:root {
  --bg-primary: #07090e;
  --bg-secondary: #0e131f;
  --bg-card: rgba(18, 25, 40, 0.75);
  --bg-card-hover: rgba(26, 36, 56, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.3);
  
  --primary: #00f2fe;
  --primary-glow: #4facfe;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-orange: #f59e0b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 85%, rgba(79, 172, 254, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Background grid effect */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  line-height: 1.1;
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 16px;
  text-align: center;
}

p.lead {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 32px auto;
}

.gradient-text {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-badge {
  background: linear-gradient(135deg, #00f2fe, #4facfe);
  color: #07090e;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 6px;
  text-transform: uppercase;
}

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

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-dot-anim 1.5s infinite;
}

@keyframes pulse-dot-anim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
  font-family: var(--font-main);
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #07090e;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

/* Hero Section */
.hero {
  padding: 70px 0 50px 0;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 30px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  max-width: 900px;
  margin: 0 auto 50px auto;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 18px;
  border-radius: var(--radius-md);
  text-align: center;
}

.stat-val {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: #fff;
}

.stat-lbl {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* LIVE VOICE DEMO COMPONENT */
.demo-section {
  padding: 20px 0 80px 0;
}

.demo-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(0, 242, 254, 0.25);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 242, 254, 0.1);
  border-radius: 28px;
  overflow: hidden;
  max-width: 960px;
  margin: 0 auto;
}

.demo-header {
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.demo-title-group h3 {
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.demo-controls-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.scenario-tabs {
  display: flex;
  gap: 8px;
  padding: 16px 32px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.scenario-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.scenario-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.scenario-btn.active {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

.demo-body {
  padding: 40px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

@media (max-width: 820px) {
  .demo-body {
    grid-template-columns: 1fr;
  }
}

/* Voice Visualizer Area */
.visualizer-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.orb-container {
  width: 240px;
  height: 240px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

#voice-canvas {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

.orb-inner {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.25) 0%, rgba(79, 172, 254, 0.05) 70%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  border: 1px solid rgba(0, 242, 254, 0.3);
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
  transition: var(--transition);
}

.orb-inner.speaking {
  box-shadow: 0 0 50px rgba(0, 242, 254, 0.6), 0 0 20px rgba(139, 92, 246, 0.5);
  border-color: #00f2fe;
}

.orb-inner.listening {
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.5);
  border-color: #10b981;
}

.orb-inner.interrupted {
  box-shadow: 0 0 50px rgba(239, 68, 68, 0.8);
  border-color: #ef4444;
}

.status-badge {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.status-badge.interrupted {
  color: #f87171;
  animation: shake 0.3s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.call-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  transition: var(--transition);
  position: relative;
}

.call-btn.start {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 0 25px rgba(16, 185, 129, 0.4);
}

.call-btn.start:hover {
  transform: scale(1.08);
  box-shadow: 0 0 35px rgba(16, 185, 129, 0.7);
}

.call-btn.hangup {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  box-shadow: 0 0 25px rgba(239, 68, 68, 0.4);
}

.call-btn.hangup:hover {
  transform: scale(1.08);
  box-shadow: 0 0 35px rgba(239, 68, 68, 0.7);
}

/* Transcript & Tool Execution Feed */
.transcript-panel {
  background: rgba(10, 14, 24, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  height: 380px;
}

.transcript-header {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.transcript-messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 6px;
}

.transcript-messages::-webkit-scrollbar {
  width: 4px;
}

.transcript-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.msg-bubble {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.9rem;
  max-width: 90%;
  line-height: 1.45;
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg-assistant {
  align-self: flex-start;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  color: #e2e8f0;
}

.msg-user {
  align-self: flex-end;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
}

.msg-meta {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.tool-alert-badge {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #6ee7b7;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  margin: 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

/* Modal Settings */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.open {
  display: flex;
}

.modal-box {
  background: #0f1523;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  border-radius: 20px;
  width: 100%;
  max-width: 520px;
  padding: 28px;
  position: relative;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close:hover {
  color: #fff;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.form-group input, .form-group select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

/* Srovnání eHlas vs KraftunAI */
.section {
  padding: 80px 0;
}

.comparison-table-wrapper {
  overflow-x: auto;
  margin-top: 40px;
}

.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: rgba(0, 0, 0, 0.3);
  font-family: var(--font-heading);
  font-size: 1.1rem;
}

.comparison-table th.highlight, .comparison-table td.highlight {
  background: rgba(0, 242, 254, 0.06);
  border-left: 1px solid rgba(0, 242, 254, 0.2);
  border-right: 1px solid rgba(0, 242, 254, 0.2);
}

.badge-tag-win {
  color: #10b981;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-tag-lose {
  color: #ef4444;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Feature Cards Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 242, 254, 0.3);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(79, 172, 254, 0.05));
  border: 1px solid rgba(0, 242, 254, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Steps Process */
.step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.step-number {
  font-size: 2.2rem;
  font-weight: 900;
  font-family: var(--font-heading);
  color: rgba(0, 242, 254, 0.25);
  margin-bottom: 12px;
}

/* Calculator */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 800px;
  margin: 40px auto 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

@media (max-width: 700px) {
  .calc-card {
    grid-template-columns: 1fr;
  }
}

.calc-slider-group {
  margin-bottom: 24px;
}

.calc-slider-group label {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 8px;
}

input[type=range] {
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}

.calc-result-box {
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
}

.calc-saved-val {
  font-size: 2.8rem;
  font-weight: 800;
  color: #10b981;
  font-family: var(--font-heading);
  line-height: 1.1;
  margin: 10px 0;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-top: 40px;
}

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

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

.pricing-card.popular {
  border-color: var(--primary);
  box-shadow: 0 10px 40px rgba(0, 242, 254, 0.15);
  background: linear-gradient(180deg, rgba(0, 242, 254, 0.06) 0%, rgba(18, 25, 40, 0.8) 100%);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: linear-gradient(135deg, #00f2fe, #4facfe);
  color: #07090e;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 12px;
}

.pricing-price {
  font-size: 2.6rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: #fff;
  margin: 16px 0;
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin: 24px 0 32px 0;
  flex: 1;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 900;
}

/* FAQ Accordion */
.faq-list {
  max-width: 800px;
  margin: 40px auto 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1.05rem;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-toggle {
  transform: rotate(180deg);
}

.faq-toggle {
  transition: var(--transition);
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px 0;
  margin-top: 80px;
  background: rgba(7, 9, 14, 0.95);
}

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

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: #fff;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}