/* ==========================================================================
   Skylinx - Deep Space Black Hole & Gravitational Lensing Design System
   ========================================================================== */

:root {
  --bg-void: #030307;
  --bg-deep: #070811;
  --bg-panel: rgba(12, 14, 24, 0.72);
  --bg-panel-solid: #0c0e18;
  --bg-glass: rgba(18, 21, 36, 0.56);
  --border-subtle: rgba(255, 168, 76, 0.14);
  --border-bright: rgba(255, 178, 92, 0.42);
  --border-cool: rgba(130, 170, 255, 0.18);

  --accent-amber: #ff8a2b;
  --accent-gold: #ffb85c;
  --accent-white: #fff6e8;
  --accent-blue: #6aa9ff;
  --accent-emerald: #34d399;
  --accent-rose: #fb7185;

  --text-primary: #f5f7ff;
  --text-secondary: #a5adc6;
  --text-muted: #6c7490;

  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-glow: 0 0 40px rgba(255, 138, 43, 0.18);
  --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.55);
  --nav-height: 74px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Dynamic Black Hole & Gravitational Lensing Background Canvas
   ========================================================================== */

#cosmos-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  display: block;
}

.lensing-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 44%, transparent 18%, rgba(3, 3, 7, 0.35) 55%, rgba(3, 3, 7, 0.88) 100%);
}

.site-shell {
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   Header & Navigation Bar
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 50;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 6, 13, 0.68);
  border-bottom: 1px solid rgba(255, 178, 92, 0.12);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header.scrolled {
  background: rgba(4, 5, 10, 0.9);
  border-bottom-color: rgba(255, 178, 92, 0.24);
}

.nav-container {
  max-width: 1240px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-singularity {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle, #000 38%, #ff8a2b 58%, #fff6e8 72%, transparent 78%);
  box-shadow: 0 0 18px rgba(255, 138, 43, 0.75);
  position: relative;
  flex-shrink: 0;
}

.brand-singularity::after {
  content: "";
  position: absolute;
  inset: -4px -8px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 200, 120, 0.65);
  transform: rotate(-18deg);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-white);
  background: rgba(255, 168, 76, 0.12);
}

.nav-link-kb {
  color: var(--accent-gold);
  border: 1px solid rgba(255, 184, 92, 0.22);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

/* ==========================================================================
   Buttons & Wormhole Triggers
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.22s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ff7b1c 0%, #ffb347 55%, #fff0d4 100%);
  color: #160a02;
  box-shadow: 0 0 28px rgba(255, 138, 43, 0.42), inset 0 1px 1px rgba(255, 255, 255, 0.7);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 42px rgba(255, 158, 66, 0.68), inset 0 1px 1px rgba(255, 255, 255, 0.9);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255, 184, 92, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 168, 76, 0.14);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.86rem;
}

/* ==========================================================================
   Layout Sections & Typography
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 54px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-gold);
  background: rgba(255, 138, 43, 0.1);
  border: 1px solid rgba(255, 178, 92, 0.26);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.85rem, 3.6vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  background: linear-gradient(180deg, #ffffff 20%, #ffd8a8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.02rem;
}

/* ==========================================================================
   Hero Section (Above the Fold + Gargantua Core)
   ========================================================================== */

.hero-section {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 42px);
  padding-bottom: 72px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero-top-banner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: rgba(16, 19, 34, 0.72);
  border: 1px solid rgba(255, 178, 92, 0.35);
  box-shadow: 0 0 30px rgba(255, 138, 43, 0.16);
  font-size: 0.88rem;
  color: var(--accent-white);
  backdrop-filter: blur(12px);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-amber);
  box-shadow: 0 0 12px var(--accent-amber);
  animation: pulseDot 1.8s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.45); opacity: 0.55; }
}

.hero-headline {
  max-width: 920px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.15rem, 4.8vw, 3.8rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
  text-shadow: 0 6px 36px rgba(0, 0, 0, 0.85);
}

.hero-title .highlight-glow {
  background: linear-gradient(90deg, #fff6e8 0%, #ffb85c 48%, #ff7b1c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-quote {
  font-size: clamp(1.06rem, 1.9vw, 1.32rem);
  color: #ffe8c8;
  font-weight: 500;
  max-width: 760px;
  margin: 0 auto 14px;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.9);
}

.hero-sub {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 30px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-singularity-spacer {
  height: clamp(180px, 28vh, 270px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
}

.interaction-hint {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(255, 224, 182, 0.78);
  background: rgba(8, 10, 18, 0.58);
  border: 1px solid rgba(255, 184, 92, 0.22);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
}

.hero-metrics-strip {
  width: 100%;
  max-width: 1040px;
  margin: 28px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.metric-card {
  background: rgba(10, 12, 22, 0.74);
  border: 1px solid rgba(255, 178, 92, 0.16);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  text-align: left;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.metric-card:hover {
  border-color: rgba(255, 178, 92, 0.45);
  transform: translateY(-2px);
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent-white);
}

.metric-value span {
  color: var(--accent-amber);
}

.metric-label {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ==========================================================================
   Glass Panel & Card Primitives
   ========================================================================== */

.glass-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
}

/* ==========================================================================
   Section 3: Node Latency & Status Monitor
   ========================================================================== */

.telemetry-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tab {
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.filter-tab:hover {
  color: var(--text-primary);
  border-color: rgba(255, 178, 92, 0.28);
}

.filter-tab.active {
  color: #180b02;
  background: linear-gradient(135deg, #ff8a2b, #ffc371);
  font-weight: 600;
}

.telemetry-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(275px, 1fr));
  gap: 16px;
  padding: 24px;
}

.node-card {
  background: rgba(8, 10, 19, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.node-card:hover {
  border-color: rgba(255, 178, 92, 0.42);
  transform: translateY(-2px);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-name {
  font-weight: 700;
  font-size: 0.98rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(52, 211, 153, 0.14);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 211, 153, 0.28);
}

.node-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
}

.nm-item span {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.nm-item strong {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--accent-white);
}

.nm-item strong.latency-fast { color: var(--accent-emerald); }
.nm-item strong.latency-mid { color: var(--accent-gold); }

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.node-tag {
  font-size: 0.74rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(106, 169, 255, 0.1);
  color: #a8cbff;
  border: 1px solid rgba(106, 169, 255, 0.2);
}

/* ==========================================================================
   Section 4A: Pricing Plans
   ========================================================================== */

.billing-switch-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 36px;
}

.billing-switch {
  display: inline-flex;
  padding: 5px;
  border-radius: var(--radius-pill);
  background: rgba(14, 16, 28, 0.85);
  border: 1px solid var(--border-subtle);
  gap: 4px;
}

.billing-btn {
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.billing-btn.active {
  background: linear-gradient(135deg, #ff8a2b, #ffb85c);
  color: #160a02;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.plan-card {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(18px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.plan-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 178, 92, 0.42);
}

.plan-card.featured {
  border-color: rgba(255, 178, 92, 0.6);
  background: linear-gradient(180deg, rgba(28, 22, 18, 0.86) 0%, rgba(12, 14, 24, 0.9) 100%);
  box-shadow: 0 0 46px rgba(255, 138, 43, 0.18);
}

.plan-ribbon {
  position: absolute;
  top: -12px;
  right: 20px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #ff7b1c, #ffd194);
  color: #180902;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.plan-name {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-sub {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 44px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 20px;
}

.plan-currency {
  font-size: 1.15rem;
  color: var(--accent-gold);
  font-weight: 700;
}

.plan-amount {
  font-family: var(--font-mono);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--accent-white);
  line-height: 1;
}

.plan-period {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 26px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.88rem;
  color: #d6dcee;
}

.plan-features li::before {
  content: "✦";
  color: var(--accent-amber);
  font-size: 0.85rem;
  line-height: 1.5;
  flex-shrink: 0;
}

/* ==========================================================================
   Section 4B: Core Advantages
   ========================================================================== */

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.adv-card {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  backdrop-filter: blur(16px);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.adv-card:hover {
  border-color: rgba(255, 178, 92, 0.45);
  transform: translateY(-3px);
}

.adv-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 184, 92, 0.28), rgba(255, 138, 43, 0.06));
  border: 1px solid rgba(255, 178, 92, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 18px;
  color: var(--accent-gold);
}

.adv-title {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.adv-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Section 5: FAQ Accordion
   ========================================================================== */

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(14px);
  transition: border-color 0.25s ease;
}

.faq-item.open {
  border-color: rgba(255, 178, 92, 0.45);
}

.faq-trigger {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text-primary);
}

.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(255, 178, 92, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(255, 138, 43, 0.18);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.75;
}

/* ==========================================================================
   Section 6: User Reviews
   ========================================================================== */

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 26px;
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.review-stars {
  color: var(--accent-gold);
  font-size: 0.92rem;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.review-text {
  font-size: 0.94rem;
  color: #dce2f2;
  line-height: 1.75;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff8a2b, #4a6cf7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
}

.review-name {
  font-weight: 600;
  font-size: 0.94rem;
}

.review-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid rgba(255, 178, 92, 0.14);
  background: rgba(4, 5, 10, 0.88);
  backdrop-filter: blur(16px);
  padding: 52px 0 36px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 0.94rem;
  color: var(--accent-white);
  margin-bottom: 14px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Wormhole Warp Tunnel Overlay & Lightweight Subscription Modal
   ========================================================================== */

#wormhole-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
  background: radial-gradient(circle at center, rgba(255, 240, 210, 0.15) 0%, rgba(5, 7, 15, 0.95) 75%);
  display: flex;
  align-items: center;
  justify-content: center;
}

#wormhole-overlay.active {
  opacity: 1;
  pointer-events: all;
}

#wormhole-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.wormhole-status {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  color: var(--accent-white);
  text-shadow: 0 0 22px rgba(255, 168, 76, 0.95);
  text-transform: uppercase;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(2, 3, 8, 0.78);
  backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.26s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.sub-modal {
  width: 100%;
  max-width: 470px;
  background: linear-gradient(165deg, rgba(20, 22, 36, 0.97) 0%, rgba(9, 10, 18, 0.98) 100%);
  border: 1px solid rgba(255, 178, 92, 0.48);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 0 65px rgba(255, 138, 43, 0.28);
  transform: scale(0.9) translateY(16px);
  transition: transform 0.28s cubic-bezier(0.2, 0.85, 0.32, 1);
  position: relative;
}

.modal-backdrop.open .sub-modal {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: rgba(255, 138, 43, 0.2);
  color: var(--accent-white);
}

.modal-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.modal-title {
  font-size: 1.42rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.modal-plan-box {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 168, 76, 0.08);
  border: 1px solid rgba(255, 178, 92, 0.3);
  margin-bottom: 18px;
}

.modal-plan-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  margin-bottom: 6px;
}

.modal-plan-meta {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.modal-perks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 0.84rem;
  color: #dbe2f3;
}

.modal-perks div::before {
  content: "✓ ";
  color: var(--accent-emerald);
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ==========================================================================
   Knowledge Base Portal & Article Pages (/kb/)
   ========================================================================== */

.kb-hero {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 48px;
  text-align: center;
}

.kb-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
}

.kb-search {
  flex: 1;
  min-width: 240px;
  max-width: 360px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  color: var(--text-primary);
  font-size: 0.92rem;
  outline: none;
}

.kb-search:focus {
  border-color: var(--accent-gold);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 80px;
}

.kb-card {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  backdrop-filter: blur(16px);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.kb-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 178, 92, 0.45);
}

.kb-cat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-gold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.kb-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 8px 0 10px;
}

.kb-card-excerpt {
  font-size: 0.89rem;
  color: var(--text-secondary);
}

.kb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-tag {
  font-size: 0.74rem;
  padding: 3px 9px;
  border-radius: 6px;
  background: rgba(255, 168, 76, 0.1);
  border: 1px solid rgba(255, 178, 92, 0.22);
  color: #ffd9a8;
}

.kb-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.84rem;
  color: var(--accent-gold);
  font-weight: 600;
}

/* Single Article Page Layout */
.article-shell {
  padding-top: calc(var(--nav-height) + 46px);
  padding-bottom: 84px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a:hover {
  color: var(--accent-gold);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.article-main {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  backdrop-filter: blur(18px);
}

.article-header {
  padding-bottom: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-header h1 {
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  font-weight: 800;
  line-height: 1.3;
  margin: 12px 0 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-content h2 {
  font-size: 1.38rem;
  font-weight: 700;
  color: var(--accent-white);
  margin: 34px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--accent-amber);
}

.article-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin: 22px 0 10px;
}

.article-content p {
  font-size: 0.99rem;
  line-height: 1.88;
  color: #dce2f0;
  margin-bottom: 16px;
  text-align: justify;
}

.article-content ul,
.article-content ol {
  margin: 14px 0 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-content ul li {
  list-style: disc;
  color: #d0d7ea;
  font-size: 0.96rem;
  line-height: 1.75;
}

.article-content strong {
  color: var(--accent-white);
}

.article-callout {
  margin: 24px 0;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 138, 43, 0.08);
  border: 1px solid rgba(255, 178, 92, 0.3);
}

.article-callout h4 {
  color: var(--accent-gold);
  margin-bottom: 8px;
  font-size: 1rem;
}

.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  backdrop-filter: blur(16px);
}

.sidebar-box h3 {
  font-size: 0.98rem;
  margin-bottom: 12px;
  color: var(--accent-white);
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-links a {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.45;
  transition: color 0.2s ease;
}

.sidebar-links a:hover {
  color: var(--accent-gold);
}

.article-nav-footer {
  margin-top: 38px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.article-nav-link {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: border-color 0.2s ease;
}

.article-nav-link:hover {
  border-color: var(--accent-gold);
}

.article-nav-link span {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.article-nav-link strong {
  font-size: 0.92rem;
  color: var(--accent-white);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .kb-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(6, 7, 14, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.28s ease, opacity 0.28s ease;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .hero-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantages-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .pricing-grid,
  .kb-grid,
  .footer-grid,
  .article-nav-footer {
    grid-template-columns: 1fr;
  }
  .article-main {
    padding: 26px 20px;
  }
  .hero-metrics-strip {
    grid-template-columns: 1fr;
  }
  .nav-actions .btn-secondary {
    display: none;
  }
}