/* ==========================================================================
   GLOBAL STYLES — That AI Guy
   ==========================================================================
   1.  Design tokens
   2.  Reset
   3.  Base elements
   4.  Typography
   5.  Layout
   6.  Components — Buttons
   7.  Components — Forms
   8.  Components — Alerts
   9.  Utilities
========================================================================== */

/* ==========================================================================
   Imports
========================================================================== */

@import url("grid.css");
@import url("utilities.css");
@import url("badges.css");
@import url("global-xtra.css");
/* slider.css is imported by theme.css — do not duplicate here */

/* ==========================================================================
   1. Design tokens
========================================================================== */

:root {
  /* Colour — light mode */
  --color-bg:                   #ffffff;
  --color-surface:              #f2f4f7;
  --color-border:               #dde1ea;
  --color-text:                 #1d1f24;
  --color-text-muted:           #5a6375;
  --color-btn-primary-bg:       #a1b1ca;
  --color-btn-primary-text:     #1d1f24;
  --color-btn-secondary-bg:     #3e3b1b;
  --color-btn-secondary-text:   #a1b1ca;
  --color-focus:                #4a7fcb;
  --color-alert-info-bg:        #eaf2ff;
  --color-alert-info-text:      #1d3a6b;
  --color-alert-success-bg:     #e8f9ef;
  --color-alert-success-text:   #1a5c35;
  --color-alert-warning-bg:     #fff8e6;
  --color-alert-warning-text:   #6b4800;
  --color-alert-error-bg:       #ffeaea;
  --color-alert-error-text:     #6b1a1a;

  /* Typography */
  --font-body:                  Arial, Helvetica, sans-serif;
  --font-heading:               Verdana, Arial, sans-serif;
  --font-size-base:             1.8rem;
  --font-size-xsm:              0.875rem;
  --font-size-sm:               1.2rem;
  --font-size-md:               1.8rem;
  --font-size-lg:               2rem;
  --font-size-xl:               2.25rem;
  --font-size-2xl:              2.5rem;
  --font-size-3xl:              2.75rem;
  --font-size-4xl:              3rem;
  --font-weight-light:          300;
  --font-weight-body:           400;
  --font-weight-heading:        700;
  --line-height-body:           1.5;
  --line-height-heading:        1.66;
  --line-height-component:      1.125;

  /* Spacing (rem) */
  --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;
  --letter-space:   0.085rem;
  --letter-space-lg:   0.125rem;
  --letter-space-sm:   0.01rem;

  /* Layout */
  --max-width:          1280px;
  --min-width:          320px;
  --min-element-width:  288px;
  --grid-gutter:        1rem;
  --grid-cols:          12;

  /* Border radius */
  --radius-sm:    0.25rem;
  --radius-md:    0.5rem;
  --radius-lg:    1rem;
  --radius-xl:    1.5rem;
  --radius-pill:  9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgb(0 0 0 / 0.08);
  --shadow-md:  0 4px 12px rgb(0 0 0 / 0.1);
  --shadow-lg:  0 8px 24px rgb(0 0 0 / 0.14);

  /* Transitions */
  --transition-fast:  150ms ease;
  --transition-base:  250ms ease;
  --transition-slow:  400ms ease;
}

/* Dark mode tokens are in @media (prefers-color-scheme: dark) blocks in theme.css.
No JS required — the browser applies them natively. */


/* ==========================================================================
   2. Reset
========================================================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 62.5%; 
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: var(--line-height-body);
  letter-spacing: 0.085em;
}

body {
  min-height: 100dvh;
  overflow-x: clip;
}


@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

img,
video,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}


/* ==========================================================================
   3. Base elements
========================================================================== */

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

::selection {
  background-color: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-8);
}


/* ==========================================================================
   4. Typography
========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  line-height: var(--line-height-heading);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-xsm); }

/* Desktop heading fluid overrides are in theme.css — do not add here */

p {
  font-size: var(--font-size-lg);
  max-width: 65ch; /* prose default — override in theme.css for promo context */
}

a {
  color: var(--color-text);
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.75;
}

a:active {
  opacity: 0.85;
}

a:visited {
  opacity: 0.9;
}

strong {
  font-weight: bold;
}

em {
  font-style: italic;
}

small {
  font-size: var(--font-size-xsm);
}

address {
  font-style: normal;
}

time {
  white-space: nowrap;
}

/* Prose content (long-form pages like privacy) */
.prose-content h1 { margin-bottom: var(--space-4); }
.prose-content h2 { margin-bottom: var(--space-3); margin-top: var(--space-10); }
.prose-content h3 { margin-bottom: var(--space-2); margin-top: var(--space-6); }
.prose-content p { margin-bottom: var(--space-4); }

.prose-content ul,
.prose-content ol {
  margin-bottom: var(--space-4);
  padding-inline-start: var(--space-6);
}

.prose-content li {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

.prose-header {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  padding-top: var(--space-12);
}

.prose-meta {
  color: var(--color-text-muted);
  font-size: var(--font-size-xsm);
  margin-block-start: var(--space-2);
}

.prose-footer-note {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-xsm);
  margin-top: var(--space-12);
  padding-top: var(--space-6);
}

.patent-notice {
  color: var(--color-text-muted);
  font-size: calc(var(--font-size-xsm) + 0.1rem);
  opacity: 0.5;
  padding-block: var(--space-4);
  text-align: center;
  max-width: 100%;
}


/* ==========================================================================
   5. Layout
========================================================================== */

/* Base space */
main {
  margin-inline: auto;
  min-width: var(--min-width);
  max-width: var(--max-width);
  padding: 1.2rem 1.2rem 0;
  position: relative;
  z-index: 1;
  overflow-x: clip; /* load-bearing — overflow-x: clip on sections alone doesn't reliably clip position:absolute descendants without a BFC */
}

@media (width >= 76.8rem) {
  main {
    padding: 2.4rem 2.4rem 0;
  }
}

.container {
  margin-inline: auto;
  max-width: var(--max-width);
  padding-inline: var(--grid-gutter);
  width: 100%;
}

@media (width >= 76.8rem) {
  .container {
    padding-inline: calc(var(--grid-gutter) * 2);
  }
}

@media (width >= 128rem) {
  .container {
    padding-inline: calc(var(--grid-gutter) * 4);
  }
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--grid-gutter);
}

.section {
  padding-block: var(--space-16);
}

@media (width >= 76.8rem) {
  .section {
    padding-block: var(--space-24);
  }
}

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

.section-header {
  margin-bottom: var(--space-12);
  margin-inline: auto;
  max-width: 48rem;
  text-align: center;
}

.section-title {
  margin-bottom: var(--space-3);
}

.section-subtitle {
  color: var(--color-text-muted);
}




/* ==========================================================================
   6. Components — Buttons
========================================================================== */

.btn {
  align-items: center;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: bold;
  gap: var(--space-2);
  justify-content: center;
  line-height: 1;
  min-height: 2.75rem;
  padding-block: 0.75em;
  padding-inline: 1.5em;
  text-decoration: none;
  transition: filter var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  filter: brightness(1.08);
  opacity: 1;
  transform: translateY(-1px);
}

.btn:active {
  filter: brightness(0.96);
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
}

.btn-secondary {
  background-color: var(--color-btn-secondary-bg);
  color: var(--color-btn-secondary-text);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-text);
  color: var(--color-text);
}

.btn-outline:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn-lg {
  font-size: var(--font-size-lg);
  min-height: 3.5rem;
  padding-block: 1em;
  padding-inline: 2em;
}

.btn-sm {
  font-size: var(--font-size-xsm);
  min-height: 2.25rem;
  padding-block: 0.5em;
  padding-inline: 1em;
}

.btn-icon-only {
  align-items: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  justify-content: center;
  min-height: 2.75rem;
  min-width: 2.75rem;
  padding: var(--space-2);
  transition: background-color var(--transition-fast);
}

.btn-icon-only:hover {
  background-color: var(--color-surface);
}

.btn-icon {
  flex-shrink: 0;
}


/* ==========================================================================
   7. Components — Forms
========================================================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-label {
  font-size: var(--font-size-xsm);
  font-weight: bold;
}

.form-input,
.form-select,
.form-textarea {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  display: block;
  font-family: var(--font-body);
  font-size: var(--font-size-lg);
  min-height: 3rem;
  padding-block: var(--space-3);
  padding-inline: var(--space-4);
  transition: border-color var(--transition-fast);
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-focus);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-hint {
  color: var(--color-text-muted);
  font-size: var(--font-size-xsm);
}

.form-error {
  color: var(--color-alert-error-text);
  font-size: var(--font-size-xsm);
}

.form-input.is-invalid,
.form-textarea.is-invalid {
  border-color: var(--color-alert-error-text);
}


/* ==========================================================================
   8. Components — Alerts
========================================================================== */

.alert {
  border-left: 4px solid currentColor;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  padding: var(--space-4) var(--space-5);
}

.alert-info {
  background-color: var(--color-alert-info-bg);
  color: var(--color-alert-info-text);
}

.alert-success {
  background-color: var(--color-alert-success-bg);
  color: var(--color-alert-success-text);
}

.alert-warning {
  background-color: var(--color-alert-warning-bg);
  color: var(--color-alert-warning-text);
}

.alert-error {
  background-color: var(--color-alert-error-bg);
  color: var(--color-alert-error-text);
}


/* ==========================================================================
   9. Utilities
========================================================================== */

/* Skip link — visually hidden until focused */
.u-skip-link {
  background-color: var(--color-bg);
  border: 2px solid var(--color-focus);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: bold;
  left: var(--space-4);
  padding: var(--space-3) var(--space-5);
  position: absolute;
  text-decoration: none;
  top: var(--space-4);
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
  z-index: 9999;
}

.u-skip-link:focus {
  transform: translateY(0);
}

/* Visually hidden — accessible but invisible */
.u-visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

/* Text alignment */
.u-text-center  { text-align: center; }
.u-text-start   { text-align: start; }
.u-text-end     { text-align: end; }

/* Display */
.u-block        { display: block; }
.u-inline-block { display: inline-block; }
.u-flex         { display: flex; }
.u-hidden       { display: none; }

/* Spacing */
.u-mt-auto      { margin-top: auto; }
.u-mb-0         { margin-bottom: 0; }

/* Color */
.u-text-muted   { color: var(--color-text-muted); }

/* Orientation */
@media (orientation: landscape) and (max-height: 500px) {
  .u-hide-landscape-mobile {
    display: none;
  }
}