/* ==========================================================================
   ADA DESIGN SYSTEM — THEME STYLESHEET
   Daylight gallery with pastel punctuation
   Theme: Light | Weight: 400 throughout | Radius: 4px/8px/32px/9999px
   ========================================================================== */

:root {
  /* Colors */
  --color-inkstone: #0a0b0c;
  --color-bone: #f9f9f9;
  --color-paper: #ffffff;
  --color-ash: #d8d8d8;
  --color-plum-ash: #392c38;
  --color-forest-depth: #00543d;
  --color-periwinkle: #abcbf9;
  --color-candy-pink: #ffbbfc;
  --color-butter: #fce88b;

  /* Typography — Font Families */
  --font-roobert: 'Roobert', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Typography — Weights */
  --font-weight-regular: 400;

  /* Typography — Scale */
  --text-caption: 12px;
  --leading-caption: 1.4;
  --text-body-sm: 14px;
  --leading-body-sm: 1.43;
  --text-body: 16px;
  --leading-body: 1.56;
  --text-subheading: 20px;
  --leading-subheading: 1.38;
  --text-heading-sm: 24px;
  --leading-heading-sm: 1.33;
  --text-heading: 32px;
  --leading-heading: 1.25;
  --text-heading-lg: 48px;
  --leading-heading-lg: 1.11;
  --text-display: 72px;
  --leading-display: 1;

  /* Spacing */
  --spacing-unit: 4px;
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-36: 36px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-72: 72px;
  --spacing-80: 80px;
  --spacing-96: 96px;
  --spacing-112: 112px;
  --spacing-120: 120px;
  --spacing-160: 160px;
  --spacing-176: 176px;

  /* Border Radius */
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-3xl: 28px;
  --radius-3xl-2: 32px;

  /* Named Radii */
  --radius-nav: 32px;
  --radius-cards: 8px;
  --radius-inputs: 4px;
  --radius-buttons: 9999px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 80px;
  --card-padding: 24px;
  --element-gap: 16px;

  /* Surfaces & Hairline Borders */
  --surface-canvas: #f9f9f9;
  --surface-card: #ffffff;
  --surface-dark: #0a0b0c;
  --surface-dark-surface: #0a0b0c;
  --surface-accent-wash: #abcbf9;
  --border-hairline: 1px solid rgba(10, 11, 12, 0.1);
  --border-hairline-subtle: 1px solid rgba(10, 11, 12, 0.06);
  --border-hairline-dark: 1px solid rgba(255, 255, 255, 0.1);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-roobert);
  font-weight: 400 !important;
  background-color: var(--surface-canvas);
  color: var(--color-inkstone);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: var(--leading-body);
  font-size: var(--text-body);
  margin: 0;
  padding: 0;
}

/* Typography Discipline: Weight stays 400 throughout; hierarchy is built purely through size */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6,
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6,
p, span, a, button, input, textarea, select, label {
  font-family: var(--font-roobert);
  font-weight: 400 !important;
}

.ada-display {
  font-size: clamp(36px, 5vw, var(--text-display));
  line-height: var(--leading-display);
  color: var(--color-inkstone);
  letter-spacing: -0.02em;
}

.ada-heading-lg {
  font-size: clamp(28px, 4vw, var(--text-heading-lg));
  line-height: var(--leading-heading-lg);
  color: var(--color-inkstone);
  letter-spacing: -0.01em;
}

.ada-heading {
  font-size: clamp(24px, 3vw, var(--text-heading));
  line-height: var(--leading-heading);
  color: var(--color-inkstone);
}

.ada-heading-sm {
  font-size: var(--text-heading-sm);
  line-height: var(--leading-heading-sm);
  color: var(--color-inkstone);
}

.ada-subheading {
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  color: var(--color-inkstone);
}

.ada-body {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-inkstone);
}

.ada-body-sm {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-inkstone);
}

.ada-caption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
}

.ada-muted {
  color: rgba(10, 11, 12, 0.7) !important;
}

.ada-muted-subtle {
  color: rgba(10, 11, 12, 0.55) !important;
}

/* Sections & Spacing */
.ada-section {
  padding-top: var(--spacing-80);
  padding-bottom: var(--spacing-80);
}

.ada-section-sm {
  padding-top: var(--spacing-48);
  padding-bottom: var(--spacing-48);
}

.ada-container {
  max-width: var(--page-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-24);
  padding-right: var(--spacing-24);
}

/* Flat Card Surfaces (No shadows, 8px radius, hairline border) */
.ada-card {
  background-color: var(--surface-card);
  border: var(--border-hairline);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  box-shadow: none !important;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.ada-card:hover {
  border-color: rgba(10, 11, 12, 0.25);
  box-shadow: none !important;
}

/* Stat Cards (4-Color Variant Set with 4px left-edge bars) */
.ada-stat-card {
  background-color: var(--surface-card);
  border: var(--border-hairline);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  position: relative;
  overflow: hidden;
  box-shadow: none !important;
  height: 100%;
}

.ada-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
}

.ada-stat-card.bar-forest::before {
  background-color: var(--color-forest-depth);
}

.ada-stat-card.bar-pink::before {
  background-color: var(--color-candy-pink);
}

.ada-stat-card.bar-periwinkle::before {
  background-color: var(--color-periwinkle);
}

.ada-stat-card.bar-butter::before {
  background-color: var(--color-butter);
}

.ada-stat-number {
  font-size: clamp(32px, 3.5vw, 44px);
  line-height: 1.1;
  color: var(--color-inkstone);
  margin-bottom: var(--spacing-8);
}

.ada-stat-label {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  color: rgba(10, 11, 12, 0.7);
  margin: 0;
}

/* Feature Image Card (Full-bleed image + 40% dark bottom gradient + 48px circular arrow button) */
.ada-feature-card {
  position: relative;
  border-radius: var(--radius-cards);
  border: var(--border-hairline);
  overflow: hidden;
  height: 380px;
  background-color: var(--color-inkstone);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-24);
  box-shadow: none !important;
  text-decoration: none;
  color: #ffffff;
}

.ada-feature-card-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  transition: transform 0.4s ease;
}

.ada-feature-card:hover .ada-feature-card-img {
  transform: scale(1.03);
}

.ada-feature-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(10, 11, 12, 0) 30%, rgba(10, 11, 12, 0.45) 60%, rgba(10, 11, 12, 0.85) 100%);
  z-index: 2;
}

.ada-feature-card-content {
  position: relative;
  z-index: 3;
  padding-right: 56px;
}

.ada-feature-card-title {
  font-size: var(--text-heading);
  line-height: var(--leading-heading);
  color: #ffffff;
  margin-bottom: var(--spacing-8);
}

.ada-feature-card-body {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.ada-feature-card .ada-btn-circle-arrow {
  position: absolute;
  right: var(--spacing-20);
  bottom: var(--spacing-20);
  z-index: 3;
}

/* Circular Arrow Button (48px diameter circle, #0a0b0c background, white right arrow) */
.ada-btn-circle-arrow {
  width: 48px;
  height: 48px;
  border-radius: 9999px;
  background-color: var(--color-inkstone);
  color: #ffffff !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-decoration: none;
  transition: transform 0.2s ease, background-color 0.2s ease;
  flex-shrink: 0;
}

.ada-btn-circle-arrow:hover {
  transform: translateX(3px);
  background-color: #1a1b1e;
  color: #ffffff;
}

.ada-btn-circle-arrow.light {
  background-color: #ffffff;
  color: var(--color-inkstone) !important;
  border: 1px solid rgba(10, 11, 12, 0.1);
}

/* Buttons System (Pill radius 9999px, flat, no gradients, no shadows) */
.ada-btn-dark {
  background-color: var(--color-inkstone);
  color: #ffffff !important;
  border-radius: var(--radius-buttons);
  padding: 12px 24px;
  font-size: var(--text-body-sm);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  text-decoration: none;
  border: 1px solid transparent;
  transition: opacity 0.2s ease, transform 0.15s ease;
  cursor: pointer;
  box-shadow: none !important;
}

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

.ada-btn-periwinkle {
  background-color: var(--color-periwinkle);
  color: var(--color-inkstone) !important;
  border-radius: var(--radius-buttons);
  padding: 12px 24px;
  font-size: var(--text-body-sm);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  text-decoration: none;
  border: 1px solid rgba(10, 11, 12, 0.1);
  transition: opacity 0.2s ease, transform 0.15s ease;
  cursor: pointer;
  box-shadow: none !important;
}

.ada-btn-periwinkle:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.ada-btn-forest {
  background-color: var(--color-forest-depth);
  color: #ffffff !important;
  border-radius: var(--radius-buttons);
  padding: 8px 16px;
  font-size: var(--text-caption);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-4);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: opacity 0.2s ease;
  box-shadow: none !important;
}

.ada-btn-forest:hover {
  opacity: 0.9;
}

.ada-btn-outline {
  background-color: transparent;
  color: var(--color-inkstone) !important;
  border-radius: var(--radius-buttons);
  padding: 12px 24px;
  font-size: var(--text-body-sm);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  text-decoration: none;
  border: var(--border-hairline);
  transition: background-color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  box-shadow: none !important;
}

.ada-btn-outline:hover {
  background-color: rgba(10, 11, 12, 0.04);
  border-color: rgba(10, 11, 12, 0.25);
}

.ada-btn-outline-white {
  background-color: transparent;
  color: #ffffff !important;
  border-radius: var(--radius-buttons);
  padding: 12px 24px;
  font-size: var(--text-body-sm);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: background-color 0.2s ease;
  cursor: pointer;
  box-shadow: none !important;
}

.ada-btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Announcement Bar (Top full-width dark utility bar) */
.ada-announcement-bar {
  background-color: var(--color-inkstone);
  color: #ffffff;
  padding: 8px 0;
  font-size: var(--text-body-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ada-announcement-bar a {
  color: #ffffff;
  text-decoration: none;
}

/* Navigation (Sticky 64px height with 32px radius pill or flat white bar) */
.ada-navbar {
  background-color: var(--surface-card);
  border-bottom: var(--border-hairline);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 1030;
}

.ada-navbar .nav-link {
  color: var(--color-inkstone) !important;
  font-size: 15px;
  padding: 8px 20px !important;
  transition: opacity 0.2s ease;
}

.ada-navbar .nav-link:hover {
  opacity: 0.65;
}

/* Hero Section (Frosted photographic gradient background) */
.ada-hero {
  background-color: var(--surface-canvas);
  position: relative;
  overflow: hidden;
  padding-top: var(--spacing-80);
  padding-bottom: var(--spacing-80);
  border-bottom: var(--border-hairline);
}

.ada-hero-bg {
  position: absolute;
  top: -20%;
  left: -20%;
  width: 140%;
  height: 140%;
  background: radial-gradient(circle at 20% 30%, rgba(172, 203, 249, 0.45) 0%, transparent 40%),
              radial-gradient(circle at 80% 40%, rgba(255, 187, 252, 0.35) 0%, transparent 45%),
              radial-gradient(circle at 50% 80%, rgba(252, 232, 139, 0.4) 0%, transparent 40%),
              radial-gradient(circle at 10% 80%, rgba(0, 84, 61, 0.12) 0%, transparent 35%);
  filter: blur(60px);
  opacity: 0.85;
  z-index: 1;
  pointer-events: none;
}

.ada-hero-content {
  position: relative;
  z-index: 2;
}

/* Floating Chat / Demo Card in Hero */
.ada-hero-demo-card {
  background-color: var(--surface-card);
  border: var(--border-hairline);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  box-shadow: none !important;
}

/* Logo / Trust Band */
.ada-trust-band {
  background-color: var(--surface-canvas);
  border-bottom: var(--border-hairline);
  padding: var(--spacing-32) 0;
}

.ada-trust-item {
  color: rgba(10, 11, 12, 0.65);
  font-size: var(--text-body-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
}

/* Section Intros (Centered, 36-48px headline, 18px subtext, no eyebrow decoration) */
.ada-section-intro {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-48);
}

.ada-section-intro h2 {
  font-size: clamp(28px, 3.5vw, var(--text-heading-lg));
  line-height: var(--leading-heading-lg);
  color: var(--color-inkstone);
  margin-bottom: var(--spacing-16);
}

.ada-section-intro p {
  font-size: 18px;
  line-height: 1.5;
  color: rgba(10, 11, 12, 0.65);
  margin: 0;
}

/* Form Inputs (4px radius, 1px hairline border) */
.ada-input, .ada-textarea, .ada-select,
.form-control, .form-select {
  border-radius: var(--radius-inputs) !important;
  border: var(--border-hairline) !important;
  background-color: var(--surface-card) !important;
  color: var(--color-inkstone) !important;
  padding: 12px 16px !important;
  font-size: var(--text-body-sm) !important;
  font-weight: 400 !important;
  box-shadow: none !important;
  transition: border-color 0.2s ease !important;
}

.ada-input:focus, .ada-textarea:focus, .ada-select:focus,
.form-control:focus, .form-select:focus {
  border-color: var(--color-inkstone) !important;
  outline: none !important;
  box-shadow: none !important;
}

/* Accordion (Flat cards, 8px radius, hairline borders) */
.ada-accordion .accordion-item {
  background-color: var(--surface-card);
  border: var(--border-hairline) !important;
  border-radius: var(--radius-cards) !important;
  margin-bottom: var(--spacing-12);
  overflow: hidden;
  box-shadow: none !important;
}

.ada-accordion .accordion-button {
  background-color: var(--surface-card) !important;
  color: var(--color-inkstone) !important;
  font-size: var(--text-body);
  font-weight: 400 !important;
  padding: 20px 24px;
  box-shadow: none !important;
  border: none;
}

.ada-accordion .accordion-button:not(.collapsed) {
  background-color: rgba(10, 11, 12, 0.02) !important;
  color: var(--color-inkstone) !important;
}

.ada-accordion .accordion-body {
  padding: 0 24px 20px 24px;
  font-size: var(--text-body-sm);
  color: rgba(10, 11, 12, 0.7);
  line-height: var(--leading-body);
}

/* Footer (Dark #0a0b0c Surface) */
.ada-footer {
  background-color: var(--color-inkstone);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-72) 0 var(--spacing-32);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.ada-footer h5, .ada-footer .footer-heading {
  color: #ffffff;
  font-size: var(--text-subheading);
  margin-bottom: var(--spacing-20);
}

.ada-footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}

.ada-footer a:hover {
  color: #ffffff;
}

/* Utility overrides for Bootstrap resets */
.bg-bone { background-color: var(--color-bone) !important; }
.bg-paper { background-color: var(--color-paper) !important; }
.bg-inkstone { background-color: var(--color-inkstone) !important; }
.text-inkstone { color: var(--color-inkstone) !important; }

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --section-gap: 48px;
    --card-padding: 16px;
  }
  .ada-section {
    padding-top: var(--spacing-48);
    padding-bottom: var(--spacing-48);
  }
  .ada-feature-card {
    height: 320px;
  }
}

/* Bootstrap Navbar Overrides (keep Ada flat white styling when .navbar is added) */
.ada-navbar.navbar {
  background-color: var(--surface-card) !important;
  box-shadow: none !important;
  padding: 14px 0;
}

.ada-navbar .navbar-toggler {
  border: none !important;
  box-shadow: none !important;
  padding: 8px;
  color: var(--color-inkstone);
}

.ada-navbar .navbar-toggler:focus {
  box-shadow: none !important;
  outline: none;
}

.ada-navbar .navbar-collapse {
  background-color: var(--surface-card);
}

@media (max-width: 991.98px) {
  .ada-navbar .navbar-collapse {
    padding: 16px 0;
    border-top: var(--border-hairline);
    margin-top: 14px;
  }
  .ada-navbar .navbar-collapse .navbar-nav {
    gap: 0 !important;
  }
  .ada-navbar .navbar-collapse .nav-link {
    padding: 12px 0 !important;
    border-bottom: var(--border-hairline-subtle);
  }
}

/* ========================================================================
   SCROLL ANIMATIONS — Fade-in on scroll (IntersectionObserver-driven)
   ======================================================================== */
@keyframes adaFadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes adaFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Elements waiting to animate */
.ada-animate {
  opacity: 0;
}

/* Elements that have been triggered (smooth 1.1s glide) */
.ada-animate.ada-visible {
  animation: adaFadeInUp 1.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Stagger delays for grid children (slower, natural rhythm) */
.ada-animate.ada-delay-1 { animation-delay: 0.15s; }
.ada-animate.ada-delay-2 { animation-delay: 0.30s; }
.ada-animate.ada-delay-3 { animation-delay: 0.45s; }
.ada-animate.ada-delay-4 { animation-delay: 0.60s; }

/* Counter animation helper */
.ada-count-up {
  display: inline-block;
}