/* TimeDebt Website - Design System */

:root {
  /* Colors */
  --bg-primary: #000000;
  --bg-secondary: #0A0A0C;
  --text-primary: #FFFFFF;
  --text-secondary: #A3A3A3;
  --text-muted: #525252;
  --accent-gold: #FBBF24;
  --accent-emerald: #34D399;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-border: rgba(255, 255, 255, 0.1);

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent-gold);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

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

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container--narrow {
  max-width: 800px;
}

/* Header / Navigation */
.header {
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 100;
  border-bottom: 1px solid var(--surface-border);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.nav__logo-icon {
  font-size: 1.5rem;
}

.nav__links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav__link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--text-primary);
  opacity: 1;
}

/* Hero Section */
.hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero__icon {
  font-size: 5rem;
  margin-bottom: var(--spacing-lg);
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.hero__title--accent {
  color: var(--accent-gold);
}

.hero__subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 1;
}

.btn--primary {
  background: var(--accent-gold);
  color: #000;
}

.btn--secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
}

.btn--large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.1rem;
}

/* Cards / Surfaces */
.card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

/* Features Section */
.features {
  padding: var(--spacing-3xl) 0;
}

.features__title {
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2xl);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.feature {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}

.feature__icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.feature__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.feature__description {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.pricing__title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.pricing__card {
  background: var(--bg-secondary);
  border: 2px solid var(--accent-gold);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  max-width: 400px;
  margin: 0 auto;
}

.pricing__price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.pricing__period {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.pricing__trial {
  display: inline-block;
  background: rgba(251, 191, 36, 0.15);
  color: var(--accent-gold);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
}

.pricing__features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing__feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
}

.pricing__feature::before {
  content: "✓";
  color: var(--accent-emerald);
  font-weight: 600;
}

/* Page Content */
.page {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.page__title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.page__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

/* Content Sections */
.section {
  margin-bottom: var(--spacing-2xl);
}

.section__title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.section__content {
  color: var(--text-secondary);
  line-height: 1.8;
}

.section__content p {
  margin-bottom: var(--spacing-md);
}

.section__content ul {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.section__content li {
  margin-bottom: var(--spacing-sm);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  padding: var(--spacing-lg);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--accent-gold);
}

.faq-item.active .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Contact Card */
.contact-card {
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(52, 211, 153, 0.05));
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
}

.contact-card__icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.contact-card__title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.contact-card__email {
  font-size: 1.25rem;
  color: var(--accent-gold);
}

/* Footer */
.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--surface-border);
  margin-top: var(--spacing-3xl);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer__link {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer__link:hover {
  color: var(--text-primary);
}

.footer__copyright {
  width: 100%;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: var(--spacing-lg);
}

/* App Store Badge */
.app-store-badge {
  display: inline-block;
  transition: transform 0.2s ease;
}

.app-store-badge:hover {
  transform: scale(1.05);
  opacity: 1;
}

.app-store-badge img {
  height: 54px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav__links {
    gap: var(--spacing-md);
  }

  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .hero__icon {
    font-size: 4rem;
  }

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

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

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* Utilities */
.text-center {
  text-align: center;
}

.text-gold {
  color: var(--accent-gold);
}

.text-emerald {
  color: var(--accent-emerald);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}