/* ============================
   Aura Landing Page — Styles
   Premium editorial feel, Hinge-inspired
   ============================ */

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

:root {
  --purple-deep: #6B4C9A;
  --purple-mid: #8B6BBF;
  --purple-light: #C4B5E0;
  --purple-pale: #EDE8F5;
  --purple-ghost: #F6F3FA;
  --dark: #1A1A2E;
  --dark-soft: #2D2B55;
  --text: #1A1A2E;
  --text-secondary: #5A5775;
  --text-muted: #8E8E9A;
  --warm-bg: #FAF8F5;
  --white: #FFFFFF;
  --border: rgba(107, 76, 154, 0.1);
  --accent: #FF6B35;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* Typography */
h1, h2, h3 {
  font-family: 'Playfair Display', Georgia, 'Times New Roman', serif;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 em, h2 em {
  font-style: italic;
  font-weight: 400;
}

/* ============================
   Navigation
   ============================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 600;
  color: var(--purple-deep);
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  transition: color 0.2s;
}

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

/* ============================
   Hero
   ============================ */
.hero {
  min-height: 100vh;
  padding: 140px 40px 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--purple-deep);
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(42px, 5.5vw, 68px);
  color: var(--dark);
  margin-bottom: 24px;
  line-height: 1.08;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 460px;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  background: var(--purple-deep);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  border-radius: 100px;
  letter-spacing: 0.01em;
  transition: all 0.25s ease;
}

.btn-primary:hover {
  background: var(--dark-soft);
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(107, 76, 154, 0.25);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  border-color: var(--purple-deep);
  color: var(--purple-deep);
}

.btn-large {
  padding: 20px 48px;
  font-size: 17px;
}

/* Hero Visual */
.hero-visual {
  flex: 0 0 auto;
}

.hero-card {
  width: 300px;
  background: var(--white);
  border-radius: 24px;
  padding: 32px 28px;
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.02),
    0 12px 40px rgba(107, 76, 154, 0.1),
    0 0 0 1px var(--border);
}

.hero-card-wave {
  margin-bottom: 20px;
}

.waveform-svg {
  width: 100%;
  height: 60px;
}

.waveform-bars rect {
  fill: var(--purple-deep);
  opacity: 0.7;
  animation: wave-pulse 2s ease-in-out infinite alternate;
}

.waveform-bars rect:nth-child(odd) {
  animation-delay: 0.15s;
  opacity: 0.5;
}

.waveform-bars rect:nth-child(3n) {
  animation-delay: 0.3s;
  opacity: 0.85;
}

@keyframes wave-pulse {
  0% { transform: scaleY(1); }
  100% { transform: scaleY(0.6); }
}

.hero-card-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.hero-card-name {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 500;
  color: var(--dark);
}

.hero-card-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--purple-deep);
  background: var(--purple-pale);
  padding: 4px 12px;
  border-radius: 100px;
}

.hero-card-chemistry {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.chemistry-score {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 600;
  color: var(--purple-deep);
}

.chemistry-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================
   Sections — General
   ============================ */
.section {
  padding: 120px 40px;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-light {
  background: var(--white);
}

.section-purple {
  background: var(--dark);
}

.section-warm {
  background: var(--warm-bg);
}

.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--purple-deep);
  margin-bottom: 16px;
}

.section-eyebrow-light {
  color: var(--purple-light);
}

.section-headline {
  font-size: clamp(34px, 4vw, 52px);
  color: var(--dark);
  margin-bottom: 48px;
}

.section-headline-light {
  color: var(--white);
}

/* ============================
   How It Works — Steps Grid
   ============================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 64px;
}

.step {
  padding: 32px 0;
}

.step-number {
  font-family: 'Playfair Display', serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--purple-deep);
  margin-bottom: 16px;
  opacity: 0.6;
}

.step-title {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--dark);
}

.step-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ============================
   Split Sections
   ============================ */
.section-split {
  display: flex;
  align-items: center;
  gap: 80px;
}

.section-split-reverse {
  flex-direction: row-reverse;
}

.split-text {
  flex: 1;
}

.split-body {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 480px;
}

.section-purple .split-body {
  color: rgba(255, 255, 255, 0.7);
}

.split-visual {
  flex: 0 0 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Voice Demo */
.voice-demo {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.voice-demo-circle {
  width: 80px;
  height: 80px;
  background: var(--purple-deep);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.mic-icon {
  width: 28px;
  height: 28px;
  color: var(--white);
}

.voice-demo-waves {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wave-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid var(--purple-light);
  opacity: 0;
  animation: wave-expand 3s ease-out infinite;
}

.wave-ring-1 {
  width: 100px;
  height: 100px;
  animation-delay: 0s;
}

.wave-ring-2 {
  width: 140px;
  height: 140px;
  animation-delay: 1s;
}

.wave-ring-3 {
  width: 180px;
  height: 180px;
  animation-delay: 2s;
}

@keyframes wave-expand {
  0% { opacity: 0.6; transform: scale(0.8); }
  100% { opacity: 0; transform: scale(1.2); }
}

/* Pod Date Demo */
.pod-demo {
  background: var(--white);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.02),
    0 12px 40px rgba(107, 76, 154, 0.08);
  text-align: center;
  width: 320px;
}

.pod-timer {
  font-family: 'Inter', sans-serif;
  font-size: 36px;
  font-weight: 300;
  color: var(--purple-deep);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.pod-avatars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 28px;
}

.pod-avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.pod-avatar-pulse {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--purple-pale);
  animation: pod-pulse 2s ease-in-out infinite;
}

.pod-avatar-you .pod-avatar-pulse {
  background: var(--purple-light);
}

.pod-avatar-pulse-delay {
  animation-delay: 1s;
}

@keyframes pod-pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.08); opacity: 1; }
}

.pod-connection-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--purple-light), var(--purple-pale));
  border-radius: 1px;
}

.pod-prompt {
  font-family: 'Playfair Display', serif;
  font-size: 15px;
  font-style: italic;
  color: var(--text-secondary);
  padding: 16px;
  background: var(--purple-ghost);
  border-radius: 12px;
  line-height: 1.5;
}

/* ============================
   Chemistry Score Section
   ============================ */
.center-content {
  text-align: center;
}

.center-content .section-headline {
  margin-left: auto;
  margin-right: auto;
}

.center-body {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 56px;
}

.chemistry-demo {
  display: flex;
  justify-content: center;
}

.chem-card {
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--white);
  border-radius: 24px;
  padding: 40px 48px;
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.02),
    0 12px 40px rgba(107, 76, 154, 0.08);
}

.chem-ring {
  position: relative;
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}

.chem-ring-svg {
  width: 120px;
  height: 120px;
  transform: rotate(-90deg);
}

.chem-ring-bg {
  fill: none;
  stroke: var(--purple-pale);
}

.chem-ring-fill {
  fill: none;
  stroke: var(--purple-deep);
  stroke-linecap: round;
  stroke-dasharray: calc(2 * 3.14159 * 52);
  stroke-dashoffset: calc(2 * 3.14159 * 52 * (1 - var(--percent) / 100));
  transition: stroke-dashoffset 1.5s ease;
}

.chem-ring-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 600;
  color: var(--purple-deep);
}

.chem-traits {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 200px;
}

.chem-trait {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.chem-trait-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: left;
}

.chem-trait-bar {
  height: 6px;
  background: var(--purple-pale);
  border-radius: 3px;
  overflow: hidden;
}

.chem-trait-fill {
  height: 100%;
  background: var(--purple-deep);
  border-radius: 3px;
  transition: width 1s ease;
}

/* ============================
   Testimonial
   ============================ */
.testimonial {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 0;
}

.testimonial-text {
  font-family: 'Playfair Display', serif;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  font-style: italic;
  line-height: 1.5;
  color: var(--dark);
  margin-bottom: 24px;
}

.testimonial-cite {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 500;
  font-style: normal;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ============================
   CTA Section
   ============================ */
.section-cta {
  background: var(--dark);
  padding: 140px 40px;
}

.cta-headline {
  font-size: clamp(36px, 4.5vw, 56px);
  color: var(--white);
  margin-bottom: 20px;
}

.cta-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 40px;
}

.cta-buttons {
  margin-bottom: 16px;
}

.section-cta .btn-primary {
  background: var(--white);
  color: var(--dark);
}

.section-cta .btn-primary:hover {
  background: var(--purple-pale);
  color: var(--purple-deep);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
}

.cta-platforms {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  font-weight: 500;
}

/* ============================
   Footer
   ============================ */
.footer {
  background: var(--dark);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 40px 40px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand {
  margin-bottom: 48px;
}

.footer-logo {
  font-family: 'Playfair Display', serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--white);
  display: inline-block;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-links {
  display: flex;
  gap: 80px;
  margin-bottom: 56px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.3);
}

/* ============================
   Responsive
   ============================ */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 120px 24px 60px;
    gap: 48px;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
    flex-wrap: wrap;
  }

  .section {
    padding: 80px 24px;
  }

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

  .section-split,
  .section-split-reverse {
    flex-direction: column;
    gap: 48px;
  }

  .split-visual {
    flex: 0 0 auto;
  }

  .split-body {
    max-width: 100%;
  }

  .chem-card {
    flex-direction: column;
    gap: 32px;
    padding: 32px;
  }

  .footer-links {
    flex-direction: column;
    gap: 32px;
  }

  .nav-inner {
    padding: 0 24px;
  }

  .section-cta {
    padding: 80px 24px;
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: 20px;
  }

  .nav-links a {
    font-size: 13px;
  }

  .hero-card {
    width: 260px;
    padding: 24px 20px;
  }

  .pod-demo {
    width: 280px;
    padding: 24px;
  }

  .btn-primary {
    padding: 14px 28px;
    font-size: 14px;
  }

  .btn-secondary {
    padding: 14px 24px;
    font-size: 14px;
  }
}