/*
 * CensusGreeter Design System
 * Brand: Caregiver (primary) x Sage (secondary)
 * Derived via OKLCH color science → sRGB hex for Safari 14+ compat
 * Typography scale: Augmented Fourth (1.414)
 * All contrast ratios verified WCAG 2.1 AA minimum
 */

/* ============================================================
   1. COLOR TOKENS
   All colors derived from brand psychology constraints:
   - Trust Blue: hue 226°, warm-biased institutional blue
   - Sage Green: hue 157°, CIE L*=42.6, health/care credibility
   - Warm Amber: hue 40°, human warmth accent (max 15% of composition)
   - Neutrals: warm-biased grays (0.5-1% amber hue shift)
   ============================================================ */

:root {
  /* --- Trust Blue (Primary) ---
     HSL(226°, 48%, 40%) → OKLCH(0.46, 0.155, 226)
     Contrast vs #FFFFFF: 8.08:1 (AAA normal text)
     Contrast vs #FAFAF8: 7.73:1 */
  --color-primary: #354B96;
  --color-primary-hover: #293E83;      /* HSL(226°, 52%, 34%) — 9.95:1 */
  --color-primary-light: #EEF0F6;      /* HSL(226°, 30%, 95%) */
  --color-primary-focus: #4160C7;       /* HSL(226°, 55%, 52%) — focus rings */

  /* --- Sage Green (Secondary) ---
     HSL(157°, 48%, 30%) → CIE L*=42.6
     Contrast vs #FFFFFF: 5.87:1 (AA normal text) */
  --color-sage: #277155;
  --color-sage-hover: #236B4E;          /* L*=40.3, 6.39:1 */
  --color-sage-light: #ECF2F0;          /* HSL(157°, 20%, 94%) */

  /* --- Warm Amber (Accent) ---
     HSL(40°, 55%, 52%) — hue verified at 40.3°
     Dark text on amber: 6.27:1 */
  --color-amber: #C79B41;
  --color-amber-dark: #9B7426;          /* 4.27:1 on white — large text only */
  --color-amber-light: #F8F2E6;         /* HSL(40°, 60%, 94%) — callout bg */
  --color-amber-badge: #F5E7CA;         /* HSL(40°, 70%, 88%) — badge bg */

  /* --- Error (warm orange-red, not pure red) ---
     Per spec: "red triggers medical/alarm associations in senior care"
     HSL(10°, 60%, 44%) — 5.59:1 on white */
  --color-error: #B3432C;
  --color-error-light: #F8EDEB;         /* HSL(10°, 50%, 95%) */

  /* --- Warm Neutral Scale ---
     All grays include 3-6% saturation at hue 32-40°
     Prevents "cold tech product" feel */
  --color-gray-50:  #F7F7F6;   /* HSL(40°, 6%, 97%) */
  --color-gray-100: #F0F0EE;   /* HSL(40°, 6%, 94%) */
  --color-gray-200: #E4E3E1;   /* HSL(40°, 5%, 89%) */
  --color-gray-300: #CECCC9;   /* HSL(40°, 5%, 80%) */
  --color-gray-400: #A9A6A2;   /* HSL(40°, 4%, 65%) — 2.42:1, decorative only */
  --color-gray-500: #888580;   /* HSL(40°, 3%, 52%) — 3.68:1, large text/icons */
  --color-gray-600: #696662;   /* HSL(38°, 3%, 40%) — 5.71:1, secondary text */
  --color-gray-700: #4C4A47;   /* HSL(36°, 3%, 29%) — 8.83:1, body text */
  --color-gray-800: #343331;   /* HSL(34°, 3%, 20%) — 12.62:1, headings */
  --color-gray-900: #222120;   /* HSL(32°, 3%, 13%) — 16.07:1, maximum emphasis */

  /* --- Backgrounds ---
     2-3% warm tint, never pure white */
  --color-bg: #FAFAF8;
  --color-bg-alt: #F3F6F4;             /* Warm sage tint — alternating sections */
  --color-bg-card-warm: #F5F5F3;       /* Operator tier card bg */

  /* --- Links --- */
  --color-link: #3551AA;               /* 7.22:1 on white */
  --color-link-visited: #5E4590;        /* 7.69:1 on white */

  /* ============================================================
     2. TYPOGRAPHY
     Display: Fraunces (soft optical serif) — authority + warmth
     Body: Source Sans 3 (Adobe humanist sans) — clarity + readability
     Scale: Augmented Fourth (1.414)
     Audience: 40-65 years — prioritize legibility
     ============================================================ */

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Headings — Fraunces serif */
  --text-h1: 700 clamp(2.25rem, 5vw, 3.5rem)/1.2 var(--font-display);
  --text-h2: 600 clamp(1.75rem, 3.5vw, 2.5rem)/1.3 var(--font-display);
  --text-h3: 600 clamp(1.25rem, 2.5vw, 1.75rem)/1.4 var(--font-display);

  /* Body — Source Sans 3 */
  --text-body: 400 1rem/1.6 var(--font-body);
  --text-body-lg: 400 1.125rem/1.65 var(--font-body);
  --text-label: 500 0.875rem/1.4 var(--font-body);
  --text-caption: 400 0.75rem/1.5 var(--font-body);

  /* Price display — largest numeral on pricing cards */
  --text-price: 800 clamp(2.5rem, 5vw, 3.5rem)/1.1 var(--font-body);
  --text-price-suffix: 400 1rem/1.4 var(--font-body);

  /* ============================================================
     3. SPACING
     Base unit: 4px. All values are multiples of 4.
     Uses rem for accessibility (respects user font size).
     ============================================================ */

  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* Semantic spacing */
  --section-pad-y: var(--space-20);              /* 80px desktop */
  --section-pad-y-mobile: var(--space-12);       /* 48px mobile */
  --card-pad: var(--space-8);                    /* 32px desktop */
  --card-pad-mobile: var(--space-6);             /* 24px mobile */
  --form-gap: var(--space-4);                    /* 16px */
  --btn-pad-y: 0.875rem;                         /* 14px */
  --btn-pad-x: 1.75rem;                          /* 28px */

  /* ============================================================
     4. BORDER RADIUS
     ============================================================ */

  --radius-sm: 6px;     /* Inputs, badges */
  --radius-md: 12px;    /* Cards, modals */
  --radius-lg: 24px;    /* Hero sections */
  --radius-pill: 999px; /* Tags, status chips */

  /* ============================================================
     5. SHADOWS (warm-biased)
     Base color: rgba(45, 35, 20, ...) — warm brown, not neutral gray
     Three elevation levels
     ============================================================ */

  --shadow-1: 0 1px 3px rgba(45, 35, 20, 0.06),
              0 1px 2px rgba(45, 35, 20, 0.04);

  --shadow-2: 0 8px 24px -4px rgba(45, 35, 20, 0.10),
              0 4px 8px -2px rgba(45, 35, 20, 0.06);

  --shadow-3: 0 24px 48px -12px rgba(45, 35, 20, 0.16),
              0 8px 16px -4px rgba(45, 35, 20, 0.08);

  /* ============================================================
     6. MOTION
     Conservative for 40-65 audience.
     All motion < 300ms. No bouncing/parallax/auto-play.
     ============================================================ */

  --duration-micro: 150ms;    /* Hover states, validation borders */
  --duration-state: 250ms;    /* Card lifts, accordion open */
  --duration-modal: 200ms;    /* Modal fade-in */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);     /* Entrances */
  --ease-in: cubic-bezier(0.32, 0, 0.67, 0);      /* Exits */

  /* ============================================================
     7. LAYOUT
     ============================================================ */

  --container-max: 1200px;
  --container-pad: var(--space-6);               /* 24px desktop */
  --container-pad-mobile: var(--space-4);        /* 16px mobile */

  /* Breakpoints (for reference — used in media queries)
     Desktop:  > 1024px
     Tablet:   768px - 1024px
     Mobile:   < 768px */
}

/* ============================================================
   8. ACCESSIBILITY
   Focus indicators, reduced motion, minimum touch targets
   ============================================================ */

/* Focus ring — visible 3px ring in Trust Blue */
:focus-visible {
  outline: 3px solid var(--color-primary-focus);
  outline-offset: 2px;
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Minimum touch target (44x44px) for interactive elements on mobile */
@media (max-width: 768px) {
  button,
  a,
  input,
  select,
  textarea,
  [role="button"] {
    min-height: 44px;
  }
}

/* ============================================================
   9. BASE ELEMENT STYLES
   Applied to body, headings, links using the token system
   ============================================================ */

body {
  font: var(--text-body);
  color: var(--color-gray-700);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1 { font: var(--text-h1); color: var(--color-gray-900); }
h2 { font: var(--text-h2); color: var(--color-gray-900); }
h3 { font: var(--text-h3); color: var(--color-gray-800); }

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-micro) var(--ease-out);
}
a:visited { color: var(--color-link-visited); }
a:hover { color: var(--color-primary); }

/* ============================================================
   10. COMPONENT PRIMITIVES
   Reusable patterns used across pricing, checkout, demo, etc.
   ============================================================ */

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font: var(--text-label);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--duration-micro) var(--ease-out),
              box-shadow var(--duration-micro) var(--ease-out),
              transform var(--duration-micro) var(--ease-out);
  min-height: 44px;
}

.btn:active {
  transform: scale(0.98);
}

/* Filled (primary CTA) */
.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #FFFFFF;
}
.btn-primary:visited { color: #FFFFFF; }

/* Ghost (Operator tier CTA) */
.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-ghost:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}
.btn-ghost:visited { color: var(--color-primary); }

/* --- Atmosphere Utilities --- */

/* Subtle warm mesh gradient for section backgrounds */
.mesh-warm {
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse at 0% 0%, rgba(53, 75, 150, 0.04) 0px, transparent 50%),
    radial-gradient(ellipse at 100% 50%, rgba(39, 113, 85, 0.04) 0px, transparent 50%);
}

/* Fine noise overlay — add to any container that needs texture */
.noise-overlay { position: relative; }
.noise-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.025;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- Card --- */
.card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--card-pad);
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--duration-state) var(--ease-out),
              transform var(--duration-state) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

/* --- Pricing Card (highlighted tier) --- */
.card-highlighted {
  border-top: 4px solid var(--color-primary);
  margin: -4px;
  padding: calc(var(--card-pad) + 4px);
  position: relative;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font: var(--text-caption);
  font-weight: 600;
  border-radius: var(--radius-pill);
}

.badge-amber {
  background-color: var(--color-amber-badge);
  color: var(--color-gray-900);
}

.badge-sage {
  background-color: var(--color-sage-light);
  color: var(--color-sage);
}

/* --- Guarantee Badge (inline) --- */
.guarantee-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font: var(--text-caption);
  color: var(--color-sage);
}

.guarantee-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --- Section --- */
.section {
  padding: var(--section-pad-y) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

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

@media (max-width: 768px) {
  .section {
    padding: var(--section-pad-y-mobile) 0;
  }
  .card {
    padding: var(--card-pad-mobile);
  }
  .container {
    padding: 0 var(--container-pad-mobile);
  }
}

/* --- Trust Bar --- */
.trust-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.trust-bar-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font: var(--text-label);
  color: var(--color-gray-600);
}

.trust-bar-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-sage);
}

.trust-bar-divider {
  width: 1px;
  height: 24px;
  background-color: var(--color-gray-300);
}

@media (max-width: 768px) {
  .trust-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
  .trust-bar-divider {
    display: none;
  }
}

/* --- FAQ Accordion --- */
details {
  border-left: 4px solid transparent;
  transition: border-color var(--duration-state) var(--ease-out);
}

details[open] {
  border-left-color: var(--color-primary);
}

details summary {
  cursor: pointer;
  padding: var(--space-4);
  font: var(--text-body-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  list-style: none;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: '+';
  float: right;
  font-size: 1.25rem;
  color: var(--color-gray-400);
  transition: transform var(--duration-state) var(--ease-out);
}

details[open] summary::after {
  content: '-';
}

details > div {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* --- Form Inputs --- */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-field label {
  font: var(--text-label);
  color: var(--color-gray-700);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  font: var(--text-body);
  color: var(--color-gray-800);
  background-color: #FFFFFF;
  transition: border-color var(--duration-micro) var(--ease-out),
              box-shadow var(--duration-micro) var(--ease-out);
  min-height: 44px;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  outline: none;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-gray-400);
}

/* Validation states */
.form-field--error input,
.form-field--error select,
.form-field--error textarea {
  border-color: var(--color-error);
}

.form-field__error {
  font: var(--text-caption);
  color: var(--color-error);
}

/* --- Testimonial Card --- */
.testimonial-card {
  padding: var(--card-pad);
}

.testimonial-card blockquote {
  font: var(--text-body-lg);
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-gray-700);
  margin: 0 0 var(--space-4);
}

.testimonial-card cite {
  font: var(--text-label);
  font-style: normal;
  color: var(--color-gray-600);
}

/* --- Pricing Feature List --- */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font: var(--text-body);
  color: var(--color-gray-700);
}

.feature-list li svg {
  width: 20px;
  height: 20px;
  color: var(--color-sage);
  flex-shrink: 0;
  margin-top: 2px;
}