/* ── Backdraft Design System ── */

:root {
  /* Backgrounds — cool blue-gray */
  --bg-body: #F2F4F8;
  --bg-surface: #EAECF2;
  --bg-surface-raised: #FFFFFF;
  --bg-canvas: #E6EAF1;
  --bg-dark: #0C0C10;
  --bg-dark-surface: #18181B;

  /* Accents */
  --accent-blue: #3B82F6;
  --accent-blue-soft: #DBEAFE;
  --accent-blue-hover: #2563EB;
  --accent-green: #39FF14;
  --accent-green-soft: rgba(57, 255, 20, 0.12);
  --accent-magenta: #FF2DF1;
  --accent-yellow: #FFF500;

  /* Text */
  --text-heading: #111827;
  --text-body: #4B5563;
  --text-muted: #9CA3AF;
  --text-on-dark: #F9FAFB;
  --text-on-dark-muted: #9CA3AF;

  /* Borders */
  --border-default: #D1D5DB;
  --border-strong: #111827;
  --border-subtle: #E5E7EB;

  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-code: 'JetBrains Mono', 'Menlo', 'Monaco', 'Consolas', monospace;

  /* Spacing */
  --section-gap: 7rem;
  --container-max: 1152px;

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);
}

/* ── Reset / Base ── */

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

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

/* ── Texture System ── */

.dot-grid {
  background-image: radial-gradient(var(--border-default) 0.75px, transparent 0.75px);
  background-size: 24px 24px;
}

.cross-grid {
  background-image:
    linear-gradient(to right, var(--border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-subtle) 1px, transparent 1px);
  background-size: 48px 48px;
}

.fine-grid {
  background-image:
    linear-gradient(to right, rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}

.dark-grid {
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.ruler-x {
  height: 20px;
  border-bottom: 1px solid var(--border-default);
  background-image:
    linear-gradient(90deg, var(--border-default) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156,163,175,0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156,163,175,0.2) 1px, transparent 1px);
  background-size: 96px 100%, 48px 55%, 24px 30%;
  background-position: bottom;
  background-repeat: repeat-x;
}

.ruler-y {
  width: 20px;
  border-right: 1px solid var(--border-default);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 5;
  pointer-events: none;
  background-image:
    linear-gradient(180deg, var(--border-default) 1px, transparent 1px),
    linear-gradient(180deg, rgba(156,163,175,0.4) 1px, transparent 1px),
    linear-gradient(180deg, rgba(156,163,175,0.2) 1px, transparent 1px);
  background-size: 100% 96px, 55% 48px, 30% 24px;
  background-position: right;
  background-repeat: repeat-y;
  background-color: var(--bg-body);
  opacity: 0.5;
}

/* ── Container ── */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Typography ── */

h1, h2, h3, h4 { color: var(--text-heading); line-height: 1.15; }

.heading-xl {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.heading-lg {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.heading-md {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-body);
}

.body-sm {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-body);
}

.label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.code-font { font-family: var(--font-code); }

/* ── Highlight Marks (used sparingly) ── */

.highlight-green {
  background-image: linear-gradient(to right, rgba(57,255,20,0.15), rgba(57,255,20,0.25), rgba(57,255,20,0.15));
  background-repeat: no-repeat;
  background-size: 100% 0.35em;
  background-position: 0 88%;
  padding: 0 0.1em;
}

.highlight-yellow {
  background-image: linear-gradient(to right, rgba(255,245,0,0.2), rgba(255,245,0,0.35), rgba(255,245,0,0.2));
  background-repeat: no-repeat;
  background-size: 100% 0.35em;
  background-position: 0 88%;
  padding: 0 0.1em;
}

/* ── Buttons ── */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--text-heading);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out-cubic);
}

.btn-primary:hover {
  background: #000;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-blue {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-blue);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out-cubic);
}

.btn-blue:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--text-heading);
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid var(--border-default);
  cursor: pointer;
  transition: all 0.2s var(--ease-out-cubic);
}

.btn-outline:hover {
  border-color: var(--text-heading);
  background: rgba(0,0,0,0.02);
}

/* ── Cards ── */

.card {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s var(--ease-out-cubic);
}

.card:hover {
  border-color: var(--border-default);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.card-flat {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem;
}

/* ── Section patterns ── */

.section-light {
  background: var(--bg-body);
}

.section-white {
  background: var(--bg-surface-raised);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--text-on-dark);
}

.section-dark p,
.section-dark li {
  color: var(--text-on-dark-muted);
}

/* ── Mockup Frame ── */

.mockup-frame {
  border-radius: 12px;
  border: 1px solid var(--border-default);
  overflow: hidden;
  box-shadow: 0 20px 60px -15px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.04);
  background: white;
}

.mockup-frame-transparent {
  border-radius: 12px;
  overflow: hidden;
  background: transparent;
  border: none;
  box-shadow: none;
}

.mockup-frame iframe {
  width: 100%;
  border: none;
  display: block;
  overflow: hidden;
}

.mockup-overflow-center {
  display: flex;
  justify-content: center;
}

/* Mobile: wide mockups keep full width, left-aligned, overflow right */
@media (max-width: 767px) {
  .mockup-overflow-wide .mockup-frame,
  .mockup-overflow-wide .mockup-frame-transparent {
    min-width: 900px;
    border-radius: 12px 0 0 12px;
  }
  .mockup-overflow-wide .mockup-frame iframe,
  .mockup-overflow-wide .mockup-frame-transparent iframe {
    min-width: 900px;
  }
  .mockup-overflow-wide {
    overflow: hidden;
    margin-right: -2rem;
  }
  /* Narrow mockups (chat): fit within viewport, centered */
  .mockup-overflow-center .mockup-frame,
  .mockup-overflow-center .mockup-frame-transparent {
    max-width: 100%;
  }
  .mockup-overflow-center .mockup-frame iframe,
  .mockup-overflow-center .mockup-frame-transparent iframe {
    max-width: 100%;
    height: 440px !important;
  }
  /* Wide mockups that should be centered (annotation): full width, centered crop */
  .mockup-overflow-wide-center {
    overflow: hidden;
    margin-left: -2rem;
    margin-right: -2rem;
  }
  .mockup-overflow-wide-center .mockup-frame,
  .mockup-overflow-wide-center .mockup-frame-transparent {
    min-width: 900px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 12px;
  }
  .mockup-overflow-wide-center .mockup-frame iframe,
  .mockup-overflow-wide-center .mockup-frame-transparent iframe {
    min-width: 900px;
  }
}

.mockup-placeholder {
  background: var(--bg-surface);
  border: 2px dashed var(--border-default);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ── Trust Bar ── */

.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  opacity: 0.4;
}

.trust-bar span {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-body);
  white-space: nowrap;
}

/* ── Comparison Table ── */

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.compare-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-default);
}

.compare-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-body);
}

.compare-table tr:last-child td { border-bottom: none; }

/* ── Pricing Cards ── */

.pricing-card {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2.5rem;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 1px var(--accent-blue), 0 8px 32px rgba(59,130,246,0.1);
}

/* ── Scroll Reveal ── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

.reveal-delay-1 { transition-delay: 0.1s !important; }
.reveal-delay-2 { transition-delay: 0.2s !important; }
.reveal-delay-3 { transition-delay: 0.3s !important; }
.reveal-delay-4 { transition-delay: 0.4s !important; }

/* ── Corner Markers (Paper-inspired) ── */

.corner-marks {
  position: relative;
}

.corner-marks::before,
.corner-marks::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--border-default);
  pointer-events: none;
}

.corner-marks::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid;
  border-left: 1px solid;
}

.corner-marks::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 1px solid;
  border-right: 1px solid;
}

/* ── Badge ── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-raised);
  color: var(--text-muted);
}

.badge-blue {
  background: var(--accent-blue-soft);
  border-color: rgba(59,130,246,0.2);
  color: var(--accent-blue);
}

/* ── Step Numbers (Paper-inspired) ── */

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--text-heading);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ── Feature Icon ── */

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ── Scrollbar ── */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Animations ── */

@keyframes float-up {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes float-icon {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -8px; }
}

/* AI chat iframe — mobile override */
@media (max-width: 767px) {
  .ai-chat-iframe {
    width: 100% !important;
    height: 440px !important;
  }
}