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

:root {
  --primary: #1a1a2e;
  --primary-light: #2a2a4e;
  --primary-dark: #0f0f1e;
  --accent: #eee852;
  --accent-dark: #d4cf3a;
  --dark: #1a1a2e;
  --dark-surface: #222240;
  --dark-card: #2a2a4a;
  --light: #f5f5f5;
  --white: #ffffff;
  --gray-100: #f0f0f5;
  --gray-200: #e0e0ea;
  --gray-300: #c0c0d0;
  --gray-400: #8888a0;
  --gray-500: #6a6a80;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  padding: 10px 24px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--accent {
  background: var(--accent);
  color: var(--dark);
  border-color: var(--accent);
}
.btn--accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(238,232,82,0.3);
}
.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.25);
}
.btn--outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.06);
}
.btn--large { padding: 14px 32px; font-size: 1.05rem; border-radius: 12px; }
.btn--small { padding: 7px 18px; font-size: 0.85rem; }
.btn--block { width: 100%; text-align: center; }

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all var(--transition);
}
.nav--scrolled {
  background: rgba(26,26,46,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 10px 0;
  box-shadow: 0 2px 24px rgba(0,0,0,0.2);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
}
.nav__logo-icon { font-size: 1.4rem; }
.nav__logo-text { letter-spacing: -0.02em; }
.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav__links a:not(.btn) {
  opacity: 0.75;
  transition: opacity var(--transition);
}
.nav__links a:not(.btn):hover { opacity: 1; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(238,232,82,0.1) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(238,232,82,0.05) 0%, transparent 60%);
  pointer-events: none;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
}
.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero__title--accent {
  background: linear-gradient(135deg, var(--accent), #f5d020);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle {
  font-size: 1.15rem;
  color: var(--gray-300);
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero__badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.badge {
  display: inline-block;
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0.85;
}
.badge:hover { transform: scale(1.04); opacity: 1; }

/* Phone Mockup */
.hero__visual {
  display: flex;
  justify-content: center;
}
.phone-mock {
  width: 280px;
  background: var(--dark-surface);
  border-radius: 36px;
  padding: 12px;
  box-shadow:
    0 24px 80px rgba(0,0,0,0.35),
    0 0 0 1px rgba(255,255,255,0.05),
    inset 0 1px 0 rgba(255,255,255,0.06);
  position: relative;
}
.phone-mock::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 24px;
  background: var(--dark);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}
.phone-mock__screen {
  background: var(--dark);
  border-radius: 26px;
  padding: 40px 16px 24px;
  min-height: 440px;
}
.phone-mock__status-bar {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--gray-400);
  margin-bottom: 20px;
  padding: 0 4px;
}
.phone-mock__header {
  text-align: center;
  margin-bottom: 20px;
}
.phone-mock__app-name {
  display: block;
  font-size: 0.75rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.phone-mock__score {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.phone-mock__label {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-300);
  margin-top: 4px;
}

/* Quote display */
.phone-mock__quote {
  background: var(--dark-card);
  border-radius: 12px;
  padding: 20px 16px;
  margin-bottom: 16px;
  border-left: 3px solid var(--accent);
}
.phone-mock__quote p {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--gray-200);
  line-height: 1.6;
}

/* Choice buttons */
.phone-mock__choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}
.phone-mock__choice {
  background: var(--dark-surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-300);
  text-align: center;
  transition: all var(--transition);
}
.phone-mock__choice--correct {
  background: rgba(238,232,82,0.15);
  border-color: var(--accent);
  color: var(--accent);
}

/* Timer bar */
.phone-mock__timer {
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  height: 4px;
  overflow: hidden;
}
.phone-mock__timer-bar {
  width: 65%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #f5d020);
  border-radius: 4px;
}

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-header__subtitle {
  font-size: 1.05rem;
  color: var(--gray-400);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== How It Works ===== */
.how-it-works {
  padding: 100px 0;
  position: relative;
}
.how-it-works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.step {
  text-align: center;
  padding: 32px 24px;
}
.step__number {
  width: 56px;
  height: 56px;
  background: rgba(238,232,82,0.1);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  margin: 0 auto 20px;
}
.step__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.step__desc {
  font-size: 0.92rem;
  color: var(--gray-400);
  line-height: 1.6;
}

/* ===== Categories ===== */
.categories {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark-surface) 100%);
}
.categories__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--dark-surface);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: all var(--transition);
}
.category-card:hover {
  transform: translateY(-4px);
  border-color: rgba(238,232,82,0.2);
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}
.category-card__emoji {
  font-size: 2.8rem;
  margin-bottom: 20px;
}
.category-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.category-card__desc {
  font-size: 0.9rem;
  color: var(--gray-400);
  line-height: 1.6;
}

/* ===== Features ===== */
.features {
  padding: 100px 0;
  background: var(--dark);
  position: relative;
}
.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--dark-surface);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}
.feature-card:hover {
  background: var(--dark-card);
  border-color: rgba(238,232,82,0.15);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}
.feature-card__icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}
.feature-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card__desc {
  font-size: 0.88rem;
  color: var(--gray-400);
  line-height: 1.6;
}

/* ===== CTA ===== */
.cta {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--dark-surface) 0%, var(--dark) 100%);
}
.cta__inner {
  text-align: center;
}
.cta__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.cta__subtitle {
  font-size: 1.05rem;
  color: var(--gray-400);
  margin-bottom: 32px;
}
.cta .hero__badges {
  justify-content: center;
}

/* ===== Footer ===== */
.footer {
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  padding-bottom: 48px;
}
.footer__tagline {
  color: var(--gray-400);
  font-size: 0.9rem;
  margin-top: 12px;
}
.footer__links {
  display: flex;
  gap: 56px;
}
.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  margin-bottom: 4px;
}
.footer__col a {
  font-size: 0.9rem;
  color: var(--gray-300);
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--white); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 20px 0;
  text-align: center;
}
.footer__bottom p {
  font-size: 0.82rem;
  color: var(--gray-500);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .categories__grid { grid-template-columns: repeat(2, 1fr); }
  .categories__grid .category-card:last-child { grid-column: 1 / -1; max-width: 400px; justify-self: center; }
}

@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 260px;
    background: var(--dark-surface);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 80px 32px 32px;
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: -8px 0 32px rgba(0,0,0,0.3);
  }
  .nav__links--open { transform: translateX(0); }
  .nav__links a {
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    opacity: 1 !important;
  }
  .nav__links .btn { margin-top: 16px; border-bottom: none; }
  .nav__toggle { display: flex; }

  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  .hero__subtitle { margin-left: auto; margin-right: auto; }
  .hero__cta { justify-content: center; }
  .hero__badges { justify-content: center; }

  .steps { grid-template-columns: 1fr; gap: 16px; }
  .categories__grid { grid-template-columns: 1fr; }
  .categories__grid .category-card:last-child { max-width: none; }
  .features__grid { grid-template-columns: 1fr; gap: 12px; }

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

@media (max-width: 480px) {
  .hero__title { font-size: 1.9rem; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; }
  .footer__links { flex-direction: column; gap: 24px; }
}