --badge-border: rgba(101, 163, 13, 0.28);
    
    --success-color: #16A34A;
    --success-bg: rgba(22, 163, 74, 0.12);
    --success-border: rgba(22, 163, 74, 0.28);
    
    --danger-color: #DC2626;
    --danger-bg: rgba(220, 38, 38, 0.12);
    --danger-border: rgba(220, 38, 38, 0.28);
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(18, 18, 18, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

@media (prefers-color-scheme: light) {
  .site-header {
    background-color: rgba(248, 250, 252, 0.88);
  }
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-primary);
}

.brand-logo-icon {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #A3E635 0%, #65A30D 100%);
  border-radius: var(--radius-sm);
  color: #09090B;
  box-shadow: 0 0 16px var(--accent-lime-glow);
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  border-radius: var(--radius-full);
  margin-left: 0.25rem;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

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

.nav-link:hover {
  color: var(--accent-lime);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  line-height: 1.25;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.9rem 1.8rem;
  font-size: 1.05rem;
}

.btn-primary {
  background-color: var(--accent-lime);
  color: var(--text-on-lime);
  font-weight: 700;
  box-shadow: 0 2px 10px var(--accent-lime-glow);
}

.btn-primary:hover {
  background-color: var(--accent-lime-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-lime-glow);
}

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

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

.btn-block {
  width: 100%;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success-color);
  border-color: var(--success-border);
}

.badge-danger {
  background-color: var(--danger-bg);
  color: var(--danger-color);
  border-color: var(--danger-border);
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero-section {
    padding: 5rem 0 4.5rem;
  }
}

.hero-pill {
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.15rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  max-width: 820px;
  margin: 0 auto 1.25rem;
}

@media (min-width: 640px) {
  .hero-title {
    font-size: 2.75rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.4rem;
  }
}

.hero-title-gradient,
#accent-gradient {
  background: var(--accent-gradient, linear-gradient(135deg, #A3E635 20%, #4ADE80 80%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (prefers-color-scheme: light) {
  .hero-title-gradient,
  #accent-gradient {
    background: linear-gradient(135deg, #65A30D 20%, #16A34A 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.2rem;
  }
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  justify-content: center;
  align-items: center;
  max-width: 440px;
  margin: 0 auto 2.5rem;
}

@media (min-width: 640px) {
  .hero-cta-group {
    flex-direction: row;
    max-width: none;
  }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 760px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

@media (min-width: 640px) {
  .hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.hero-stat-card {
  padding: 0.75rem;
}

.hero-stat-value {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-lime);
  margin-bottom: 0.2rem;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Feature Cards Grid */
.section {
  padding: 3.5rem 0;
}

@media (min-width: 768px) {
  .section {
    padding: 5rem 0;
  }
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2.5rem;
}

.section-tag {
  color: var(--accent-lime);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.35rem;
  }
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

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

.card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--badge-bg);
  color: var(--accent-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.15rem;
  flex-shrink: 0;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Steps (How it works) */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
}

.step-number {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Accordion FAQ */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--border-hover);
}

.faq-summary {
  padding: 1.15rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  list-style: none;
}

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

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-lime);
}

.faq-content {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Result / Status Container (Success / Fail Pages) */
.status-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
}

.status-card {
  width: 100%;
  max-width: 540px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

@media (min-width: 640px) {
  .status-card {
    padding: 3rem 2.5rem;
  }
}

.status-icon-wrap {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: var(--radius-full);
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-icon-wrap.success {
  background-color: var(--success-bg);
  border: 2px solid var(--success-border);
  color: var(--success-color);
}

.status-icon-wrap.fail {
  background-color: var(--danger-bg);
  border: 2px solid var(--danger-border);
  color: var(--danger-color);
}

.status-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  line-height: 1.25;
}

.status-subtitle {
  font-size: 0.975rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.status-info-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  text-align: left;
  margin-bottom: 1.75rem;
}

.status-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  padding: 0.35rem 0;
}

.status-info-row:not(:last-child) {
  border-bottom: 1px dashed var(--border-color);
}

.status-info-label {
  color: var(--text-muted);
}

.status-info-value {
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.instructions-card {
  text-align: left;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1.75rem;
  font-size: 0.875rem;
}

.instructions-title {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.instructions-list {
  padding-left: 1.25rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

/* Legal Pages (Privacy & Terms) */
.legal-page {
  padding: 3rem 0 4rem;
  flex: 1;
}

.legal-content-card {
  max-width: 860px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.15rem;
}

@media (min-width: 640px) {
  .legal-content-card {
    padding: 2.25rem 2rem;
  }
}

@media (min-width: 768px) {
  .legal-content-card {
    padding: 3rem;
  }
}

.legal-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 1.75rem;
}

.legal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.25;
  word-break: break-word;
}

@media (min-width: 640px) {
  .legal-title {
    font-size: 1.85rem;
  }
}

.legal-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.legal-body h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.legal-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.legal-body ul {
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Site Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  padding: 3rem 0 2rem;
  margin-top: auto;
}

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

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 320px;
  margin-top: 0.75rem;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--accent-lime);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
  }
}