/* ============================================================
   FreedomNIN VPN — main stylesheet
   Mobile-first · Inter font · Indigo palette
   ============================================================ */

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

:root {
  --primary:       #4F46E5;
  --primary-dark:  #3730A3;
  --primary-light: #EEF2FF;
  --text:          #111827;
  --text-muted:    #6B7280;
  --bg:            #FFFFFF;
  --bg-secondary:  #F9FAFB;
  --border:        #E5E7EB;
  --success:       #10B981;
  --radius-sm:     8px;
  --radius:        16px;
  --shadow:        0 4px 24px rgba(79, 70, 229, .10);
  --shadow-hover:  0 8px 32px rgba(79, 70, 229, .18);
  --nav-h:         68px;
  --transition:    .2s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

ul[role="list"] { list-style: none; }

code {
  font-family: ui-monospace, 'SF Mono', monospace;
  font-size: .875em;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79, 70, 229, .35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.btn-sm  { padding: 9px 18px; font-size: 14px; }
.btn-lg  { padding: 15px 32px; font-size: 17px; }
.btn-full { width: 100%; }

/* ── Section typography ────────────────────────────────────── */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text);
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 56px;
}

.section-title + .section-sub { margin-top: 8px; }
.section-title:not(+ .section-sub) { margin-bottom: 48px; }

/* ══════════════════════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 200;
  background: rgba(255, 255, 255, .8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 12px rgba(0,0,0,.06);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo:hover { text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin-left: auto;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--primary); text-decoration: none; }

.nav-cta { margin-left: 8px; }

/* Burger */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-burger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.nav-mobile {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 20px;
}
.nav-mobile[aria-hidden="true"] { display: none; }
.nav-mobile ul { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.nav-mobile a {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
}
.nav-mobile a:hover { color: var(--primary); }

/* ══════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════ */
.hero {
  padding: calc(var(--nav-h) + 80px) 0 80px;
  background: linear-gradient(160deg, #EEF2FF 0%, #FFFFFF 60%);
  overflow: hidden;
}

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

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.18;
  color: var(--text);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
}
.hero-badges li {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
}

/* Shield visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.shield-wrap {
  position: relative;
  display: inline-flex;
}

.hero-shield {
  width: clamp(160px, 30vw, 220px);
  height: auto;
  filter: drop-shadow(0 12px 32px rgba(79, 70, 229, .25));
}

.shield-glow {
  position: absolute;
  inset: 20%;
  background: radial-gradient(circle, rgba(99, 102, 241, .35) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: .6; }
  50%       { transform: scale(1.15); opacity: 1; }
}

/* ══════════════════════════════════════════════════════════
   FEATURES
   ══════════════════════════════════════════════════════════ */
.features {
  padding: 80px 0;
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.feature-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
  line-height: 1;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ══════════════════════════════════════════════════════════
   PRICING
   ══════════════════════════════════════════════════════════ */
.pricing {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}
.pricing-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.pricing-card--popular {
  border: 2px solid var(--primary);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
  letter-spacing: .03em;
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.pricing-price {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 6px;
}
.pricing-price .currency {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-traffic {
  font-size: .9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pricing-features li {
  font-size: .95rem;
  color: var(--text-muted);
  padding-left: 4px;
}

/* ══════════════════════════════════════════════════════════
   SETUP (tabs)
   ══════════════════════════════════════════════════════════ */
.setup {
  padding: 80px 0;
  background: var(--bg);
}

.tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  width: fit-content;
  margin: 0 auto 40px;
}

.tab-btn {
  flex: 1;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.tab-btn:not(:last-child) { border-right: 1px solid var(--border); }
.tab-btn:hover { color: var(--primary); }
.tab-btn--active {
  background: var(--primary);
  color: #fff;
}

.tab-panel { max-width: 680px; margin: 0 auto; }
.tab-panel[hidden] { display: none; }

.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.step-body p {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.step-body a {
  color: var(--primary);
  font-weight: 500;
}

/* ══════════════════════════════════════════════════════════
   FAQ (accordion via <details>)
   ══════════════════════════════════════════════════════════ */
.faq {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.accordion {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.accordion-item[open] {
  box-shadow: var(--shadow);
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  user-select: none;
}
.accordion-trigger::-webkit-details-marker { display: none; }

.accordion-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-light);
  position: relative;
  transition: background var(--transition), transform var(--transition);
}
.accordion-icon::before,
.accordion-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--primary);
  border-radius: 2px;
}
.accordion-icon::before { width: 10px; height: 2px; }
.accordion-icon::after  { width: 2px; height: 10px; transition: transform var(--transition); }

details[open] .accordion-icon { background: var(--primary); }
details[open] .accordion-icon::before,
details[open] .accordion-icon::after { background: #fff; }
details[open] .accordion-icon::after { transform: rotate(90deg); }

.accordion-body {
  padding: 0 20px 18px;
  color: var(--text-muted);
  font-size: .97rem;
  line-height: 1.7;
}

/* ══════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-meta {
  font-size: .9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: .9rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--primary); }

.footer-copy {
  font-size: .85rem;
  color: var(--text-muted);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE — tablet (≥ 768px)
   ══════════════════════════════════════════════════════════ */
@media (min-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
  }

  .hero-text h1 {
    font-size: clamp(2.4rem, 4vw, 3.4rem);
  }

  .nav-burger { display: none; }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    align-items: flex-start;
  }
  .footer-brand { align-items: flex-start; }
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE — mobile (< 768px)
   ══════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: flex; }

  .hero {
    padding: calc(var(--nav-h) + 48px) 0 56px;
    text-align: center;
  }
  .hero-actions { justify-content: center; }
  .hero-badges  { justify-content: center; }

  .hero-visual { display: none; }

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

  .tabs {
    width: 100%;
  }
  .tab-btn { padding: 10px 14px; font-size: 14px; }

  .step { gap: 14px; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-actions  { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ══════════════════════════════════════════════════════════
   ACCESSIBILITY — prefers-reduced-motion
   ══════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .shield-glow { animation: none; }
}