/* ===========================
   CartyUp Landing Page Styles
   =========================== */

:root {
  --color-primary: #4caf50;
  --color-primary-dark: #388e3c;
  --color-primary-light: #81c784;
  --color-primary-bg: #e8f5e9;
  --color-text: #1a1a2e;
  --color-text-secondary: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8faf8;
  --color-border: #e2e8f0;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container-max: 1120px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===========================
   Button
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(76,175,80,0.3);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(76,175,80,0.4);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

/* ===========================
   Header
   =========================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header__brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

/* ===========================
   Hero
   =========================== */
.hero {
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.hero__badges {
  display: inline-flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero__badge--active {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

.hero__badge--muted {
  background: var(--color-bg-alt, #f0f0f0);
  color: var(--color-text-secondary);
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__highlight {
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: 16px;
}

/* Carousel */
.hero__visual {
  display: flex;
  justify-content: center;
}

.carousel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.carousel__frame {
  width: 300px;
  border-radius: 36px;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background: var(--color-bg);
}

.carousel__track {
  display: flex;
  transition: transform 0.4s ease;
  will-change: transform;
}

.carousel__slide {
  min-width: 100%;
  flex: 0 0 100%;
}

.carousel__slide img {
  width: 100%;
  height: auto;
  display: block;
}

.carousel__dots {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.carousel__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--color-border);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}

.carousel__dot--active {
  background: var(--color-primary);
  transform: scale(1.2);
}

/* ===========================
   Features
   =========================== */
.features {
  padding: 80px 0;
  background: var(--color-bg-alt);
}

.features__title {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.feature-card__icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card__desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===========================
   Notify / CTA
   =========================== */
.notify {
  padding: 80px 0;
}

.notify__inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.notify__title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.notify__subtitle {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  line-height: 1.7;
}

.notify__form {
  margin-bottom: 16px;
}

.notify__input-wrap {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.notify__input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
  background: var(--color-bg);
  color: var(--color-text);
}

.notify__input:focus {
  border-color: var(--color-primary);
}

.notify__input::placeholder {
  color: #94a3b8;
}

.notify__btn {
  flex-shrink: 0;
}

.notify__feedback {
  margin-top: 12px;
  font-size: 0.9rem;
  min-height: 24px;
}

.notify__feedback--success {
  color: var(--color-primary-dark);
}

.notify__feedback--error {
  color: #e53e3e;
}

.notify__disclaimer {
  font-size: 0.8rem;
  color: #94a3b8;
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--color-primary);
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  .hero {
    padding: 48px 0 40px;
  }

  .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__visual {
    order: -1;
  }

  .carousel__frame {
    width: 260px;
  }

  .features__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .notify__input-wrap {
    flex-direction: column;
  }

  .footer__inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__badges,
.hero__title,
.hero__subtitle,
.hero__cta {
  animation: fadeInUp 0.6s ease both;
}

.hero__title { animation-delay: 0.1s; }
.hero__subtitle { animation-delay: 0.2s; }
.hero__cta { animation-delay: 0.3s; }

.hero__visual {
  animation: fadeInUp 0.8s ease 0.2s both;
}

/* Phone floating animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero__phone {
  animation: float 4s ease-in-out infinite;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .carousel__track {
    transition: none;
  }

  .hero__phone {
    animation: none;
  }

  .hero__badges,
  .hero__title,
  .hero__subtitle,
  .hero__cta,
  .hero__visual {
    animation: none;
  }
}