/* ======================================================
   Anstey Apps — Global Stylesheet
   ====================================================== */

/* --- Fontshare CDN loaded in HTML <head> --- */

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: 5rem;
}

/* === Design Tokens === */
:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* === Light Mode (default) === */
:root, [data-theme="light"] {
  --color-bg: #f7f6f3;
  --color-surface: #ffffff;
  --color-surface-2: #faf9f7;
  --color-surface-offset: #f0efec;
  --color-divider: #e2e0db;
  --color-border: #d4d1ca;

  --color-text: #1a2a27;
  --color-text-muted: #5c6b68;
  --color-text-faint: #9aa5a2;
  --color-text-inverse: #f7f6f3;

  --color-primary: #145f59;
  --color-primary-hover: #0e4a45;
  --color-primary-active: #0a3632;
  --color-primary-light: #e8f0ef;
  --color-primary-highlight: #cedcd8;

  --shadow-sm: 0 1px 2px rgba(20, 95, 89, 0.04);
  --shadow-md: 0 4px 12px rgba(20, 95, 89, 0.06);
  --shadow-lg: 0 12px 32px rgba(20, 95, 89, 0.08);
}

/* === Dark Mode === */
[data-theme="dark"] {
  --color-bg: #141a19;
  --color-surface: #1a2220;
  --color-surface-2: #1f2826;
  --color-surface-offset: #1a2220;
  --color-divider: #2a3533;
  --color-border: #344340;

  --color-text: #d4dbd9;
  --color-text-muted: #8b9996;
  --color-text-faint: #5c6b68;
  --color-text-inverse: #141a19;

  --color-primary: #5aada5;
  --color-primary-hover: #7ac0b9;
  --color-primary-active: #99d1cb;
  --color-primary-light: #1f2e2c;
  --color-primary-highlight: #253634;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141a19;
    --color-surface: #1a2220;
    --color-surface-2: #1f2826;
    --color-surface-offset: #1a2220;
    --color-divider: #2a3533;
    --color-border: #344340;

    --color-text: #d4dbd9;
    --color-text-muted: #8b9996;
    --color-text-faint: #5c6b68;
    --color-text-inverse: #141a19;

    --color-primary: #5aada5;
    --color-primary-hover: #7ac0b9;
    --color-primary-active: #99d1cb;
    --color-primary-light: #1f2e2c;
    --color-primary-highlight: #253634;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  }
}

/* === Body === */
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.15;
}
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(20, 95, 89, 0.18);
  color: var(--color-text);
}
[data-theme="dark"] ::selection {
  background: rgba(90, 173, 165, 0.25);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@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;
  }
}

button { cursor: pointer; background: none; border: none; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

/* === Layout === */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-4); }
}

/* === Header / Nav === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-4) 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
}

.site-logo svg { flex-shrink: 0; }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.site-nav a:hover { color: var(--color-primary); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(280px, 80vw);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-surface);
    border-left: 1px solid var(--color-divider);
    padding: var(--space-20) var(--space-6) var(--space-6);
    transform: translateX(100%);
    transition: transform 250ms cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 200;
    box-shadow: var(--shadow-lg);
  }
  .site-nav.is-open { transform: translateX(0); }
  .site-nav a {
    display: block;
    padding: var(--space-3) 0;
    font-size: var(--text-base);
    width: 100%;
    border-bottom: 1px solid var(--color-divider);
  }
  .nav-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: var(--text-lg);
  }
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 199;
    display: none;
  }
  .nav-overlay.is-open { display: block; }
}

@media (min-width: 769px) {
  .nav-close { display: none; }
  .nav-overlay { display: none !important; }
}

/* === Sections === */
.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.section-divider {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: 0;
}

/* === Hero === */
.hero {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  text-align: center;
}

.hero h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.hero .subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  font-weight: 400;
  line-height: 1.5;
}

/* === App Cards === */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .apps-grid { grid-template-columns: 1fr; }
}

.app-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.app-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.app-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.app-card .app-tagline {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.app-card p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.6;
}

.app-card .app-price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.app-card .app-price span {
  font-weight: 400;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.store-badges {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.store-badge:hover {
  background: var(--color-primary);
}

.app-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  margin-top: auto;
}
.app-card-link:hover {
  color: var(--color-primary-hover);
}
.app-card-link svg {
  display: inline-block;
  width: 16px;
  height: 16px;
}

/* === Demo Button === */
.app-card-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: auto;
}
.app-card-actions .app-card-link {
  margin-top: 0;
}
.btn-demo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}
.btn-demo:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}
.btn-demo:active {
  transform: scale(0.97);
}

/* === Trust Signals === */
.trust-section {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.trust-headline {
  font-size: var(--text-xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.trust-subtext {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  font-size: var(--text-base);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .trust-grid { grid-template-columns: 1fr; }
}

.trust-item {
  text-align: center;
  padding: var(--space-4);
}

.trust-item-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: var(--space-3);
}

.trust-item h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.trust-item p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-inline: auto;
}

/* === About === */
.about-content {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
}

.about-content h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.about-content p {
  color: var(--color-text-muted);
  margin-inline: auto;
  line-height: 1.7;
}

/* === Contact === */
.contact-section {
  text-align: center;
}

.contact-section h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.contact-links {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--text-base);
}
.contact-link:hover { color: var(--color-primary-hover); }

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6) 0;
  text-align: center;
}

.site-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-inline: auto;
}
.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.site-footer a:hover { color: var(--color-primary); }

/* === Subpage Styles === */
.subpage-hero {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
  text-align: center;
  border-bottom: 1px solid var(--color-divider);
}

.subpage-hero .app-icon-large {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.subpage-hero h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.subpage-hero .tagline {
  font-size: var(--text-lg);
  color: var(--color-primary);
  font-weight: 600;
}

/* Content sections on subpages */
.content-block {
  max-width: 720px;
  margin-inline: auto;
}

.content-block h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.content-block h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.content-block p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.content-block ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
}

.content-block li {
  padding: var(--space-3) 0;
  padding-left: var(--space-6);
  position: relative;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-divider);
}

.content-block li:last-child { border-bottom: none; }

.content-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--space-3) + 0.55em);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* Research citations */
.research-list {
  margin-bottom: var(--space-6);
}

.research-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Pricing block */
.pricing-block {
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.pricing-block .price {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.pricing-block .price-sub {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

/* Disclaimer banner */
.disclaimer {
  text-align: center;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 720px;
  margin-inline: auto;
}

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-8);
}
.back-link:hover { color: var(--color-primary); }
.back-link svg { width: 16px; height: 16px; display: inline-block; }
