/* ========================================
   wityu Landing Page - Styles
   Mobile-first responsive design
   ======================================== */

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

:root {
  --yellow: #FFC800;
  --yellow-light: #FFD633;
  --yellow-dark: #E0B000;
  --black: #000000;
  --white: #FFFFFF;
  --bg: #FAFAFA;
  --gray-50: #F8F8F8;
  --gray-100: #F0F0F0;
  --gray-200: #E0E0E0;
  --gray-400: #999999;
  --gray-600: #666666;
  --gray-800: #333333;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Barlow', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--black);
}

.navbar-logo img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: none;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--gray-600);
  transition: color var(--transition);
}

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

.nav-cta {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: 50px;
  font-family: 'Barlow', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--yellow);
  color: var(--black);
}

.btn-primary:hover {
  background: var(--yellow-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(255, 200, 0, 0.4);
}

.btn-secondary {
  background: var(--black);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--gray-800);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 10px 22px;
  font-size: 0.9rem;
}

/* Mobile menu */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--black);
  transition: all var(--transition);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--white);
  padding: 24px 20px;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 999;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu .btn {
  width: 100%;
  margin-top: 16px;
}

/* ========================================
   HERO
   ======================================== */
.hero {
  padding: 100px 0 60px;
  background: var(--bg);
  overflow: hidden;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 40px;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 200, 0, 0.15);
  color: var(--yellow-dark);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--black);
  margin-bottom: 16px;
}

.hero h1 .accent {
  color: var(--yellow-dark);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.store-badge {
  height: 48px;
  width: auto;
  transition: transform var(--transition);
}

.store-badge:hover {
  transform: scale(1.05);
}

.hero-image {
  width: 100%;
  max-width: 600px;
}

.hero-image img {
  border-radius: var(--radius);
}

/* ========================================
   FEATURES
   ======================================== */
.features {
  padding: 80px 0;
  background: var(--black);
  color: var(--white);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--yellow);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
  line-height: 1.2;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--gray-400);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--yellow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--gray-400);
  line-height: 1.5;
}

/* ========================================
   HOW IT WORKS
   ======================================== */
.how-it-works {
  padding: 80px 0;
  background: var(--bg);
  color: var(--gray-800);
}

.how-it-works .section-tag {
  color: var(--yellow-dark);
}

.how-it-works .section-header h2 {
  color: var(--black);
}

.how-it-works .section-header p {
  color: var(--gray-600);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 600px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--yellow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--black);
}

.step-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

/* ========================================
   COMING SOON
   ======================================== */
.coming-soon {
  padding: 80px 0;
  background: var(--black);
  color: var(--white);
}

.coming-soon .section-tag {
  color: var(--yellow);
}

.coming-soon .section-header h2 {
  color: var(--white);
}

.coming-soon .section-header p {
  color: var(--gray-400);
}

.coming-soon-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 600px;
  margin: 0 auto 32px;
}

.coming-soon-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.coming-soon-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(255, 200, 0, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.coming-soon-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 2px;
}

.coming-soon-item p {
  font-size: 0.85rem;
  color: var(--gray-400);
}

.coming-soon-note {
  text-align: center;
  font-size: 1rem;
  color: var(--gray-400);
  font-style: italic;
}

/* ========================================
   FAQ
   ======================================== */
.faq {
  padding: 80px 0;
  background: var(--bg);
  color: var(--gray-800);
}

.faq .section-tag {
  color: var(--yellow-dark);
}

.faq .section-header h2 {
  color: var(--black);
}

.faq .section-header p {
  color: var(--gray-600);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  background: none;
  border: none;
  font-family: 'Barlow', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--black);
  cursor: pointer;
  text-align: left;
  gap: 16px;
}

.faq-question:hover {
  color: var(--yellow-dark);
}

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform var(--transition);
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--gray-600);
  border-radius: 2px;
}

.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition);
}

.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 0 20px;
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.faq-answer-inner ul {
  list-style: disc;
  padding-left: 20px;
  margin: 8px 0;
}

.faq-answer-inner li {
  margin-bottom: 6px;
}

.faq-answer-inner strong {
  color: var(--black);
}

/* ========================================
   FINAL CTA
   ======================================== */
.final-cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--yellow) 0%, var(--yellow-light) 100%);
  text-align: center;
}

.final-cta h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--black);
  margin-bottom: 12px;
}

.final-cta p {
  font-size: 1.05rem;
  color: rgba(0, 0, 0, 0.65);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta .store-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 40px 0;
  background: var(--black);
  color: var(--gray-400);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-logo {
  display: flex;
  justify-content: center;
}

.footer-logo-img {
  height: 40px;
  width: auto;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 24px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--gray-400);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--yellow);
}

.footer-stores {
  display: flex;
  gap: 12px;
}

.footer-stores img {
  height: 36px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--gray-600);
}

/* ========================================
   RESPONSIVE - Tablet (768px+)
   ======================================== */
@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }

  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: block;
  }

  .nav-toggle {
    display: none;
  }

  .hero {
    padding: 120px 0 80px;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }

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

  .section-header h2 {
    font-size: 2.2rem;
  }

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

  .final-cta h2 {
    font-size: 2.2rem;
  }

  .final-cta .store-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ========================================
   RESPONSIVE - Desktop (1024px+)
   ======================================== */
@media (min-width: 1024px) {
  .hero .container {
    flex-direction: row;
    text-align: left;
  }

  .hero-content {
    flex: 2;
  }

  .hero-buttons {
    justify-content: flex-start;
  }

  .hero-image {
    flex: 3;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   RESPONSIVE - Large (1440px+)
   ======================================== */
@media (min-width: 1440px) {
  .container {
    padding: 0;
  }

  .hero h1 {
    font-size: 3.4rem;
  }
}