/*
Theme Name: VoiceAlexa English Tutor
Theme URI: https://voicealexa.com
Author: VoiceAlexa
Description: Modern landing page for English Tutor AI Bot
Version: 1.1
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Manrope:wght@400;500;600;700&display=swap');

:root {
    --bg-dark: #05070a;
    --bg-card: #0d1117;
    --accent-voice: #10b981;
    --accent-secondary: #06b6d4;
    --accent-primary: #7c3aed;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --gradient-voice: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #7c3aed 100%);
    --glow-voice: 0 0 80px rgba(16, 185, 129, 0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Manrope', sans-serif; background: var(--bg-dark); color: var(--text-primary); line-height: 1.7; overflow-x: hidden; }
h1, h2, h3, h4, h5, h6 { font-family: 'Outfit', sans-serif; font-weight: 700; line-height: 1.15; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Background */
.bg-gradient { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; background: radial-gradient(ellipse at 20% 20%, rgba(16, 185, 129, 0.12) 0%, transparent 50%), radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%); }
.bg-gradient::before { content: ''; position: absolute; width: 800px; height: 800px; background: var(--gradient-voice); border-radius: 50%; filter: blur(150px); opacity: 0.12; top: -400px; right: -200px; animation: morphBlob 25s infinite ease-in-out; }
@keyframes morphBlob { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(50px, -50px) scale(1.1); } }

/* Navigation */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 20px 0; transition: all 0.4s ease; }
.nav.scrolled { background: rgba(5, 7, 10, 0.9); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(255,255,255,0.05); }
.nav-inner { display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: 'Outfit', sans-serif; font-size: 1.6rem; font-weight: 800; background: var(--gradient-voice); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-decoration: none; display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 36px; height: 36px; background: var(--gradient-voice); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; -webkit-text-fill-color: white; }
.nav-links { display: flex; gap: 40px; list-style: none; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--text-primary); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px; border-radius: 14px; font-family: 'Outfit', sans-serif; font-weight: 600; text-decoration: none; transition: all 0.4s ease; cursor: pointer; border: none; font-size: 1rem; }
.btn-primary { background: var(--gradient-voice); color: white; box-shadow: var(--glow-voice); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 100px rgba(16, 185, 129, 0.5); }
.btn-secondary { background: rgba(255,255,255,0.05); color: var(--text-primary); border: 1px solid rgba(255,255,255,0.1); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.btn-large { padding: 18px 36px; font-size: 1.1rem; }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 140px 0 100px; }
.hero-content { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 10px; padding: 10px 20px; background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.3); border-radius: 50px; font-size: 0.9rem; color: var(--accent-voice); margin-bottom: 28px; font-weight: 500; }
.hero-badge .mic-icon { animation: micPulse 2s infinite; }
@keyframes micPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.2); } }
.hero h1 { font-size: clamp(2.8rem, 5.5vw, 4.2rem); margin-bottom: 28px; font-weight: 800; }
.hero h1 .highlight { background: var(--gradient-voice); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.voice-wave { display: inline-flex; align-items: center; gap: 4px; height: 40px; margin-left: 12px; vertical-align: middle; }
.voice-wave span { width: 5px; background: var(--gradient-voice); border-radius: 5px; animation: waveBar 1s infinite ease-in-out; }
.voice-wave span:nth-child(1) { height: 18px; animation-delay: 0s; }
.voice-wave span:nth-child(2) { height: 32px; animation-delay: 0.1s; }
.voice-wave span:nth-child(3) { height: 24px; animation-delay: 0.2s; }
.voice-wave span:nth-child(4) { height: 38px; animation-delay: 0.3s; }
.voice-wave span:nth-child(5) { height: 28px; animation-delay: 0.4s; }
@keyframes waveBar { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(0.4); } }
.hero-text { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 40px; max-width: 520px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 50px; }
.hero-stats { display: flex; gap: 40px; }
.hero-stat { display: flex; align-items: center; gap: 12px; }
.hero-stat-icon { width: 44px; height: 44px; background: rgba(16, 185, 129, 0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.hero-stat-text h4 { font-size: 1.1rem; font-weight: 700; }
.hero-stat-text p { font-size: 0.85rem; color: var(--text-muted); }

/* Phone Mockup */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone-glow { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 350px; height: 350px; background: var(--gradient-voice); border-radius: 50%; filter: blur(100px); opacity: 0.25; animation: glowPulse 4s infinite; }
@keyframes glowPulse { 0%, 100% { opacity: 0.25; } 50% { opacity: 0.4; } }
.phone-mockup { position: relative; width: 280px; height: 580px; background: linear-gradient(145deg, #1a1f2e 0%, #0d1117 100%); border-radius: 44px; border: 3px solid rgba(255,255,255,0.1); padding: 12px; box-shadow: 0 60px 120px rgba(0,0,0,0.6); animation: phoneFloat 8s ease-in-out infinite; z-index: 1; }
@keyframes phoneFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
.phone-notch { position: absolute; top: 18px; left: 50%; transform: translateX(-50%); width: 100px; height: 28px; background: #000; border-radius: 20px; z-index: 10; }
.phone-screen { width: 100%; height: 100%; background: linear-gradient(180deg, #0d1117 0%, #161b22 100%); border-radius: 34px; padding: 50px 16px 20px; overflow: hidden; display: flex; flex-direction: column; }
.chat-header { display: flex; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,0.05); margin-bottom: 20px; }
.chat-avatar { width: 40px; height: 40px; background: var(--gradient-voice); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.chat-info h4 { font-size: 0.95rem; font-weight: 600; }
.chat-info p { font-size: 0.75rem; color: var(--accent-voice); }
.chat-messages { flex: 1; display: flex; flex-direction: column; gap: 12px; }
.chat-bubble { padding: 14px 16px; border-radius: 18px; max-width: 90%; font-size: 0.85rem; line-height: 1.5; animation: bubbleFadeIn 0.6s ease forwards; opacity: 0; }
@keyframes bubbleFadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
.chat-bubble.bot { background: rgba(124, 58, 237, 0.15); border: 1px solid rgba(124, 58, 237, 0.2); margin-right: auto; border-bottom-left-radius: 6px; animation-delay: 0.3s; }
.chat-bubble.voice { display: flex; align-items: center; gap: 12px; background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%); border: 1px solid rgba(16, 185, 129, 0.3); margin-left: auto; border-bottom-right-radius: 6px; animation-delay: 0.8s; }
.voice-indicator { display: flex; align-items: center; gap: 3px; }
.voice-indicator span { width: 4px; background: var(--accent-voice); border-radius: 4px; animation: voiceWave 0.8s infinite ease-in-out; }
.voice-indicator span:nth-child(1) { height: 10px; animation-delay: 0s; }
.voice-indicator span:nth-child(2) { height: 18px; animation-delay: 0.1s; }
.voice-indicator span:nth-child(3) { height: 14px; animation-delay: 0.2s; }
.voice-indicator span:nth-child(4) { height: 20px; animation-delay: 0.3s; }
.voice-indicator span:nth-child(5) { height: 12px; animation-delay: 0.4s; }
@keyframes voiceWave { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(0.4); } }
.chat-bubble.correction { background: rgba(6, 182, 212, 0.1); border: 1px solid rgba(6, 182, 212, 0.25); margin-right: auto; border-bottom-left-radius: 6px; animation-delay: 1.3s; }
.chat-bubble s { color: #f87171; }
.chat-bubble b { color: var(--accent-voice); }

/* Voice Banner */
.voice-banner { padding: 80px 0; background: linear-gradient(180deg, transparent 0%, rgba(16, 185, 129, 0.03) 50%, transparent 100%); }
.voice-banner-content { display: flex; align-items: center; justify-content: center; gap: 40px; flex-wrap: wrap; }
.voice-feature-pill { display: flex; align-items: center; gap: 14px; padding: 18px 28px; background: rgba(16, 185, 129, 0.05); border: 1px solid rgba(16, 185, 129, 0.15); border-radius: 100px; transition: all 0.3s; }
.voice-feature-pill:hover { background: rgba(16, 185, 129, 0.1); transform: translateY(-3px); box-shadow: 0 10px 40px rgba(16, 185, 129, 0.15); }
.voice-feature-pill .icon { width: 44px; height: 44px; background: var(--gradient-voice); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.voice-feature-pill h4 { font-size: 1rem; margin-bottom: 2px; }
.voice-feature-pill p { font-size: 0.8rem; color: var(--text-secondary); }

/* Stats */
.stats { padding: 60px 0; border-top: 1px solid rgba(255,255,255,0.03); border-bottom: 1px solid rgba(255,255,255,0.03); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-item { text-align: center; padding: 30px; background: rgba(255,255,255,0.02); border-radius: 20px; border: 1px solid rgba(255,255,255,0.03); transition: all 0.4s; }
.stat-item:hover { background: rgba(16, 185, 129, 0.05); border-color: rgba(16, 185, 129, 0.2); transform: translateY(-5px); }
.stat-item h3 { font-size: 2.6rem; font-weight: 800; background: var(--gradient-voice); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 8px; }
.stat-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* Features */
.features { padding: 120px 0; }
.section-header { text-align: center; max-width: 650px; margin: 0 auto 70px; }
.section-label { display: inline-flex; padding: 8px 18px; background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2); border-radius: 50px; font-size: 0.85rem; color: var(--accent-voice); font-weight: 500; margin-bottom: 20px; }
.section-header h2 { font-size: clamp(2.2rem, 4vw, 3rem); margin-bottom: 20px; }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--bg-card); border: 1px solid rgba(255,255,255,0.04); border-radius: 24px; padding: 36px; transition: all 0.5s; position: relative; overflow: hidden; }
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient-voice); transform: scaleX(0); transition: transform 0.5s; }
.feature-card:hover { transform: translateY(-10px); border-color: rgba(16, 185, 129, 0.3); box-shadow: 0 30px 60px rgba(0,0,0,0.3); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon { width: 60px; height: 60px; background: rgba(16, 185, 129, 0.1); border-radius: 18px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 24px; transition: all 0.4s; }
.feature-card:hover .feature-icon { background: var(--gradient-voice); transform: scale(1.1); }
.feature-card h3 { font-size: 1.2rem; margin-bottom: 12px; font-weight: 600; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* Voice Demo */
.voice-demo { padding: 120px 0; background: var(--bg-card); }
.voice-demo-content { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.waveform-container { background: var(--bg-dark); border: 1px solid rgba(255,255,255,0.05); border-radius: 24px; padding: 50px 40px; }
.waveform { display: flex; align-items: center; justify-content: center; gap: 5px; height: 120px; }
.waveform span { width: 8px; background: var(--gradient-voice); border-radius: 8px; animation: bigWave 1.2s infinite ease-in-out; }
.waveform span:nth-child(1) { height: 25px; animation-delay: 0s; }
.waveform span:nth-child(2) { height: 50px; animation-delay: 0.1s; }
.waveform span:nth-child(3) { height: 35px; animation-delay: 0.2s; }
.waveform span:nth-child(4) { height: 80px; animation-delay: 0.3s; }
.waveform span:nth-child(5) { height: 60px; animation-delay: 0.4s; }
.waveform span:nth-child(6) { height: 95px; animation-delay: 0.5s; }
.waveform span:nth-child(7) { height: 45px; animation-delay: 0.6s; }
.waveform span:nth-child(8) { height: 70px; animation-delay: 0.7s; }
.waveform span:nth-child(9) { height: 30px; animation-delay: 0.8s; }
.waveform span:nth-child(10) { height: 55px; animation-delay: 0.9s; }
@keyframes bigWave { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(0.3); } }
.waveform-label { text-align: center; margin-top: 24px; color: var(--text-muted); font-size: 0.9rem; }
.voice-demo-text h2 { font-size: clamp(2rem, 3.5vw, 2.6rem); margin-bottom: 24px; }
.voice-demo-text p { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 32px; line-height: 1.8; }
.voice-demo-list { list-style: none; }
.voice-demo-list li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 1rem; }
.voice-demo-list li:last-child { border-bottom: none; }
.voice-demo-list li::before { content: '✓'; width: 28px; height: 28px; background: rgba(16, 185, 129, 0.15); color: var(--accent-voice); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: bold; }

/* How It Works */
.how-it-works { padding: 120px 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.step { text-align: center; padding: 40px 30px; background: var(--bg-card); border: 1px solid rgba(255,255,255,0.04); border-radius: 24px; transition: all 0.4s; }
.step:hover { transform: translateY(-8px); border-color: rgba(16, 185, 129, 0.3); }
.step-number { width: 70px; height: 70px; background: var(--bg-dark); border: 3px solid var(--accent-voice); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Outfit', sans-serif; font-size: 1.5rem; font-weight: 800; margin: 0 auto 24px; transition: all 0.4s; }
.step:hover .step-number { background: var(--gradient-voice); border-color: transparent; }
.step h3 { font-size: 1.25rem; margin-bottom: 14px; }
.step p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* Pricing */
.pricing { padding: 120px 0; background: var(--bg-card); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 1050px; margin: 0 auto; }
.pricing-card { background: var(--bg-dark); border: 1px solid rgba(255,255,255,0.04); border-radius: 28px; padding: 44px; text-align: center; transition: all 0.5s; }
.pricing-card.featured { background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--bg-dark) 100%); border-color: var(--accent-voice); transform: scale(1.05); box-shadow: var(--glow-voice); }
.pricing-card:hover { transform: translateY(-8px); border-color: rgba(16, 185, 129, 0.4); }
.pricing-card.featured:hover { transform: scale(1.05) translateY(-8px); }
.pricing-label { display: inline-block; padding: 8px 20px; background: var(--gradient-voice); border-radius: 50px; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 20px; }
.pricing-card h3 { font-size: 1.3rem; margin-bottom: 20px; font-weight: 600; }
.price { font-family: 'Outfit', sans-serif; font-size: 3.5rem; font-weight: 800; margin-bottom: 8px; }
.price span { font-size: 1.1rem; font-weight: 500; color: var(--text-secondary); }
.price-period { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 36px; }
.pricing-features { list-style: none; margin-bottom: 36px; text-align: left; }
.pricing-features li { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,0.04); display: flex; align-items: center; gap: 14px; color: var(--text-secondary); font-size: 0.95rem; }
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li::before { content: '✓'; color: var(--accent-voice); font-weight: bold; }

/* CTA */
.cta { padding: 120px 0; }
.cta-box { background: var(--gradient-voice); border-radius: 36px; padding: 90px 50px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23fff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
.cta-content { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(2.2rem, 4vw, 3rem); margin-bottom: 20px; }
.cta p { font-size: 1.25rem; opacity: 0.9; margin-bottom: 40px; max-width: 550px; margin-left: auto; margin-right: auto; }
.cta .btn { background: white; color: #059669; font-weight: 700; }
.cta .btn:hover { transform: translateY(-4px); box-shadow: 0 20px 50px rgba(0,0,0,0.3); }

/* Footer */
.footer { padding: 60px 0 30px; border-top: 1px solid rgba(255,255,255,0.04); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
.footer-links { display: flex; gap: 36px; list-style: none; }
.footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.95rem; transition: color 0.3s; }
.footer-links a:hover { color: var(--accent-voice); }
.copyright { color: var(--text-muted); font-size: 0.9rem; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; gap: 60px; }
    .hero-text { margin: 0 auto 40px; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-visual { order: -1; }
    .voice-demo-content { grid-template-columns: 1fr; gap: 60px; }
    .voice-demo-text { text-align: center; }
    .voice-demo-list { max-width: 350px; margin: 0 auto; text-align: left; }
}
@media (max-width: 968px) {
    .nav-links { display: none; }
    .nav-inner { justify-content: space-between; }
    .nav .btn { padding: 10px 18px; font-size: 0.85rem; white-space: nowrap; }
    .phone-mockup { width: 260px; height: 530px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid, .steps, .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin-left: auto; margin-right: auto; }
    .pricing-card.featured { transform: none; }
    .voice-banner-content { flex-direction: column; align-items: center; }
    .voice-feature-pill { width: 100%; max-width: 320px; justify-content: center; }
    .footer-inner { flex-direction: column; gap: 28px; text-align: center; }
    .footer-links { justify-content: center; }
    .section-header { padding: 0 10px; }
    .step { padding: 30px 20px; }
    .feature-card { padding: 28px 24px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .nav { padding: 12px 0; }
    .nav-inner { gap: 10px; }
    .nav .btn { padding: 10px 14px; font-size: 0.75rem; gap: 4px; border-radius: 10px; flex-shrink: 0; }
    .logo { font-size: 1.2rem; gap: 8px; }
    .logo-icon { width: 28px; height: 28px; font-size: 0.9rem; border-radius: 8px; }
    .hero { padding: 100px 0 60px; }
    .hero-content { gap: 40px; }
    .hero-badge { padding: 8px 14px; font-size: 0.8rem; }
    .hero h1 { font-size: 2rem; }
    .voice-wave { height: 28px; margin-left: 8px; }
    .voice-wave span { width: 3px; }
    .hero-text { font-size: 1rem; margin-bottom: 30px; }
    .hero-buttons { flex-direction: column; width: 100%; }
    .hero-buttons .btn { width: 100%; justify-content: center; }
    .nav .btn { width: auto; }
    .btn-large { padding: 14px 24px; font-size: 1rem; }
    .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
    .hero-stat { width: 100%; max-width: 200px; justify-content: center; }
    .phone-mockup { width: 220px; height: 450px; border-radius: 36px; }
    .phone-notch { width: 80px; height: 24px; top: 14px; }
    .phone-screen { padding: 42px 12px 16px; border-radius: 28px; }
    .chat-bubble { padding: 10px 12px; font-size: 0.8rem; }
    .voice-banner { padding: 50px 0; }
    .voice-feature-pill { padding: 14px 20px; }
    .voice-feature-pill .icon { width: 38px; height: 38px; font-size: 1rem; }
    .voice-feature-pill h4 { font-size: 0.9rem; }
    .voice-feature-pill p { font-size: 0.75rem; }
    .stats { padding: 40px 0; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .stat-item { padding: 20px 16px; }
    .stat-item h3 { font-size: 2rem; }
    .stat-item p { font-size: 0.8rem; }
    .features, .voice-demo, .how-it-works, .pricing { padding: 80px 0; }
    .section-header { margin-bottom: 50px; }
    .section-header h2 { font-size: 1.8rem; }
    .section-header p { font-size: 1rem; }
    .section-label { font-size: 0.8rem; padding: 6px 14px; }
    .features-grid, .steps, .pricing-grid { max-width: 100%; }
    .feature-card { padding: 24px 20px; }
    .feature-icon { width: 50px; height: 50px; font-size: 1.3rem; margin-bottom: 18px; }
    .feature-card h3 { font-size: 1.1rem; }
    .feature-card p { font-size: 0.9rem; }
    .waveform-container { padding: 30px 20px; }
    .waveform { height: 80px; }
    .waveform span { width: 5px; }
    .voice-demo-text h2 { font-size: 1.6rem; }
    .voice-demo-text p { font-size: 1rem; }
    .voice-demo-list li { font-size: 0.9rem; padding: 12px 0; }
    .step { padding: 28px 18px; }
    .step-number { width: 56px; height: 56px; font-size: 1.2rem; }
    .step h3 { font-size: 1.1rem; }
    .step p { font-size: 0.9rem; }
    .pricing-card { padding: 32px 24px; }
    .pricing-card .btn { width: 100%; justify-content: center; }
    .pricing-card h3 { font-size: 1.15rem; }
    .price { font-size: 2.8rem; }
    .pricing-features li { font-size: 0.9rem; padding: 12px 0; }
    .cta { padding: 80px 0; }
    .cta-box { padding: 50px 20px; border-radius: 24px; }
    .cta .btn { width: 100%; max-width: 320px; justify-content: center; }
    .cta h2 { font-size: 1.6rem; }
    .cta p { font-size: 1rem; margin-bottom: 30px; }
    .footer { padding: 40px 0 24px; }
    .footer-links { gap: 20px; flex-wrap: wrap; }
    .footer-links a { font-size: 0.85rem; }
    .copyright { font-size: 0.8rem; }
}