/* ============================================================
   VoiceDesk Landing Page — Standalone Mobile-First CSS
   ============================================================
   Strategy: Base styles = mobile (320px+).
   Scale up via min-width media queries for tablet/desktop.
   NO 100vh. NO overflow:hidden on body. NO !important.
   ============================================================ */

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

:root {
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;
  --color-primary: #06b6d4;
  --color-secondary: #8b5cf6;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --text-white: #ffffff;
  --text-muted: #94a3b8;
  --bg-body: #0b0f19;
  --bg-card: rgba(15, 23, 42, 0.6);
  --border-glass: rgba(255, 255, 255, 0.08);
  --transition-smooth: all 0.3s ease;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg-body);
  color: var(--text-muted);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }

/* ── Glass Card Utility ── */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm); font-size: 0.9rem;
  font-weight: 600; cursor: pointer; border: none;
  transition: var(--transition-smooth); white-space: nowrap;
  font-family: var(--font-body);
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #0ea5e9);
  color: #000; box-shadow: 0 4px 15px rgba(6,182,212,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(6,182,212,0.4); }
.btn-secondary {
  background: rgba(6,182,212,0.1); border: 1px solid rgba(6,182,212,0.3);
  color: var(--text-white);
}
.btn-secondary:hover { background: rgba(6,182,212,0.2); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ── Page Container ── */
.landing-page { max-width: 100%; overflow-x: hidden; }

/* ── Header / Nav ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  padding: 12px 16px;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 36px; height: 36px; object-fit: contain; filter: drop-shadow(0 0 8px rgba(34,197,94,0.35)); }
.brand h2 {
  font-family: var(--font-display); font-weight: 800; font-size: 1.35rem;
  letter-spacing: -0.5px; text-transform: uppercase; margin: 0;
}
.brand h2 .w { color: var(--text-white); }
.brand h2 .g { color: var(--color-success); }

/* Nav — mobile: hamburger, desktop: inline */
.nav-links { display: none; }
.nav-links a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text-white); }
.nav-actions { display: none; }

.hamburger {
  display: flex; flex-direction: column; gap: 5px; background: none;
  border: none; cursor: pointer; padding: 4px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-white); border-radius: 2px; transition: var(--transition-smooth); }

/* Mobile nav overlay */
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(11, 15, 25, 0.97); flex-direction: column;
  align-items: center; justify-content: center; gap: 24px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a { color: var(--text-white); font-size: 1.2rem; font-weight: 600; }
.mobile-nav .btn { width: 200px; text-align: center; }
.mobile-nav-close {
  position: absolute; top: 16px; right: 16px;
  background: none; border: none; color: var(--text-white);
  font-size: 1.8rem; cursor: pointer;
}

/* ── Section Wrapper ── */
.section { padding: 48px 16px; max-width: 1200px; margin: 0 auto; }
.section-border { border-top: 1px solid var(--border-glass); }
.section-title { text-align: center; margin-bottom: 32px; }
.section-title h2 { color: var(--text-white); font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.section-title p { color: var(--text-muted); font-size: 0.9rem; max-width: 600px; margin: 0 auto; }
.section-title h4 { color: var(--color-primary); font-size: 1rem; font-weight: 600; margin-top: 6px; }

/* ── Badge / Pill ── */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 20px; font-size: 0.78rem; font-weight: 600;
  background: rgba(6,182,212,0.1); border: 1px solid rgba(6,182,212,0.25);
  color: var(--color-primary);
}
.badge-success { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.2); color: var(--color-success); }
.badge-item {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.78rem; color: var(--text-muted); font-weight: 500;
}

/* ── Hero Section ── */
.hero { padding: 40px 16px 32px; max-width: 1200px; margin: 0 auto; text-align: center; }
.hero-badge { margin-bottom: 16px; }
.hero h1 {
  font-family: var(--font-display); font-size: 1.8rem; font-weight: 800;
  line-height: 1.15; color: var(--text-white); margin-bottom: 8px;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, var(--color-primary), #0ea5e9);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h2.subtitle {
  font-size: 1.15rem; font-weight: 500; color: var(--text-muted);
  margin-bottom: 16px;
}
.hero p { font-size: 0.9rem; line-height: 1.6; color: var(--text-muted); max-width: 700px; margin: 0 auto 24px; }

.hero-cta {
  display: flex; flex-direction: column; align-items: center; gap: 20px; width: 100%;
}
.hero-image {
  width: 100%; max-width: 500px; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-glass); box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  background: rgba(0,0,0,0.2); padding: 6px;
}
.hero-image img { border-radius: var(--radius-md); width: 100%; }

/* ── Live Demo Banner ── */
.demo-banner {
  margin: 32px 16px; max-width: 1200px; margin-left: auto; margin-right: auto;
  display: flex; flex-direction: column; gap: 24px;
  padding: 28px 20px; border-radius: var(--radius-xl);
  background: var(--bg-card); border: 1px solid var(--border-glass);
}
.demo-banner-left { text-align: left; }
.demo-banner-left h2 {
  color: var(--text-white); font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700; margin: 8px 0 12px;
}
.demo-banner-left h2 span { color: var(--color-primary); }
.demo-banner-left p { font-size: 0.9rem; line-height: 1.5; margin-bottom: 16px; }
.demo-badges { display: flex; flex-wrap: wrap; gap: 10px; }

.demo-banner-right {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  text-align: center;
}
.demo-phone-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1px; color: var(--color-success); font-weight: 700; }
.demo-phone-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(139,92,246,0.15));
  border: 1px solid rgba(6,182,212,0.3); color: var(--text-white);
  font-size: 1.2rem; font-weight: 700; font-family: var(--font-display);
  transition: var(--transition-smooth); text-decoration: none;
}
.demo-phone-btn:hover { background: rgba(6,182,212,0.25); transform: translateY(-2px); }
.demo-serving { font-size: 0.72rem; color: var(--text-muted); }
.demo-checklist { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; text-align: left; }
.demo-checklist li { font-size: 0.85rem; color: var(--text-muted); padding-left: 18px; position: relative; }
.demo-checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--color-success); font-weight: 700; }
.demo-banner-actions { display: flex; gap: 10px; width: 100%; margin-top: 12px; }
.demo-banner-actions .btn { flex: 1; padding: 10px; font-size: 0.85rem; }

/* ── Feature Cards (3-column grid) ── */
.features-grid {
  display: grid; grid-template-columns: 1fr; gap: 20px;
}
.feature-card {
  padding: 24px; text-align: left;
}
.feature-card-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--border-glass);
}
.feature-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.feature-icon.cyan { background: rgba(6,182,212,0.15); color: var(--color-primary); }
.feature-icon.purple { background: rgba(139,92,246,0.15); color: var(--color-secondary); }
.feature-icon.green { background: rgba(16,185,129,0.15); color: #10b981; }
.feature-card h3 { color: var(--text-white); font-size: 1.05rem; font-weight: 700; }
.feature-list { display: grid; gap: 14px; }
.feature-list li {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.5;
  padding-left: 26px; position: relative;
}
.feature-list li .icon-spot {
  position: absolute; left: 0; top: 2px; color: #10b981;
}

/* ── Metrics Grid (Economics) ── */
.metrics-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.metric-card {
  padding: 20px; border-radius: var(--radius-md);
  text-align: center;
}
.metric-card strong { color: var(--text-white); display: block; margin-bottom: 4px; font-size: 0.88rem; }
.metric-card p { font-size: 0.8rem; margin: 0; }
.metric-card .source { font-size: 0.68rem; color: var(--text-muted); opacity: 0.6; margin-top: 6px; display: block; }

/* Circle progress */
.metric-circle {
  width: 70px; height: 70px; position: relative; margin: 0 auto 10px;
}
.metric-circle svg { width: 70px; height: 70px; transform: rotate(-90deg); }
.metric-circle circle { fill: none; stroke-width: 4; cx: 35; cy: 35; r: 30; }
.metric-circle circle:first-child { stroke: rgba(255,255,255,0.06); }
.metric-circle circle.progress-bar-svg {
  stroke: var(--color, var(--color-primary));
  stroke-dasharray: 188.5; /* 2πr = 2 × π × 30 */
  stroke-dashoffset: calc(188.5 - (188.5 * var(--percent, 0)) / 100);
  stroke-linecap: round; transition: stroke-dashoffset 0.6s ease;
}
.metric-circle .number {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; color: var(--text-white);
}

/* ── ROI Calculator ── */
.roi-calculator {
  padding: 24px; border-radius: var(--radius-xl); margin-top: 32px;
}
.roi-grid { display: grid; grid-template-columns: 1fr; gap: 28px; }
.roi-slider-group { display: flex; flex-direction: column; gap: 20px; text-align: left; }
.roi-slider label { color: var(--text-white); font-weight: 600; font-size: 0.9rem; }
.roi-slider-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.roi-slider-value { color: var(--color-primary); font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }
.roi-slider input[type="range"] {
  width: 100%; height: 6px; border-radius: 3px; background: rgba(255,255,255,0.1);
  outline: none; cursor: pointer; accent-color: var(--color-primary);
  -webkit-appearance: none; appearance: none;
}
.roi-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-primary); cursor: pointer;
}
.roi-slider-ticks { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-muted); margin-top: 3px; }

.roi-output { padding: 24px; border-radius: var(--radius-lg); text-align: left; }
.roi-bar-group { margin-bottom: 12px; }
.roi-bar-label { display: flex; justify-content: space-between; font-size: 0.78rem; margin-bottom: 4px; }
.roi-bar-track { height: 22px; width: 100%; background: rgba(255,255,255,0.03); border-radius: 6px; overflow: hidden; border: 1px solid rgba(255,255,255,0.05); }
.roi-bar-fill { height: 100%; border-radius: 6px; transition: width 0.4s ease; }
.roi-bar-fill.loss { background: linear-gradient(to right, #ef4444, #f59e0b); }
.roi-bar-fill.gain { background: linear-gradient(to right, var(--color-primary), var(--color-success)); }

.roi-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border-glass); }
.roi-stat { padding: 10px; border-radius: var(--radius-sm); border: 1px solid rgba(255,255,255,0.02); background: rgba(255,255,255,0.01); }
.roi-stat-label { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 2px; }
.roi-stat-value { font-size: 1rem; font-weight: 700; }

.roi-burnout {
  background: rgba(139,92,246,0.05); border: 1px solid rgba(139,92,246,0.15);
  padding: 16px; border-radius: var(--radius-md); margin-top: 12px;
}
.roi-burnout h5 { color: var(--text-white); margin: 0 0 6px; font-size: 0.9rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.roi-burnout p { font-size: 0.78rem; line-height: 1.4; margin: 0; }

/* ── Comparison Table ── */
.comparison-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 8px; }
.comparison-table {
  width: 100%; min-width: 560px; border-collapse: collapse; font-size: 0.82rem;
}
.comparison-table th, .comparison-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border-glass); }
.comparison-table thead th { color: var(--text-muted); font-weight: 500; font-size: 0.78rem; padding-bottom: 12px; }
.comparison-table thead th:nth-child(2) { color: var(--color-primary); }
.comparison-table td strong { color: var(--text-white); font-size: 0.85rem; }
.comparison-table .vd { color: var(--color-success); }
.comparison-table .td-gray { color: var(--text-muted); }
.check-icon { color: var(--color-success); font-weight: 700; margin-right: 4px; }
.cross-icon { color: var(--color-danger); font-weight: 700; margin-right: 4px; }

/* ── Pricing Table ── */
.pricing-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 12px; }
.pricing-table { width: 100%; min-width: 640px; border-collapse: separate; border-spacing: 0; font-size: 0.85rem; }
.pricing-table col:nth-child(1) { width: 40%; }
.pricing-table col:nth-child(2) { width: 18%; }
.pricing-table col:nth-child(3) { width: 22%; }
.pricing-table col:nth-child(4) { width: 20%; }
.pricing-table thead th {
  padding: 8px 14px 20px; text-align: center; vertical-align: bottom;
  border-bottom: 1px solid var(--border-glass);
}
.pricing-table thead th:first-child { text-align: left; color: var(--text-muted); font-weight: 500; font-size: 0.78rem; }
.plan-name { font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: #94a3b8; margin-bottom: 6px; }
.plan-name.pro { color: var(--color-primary); }
.plan-price { font-size: 1.8rem; font-weight: 800; color: var(--text-white); line-height: 1; }
.plan-price span { font-size: 0.8rem; font-weight: 400; color: #94a3b8; }
.plan-setup { font-size: 0.68rem; color: var(--color-success); font-weight: 600; margin-top: 5px; }
.plan-popular {
  display: inline-block; background: linear-gradient(135deg, #06b6d4, #8b5cf6);
  color: white; font-size: 0.62rem; font-weight: 700; padding: 3px 10px;
  border-radius: 20px; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 6px;
}
.pro-col {
  background: linear-gradient(180deg, rgba(6,182,212,0.1) 0%, rgba(6,182,212,0.04) 100%);
  border: 1px solid rgba(6,182,212,0.3); border-bottom: none;
  border-radius: 14px 14px 0 0;
}

.pricing-table tbody td { padding: 8px 14px; border-bottom: 1px solid rgba(255,255,255,0.04); }
.pricing-table tbody td:first-child { text-align: left; }
.pricing-table tbody td:not(:first-child) { text-align: center; }
.pricing-table .section-label { padding: 18px 0 6px; font-size: 0.66rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: #64748b; }
.pricing-table .chk { color: var(--color-success); font-weight: 700; }
.pricing-table .cross { color: var(--text-muted); opacity: 0.4; }
.pricing-table .pv { color: var(--text-white); font-weight: 600; }
.pricing-table .addon { font-size: 0.78rem; color: var(--text-muted); }
.pricing-table .addon em { color: var(--text-white); font-style: normal; font-weight: 600; }
.pricing-table .inc { color: var(--color-success); font-weight: 600; font-size: 0.8rem; }

/* Billing toggle */
.billing-toggle { display: flex; gap: 4px; background: rgba(255,255,255,0.04); border: 1px solid var(--border-glass); border-radius: 10px; padding: 4px; margin: 16px auto 0; width: fit-content; }
.billing-toggle-btn {
  padding: 8px 16px; border-radius: 8px; font-size: 0.85rem; font-weight: 500;
  background: transparent; border: none; color: var(--text-muted); cursor: pointer;
  transition: var(--transition-smooth); display: flex; align-items: center; gap: 6px;
}
.billing-toggle-btn.active { background: rgba(6,182,212,0.15); color: var(--text-white); font-weight: 600; }
.discount-badge {
  background: linear-gradient(135deg, #f59e0b, #fbbf24); color: #000; font-weight: 800;
  font-size: 0.68rem; padding: 2px 8px; border-radius: 12px;
}

.annual-savings {
  display: none; margin-top: 10px; padding: 8px 16px; border-radius: 10px;
  background: linear-gradient(135deg, rgba(251,191,36,0.12), rgba(245,158,11,0.08));
  border: 1px solid rgba(251,191,36,0.3); font-size: 0.78rem; color: #fbbf24;
  font-weight: 600; text-align: center;
}

/* ── Footer ── */
.site-footer { padding: 48px 16px 24px; border-top: 1px solid var(--border-glass); margin-top: 48px; }
.footer-grid {
  display: grid; grid-template-columns: 1fr; gap: 32px;
  max-width: 1200px; margin: 0 auto 32px; text-align: left;
}
.footer-brand p { font-size: 0.82rem; line-height: 1.5; }
.footer-col h4 { color: var(--text-white); font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.footer-col a { color: var(--text-muted); font-size: 0.82rem; display: block; margin-bottom: 8px; transition: color 0.2s; }
.footer-col a:hover { color: var(--text-white); }
.footer-newsletter { display: flex; gap: 8px; }
.footer-newsletter input {
  flex: 1; padding: 8px 12px; font-size: 0.82rem; min-width: 0;
  background: rgba(0,0,0,0.4); border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm); color: white; outline: none;
}
.footer-newsletter input::placeholder { color: var(--text-muted); }
.footer-newsletter .btn { padding: 8px 14px; font-size: 0.82rem; flex-shrink: 0; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto; border-top: 1px solid var(--border-glass);
  padding-top: 20px; display: flex; flex-wrap: wrap; justify-content: space-between;
  align-items: center; gap: 12px; font-size: 0.75rem;
}
.footer-badges { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer-badges span { display: flex; align-items: center; gap: 5px; }

/* ── Floating Call Demo Button ── */
.floating-demo {
  position: fixed; bottom: 20px; left: 20px; z-index: 999;
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, #06b6d4, #8b5cf6);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(6,182,212,0.4); cursor: pointer;
  border: 1px solid rgba(255,255,255,0.1); transition: var(--transition-smooth);
}
.floating-demo:hover { transform: translateY(-4px) scale(1.05); box-shadow: 0 6px 25px rgba(6,182,212,0.6); }
.floating-demo::before {
  content: ''; position: absolute; width: 100%; height: 100%;
  border-radius: 50%; border: 2px solid #06b6d4;
  animation: pulse-ring 2s linear infinite; opacity: 0;
}
@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 0.4; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ── Modal System ── */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(6px);
  align-items: center; justify-content: center; padding: 16px;
}
.modal-overlay.active { display: flex; }
.modal-card {
  width: 100%; max-width: 500px; max-height: 90vh;
  display: flex; flex-direction: column; overflow: hidden;
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 20px; border-bottom: 1px solid var(--border-glass); flex-shrink: 0;
}
.modal-header h3 { color: var(--text-white); font-size: 1.15rem; display: flex; align-items: center; gap: 8px; margin: 0; }
.modal-body { overflow-y: auto; padding: 20px; }
.btn-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 1.4rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
}

/* Auth modal specifics */
.auth-header {
  background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(139,92,246,0.15));
  padding: 20px 24px 16px; border-bottom: 1px solid var(--border-glass);
  display: flex; align-items: center; justify-content: space-between;
}
.auth-header h3 { color: var(--text-white); margin: 0; font-size: 1.15rem; font-weight: 700; }
.auth-header p { margin: 3px 0 0; font-size: 0.75rem; color: var(--text-muted); }
.auth-tabs { display: flex; border-bottom: 1px solid var(--border-glass); }
.auth-tab {
  flex: 1; text-align: center; padding: 12px; cursor: pointer;
  color: var(--text-muted); font-weight: 500; font-size: 0.88rem;
  transition: all 0.2s; border-bottom: 2px solid transparent;
}
.auth-tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; color: var(--text-muted); font-size: 0.82rem; font-weight: 500; margin-bottom: 5px; }
.form-input {
  width: 100%; padding: 10px 14px; font-size: 0.88rem;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm); color: var(--text-white); outline: none;
  transition: border-color 0.2s; font-family: var(--font-body);
}
.form-input:focus { border-color: var(--color-primary); }
.form-input::placeholder { color: var(--text-muted); opacity: 0.6; }
.divider-line { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.divider-line::before, .divider-line::after { content: ''; flex: 1; height: 1px; background: var(--border-glass); }
.divider-line span { font-size: 0.72rem; color: var(--text-muted); white-space: nowrap; }

/* Wave animation (demo player) */
.wave-bar { transition: height 0.1s ease; }
.wave-bar.animate { animation: wave-bounce 1s ease-in-out infinite alternate; }
.wave-bar:nth-child(2n) { animation-delay: 0.1s; }
.wave-bar:nth-child(3n) { animation-delay: 0.25s; }
.wave-bar:nth-child(4n) { animation-delay: 0.4s; }
@keyframes wave-bounce { 0% { height: 6px; } 100% { height: 45px; } }

/* Toast container */
.toast-container {
  position: fixed; bottom: 20px; right: 20px; z-index: 99999;
  display: flex; flex-direction: column; gap: 10px; pointer-events: none;
}

/* ============================================================
   TABLET — 768px+
   ============================================================ */
@media (min-width: 768px) {
  .section { padding: 64px 32px; }
  .hero { padding: 56px 32px 40px; }
  .hero h1 { font-size: 2.4rem; }
  .hero h2.subtitle { font-size: 1.4rem; }
  .section-title h2 { font-size: 1.8rem; }

  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(3, 1fr); }

  .demo-banner { flex-direction: row; padding: 32px; }
  .demo-banner-left { flex: 1.2; }
  .demo-banner-right { flex: 0.8; align-items: center; }

  .roi-grid { grid-template-columns: 1.2fr 1fr; gap: 32px; }

  .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
}

/* ============================================================
   DESKTOP — 1024px+
   ============================================================ */
@media (min-width: 1024px) {
  .section { padding: 80px 40px; }
  .hero { padding: 72px 40px 48px; }
  .hero h1 { font-size: 3rem; }
  .hero h2.subtitle { font-size: 1.6rem; }
  .hero p { font-size: 1rem; }
  .section-title h2 { font-size: 2rem; }

  .nav-links { display: flex; align-items: center; gap: 24px; }
  .nav-actions { display: flex; align-items: center; gap: 10px; }
  .hamburger { display: none; }

  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .metrics-grid { grid-template-columns: repeat(3, 1fr); }

  .demo-banner-left h2 { font-size: 1.5rem; }
}

/* ============================================================
   LARGE DESKTOP — 1280px+
   ============================================================ */
@media (min-width: 1280px) {
  .hero h1 { font-size: 3.2rem; }
  .metrics-grid { grid-template-columns: repeat(6, 1fr); }
}