/* =============================================================================
   VOXCLIENT DESIGN SYSTEM — NEXT-GEN SAAS & SOCIAL ENGINE
   Theme: Deep Titanium Carbon / Studio Porcelain with Electric Cobalt & Cyan
   Designed for High-Velocity Marketing Agencies & Modern Creators
   ============================================================================= */

/* ── Global scrollbar treatment: hide scrollbar chrome without disabling scrolling ── */
html, body, * { scrollbar-width: none !important; -ms-overflow-style: none !important; }
html::-webkit-scrollbar, body::-webkit-scrollbar, *::-webkit-scrollbar { width: 0 !important; height: 0 !important; display: none !important; }

/* ── Typography (Loaded via parallel <link> in HTML head to prevent render-blocking @import waterfall) ── */

/* ── Global Tokens (Dark Mode Default: Titanium Carbon & Electric Cobalt) ───── */
:root {
  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', 'Outfit', var(--font-sans);
  --font-editorial: 'Syne', var(--font-sans);
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, Monaco, Consolas, monospace;

  /* Color System: Deep Titanium Carbon (Not purple void) */
  --bg: #090B10;
  --bg-gradient: radial-gradient(circle at 50% 0%, #111726 0%, #090B10 65%);
  --bg-subtle: #0E121A;
  --surface: rgba(15, 20, 30, 0.85);
  --surface-solid: #0F141E;
  --surface-2: rgba(21, 28, 42, 0.9);
  --surface-2-solid: #151C2A;
  --surface-3: #1A2334;
  --surface-3-solid: #1A2334;
  --surface-card: rgba(18, 24, 37, 0.8);
  --surface-glass: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.07);

  /* Borders & Dividers */
  --border: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-mid: rgba(255, 255, 255, 0.14);
  --border-hover: rgba(59, 130, 246, 0.5);
  --border-glow: rgba(37, 99, 235, 0.45);

  /* Brand Accents: Electric Cobalt, Hyper Cyan & Emerald */
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: #3B82F6;
  --accent-bright: #60A5FA;
  --accent-dim: rgba(37, 99, 235, 0.14);
  --accent-glow: rgba(37, 99, 235, 0.35);

  --cyan: #06B6D4;
  --cyan-dim: rgba(6, 182, 212, 0.14);
  --cyan-bright: #22D3EE;

  --emerald: #10B981;
  --emerald-dim: rgba(16, 185, 129, 0.14);
  --emerald-bright: #34D399;

  --amber: #F59E0B;
  --amber-dim: rgba(245, 158, 11, 0.14);
  --rose: #EF4444;
  --rose-dim: rgba(239, 68, 68, 0.14);

  /* Typography Text Colors */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #60A5FA;

  /* Typography Scale */
  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 15px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 32px;
  --text-4xl: 42px;
  --text-5xl: 56px;
  --text-hero: 68px;

  /* Shapes & Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 35px rgba(37, 99, 235, 0.22);
  --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.2);

  /* Motion & Easing */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 180ms;
  --duration-normal: 260ms;
  --duration-slow: 400ms;
}

/* ── Light Mode System (Crisp Studio Porcelain & Cobalt) ────────────────────── */
[data-theme="light"] {
  --bg: #F8FAFC;
  --bg-gradient: radial-gradient(circle at 50% 0%, #E2E8F0 0%, #F8FAFC 70%);
  --bg-subtle: #F1F5F9;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-solid: #FFFFFF;
  --surface-2: #F1F5F9;
  --surface-2-solid: #F1F5F9;
  --surface-3: #E2E8F0;
  --surface-3-solid: #E2E8F0;
  --surface-card: #FFFFFF;
  --surface-glass: rgba(15, 23, 42, 0.03);
  --surface-hover: rgba(15, 23, 42, 0.05);

  --border: rgba(15, 23, 42, 0.09);
  --border-subtle: rgba(15, 23, 42, 0.05);
  --border-mid: rgba(15, 23, 42, 0.15);
  --border-hover: rgba(37, 99, 235, 0.45);
  --border-glow: rgba(37, 99, 235, 0.3);

  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: #3B82F6;
  --accent-bright: #1D4ED8;
  --accent-dim: rgba(37, 99, 235, 0.08);
  --accent-glow: rgba(37, 99, 235, 0.15);

  --cyan: #0891B2;
  --cyan-dim: rgba(8, 145, 178, 0.08);
  --cyan-bright: #0284C7;

  --emerald: #059669;
  --emerald-dim: rgba(5, 150, 105, 0.08);
  --emerald-bright: #10B981;

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-accent: #1D4ED8;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px -4px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 20px 48px -10px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 35px rgba(37, 99, 235, 0.12);
  --shadow-glow-cyan: 0 0 30px rgba(8, 145, 178, 0.1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: background-color var(--duration-normal) var(--ease-spring), color var(--duration-normal) var(--ease-spring);
}

::selection {
  background: rgba(37, 99, 235, 0.35);
  color: #FFFFFF;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.3);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.5);
}

/* ── Architectural Background (Clean Subtle Grid, No Floating Dots) ────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, var(--border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-subtle) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 20%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 20%, #000 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.bg-noise, .bg-lights, .bg-orb-bottom, #ambient-canvas {
  display: none !important;
}

.page-content {
  position: relative;
  z-index: 2;
  width: 100%;
}

.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Universal Navigation Bar (Social Island Header) ───────────────────────── */
.nav {
  position: sticky;
  top: 14px;
  z-index: 1000;
  width: 100%;
  padding: 0 16px;
  transition: all var(--duration-normal) var(--ease-spring);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 9px 18px;
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px -6px rgba(0, 0, 0, 0.35);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.nav-inner:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

/* Logo */
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 850;
  letter-spacing: -0.035em;
  transition: transform var(--duration-fast) var(--ease-spring);
  flex-shrink: 0;
}

.nav-logo:hover {
  transform: scale(1.02);
}

.nav-logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 25px;
  font-weight: 900;
  letter-spacing: -0.035em;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

.nav-logo-text span {
  color: var(--accent-light);
}

/* Navigation Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a,
.nav-links .nav-link-button {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links .nav-link-button:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.nav-links a.active {
  color: var(--text-primary);
  background: var(--surface-hover);
  font-weight: 600;
}

.nav-links #main-nav-workspace {
  background: rgba(37, 99, 235, 0.15);
  color: var(--accent-bright);
  font-weight: 600;
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 6px 14px;
}

.nav-links #main-nav-workspace:hover {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

/* Nav Actions (Buttons, Theme Toggle, Hamburger) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--duration-fast);
}

.theme-toggle-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn-nav-login {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.btn-nav-login:hover {
  color: var(--text-primary);
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, var(--accent), #1D4ED8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
  transition: all var(--duration-fast);
}

.btn-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

/* Hamburger for Mobile */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--surface-glass);
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
}

.hamburger-line {
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-fast);
}

.hamburger.is-open .hamburger-line:nth-child(1),
.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open .hamburger-line:nth-child(2),
.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open .hamburger-line:nth-child(3),
.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu Drawer */
.mobile-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 16px;
  right: 16px;
  background: var(--surface-solid);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  z-index: 1001;
}

.mobile-menu.is-active,
.mobile-menu.is-open {
  display: block;
  animation: slideDownFade 0.25s var(--ease-spring);
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mobile-nav-link {
  display: block;
  padding: 10px 14px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast);
}

.mobile-nav-link:hover {
  background: var(--surface-hover);
}

.mobile-nav-cta {
  background: linear-gradient(135deg, var(--accent), #1D4ED8) !important;
  color: #FFFFFF !important;
  font-weight: 600;
  margin-top: 6px;
}

/* ── Typography & Display Headings ─────────────────────────────────────────── */
.display-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.5vw, var(--text-hero));
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--text-primary);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.8vw, var(--text-4xl));
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-sub {
  font-size: clamp(15px, 1.8vw, 17px);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 620px;
}

.accent-word {
  background: linear-gradient(135deg, #60A5FA 0%, #38BDF8 50%, #22D3EE 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent-bright);
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-label-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-light);
  box-shadow: 0 0 8px var(--accent-light);
}

/* ── Buttons & CTAs ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-spring);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #1D4ED8);
  color: #FFFFFF !important;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(37, 99, 235, 0.5);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text-primary);
  border-color: var(--border-mid);
}

.btn-secondary:hover {
  background: var(--surface-3);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  border-color: var(--border-mid);
}

.btn-lg {
  padding: 13px 28px;
  font-size: 15px;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12.5px;
}

/* ── Badge Component System ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--surface-2);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  line-height: 1.2;
  white-space: nowrap;
}

.badge-violet,
.badge-accent {
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent-bright);
  border-color: rgba(59, 130, 246, 0.28);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.12);
  color: var(--cyan-bright);
  border-color: rgba(6, 182, 212, 0.28);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.12);
  color: var(--emerald-bright);
  border-color: rgba(16, 185, 129, 0.28);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.12);
  color: var(--amber);
  border-color: rgba(245, 158, 11, 0.28);
}

.badge-rose {
  background: rgba(239, 68, 68, 0.12);
  color: #F87171;
  border-color: rgba(239, 68, 68, 0.28);
}

/* ── Form Controls System ───────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
  width: 100%;
}

.label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.input,
select.input,
textarea.input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14.5px;
  outline: none;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background var(--duration-fast);
}

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

.input:focus,
select.input:focus,
textarea.input:focus {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
  background: var(--surface-3);
}

textarea.input {
  resize: vertical;
  min-height: 110px;
  line-height: 1.55;
}

/* ── Responsive Layout Grid Utilities ───────────────────────────────────────── */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.grid-contact {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 36px;
  align-items: start;
}

/* ── VoxCard Component System ───────────────────────────────────────────────── */
.vox-card {
  position: relative;
  background: var(--surface-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-spring);
  overflow: hidden;
}

.vox-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-3px);
}

/* ── Hero Badges & Metric Pills ─────────────────────────────────────────────── */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--text-primary);
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--emerald-bright);
  box-shadow: 0 0 8px var(--emerald-bright);
}

.hero-metric-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-glass);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.hero-metric-pill:hover {
  color: var(--text-primary);
  border-color: rgba(59, 130, 246, 0.35);
  background: var(--surface-hover);
}

.hero-metric-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-light);
}

/* ── Waveform Equalizer ─────────────────────────────────────────────────────── */
.waveform-equalizer {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 18px;
}

.waveform-bar {
  width: 3px;
  height: 100%;
  background: var(--accent-light);
  border-radius: 2px;
  animation: equalize 1.2s ease-in-out infinite alternate;
}

.waveform-bar:nth-child(1) { animation-delay: 0.1s; height: 35%; }
.waveform-bar:nth-child(2) { animation-delay: 0.3s; height: 75%; }
.waveform-bar:nth-child(3) { animation-delay: 0.0s; height: 100%; }
.waveform-bar:nth-child(4) { animation-delay: 0.4s; height: 60%; }
.waveform-bar:nth-child(5) { animation-delay: 0.2s; height: 40%; }

@keyframes equalize {
  0% { transform: scaleY(0.3); }
  50% { transform: scaleY(1); }
  100% { transform: scaleY(0.4); }
}

/* ── 4 Pillars Feature Cards ────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.vox-feature-card {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--surface-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all var(--duration-normal) var(--ease-spring);
}

.vox-feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.feature-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-bright);
}

.feature-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-display);
}

.feature-card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Pricing Tiers & Billing Elements ───────────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.pricing-card {
  position: relative;
  padding: 32px 24px;
  border-radius: var(--radius-xl);
  background: var(--surface-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--duration-normal) var(--ease-spring);
}

.pricing-card.is-popular {
  border-color: var(--accent-light);
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.22);
}

.pricing-popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent), #1D4ED8);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.pricing-plan-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-display);
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  min-height: 40px;
  margin-bottom: 20px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.pricing-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.pricing-amount {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.pricing-period {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.45;
}

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

/* ── FAQ Accordion System ───────────────────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--duration-fast);
}

.faq-item:hover {
  border-color: rgba(59, 130, 246, 0.35);
}

.faq-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--duration-fast);
  flex-shrink: 0;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-bright);
}

.faq-content {
  display: none;
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.65;
}

.faq-item.is-open .faq-content {
  display: block;
}

/* ── Social Card / Post Preview Component ───────────────────────────────────── */
.social-post-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-spring);
}

.social-post-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.social-card-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.social-card-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #1D4ED8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #FFFFFF;
  font-size: 14px;
}

.social-card-name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.social-card-handle {
  color: var(--text-muted);
  font-size: 12.5px;
}

.social-card-body {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.social-card-metrics {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12.5px;
}

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 320px;
  margin-top: 12px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  transition: color var(--duration-fast);
}

.footer-nav-list a:hover {
  color: var(--accent-bright);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12.5px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* ── FAQ Accordion System ───────────────────────────────────────────────────── */
.faq-accordion-item {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--duration-fast);
}

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

.faq-accordion-item.is-open,
.faq-accordion-item.open {
  border-color: rgba(59, 130, 246, 0.4);
  background: var(--surface-solid);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.faq-accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--text-primary);
  user-select: none;
  transition: color var(--duration-fast);
}

.faq-accordion-header:hover {
  color: var(--accent-bright);
}

.faq-accordion-icon {
  font-size: 22px;
  line-height: 1;
  color: var(--accent);
  transition: transform 0.22s var(--ease-spring);
  font-weight: 400;
  margin-left: 14px;
  flex-shrink: 0;
}

.faq-accordion-item.is-open .faq-accordion-icon,
.faq-accordion-item.open .faq-accordion-icon {
  transform: rotate(45deg);
  color: var(--accent-bright);
}

.faq-accordion-content {
  padding: 0 24px 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-secondary);
  display: none;
}

.faq-accordion-item.is-open .faq-accordion-content,
.faq-accordion-item.open .faq-accordion-content {
  display: block;
}

/* Playground comparison outputs grid */
.playground-outputs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* ── Responsive Rules ───────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 868px) {
  .nav-links {
    display: none;
  }
  .hamburger {
    display: flex;
    min-width: 44px;
    min-height: 44px;
  }
  .hero-layout {
    grid-template-columns: 1fr !important;
    gap: 36px !important;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .playground-outputs-grid {
    grid-template-columns: 1fr !important;
  }
  .grid-2col,
  .grid-contact {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .nav {
    padding: 0 10px;
    top: 8px;
  }
  .nav-inner {
    padding: 7px 12px;
    gap: 8px;
  }
  .mobile-menu {
    left: 8px;
    right: 8px;
  }
  .nav-logo {
    font-size: 17px;
    gap: 8px;
  }
  .nav-logo-mark {
    width: 28px;
    height: 28px;
  }
  .nav-actions {
    gap: 6px;
  }
  .nav-actions .btn-ghost,
  .nav-actions .theme-toggle-btn {
    padding: 6px 10px !important;
    min-height: 36px !important;
    margin-right: 2px !important;
    font-size: 13px !important;
  }
  .theme-text {
    display: none !important;
  }
  .vox-card {
    padding: clamp(18px, 4.5vw, 26px) !important;
  }
  .display-title,
  .section-title {
    word-break: break-word;
    overflow-wrap: break-word;
  }
  .btn-lg {
    padding: 11px 22px;
    font-size: 14px;
    width: 100%;
  }
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
  .hero-ctas .btn {
    width: 100%;
  }
}

@media (max-width: 380px) {
  .nav-inner {
    padding: 6px 8px;
    gap: 4px;
  }
  .nav-logo-text {
    font-size: 15px;
  }
  .nav-actions {
    gap: 4px;
  }
  #main-nav-workspace {
    padding: 6px 8px !important;
    font-size: 12px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ================================================================
   Billing Explainer Agreement Checkbox & Layout
   ================================================================ */
.explainer-agreement-wrap {
  margin-top: 16px !important;
  padding: 14px 16px !important;
  border-radius: 12px !important;
  background: rgba(124, 58, 237, 0.08) !important;
  border: 1px solid rgba(139, 92, 246, 0.25) !important;
  transition: all 0.2s ease !important;
}
.explainer-agreement-wrap:hover {
  border-color: rgba(139, 92, 246, 0.5) !important;
  background: rgba(124, 58, 237, 0.12) !important;
}
.explainer-agreement-label {
  display: flex !important;
  align-items: flex-start !important;
  gap: 12px !important;
  cursor: pointer !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--text-primary, #ffffff) !important;
  line-height: 1.5 !important;
  user-select: none !important;
  margin: 0 !important;
}
.explainer-agreement-checkbox {
  width: 20px !important;
  height: 20px !important;
  min-width: 20px !important;
  min-height: 20px !important;
  margin: 2px 0 0 0 !important;
  padding: 0 !important;
  cursor: pointer !important;
  accent-color: #8b5cf6 !important;
  border-radius: 5px !important;
  flex-shrink: 0 !important;
  display: inline-block !important;
  opacity: 1 !important;
  visibility: visible !important;
}
.explainer-agreement-checkbox:focus-visible {
  outline: 2px solid #a78bfa !important;
  outline-offset: 2px !important;
}
.explainer-agreement-text {
  flex: 1 !important;
  word-break: break-word !important;
}
[data-theme="light"] .explainer-agreement-wrap {
  background: rgba(124, 58, 237, 0.05) !important;
  border: 1px solid rgba(124, 58, 237, 0.22) !important;
}
[data-theme="light"] .explainer-agreement-label {
  color: #1e1b4b !important;
}
[data-theme="light"] .explainer-agreement-wrap:hover {
  background: rgba(124, 58, 237, 0.09) !important;
  border-color: rgba(124, 58, 237, 0.4) !important;
}