/*
 * Cunai Landing Page Styles
 * Uses brand tokens from ../palette.css
 */

/* ── Tokens ── */
:root {
  --primary-900: #1A1333;
  --primary-800: #2E2456;
  --primary-700: #3D3270;
  --primary-600: #4A3F6B;
  --primary-500: #6B5B95;
  --primary-400: #8B7FA8;
  --primary-300: #A89BBF;
  --primary-200: #C9BED9;
  --primary-100: #E8D8F0;
  --primary-50:  #F4EFFA;

  --secondary-500: #A8D8EA;
  --secondary-400: #BDE4F0;
  --secondary-300: #D0EDF5;
  --secondary-200: #E3F4F9;
  --secondary-100: #F0F9FC;

  --accent-600: #D4C060;
  --accent-500: #F5E6A3;
  --accent-400: #F8EDB8;
  --accent-300: #FAF2CC;
  --accent-200: #FCF7E0;

  --warm-500: #F8E8D0;

  --neutral-900: #1A1A2E;
  --neutral-800: #2D2D44;
  --neutral-700: #44445E;
  --neutral-600: #5E5E78;
  --neutral-500: #7A7A92;
  --neutral-400: #9A9AAE;
  --neutral-300: #B8B8C8;
  --neutral-200: #D6D6E0;
  --neutral-100: #ECECF2;
  --neutral-50:  #F6F6FA;

  --success: #7BC67E;
  --warning: #F5D76E;
  --error: #E87461;

  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-body: -apple-system, 'Helvetica Neue', Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(26,19,51,0.08);
  --shadow-md: 0 4px 16px rgba(26,19,51,0.1);
  --shadow-lg: 0 8px 32px rgba(26,19,51,0.14);
  --shadow-xl: 0 16px 48px rgba(26,19,51,0.18);
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--neutral-800);
  background: var(--neutral-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
h1, h2, h3 { font-family: var(--font-heading); line-height: 1.2; }

/* ── Container ── */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn--sm { padding: 8px 20px; font-size: 0.85rem; }
.btn--lg { padding: 14px 32px; font-size: 1rem; }
.btn--full { width: 100%; justify-content: center; }
.btn--accent {
  background: var(--accent-500);
  color: var(--primary-900);
  border-color: var(--accent-500);
}
.btn--accent:hover {
  background: var(--accent-400);
  border-color: var(--accent-400);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--outline {
  background: transparent;
  color: var(--primary-500);
  border-color: var(--primary-200);
}
.btn--outline:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
}
.btn--ghost {
  background: rgba(255,255,255,0.1);
  color: var(--primary-100);
  border-color: rgba(255,255,255,0.2);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.18);
}

/* ── Language Switch ── */
.lang-switch {
  display: flex;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}
.lang-switch__btn {
  background: none;
  border: none;
  color: var(--primary-400);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.5px;
  font-family: var(--font-body);
}
.lang-switch__btn:hover {
  color: var(--primary-100);
}
.lang-switch__btn--active {
  background: rgba(245,230,163,0.2);
  color: var(--accent-500);
}
.nav__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26,19,51,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary-100);
  letter-spacing: 2px;
}
.nav__links {
  display: flex;
  gap: 32px;
}
.nav__links a {
  color: var(--primary-300);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--accent-500); }

/* ── Hero ── */
.hero {
  position: relative;
  background: linear-gradient(170deg, var(--primary-900) 0%, var(--primary-800) 50%, var(--primary-700) 100%);
  padding: 140px 0 80px;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero__bg { position: absolute; inset: 0; }
.star {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-500);
  border-radius: 50%;
  animation: twinkle 3s ease-in-out infinite alternate;
}
.star--1 { top: 12%; left: 8%; animation-delay: 0s; }
.star--2 { top: 20%; left: 25%; animation-delay: 0.5s; width: 2px; height: 2px; }
.star--3 { top: 8%; left: 55%; animation-delay: 1s; }
.star--4 { top: 30%; left: 75%; animation-delay: 1.5s; width: 2px; height: 2px; }
.star--5 { top: 15%; left: 90%; animation-delay: 0.3s; }
.star--6 { top: 45%; left: 5%; animation-delay: 0.8s; width: 2px; height: 2px; }
.star--7 { top: 55%; left: 35%; animation-delay: 1.2s; width: 2px; height: 2px; }
.star--8 { top: 10%; left: 42%; animation-delay: 2s; }
@keyframes twinkle { 0% { opacity: 0.3; } 100% { opacity: 1; } }

.hero__content {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero__badge {
  display: inline-block;
  background: rgba(245,230,163,0.15);
  color: var(--accent-500);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
  border: 1px solid rgba(245,230,163,0.2);
}
.hero h1 {
  font-size: 3.2rem;
  color: var(--primary-50);
  margin-bottom: 20px;
}
.highlight {
  color: var(--accent-500);
}
.hero__sub {
  color: var(--primary-300);
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.hero__trust {
  color: var(--primary-400);
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}
.hero__wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
}
.hero__wave svg { display: block; width: 100%; height: 80px; }

/* Phone mockup */
.phone {
  width: 300px;
  margin: 0 auto;
  background: var(--neutral-900);
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow-xl), 0 0 80px rgba(107,91,149,0.3);
}
.phone__notch {
  width: 120px;
  height: 28px;
  background: var(--neutral-900);
  border-radius: 0 0 16px 16px;
  margin: 0 auto;
  position: relative;
  top: -1px;
  z-index: 2;
}
.phone__screen {
  background: #ECE5DD;
  border-radius: 26px;
  overflow: hidden;
  min-height: 440px;
}
.chat__header {
  background: #075E54;
  color: white;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
}
.chat__avatar {
  width: 36px;
  height: 36px;
  background: var(--primary-800);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.chat__avatar img { width: 28px; height: 28px; }
.chat__name { font-size: 0.9rem; font-weight: 600; }
.chat__status { font-size: 0.7rem; opacity: 0.8; }
.chat__messages { padding: 16px 10px; display: flex; flex-direction: column; gap: 8px; }

.msg {
  max-width: 85%;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  line-height: 1.5;
}
.msg--bot {
  background: white;
  color: var(--neutral-800);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}
.msg--user {
  background: #DCF8C6;
  color: var(--neutral-800);
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

/* ── Stats ── */
.stats {
  background: var(--neutral-50);
  padding: 48px 0;
}
.stats__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: bold;
  color: var(--primary-500);
}
.stat__label {
  display: block;
  font-size: 0.85rem;
  color: var(--neutral-500);
  margin-top: 4px;
}

/* ── Section header ── */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary-500);
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 2.2rem;
  color: var(--primary-900);
  margin-bottom: 12px;
}
.section-header p {
  color: var(--neutral-500);
  font-size: 1.05rem;
}

/* ── Features ── */
.features {
  padding: 100px 0;
  background: var(--neutral-50);
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.25s ease;
  border: 1px solid var(--neutral-100);
  position: relative;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-100);
}
.feature-card--highlight {
  grid-column: span 1;
  background: linear-gradient(135deg, var(--primary-800), var(--primary-700));
  color: var(--primary-100);
  border: none;
}
.feature-card--highlight:hover { border-color: transparent; }
.feature-card--highlight h3 { color: var(--accent-500); }
.feature-card--highlight p { color: var(--primary-200); }
.feature-card--highlight .feature-card__icon { background: rgba(245,230,163,0.15); }
.feature-card--highlight .feature-card__icon svg { stroke: var(--accent-500); }
.feature-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-card__icon svg { stroke: var(--primary-500); }
.feature-card h3 {
  font-size: 1.1rem;
  color: var(--primary-900);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--neutral-600);
  line-height: 1.6;
}
.feature-card__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(245,230,163,0.2);
  color: var(--accent-500);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

/* ── How it works ── */
.how {
  padding: 100px 0;
  background: white;
}
.steps {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  width: 100%;
}
.step__number {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50%;
  background: var(--primary-500);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: bold;
}
.step__content h3 {
  font-size: 1.15rem;
  color: var(--primary-900);
  margin-bottom: 6px;
}
.step__content p {
  font-size: 0.92rem;
  color: var(--neutral-600);
  line-height: 1.6;
}
.step__line {
  width: 2px;
  height: 40px;
  background: var(--primary-100);
  margin: 8px 0 8px 23px;
}

/* ── Science ── */
.science {
  padding: 100px 0;
  background: var(--primary-900);
  color: var(--primary-100);
}
.science .section-tag { color: var(--accent-500); }
.science__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.science h2 {
  font-size: 2rem;
  color: var(--primary-50);
  margin-bottom: 16px;
}
.science__text p {
  color: var(--primary-300);
  margin-bottom: 32px;
}
.science__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.science__list li {
  padding-left: 20px;
  border-left: 3px solid var(--accent-500);
}
.science__list strong {
  display: block;
  color: var(--primary-50);
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.science__list span {
  font-size: 0.85rem;
  color: var(--primary-400);
}

.science__card {
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 24px;
}
.science__card-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-500);
  margin-bottom: 16px;
}
.science__bar {
  display: flex;
  border-radius: var(--radius-full);
  overflow: hidden;
  height: 44px;
  margin-bottom: 16px;
}
.science__bar-fill {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 600;
}
.science__bar-fill--base {
  background: var(--primary-500);
  color: white;
}
.science__bar-fill--personal {
  background: var(--accent-500);
  color: var(--primary-900);
}
.science__bar-fill span { white-space: nowrap; }
.science__card-note {
  font-size: 0.82rem;
  color: var(--primary-400);
}

.science__sources {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.science__sources span {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--primary-300);
}

/* ── Conversations ── */
.conversations {
  padding: 100px 0;
  background: var(--neutral-50);
}
.convos__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.convo-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--neutral-100);
  transition: all 0.25s ease;
}
.convo-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.convo-card__title {
  padding: 16px 24px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary-500);
  border-bottom: 1px solid var(--neutral-100);
}
.convo-card__msgs {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #ECE5DD;
}
.convo-card .msg { font-size: 0.85rem; }

/* ── Memories ── */
.memories {
  padding: 100px 0;
  background: white;
}
.memories__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.memories__text .section-tag { display: block; }
.memories__text h2 {
  font-size: 2rem;
  color: var(--primary-900);
  margin-bottom: 16px;
}
.memories__text > p {
  color: var(--neutral-600);
  margin-bottom: 32px;
  line-height: 1.7;
}
.memories__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.memories__list li {
  padding-left: 20px;
  border-left: 3px solid var(--secondary-500);
}
.memories__list strong {
  display: block;
  color: var(--primary-900);
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.memories__list span {
  font-size: 0.85rem;
  color: var(--neutral-600);
}

/* Memory timeline */
.memory-timeline {
  position: relative;
  padding-left: 24px;
}
.memory-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--secondary-500), var(--primary-300));
}
.memory-item {
  position: relative;
  margin-bottom: 24px;
}
.memory-item:last-child { margin-bottom: 0; }
.memory-item__dot {
  position: absolute;
  left: -20px;
  top: 16px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--secondary-500);
  border: 3px solid white;
  box-shadow: var(--shadow-sm);
}
.memory-item__card {
  background: var(--neutral-50);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--neutral-100);
  transition: all 0.2s ease;
}
.memory-item__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.memory-item__date {
  font-size: 0.75rem;
  color: var(--neutral-500);
  font-weight: 600;
}
.memory-item__category {
  display: inline-block;
  margin-left: 8px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary-500);
  background: var(--primary-50);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.memory-item__card p {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--neutral-800);
  line-height: 1.5;
}

/* ── Free banner ── */
.free-banner {
  padding: 64px 0;
  background: var(--accent-200);
}
.free-banner__inner {
  display: flex;
  align-items: center;
  gap: 32px;
}
.free-banner__icon {
  width: 72px;
  height: 72px;
  min-width: 72px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
}
.free-banner__icon svg { stroke: var(--accent-600); }
.free-banner__text {
  flex: 1;
}
.free-banner__text h3 {
  font-size: 1.4rem;
  color: var(--primary-900);
  margin-bottom: 4px;
}
.free-banner__text p {
  font-size: 0.92rem;
  color: var(--neutral-700);
  line-height: 1.6;
}

/* ── CTA ── */
.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-800), var(--primary-600));
  text-align: center;
}
.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.cta__icon { filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3)); }
.cta h2 {
  font-size: 2.2rem;
  color: var(--primary-50);
}
.cta p {
  color: var(--primary-300);
  font-size: 1.05rem;
  max-width: 480px;
  margin-bottom: 12px;
}

/* ── Footer ── */
.footer {
  padding: 32px 0;
  background: var(--primary-900);
  text-align: center;
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--primary-200);
  letter-spacing: 2px;
}
.footer__note {
  font-size: 0.8rem;
  color: var(--primary-400);
  max-width: 400px;
}
.footer__copy {
  font-size: 0.75rem;
  color: var(--neutral-600);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero h1 { font-size: 2.4rem; }
  .hero__sub { margin: 0 auto 32px; }
  .hero__actions { justify-content: center; }
  .hero__visual { order: -1; }
  .phone { width: 260px; }
  .phone__screen { min-height: 380px; }

  .nav__links { display: none; }
  .nav__right .btn { display: none; }

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

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

  .science__inner { grid-template-columns: 1fr; }

  .convos__grid { grid-template-columns: 1fr; }

  .memories__inner { grid-template-columns: 1fr; }
  .memories__visual { order: -1; }

  .free-banner__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
  .hero { padding: 100px 0 60px; }
  .hero h1 { font-size: 1.9rem; }
  .hero__sub { font-size: 1rem; }

  .stats__inner { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat__number { font-size: 1.8rem; }

  .features__grid { grid-template-columns: 1fr; }
  .feature-card { padding: 24px; }

  .section-header h2 { font-size: 1.7rem; }

  .cta h2 { font-size: 1.7rem; }

  .btn--lg { padding: 12px 24px; font-size: 0.9rem; }
}