/* ==========================================================================
   wetakeflight.ai — Dual Theme System
   Light (default) + Dark (html.dark)
   Shared styles for landing page (/) and Pre-Flight Check (/check)
   ========================================================================== */

/* ---------- Light Theme Tokens (Default) ---------- */
:root {
  /* Surfaces */
  --surface: #f8f8fa;
  --surface-low: #f0f0f4;
  --surface-mid: #f5f5f7;
  --surface-high: #eaeaee;

  /* Primary accent */
  --primary: #5b5dff;
  --primary-container: #8083ff;

  /* Text */
  --on-surface: #1a1a2e;
  --on-surface-variant: #4a4a5a;

  /* Borders */
  --outline-variant: #d0d0d8;

  /* Page background */
  --page-bg: #ffffff;
  --grid-color: #e8e5e0;
  --grid-size: 29px;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --container-max: 720px;
}

/* ---------- Dark Theme Tokens ---------- */
html.dark {
  --surface: #13121c;
  --surface-low: #1b1b24;
  --surface-mid: #1f1f28;
  --surface-high: #292933;

  --primary: #c0c1ff;
  --primary-container: #8083ff;

  --on-surface: #e4e1ee;
  --on-surface-variant: #c7c4d7;

  --outline-variant: #464554;

  --page-bg: #0b0b14;
  --grid-color: rgba(20, 19, 34, 0.6);
  --grid-size: 48px;
}

/* ---------- Grid Background ---------- */
body {
  background-color: var(--page-bg);
  /* Light: dot grid */
  background-image: radial-gradient(circle, var(--grid-color) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  font-family: var(--font-body);
  color: var(--on-surface);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

/* Dark: line grid */
html.dark body {
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
}

/* ---------- Container ---------- */
.check-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: rgba(31, 31, 40, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 0.75rem;
  border: 1px solid rgba(70, 69, 84, 0.15);
  padding: 2rem;
}

/* ---------- Buttons ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: #13121c;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  background: transparent;
  color: var(--on-surface-variant);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.875rem 1.5rem;
  border: 1px solid rgba(70, 69, 84, 0.15);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.btn-ghost:hover {
  border-color: var(--outline-variant);
}

/* ---------- Progress Gauge ---------- */
.progress-gauge {
  width: 100%;
  height: 2px;
  background: var(--surface-high);
  border-radius: 1px;
  overflow: hidden;
}

.progress-gauge-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-container));
  transition: width 0.3s ease;
  border-radius: 1px;
}

/* ---------- Input Fields ---------- */
.input-field {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 0;
  outline: none;
  transition: border-color 0.2s;
}

.input-field:focus {
  border-bottom-color: var(--primary);
}

.input-field::placeholder {
  color: var(--on-surface-variant);
  opacity: 0.5;
}

/* ---------- Option Cards ---------- */
.option-card {
  background: var(--surface-mid);
  border: 1px solid rgba(70, 69, 84, 0.15);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  text-align: left;
}

.option-card:hover {
  background: var(--surface-high);
  border-color: rgba(70, 69, 84, 0.4);
}

.option-card.selected {
  border-color: var(--primary-container);
  background: rgba(128, 131, 255, 0.08);
}

/* ---------- Score Bar ---------- */
.score-bar-track {
  width: 100%;
  height: 6px;
  background: var(--surface-high);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-container));
  border-radius: 3px;
  transition: width 0.6s ease;
}

/* ---------- Labels ---------- */
.label-text {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
}

/* ---------- Screen Transitions ---------- */
.screen {
  transition: opacity 0.3s ease;
}

.screen.hidden {
  display: none;
}

/* ---------- Landing Page Components ---------- */
.landing-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.product-card {
  background: var(--surface-mid);
  border: 1px solid var(--outline-variant);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: transform 0.2s, border-color 0.2s;
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.product-card.featured {
  border-color: var(--primary-container);
  position: relative;
}

.step-number {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: #13121c;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .check-container {
    padding: 1.25rem 1rem;
  }

  .glass-card {
    padding: 1.25rem;
  }

  .landing-container {
    padding: 0 1rem;
  }
}