/* ==========================================================================
   iKuuu VPN - High-End Dark Technical Theme
   Military-Grade Privacy For Professionals
   Palette: Near-black #151310, Ivory #EDE6DA, Amber #F0A227, Graphite #26231E
   Flat styling only - No gradients, No glows. 120ms transitions.
   ========================================================================== */

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

:root {
  --bg-main: #151310;
  --bg-card: #26231E;
  --bg-card-sub: #1e1b17;
  --text-main: #EDE6DA;
  --text-muted: #a69f93;
  --accent: #F0A227;
  --accent-hover: #d98f1f;
  --border-line: rgba(237, 230, 218, 0.15);
  --border-solid: #38342c;
  --border-accent: #F0A227;
  
  --font-heading: 'Sora', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Sora', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, "Courier New", monospace;
  
  --transition-speed: 120ms;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  letter-spacing: -0.03em;
  font-weight: 700;
  line-height: 1.2;
}

p {
  color: var(--text-muted);
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

/* Container */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--border-line);
  height: 72px;
}

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

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

.brand-logo-svg {
  width: 34px;
  height: 38px;
  flex-shrink: 0;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-main);
}

.brand-text span {
  color: var(--accent);
}

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

.nav-menu a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 0;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--text-main);
}

.nav-menu a.highlight-nav {
  color: var(--accent);
  font-weight: 600;
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Button Styles - Strictly Flat */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-speed) ease;
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background-color: var(--accent);
  color: #151310;
  border-color: var(--accent);
  font-weight: 700;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: #2e2a24;
  border-color: rgba(237, 230, 218, 0.35);
  color: #ffffff;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

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

/* Section Common */
.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--border-line);
}

.section-title-wrap {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
}

.section-label {
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Hero Section */
.hero-section {
  padding-top: 156px;
  padding-bottom: 96px;
  border-bottom: 1px solid var(--border-line);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  padding: 6px 14px;
  border-radius: 4px;
  color: var(--text-main);
  font-size: 0.82rem;
  margin-bottom: 24px;
}

.hero-badge .status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 20px;
}

.hero-title span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-security-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Shield Visual & Interactive Toggle */
.hero-visual-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 36px 32px;
  text-align: center;
  position: relative;
}

.shield-container {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.hero-shield-svg {
  width: 160px;
  height: 180px;
  transition: transform var(--transition-speed) ease;
}

/* Interactive Shield Keyhole filling */
.shield-keyhole {
  fill: #EDE6DA;
  transition: fill var(--transition-speed) ease;
}

.hero-visual-card.connected .shield-keyhole {
  fill: var(--accent);
}

.hero-visual-card.connected .shield-outline {
  stroke: var(--accent);
}

.terminal-status-box {
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 24px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.status-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.status-row:last-child {
  margin-bottom: 0;
}

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

.status-val {
  color: var(--text-main);
  font-weight: 500;
}

.status-val.active {
  color: var(--accent);
  font-weight: 700;
}

/* Interactive Toggle Switch */
.connection-switch-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.toggle-switch-btn {
  background: var(--bg-main);
  border: 1px solid var(--border-line);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all var(--transition-speed) ease;
}

.toggle-indicator {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background-color: #555047;
  transition: background-color var(--transition-speed) ease;
}

.hero-visual-card.connected .toggle-indicator {
  background-color: var(--accent);
}

.toggle-switch-btn:hover,
.toggle-switch-btn:focus {
  border-color: var(--accent);
}

/* Trust Bar */
.trust-bar {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-line);
  padding: 24px 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.trust-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 8px 12px;
}

.trust-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--accent);
}

.trust-item h4 {
  font-size: 0.98rem;
  margin-bottom: 4px;
  color: var(--text-main);
}

.trust-item p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Feature Cards (3 core advantages) */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 32px 28px;
  transition: border-color var(--transition-speed) ease;
}

.feature-card:hover {
  border-color: rgba(237, 230, 218, 0.4);
}

.feature-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  background-color: var(--bg-main);
  padding: 4px 8px;
  border-radius: 2px;
}

.feature-card-icon {
  width: 36px;
  height: 36px;
  color: var(--text-main);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Streaming & AI Support Cards */
.media-ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.media-ai-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 36px 32px;
}

.media-ai-card h3 {
  font-size: 1.35rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 8px;
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  color: var(--accent);
  border-radius: 2px;
}

.media-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

.media-pill {
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: 4px;
}

.metric-bar {
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  padding: 14px 18px;
  border-radius: 4px;
  font-size: 0.86rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Spec Checklist / Engineering Spec Section */
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.spec-panel {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 32px;
}

.spec-panel h3 {
  font-size: 1.18rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-line);
  color: var(--text-main);
}

.spec-list {
  list-style: none;
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(237, 230, 218, 0.1);
  font-size: 0.9rem;
}

.spec-list li:last-child {
  border-bottom: none;
}

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

.spec-value {
  font-family: var(--font-mono);
  color: var(--text-main);
  font-weight: 500;
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition-speed) ease;
}

.pricing-card.featured {
  border: 2px solid var(--accent);
  background-color: #2b2721;
}

.pricing-featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent);
  color: #151310;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 2px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-plan-name {
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 42px;
  margin-bottom: 20px;
}

.pricing-price {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-line);
}

.price-currency {
  font-size: 1.2rem;
  color: var(--text-main);
  vertical-align: top;
}

.price-num {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.pricing-card.featured .price-num {
  color: var(--accent);
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.check-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 3px;
}

.pricing-card .btn {
  width: 100%;
}

/* User Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: var(--accent);
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.review-content {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--text-main);
  margin-bottom: 20px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(237, 230, 218, 0.1);
  padding-top: 14px;
}

.avatar-circle {
  width: 38px;
  height: 38px;
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent);
}

.author-info h4 {
  font-size: 0.92rem;
  margin-bottom: 2px;
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--text-main);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform var(--transition-speed) ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 200ms ease, padding 200ms ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px 24px;
}

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

/* Footer Section */
.site-footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-line);
  padding: 56px 0 40px 0;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-line);
  margin-bottom: 32px;
}

.footer-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-main);
  background-color: var(--bg-main);
  border: 1px solid var(--border-line);
  padding: 6px 14px;
  border-radius: 4px;
}

.footer-status-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #3bb273;
  border-radius: 50%;
}

/* Strict requirement: Footer only retains 4 titles, clicking opens a new page */
.footer-nav-only-4 {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 24px 0;
}

.footer-nav-only-4 a {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
}

.footer-nav-only-4 a:hover,
.footer-nav-only-4 a:focus {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Article / News Insights Page Styling */
.article-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 40px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-meta {
  display: flex;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.article-card h2 {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-read-link {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-read-link:hover {
  text-decoration: underline;
}

.article-body-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 40px;
  margin-top: 32px;
  line-height: 1.8;
}

.article-body-content h2 {
  font-size: 1.6rem;
  margin: 32px 0 16px 0;
  color: var(--text-main);
}

.article-body-content h3 {
  font-size: 1.3rem;
  margin: 24px 0 12px 0;
  color: var(--accent);
}

.article-body-content p {
  margin-bottom: 18px;
  font-size: 1rem;
  color: #c9c2b5;
}

.article-body-content ul {
  margin: 0 0 20px 24px;
  color: #c9c2b5;
}

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

.article-body-content a {
  color: var(--accent);
  text-decoration: underline;
}

.article-body-content a:hover {
  color: #ffbe4a;
}

/* Static Subpage (About, Terms, Privacy, Sitemap) */
.subpage-container {
  padding-top: 120px;
  padding-bottom: 80px;
  max-width: 860px;
  margin: 0 auto;
}

.subpage-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 6px;
  padding: 48px;
}

.subpage-card h1 {
  font-size: 2.4rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-line);
}

.subpage-card h2 {
  font-size: 1.45rem;
  margin: 32px 0 14px 0;
  color: var(--accent);
}

.subpage-card p {
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 16px;
  color: #c9c2b5;
}

.subpage-card ul {
  margin: 0 0 24px 24px;
  color: #c9c2b5;
}

.subpage-card li {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .cards-grid-3,
  .pricing-grid,
  .reviews-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .media-ai-grid,
  .spec-grid,
  .article-list-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: auto;
    padding: 14px 0;
  }
  
  .nav-wrap {
    flex-wrap: wrap;
    gap: 12px;
  }
  
  .nav-menu {
    order: 3;
    width: 100%;
    justify-content: space-around;
    gap: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-line);
  }
  
  .hero-section {
    padding-top: 140px;
  }
  
  .hero-title {
    font-size: 2.3rem;
  }
  
  .hero-subtitle {
    font-size: 1.15rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .footer-top {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .footer-nav-only-4 {
    flex-direction: column;
    gap: 16px;
  }
  
  .subpage-card {
    padding: 24px 18px;
  }
}