/* ==========================================================================
   EquiFlow — Shared Stylesheet
   Forest & Gold design system
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */

:root {
  /* Color tokens */
  --forest-900: #0a0a0a;
  --forest-800: #0d160d;
  --forest-700: #1a2e1a;
  --forest-600: #2d5a27;
  --forest-500: #4b8b3b;
  --forest-400: #9bbb8a;
  --gold: #d4a853;
  --cream: #f5f0e8;

  /* Font stack */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 120px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 100px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--forest-900);
  color: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   3. Skip-to-content link
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--gold);
  color: var(--forest-900);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
  outline: 2px solid var(--cream);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   4. Navigation
   -------------------------------------------------------------------------- */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-2xl);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(45, 90, 39, 0.3);
}

.logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--cream);
}

.logo span {
  color: var(--gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--forest-400);
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--cream);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--forest-400);
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
  border-color: var(--forest-500);
  color: var(--cream);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--cream);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger open state */
.nav-open .hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-open .hamburger span:nth-child(2) {
  opacity: 0;
}

.nav-open .hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-5xl) var(--space-2xl) var(--space-3xl);
  background: linear-gradient(180deg, var(--forest-700) 0%, var(--forest-600) 100%);
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(75, 139, 59, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  color: var(--cream);
  margin-bottom: var(--space-lg);
}

.hero h1 .highlight {
  color: var(--forest-500);
}

.subtitle {
  font-size: 20px;
  line-height: 1.5;
  color: var(--forest-400);
  margin-bottom: var(--space-xl);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--forest-900);
  background: var(--cream);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.app-store-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 83, 0.25);
}

.app-store-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.app-store-btn img {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   6. Phone Mockups
   -------------------------------------------------------------------------- */

.phones {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  padding: 0 var(--space-md);
}

.phone {
  flex-shrink: 0;
  width: 180px;
  border-radius: var(--radius-xl);
  border: 2px solid var(--forest-600);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  transition: transform var(--transition-base);
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Outer phones — rotated */
.phone:nth-child(1) {
  transform: rotate(-8deg) scale(0.9);
}

.phone:nth-child(2) {
  transform: rotate(-4deg) scale(0.95);
}

/* Center phone — emphasized */
.phone:nth-child(3) {
  transform: scale(1.05);
  border-color: var(--forest-500);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    0 0 40px rgba(75, 139, 59, 0.2);
}

.phone:nth-child(4) {
  transform: rotate(4deg) scale(0.95);
}

.phone:nth-child(5) {
  transform: rotate(8deg) scale(0.9);
}

/* --------------------------------------------------------------------------
   7. Section Commons
   -------------------------------------------------------------------------- */

.features,
.screenshots,
.pricing {
  padding: var(--space-5xl) var(--space-2xl);
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  text-align: center;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 18px;
  color: var(--forest-400);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.divider {
  height: 1px;
  border: none;
  background: linear-gradient(90deg, transparent, var(--forest-600), transparent);
  margin: 0;
}

/* --------------------------------------------------------------------------
   8. Feature Cards
   -------------------------------------------------------------------------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: linear-gradient(180deg, var(--forest-700), rgba(13, 22, 13, 0.8));
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--forest-500);
}

.feature-card .feature-icon {
  font-size: 32px;
  margin-bottom: var(--space-md);
  line-height: 1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--forest-400);
}

/* --------------------------------------------------------------------------
   9. Screenshots Section
   -------------------------------------------------------------------------- */

.screenshots-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
  max-width: 1100px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.screenshot-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.screenshot-item img {
  aspect-ratio: 9 / 19.5;
  width: 180px;
  border-radius: var(--radius-xl);
  border: 2px solid var(--forest-600);
  object-fit: cover;
}

.screenshot-item .screenshot-label {
  font-size: 13px;
  color: var(--forest-400);
  text-align: center;
}

/* --------------------------------------------------------------------------
   10. Pricing Cards
   -------------------------------------------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
  align-items: start;
}

.price-card {
  position: relative;
  background: var(--forest-700);
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  text-align: center;
}

.price-card.featured {
  border-color: var(--gold);
}

.price-card.featured::before {
  content: attr(data-badge);
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--forest-900);
  background: var(--gold);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.price-card .plan-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--forest-400);
  margin-bottom: var(--space-sm);
}

.price-card .price {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: var(--space-xs);
}

.price-card .price-period {
  font-size: 14px;
  color: var(--forest-400);
  margin-bottom: var(--space-lg);
}

.price-card .features-list {
  text-align: left;
  margin-bottom: var(--space-xl);
}

.price-card .features-list li {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: 10px 0;
  font-size: 14px;
  color: var(--forest-400);
  border-bottom: 1px solid rgba(45, 90, 39, 0.3);
}

.price-card .features-list li::before {
  content: '\2713';
  color: var(--forest-500);
  font-weight: 700;
  flex-shrink: 0;
}

.btn-outline {
  display: inline-block;
  width: 100%;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--forest-500);
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-pill);
  text-align: center;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.btn-outline:hover {
  border-color: var(--forest-500);
  color: var(--cream);
}

.btn-primary {
  display: inline-block;
  width: 100%;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--forest-900);
  background: var(--gold);
  border: none;
  border-radius: var(--radius-pill);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 168, 83, 0.3);
}

/* --------------------------------------------------------------------------
   11. Content Pages (Prose)
   -------------------------------------------------------------------------- */

.prose {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-5xl) var(--space-2xl) var(--space-3xl);
}

.prose h1 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: var(--space-lg);
}

.prose h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.prose h3 {
  font-size: 22px;
  font-weight: 700;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.prose p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--forest-400);
  margin-bottom: var(--space-md);
}

.prose a {
  color: var(--forest-500);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.prose a:hover {
  color: var(--cream);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
  color: var(--forest-400);
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.prose strong {
  color: var(--cream);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   12. FAQ Accordion
   -------------------------------------------------------------------------- */

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

.faq-list details {
  border-bottom: 1px solid rgba(45, 90, 39, 0.3);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  color: var(--cream);
  transition: color var(--transition-fast);
}

.faq-list summary:hover {
  color: var(--gold);
}

.faq-list summary::marker,
.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--forest-400);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-md);
}

.faq-list details[open] summary::after {
  content: '\2212';
}

.faq-list details .faq-answer {
  padding: 0 0 var(--space-md);
  font-size: 15px;
  line-height: 1.7;
  color: var(--forest-400);
  animation: faq-reveal 0.3s ease;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   13. Press Kit
   -------------------------------------------------------------------------- */

.facts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 720px;
  margin: 0 auto var(--space-2xl);
}

.facts-grid .fact {
  padding: var(--space-lg);
  background: var(--forest-700);
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-md);
}

.facts-grid .fact dt {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--forest-400);
  margin-bottom: var(--space-xs);
}

.facts-grid .fact dd {
  font-size: 18px;
  font-weight: 700;
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--forest-500);
  border: 1px solid var(--forest-600);
  border-radius: var(--radius-pill);
  margin-right: var(--space-sm);
  margin-bottom: var(--space-sm);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.download-link:hover {
  border-color: var(--forest-500);
  color: var(--cream);
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */

footer {
  padding: var(--space-2xl);
  border-top: 1px solid var(--forest-700);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 13px;
  color: var(--forest-400);
}

footer a {
  color: var(--forest-400);
  transition: color var(--transition-fast);
}

footer a:hover {
  color: var(--cream);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   15. Scroll Animations
   -------------------------------------------------------------------------- */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --------------------------------------------------------------------------
   16. 404 Page
   -------------------------------------------------------------------------- */

.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--space-2xl);
}

.error-page h1 {
  font-size: 80px;
  font-weight: 800;
  letter-spacing: -2px;
  color: var(--forest-600);
  margin-bottom: var(--space-md);
}

.error-page p {
  font-size: 18px;
  color: var(--forest-400);
  margin-bottom: var(--space-xl);
}

.error-page a {
  color: var(--gold);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* --------------------------------------------------------------------------
   17. Responsive — Tablet (768px - 1024px)
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 40px;
  }

  .features,
  .screenshots,
  .pricing {
    padding: 80px var(--space-xl);
  }

  .section-title {
    font-size: 32px;
  }

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

  .phone {
    width: 140px;
  }

  .pricing-grid {
    gap: var(--space-md);
  }

  .facts-grid {
    gap: var(--space-md);
  }
}

/* --------------------------------------------------------------------------
   18. Responsive — Mobile (<768px)
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
  /* Navigation */
  .hamburger {
    display: flex;
  }

  nav {
    padding: var(--space-md) var(--space-md);
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 99;
  }

  .nav-links a {
    font-size: 20px;
  }

  .nav-open .nav-links {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: var(--space-5xl) var(--space-md) var(--space-2xl);
  }

  .hero h1 {
    font-size: 32px;
    letter-spacing: -1px;
  }

  .subtitle {
    font-size: 17px;
  }

  /* Phone mockups — show only 3 center phones */
  .phones {
    gap: var(--space-md);
  }

  .phone {
    width: 120px;
  }

  .phone:nth-child(1),
  .phone:nth-child(5) {
    display: none;
  }

  .phone:nth-child(2) {
    transform: rotate(-4deg) scale(0.92);
  }

  .phone:nth-child(4) {
    transform: rotate(4deg) scale(0.92);
  }

  /* Sections */
  .features,
  .screenshots,
  .pricing {
    padding: 60px var(--space-md);
  }

  .section-title {
    font-size: 28px;
  }

  .section-subtitle {
    font-size: 16px;
  }

  /* Feature cards — single column */
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .feature-card {
    padding: var(--space-lg);
  }

  /* Screenshots */
  .screenshots-row {
    gap: var(--space-md);
  }

  .screenshot-item img {
    width: 140px;
  }

  /* Pricing — single column */
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  /* Prose / content pages */
  .prose {
    padding: var(--space-5xl) var(--space-md) var(--space-2xl);
  }

  .prose h1 {
    font-size: 30px;
  }

  .prose h2 {
    font-size: 24px;
  }

  /* Facts grid — single column */
  .facts-grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  footer {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-xl) var(--space-md);
  }

  .footer-links {
    gap: var(--space-md);
  }
}