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

:root {
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-primary: #f97316;
  --color-primary-dark: #ea580c;
  --color-accent: #3b82f6;
  --color-border: #e5e7eb;
  --radius: 16px;
  --radius-sm: 8px;
  --max-width: 1100px;
  --nav-height: 64px;
}

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav__actions { display: flex; align-items: center; gap: 12px; }
.lang-switch {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.lang-switch:hover { border-color: var(--color-primary); color: var(--color-primary); }
.nav__cta {
  background: var(--color-text);
  color: white;
  padding: 8px 20px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s;
}
.nav__cta:hover { background: #333; }

/* ── Section ── */
.section__title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.section__title--left { text-align: left; }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 40px) 24px 60px;
  background: linear-gradient(180deg, #fff8f0 0%, var(--color-bg) 100%);
}
.hero__content {
  max-width: var(--max-width);
  text-align: center;
}
.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
}
.hero__cta { margin-bottom: 60px; }
.hero__visual { display: flex; justify-content: center; }

/* Phone mockup */
.hero__phone {
  width: 240px;
  height: 480px;
  background: #1a1a1a;
  border-radius: 36px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.hero__screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  border-radius: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__demo { text-align: center; }
.demo__icon { font-size: 64px; margin-bottom: 16px; }
.demo__wave { display: flex; gap: 4px; justify-content: center; align-items: end; height: 40px; }
.demo__wave span {
  width: 4px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: wave 1.2s ease-in-out infinite;
}
.demo__wave span:nth-child(1) { height: 12px; animation-delay: 0s; }
.demo__wave span:nth-child(2) { height: 24px; animation-delay: 0.1s; }
.demo__wave span:nth-child(3) { height: 36px; animation-delay: 0.2s; }
.demo__wave span:nth-child(4) { height: 20px; animation-delay: 0.3s; }
.demo__wave span:nth-child(5) { height: 28px; animation-delay: 0.4s; }
.demo__wave span:nth-child(6) { height: 16px; animation-delay: 0.5s; }
.demo__wave span:nth-child(7) { height: 32px; animation-delay: 0.6s; }
.demo__wave span:nth-child(8) { height: 20px; animation-delay: 0.7s; }
.demo__wave span:nth-child(9) { height: 28px; animation-delay: 0.8s; }
.demo__wave span:nth-child(10) { height: 14px; animation-delay: 0.9s; }
@keyframes wave {
  0%, 100% { transform: scaleY(0.5); }
  50% { transform: scaleY(1); }
}

/* ── Button ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: var(--color-text);
  color: white;
  border-radius: 14px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.btn--primary { background: var(--color-text); }
.btn--large { padding: 20px 40px; font-size: 1.1rem; }
.btn__icon { width: 24px; height: 24px; }

/* ── Steps ── */
.steps {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 24px;
}
.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.step {
  text-align: center;
  padding: 40px 24px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  position: relative;
}
.step__number {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
}
.step__icon { font-size: 48px; margin-bottom: 16px; }
.step__title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.step__desc { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.6; }

/* ── Feature Highlight ── */
.feature-highlight {
  background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
  color: white;
  padding: 100px 24px;
}
.feature-highlight__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.feature-highlight__desc {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #d1d5db;
  margin-top: 20px;
}

/* Voice demo animation */
.voice-demo {
  text-align: center;
  padding: 60px;
}
.voice-demo__mic { font-size: 64px; margin-bottom: 24px; }
.voice-demo__waves { display: flex; gap: 8px; justify-content: center; margin-bottom: 20px; }
.voice-wave {
  width: 4px;
  height: 40px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: voiceWave 1.5s ease-in-out infinite;
}
.voice-wave:nth-child(1) { animation-delay: 0s; height: 20px; }
.voice-wave:nth-child(2) { animation-delay: 0.2s; height: 40px; }
.voice-wave:nth-child(3) { animation-delay: 0.4s; height: 30px; }
@keyframes voiceWave {
  0%, 100% { transform: scaleY(0.3); opacity: 0.5; }
  50% { transform: scaleY(1); opacity: 1; }
}
.voice-demo__label {
  font-size: 0.9rem;
  color: #9ca3af;
  font-weight: 600;
}

/* ── Pricing ── */
.pricing {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 24px;
}
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}
.pricing__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  position: relative;
}
.pricing__card--pro {
  border-color: var(--color-primary);
  box-shadow: 0 4px 24px rgba(249, 115, 22, 0.15);
}
.pricing__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
}
.pricing__name { font-size: 1.25rem; font-weight: 700; margin-bottom: 8px; }
.pricing__price {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}
.pricing__price small { font-size: 1rem; font-weight: 500; color: var(--color-text-muted); }
.pricing__features { list-style: none; }
.pricing__features li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.pricing__features li::before {
  content: '✓ ';
  color: var(--color-primary);
  font-weight: 700;
}

/* ── FAQ ── */
.faq {
  max-width: 700px;
  margin: 0 auto;
  padding: 100px 24px;
}
.faq__item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}
.faq__item summary {
  font-weight: 600;
  cursor: pointer;
  font-size: 1rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq__item summary::after { content: '+'; font-size: 1.5rem; color: var(--color-text-muted); }
.faq__item[open] summary::after { content: '−'; }
.faq__item p {
  margin-top: 12px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── Footer CTA ── */
.footer-cta {
  text-align: center;
  padding: 100px 24px;
  background: linear-gradient(180deg, var(--color-bg), #fff8f0);
}
.footer-cta__title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}
.footer-cta__desc {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-size: 1.1rem;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
}
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
}
.footer__links { display: flex; gap: 24px; }
.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.footer__links a:hover { color: var(--color-text); }
.footer__copy { font-size: 0.8rem; color: var(--color-text-muted); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .steps__grid { grid-template-columns: 1fr; gap: 24px; }
  .feature-highlight__inner { grid-template-columns: 1fr; text-align: center; }
  .section__title--left { text-align: center; }
  .pricing__grid { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; gap: 16px; text-align: center; }
  .footer__links { flex-wrap: wrap; justify-content: center; }
  .hero__phone { width: 200px; height: 400px; }
}