/* =============================================
   RealA Website - Design System
   Mirrors the Flutter AppTheme / AppColors
   ============================================= */

/* Inter font - matches GoogleFonts.inter() */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ---- Design Tokens ---- */
:root {
  /* Primary */
  --color-primary:        #60A5FA;
  --color-primary-light:  #93C5FD;
  --color-primary-dark:   #3B82F6;

  /* Secondary */
  --color-secondary:      #10B981;
  --color-secondary-light:#34D399;

  /* Semantic */
  --color-error:   #EF4444;
  --color-success: #10B981;
  --color-warning: #F59E0B;

  /* Surface & Background */
  --color-surface:        #FFFFFF;
  --color-bg:             #F9FAFB;
  --color-bg-secondary:   #E0F2FE;

  /* Text */
  --color-text-primary:   #111827;
  --color-text-secondary: #6B7280;
  --color-text-tertiary:  #9CA3AF;
  --color-text-on-primary:#FFFFFF;

  /* Border / Divider */
  --color-border:   #E5E7EB;
  --color-divider:  #E5E7EB;

  /* Dark surface (used in footer/nav dark areas) */
  --color-dark-bg:        #111827;
  --color-dark-surface:   #1F2937;
  --color-dark-bg-2:      #1E3A5F;
  --color-dark-text:      #F9FAFB;
  --color-dark-text-2:    #D1D5DB;
  --color-dark-text-3:    #9CA3AF;
  --color-dark-border:    #374151;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   12px;
  --space-lg:   16px;
  --space-xl:   24px;
  --space-xxl:  32px;
  --space-xxxl: 40px;
  --space-huge: 48px;

  /* Border Radius */
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-xl: 0 6px 16px rgba(0,0,0,0.12);
}

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

/* ---- Base ---- */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-primary);
  background:
    radial-gradient(900px 420px at 50% -120px, rgba(96, 165, 250, 0.18), transparent 65%),
    var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---- NAV ---- */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: var(--space-md);
  min-height: 60px;
  box-shadow: var(--shadow-sm);
}

.nav-logo {
  order: 1;
  font-size: 1.4em;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.nav-logo:hover { text-decoration: none; }

.nav-menu-toggle {
  display: none;
  order: 2;
  margin-left: auto;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.nav-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary-dark);
  outline-offset: 2px;
}
.nav-menu-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 1px;
  background: var(--color-text-primary);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
@media (prefers-reduced-motion: reduce) {
  .nav-menu-toggle__bar { transition: none; }
}
.site-nav.is-open .nav-menu-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-nav.is-open .nav-menu-toggle__bar:nth-child(2) {
  opacity: 0;
}
.site-nav.is-open .nav-menu-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-links {
  order: 3;
  display: flex;
  gap: var(--space-xl);
  flex-wrap: nowrap;
  list-style: none;
  font-size: 0.9em;
  font-weight: 500;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--color-primary);
  color: var(--color-text-on-primary) !important;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-weight: 600 !important;
  transition: background 0.15s !important;
}
.nav-cta:hover { background: var(--color-primary-dark) !important; text-decoration: none !important; }

/* ---- PAGE WRAPPER ---- */
.page-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-huge) var(--space-xl);
}

.page-wrap-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-huge) var(--space-xl);
}

/* ---- HERO ---- */
.hero {
  background:
    radial-gradient(900px 420px at 50% -120px, rgba(96, 165, 250, 0.18), transparent 65%),
    var(--color-bg);
  padding: 80px var(--space-xl);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero-brand {
  font-size: clamp(3.5rem, 11vw, 6rem);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0 0 var(--space-md);
}

.hero h1 {
  font-size: 3em;
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-lg);
}

.hero .tagline {
  font-size: 1.2em;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto var(--space-xxl);
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-huge);
}

/* ---- BUTTONS ---- */
.btn-primary {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  padding: var(--space-md) var(--space-xxl);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95em;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn-secondary {
  display: inline-block;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
  padding: var(--space-md) var(--space-xxl);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95em;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  text-decoration: none;
}

/* ---- HERO SCREENSHOTS ---- */
.screenshot-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-top: var(--space-xxxl);
  padding: var(--space-lg) 0;
}

.screenshot-frame {
  max-width: 320px;
  flex: 1 1 260px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
  background: transparent;
  box-shadow: 0 18px 35px rgba(15, 23, 42, 0.45);
  border-radius: 38px;
  overflow: hidden;
}

.screenshot-frame:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 55px rgba(15, 23, 42, 0.55);
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 38px;
  display: block;
}

@media (max-width: 640px) {
  .screenshot-row {
    gap: var(--space-md);
    margin-top: var(--space-xxl);
  }
  .screenshot-frame {
    max-width: 260px;
  }
}

/* Content / step screenshots: same frame style as hero, smaller size */
.screenshot-row--content {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  align-items: flex-start;
  margin-top: 12px;
  margin-bottom: 0;
  padding: 0;
}
.screenshot-row--content .screenshot-frame {
  max-width: 220px;
  flex: 0 1 220px;
}
.screenshot-frame--wide {
  max-width: 280px;
  flex: 0 0 280px;
  margin-top: 12px;
  margin-left: auto;
  margin-right: auto;
}
.screenshot-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) {
  .screenshot-pair {
    grid-template-columns: 1fr;
  }
}

/* Screenshot carousel - one screen at a time */
.carousel {
  position: relative;
  max-width: 280px;
  margin: 12px auto 0;
}
.carousel-track {
  display: flex;
  transition: transform 0.35s ease;
}
.carousel-slide {
  flex: 0 0 100%;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.carousel-slide .screenshot-frame {
  max-width: 260px;
  flex: 0 1 260px;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.35);
  border-radius: 32px;
}
.carousel-slide .screenshot-frame img {
  border-radius: 32px;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  color: var(--color-text-primary);
  font-size: 1.1em;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, box-shadow 0.15s;
}
.carousel-btn:hover {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.carousel-btn--prev { left: -44px; }
.carousel-btn--next { right: -44px; }
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 14px;
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: var(--color-border);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.carousel-dot.is-active {
  background: var(--color-primary);
  transform: scale(1.25);
}
.carousel-counter {
  text-align: center;
  font-size: 0.8em;
  color: var(--color-text-tertiary);
  margin-top: 6px;
}
@media (max-width: 640px) {
  .carousel { max-width: 240px; }
  .carousel-slide .screenshot-frame {
    max-width: 220px;
    flex-basis: 220px;
  }
  .carousel-btn--prev { left: -38px; }
  .carousel-btn--next { right: -38px; }
}
@media (max-width: 400px) {
  .carousel-btn--prev { left: -30px; }
  .carousel-btn--next { right: -30px; }
  .carousel-btn { width: 30px; height: 30px; font-size: 0.95em; }
}

/* ---- ADD BADGE (placeholder marker) ---- */
.add-badge {
  display: inline-block;
  background: #FEF3C7;
  border: 1px dashed #D97706;
  color: #92400E;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.78em;
  font-weight: 600;
  font-style: italic;
  margin: 2px 0;
}

/* ---- SECTIONS ---- */
section { padding: 56px var(--space-xl); }
section:nth-child(even) { background: var(--color-surface); }

.section-inner {
  max-width: 900px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.75em;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xxl);
  line-height: 1.6;
}

/* ---- CARDS GRID ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); }

.card h3 {
  font-size: 1.05em;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}
.card p { color: var(--color-text-secondary); font-size: 0.93em; line-height: 1.6; }

.card-icon {
  font-size: 1.75em;
  margin-bottom: var(--space-md);
}

/* ---- STEPS ---- */
.steps { }

.step {
  display: flex;
  gap: var(--space-xl);
  margin-bottom: var(--space-xxl);
  align-items: flex-start;
}

.step-num {
  min-width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1em;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.step-content h3 {
  font-size: 1.05em;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}
.step-content p { color: var(--color-text-secondary); font-size: 0.93em; }

/* ---- LEGAL CONTENT ---- */
.legal-content h2 {
  font-size: 1.2em;
  font-weight: 600;
  margin: var(--space-xxl) 0 var(--space-sm);
  color: var(--color-text-primary);
}
.legal-content h3 {
  font-size: 1em;
  font-weight: 600;
  margin: var(--space-xl) 0 var(--space-xs);
  color: var(--color-text-primary);
}
.legal-content p { margin-bottom: var(--space-md); color: var(--color-text-secondary); line-height: 1.7; }
.legal-content ul { margin: var(--space-sm) 0 var(--space-md) var(--space-xl); color: var(--color-text-secondary); }
.legal-content ul li { margin-bottom: var(--space-sm); }
.legal-content ol { margin: var(--space-sm) 0 var(--space-md) var(--space-xl); color: var(--color-text-secondary); }
.legal-content ol li { margin-bottom: var(--space-sm); }
.legal-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  font-size: 0.9em;
}
.legal-content th,
.legal-content td {
  border: 1px solid var(--color-border);
  padding: var(--space-md);
  text-align: left;
  line-height: 1.5;
}
.legal-content th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text-primary);
}
.legal-content td { color: var(--color-text-secondary); }
@media (max-width: 640px) {
  .legal-content table { font-size: 0.82em; }
  .legal-content th,
  .legal-content td { padding: var(--space-sm); }
}
.legal-content .last-updated {
  font-size: 0.88em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xxl);
}

/* Legal callouts (e.g. child safety) */
.legal-content .legal-callout {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}
.legal-content .legal-callout > h3:first-of-type {
  margin-top: 0;
}
.legal-content .legal-callout--urgent {
  background: #FFFBEB;
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-left: 4px solid var(--color-warning);
}
.legal-content .legal-callout--urgent > h3:first-of-type {
  color: var(--color-text-primary);
}

/* ---- FAQ ---- */
.faq-item {
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-xl) 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-item h3 {
  font-size: 1em;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}
.faq-item p { color: var(--color-text-secondary); font-size: 0.93em; line-height: 1.6; }

/* ---- CONTACT BLOCK ---- */
.contact-block {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: var(--space-xxl);
  margin: var(--space-xl) 0;
}
.contact-block h3 {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}
.legal-content .contact-block > h3:first-of-type {
  margin-top: 0;
}
.contact-block a { color: var(--color-primary-dark); font-weight: 600; }

/* ---- FOOTER ---- */
.site-footer {
  background: var(--color-dark-bg);
  color: var(--color-dark-text-2);
  padding: var(--space-huge) var(--space-xl) var(--space-xl);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto var(--space-xxl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-xxl);
}

.footer-col h4 {
  color: var(--color-dark-text);
  font-size: 0.8em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-lg);
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: var(--space-sm); }
.footer-col ul li a { color: var(--color-dark-text-2); font-size: 0.88em; text-decoration: none; transition: color 0.15s; }
.footer-col ul li a:hover { color: var(--color-dark-text); }

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--color-dark-border);
  padding-top: var(--space-lg);
  font-size: 0.83em;
  color: var(--color-dark-text-3);
  text-align: center;
}

/* Founder block (about page) - stacks on small screens */
.founder-block { flex-wrap: nowrap; }
@media (max-width: 640px) {
  .founder-block {
    flex-wrap: wrap !important;
    flex-direction: column !important;
    text-align: center !important;
    padding: 24px 20px !important;
    gap: 20px !important;
    align-items: center !important;
  }
  .founder-block .founder-photo {
    order: -1;
    width: 140px !important;
    height: 140px !important;
  }
  .founder-block .founder-testimonial {
    text-align: left;
    margin-left: auto;
    margin-right: auto;
    max-width: 28rem;
  }
}

/* Mobile nav */
@media (max-width: 768px) {
  .site-nav {
    flex-wrap: wrap;
    padding: var(--space-sm) var(--space-lg);
    gap: 0;
    row-gap: 0;
    min-height: 56px;
  }
  .nav-menu-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin: var(--space-md) 0 0;
    padding: var(--space-sm) 0 0;
    border-top: 1px solid var(--color-border);
    font-size: 1em;
  }
  .site-nav.is-open .nav-links {
    display: flex;
  }
  .nav-links li {
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links li:last-child {
    border-bottom: none;
  }
  .nav-links a {
    display: block;
    padding: var(--space-md) var(--space-xs);
  }
  .nav-links a.nav-cta {
    margin-top: var(--space-sm);
    text-align: center;
  }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 640px) {
  .hero-brand { font-size: clamp(2.75rem, 14vw, 4rem); }
  .hero h1 { font-size: 2em; }
  .hero .tagline { font-size: 1.05em; }
  section { padding: 40px var(--space-lg); }
  .page-wrap { padding: var(--space-xxl) var(--space-lg); }
}