/* ============================================================
   MATI BHADRA SAGARA — BASE
   css/base.css

   Minimal modern reset + global typography defaults.
   Consumes tokens from design-system.css only.
   No hardcoded hex values or unitless sizes.
   ============================================================ */


/* ─────────────────────────────────────────────────────────────
   RESET
   ───────────────────────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  /* Fluid root font size — prevents iOS tap-to-zoom on inputs */
  font-size: 100%;            /* 1rem = 16px browser default */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Disable smooth scroll when user prefers reduced motion —
     design-system.css also overrides transition/animation globally */
}

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

body {
  min-height: 100dvh;         /* fills the viewport; dvh handles mobile chrome bars */
  background-color: var(--color-bg-primary);
  color: var(--color-text-body);
  font-family: var(--font-sans);
  font-size: var(--type-size-body-m);       /* 18px */
  line-height: var(--type-lh-body-m);       /* ~29px */
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}


/* ─────────────────────────────────────────────────────────────
   MEDIA — typography size scale (mobile → tablet → desktop)

   Mobile  (base):   already sized by the tokens above
   Tablet  (≥769px): slightly up
   Desktop (≥1025px): full desktop scale (token defaults)

   We adjust only where the Figma spec shows a material size
   shift; unchanged scales are left to inherit.
   ───────────────────────────────────────────────────────────── */

/* Mobile overrides — type tokens are defined at desktop scale in
   design-system.css; we scale them down here for mobile. */

:root {
  /* Display / H1 */
  --type-size-display:   2.75rem;   /* 44px mobile  (96px desktop) */
  --type-lh-display:     2.875rem;  /* 46px */
  --type-size-h1-l:      2.25rem;   /* 36px mobile  (72px desktop) */
  --type-lh-h1-l:        2.375rem;  /* 38px */

  /* H2 variants */
  --type-size-h2-xl:     2rem;      /* 32px mobile  (60px desktop) */
  --type-lh-h2-xl:       2.25rem;
  --type-size-h2-l:      1.75rem;   /* 28px mobile  (48px desktop) */
  --type-lh-h2-l:        2.25rem;
  --type-size-h2-m:      1.5rem;    /* 24px mobile  (36px desktop) */
  --type-lh-h2-m:        2rem;
  --type-size-h2-s:      1.25rem;   /* 20px mobile  (30px desktop) */
  --type-lh-h2-s:        1.75rem;

  /* Quote sizes */
  --type-size-quote-xl:  1.75rem;   /* 28px mobile  (60px desktop) */
  --type-lh-quote-xl:    2.25rem;
  --type-size-quote-l:   1.5rem;    /* 24px mobile  (48px desktop) */
  --type-lh-quote-l:     2rem;
  --type-size-quote-m:   1.25rem;   /* 20px mobile  (30px desktop) */
  --type-lh-quote-m:     1.75rem;

  /* Body large (hero subtitle) */
  --type-size-body-l:    1.125rem;  /* 18px mobile  (24px desktop) */
  --type-lh-body-l:      1.75rem;
}

@media (min-width: 480px) {
  :root {
    --type-size-display:   3.5rem;   /* 56px */
    --type-lh-display:     3.625rem;
    --type-size-h1-l:      2.75rem;  /* 44px */
    --type-lh-h1-l:        2.875rem;
    --type-size-h2-xl:     2.5rem;   /* 40px */
    --type-lh-h2-xl:       2.875rem;
    --type-size-h2-l:      2.125rem; /* 34px */
    --type-lh-h2-l:        2.625rem;
    --type-size-quote-xl:  2.25rem;  /* 36px */
    --type-lh-quote-xl:    2.625rem;
    --type-size-quote-l:   1.875rem; /* 30px */
    --type-lh-quote-l:     2.375rem;
  }
}

@media (min-width: 769px) {
  :root {
    --type-size-display:   4.5rem;   /* 72px */
    --type-lh-display:     4.625rem;
    --type-size-h1-l:      3.5rem;   /* 56px */
    --type-lh-h1-l:        3.625rem;
    --type-size-h2-xl:     3.25rem;  /* 52px */
    --type-lh-h2-xl:       3.5rem;
    --type-size-h2-l:      2.625rem; /* 42px */
    --type-lh-h2-l:        3.25rem;
    --type-size-h2-m:      2rem;     /* 32px */
    --type-lh-h2-m:        2.5rem;
    --type-size-h2-s:      1.625rem; /* 26px */
    --type-lh-h2-s:        2.125rem;
    --type-size-quote-xl:  3rem;     /* 48px */
    --type-lh-quote-xl:    3.25rem;
    --type-size-quote-l:   2.5rem;   /* 40px */
    --type-lh-quote-l:     2.75rem;
    --type-size-quote-m:   1.625rem; /* 26px */
    --type-lh-quote-m:     2.125rem;
    --type-size-body-l:    1.25rem;  /* 20px */
    --type-lh-body-l:      1.875rem;
  }
}

@media (min-width: 1025px) {
  :root {
    /* Restore full desktop scale defined in design-system.css */
    --type-size-display:   6rem;
    --type-lh-display:     6rem;
    --type-size-h1-l:      4.5rem;
    --type-lh-h1-l:        4.5rem;
    --type-size-h2-xl:     3.75rem;
    --type-lh-h2-xl:       3.75rem;
    --type-size-h2-l:      3rem;
    --type-lh-h2-l:        3.75rem;
    --type-size-h2-m:      2.25rem;
    --type-lh-h2-m:        2.5rem;
    --type-size-h2-s:      1.875rem;
    --type-lh-h2-s:        2.25rem;
    --type-size-quote-xl:  3.75rem;
    --type-lh-quote-xl:    3.75rem;
    --type-size-quote-l:   3rem;
    --type-lh-quote-l:     3rem;
    --type-size-quote-m:   1.875rem;
    --type-lh-quote-m:     2.25rem;
    --type-size-body-l:    1.5rem;
    --type-lh-body-l:      2rem;
  }
}


/* ─────────────────────────────────────────────────────────────
   HEADINGS
   ───────────────────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;           /* Lora regular — no bold headings per spec */
  color: var(--color-brand-rust);
  text-wrap: balance;         /* prevent orphans */
}

h1 { font-size: var(--type-size-h2-l); line-height: var(--type-lh-h2-l); }
h2 { font-size: var(--type-size-h2-m); line-height: var(--type-lh-h2-m); }
h3 { font-size: var(--type-size-h3);   line-height: var(--type-lh-h3);   }
h4 { font-size: var(--type-size-h3-s); line-height: var(--type-lh-h3-s); }
h5 { font-size: var(--type-size-body-m); line-height: var(--type-lh-body-m); }
h6 { font-size: var(--type-size-body);   line-height: var(--type-lh-body);   }

/* Page-level H1s rendered by page CSS via explicit classes —
   these defaults are for structural headings inside prose blocks. */


/* ─────────────────────────────────────────────────────────────
   BODY COPY ELEMENTS
   ───────────────────────────────────────────────────────────── */

p {
  max-width: 72ch;            /* comfortable prose line length */
  text-wrap: pretty;          /* reduce widow lines */
}

/* Full-width paragraphs (e.g. hero subtitles) override max-width via class */
p.full-width { max-width: none; }

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--type-size-fine);
  line-height: 1.5;
}


/* ─────────────────────────────────────────────────────────────
   LINKS
   ───────────────────────────────────────────────────────────── */

a {
  color: var(--color-brand-rust);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-cta-hover);
}

/* Suppress underline on components that style their own links */
a:where(
  .btn,
  .nav__link,
  .footer__link,
  .card__link,
  [class*="__link"]
) {
  text-decoration: none;
}


/* ─────────────────────────────────────────────────────────────
   LISTS
   ───────────────────────────────────────────────────────────── */

ul, ol {
  padding-inline-start: var(--space-5);
}

li {
  line-height: var(--type-lh-body-m);
}

/* Strip list style when used as UI containers */
ul:where([role="list"]),
ol:where([role="list"]) {
  list-style: none;
  padding-inline-start: 0;
}


/* ─────────────────────────────────────────────────────────────
   IMAGES & MEDIA
   ───────────────────────────────────────────────────────────── */

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

img {
  /* Prevent content-layout shift before image loads */
  content-visibility: auto;
}

/* Decorative images — no alt text needed, hidden from AT */
img[alt=""] {
  pointer-events: none;
}


/* ─────────────────────────────────────────────────────────────
   FORM ELEMENTS — global resets
   Detailed component styles live in layout.css / page CSS.
   ───────────────────────────────────────────────────────────── */

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: var(--font-sans);
  font-size: var(--type-size-body-m);
  color: var(--color-text-body);
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-muted);
  background-color: var(--color-bg-white);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
  font-size: var(--type-size-body-s);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-brand-rust);
  box-shadow: 0 0 0 3px rgba(147, 61, 4, 0.15);
}

textarea {
  resize: vertical;
  min-height: 9rem;
}

label {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--type-size-label);
  letter-spacing: var(--type-ls-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

fieldset {
  border: none;
}

legend {
  font-family: var(--font-sans);
  font-size: var(--type-size-body-s);
  color: var(--color-text-muted);
}


/* ─────────────────────────────────────────────────────────────
   INTERACTIVE — focus ring (WCAG 2.1 AA)
   Applied globally; suppressed on pointer interaction via
   :focus-visible. This is the only place focus rings are
   defined — never override to outline: none without a
   visible alternative.
   ───────────────────────────────────────────────────────────── */

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

/* Remove focus ring from mouse/touch interactions */
:focus:not(:focus-visible) {
  outline: none;
}


/* ─────────────────────────────────────────────────────────────
   HORIZONTAL RULE
   ───────────────────────────────────────────────────────────── */

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


/* ─────────────────────────────────────────────────────────────
   BLOCKQUOTE
   ───────────────────────────────────────────────────────────── */

blockquote {
  border-inline-start: 3px solid var(--color-border-accent);
  padding-inline-start: var(--space-5);
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--type-size-quote-s);
  line-height: var(--type-lh-quote-s);
  color: var(--color-brand-deep);
}


/* ─────────────────────────────────────────────────────────────
   TABLE
   ───────────────────────────────────────────────────────────── */

table {
  border-collapse: collapse;
  width: 100%;
}

th, td {
  padding: var(--space-3) var(--space-4);
  text-align: start;
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: var(--type-size-body-s);
}

th {
  font-weight: 700;
  color: var(--color-text-primary);
}


/* ─────────────────────────────────────────────────────────────
   SELECTION
   ───────────────────────────────────────────────────────────── */

::selection {
  background-color: rgba(147, 61, 4, 0.15);
  color: var(--color-text-primary);
}


/* ─────────────────────────────────────────────────────────────
   SCROLL REVEAL — progressive enhancement
   Hidden state ONLY applies when <html class="js"> is present.
   main.js adds that class immediately on load, then uses
   IntersectionObserver to add .is-visible when elements enter
   the viewport.
   Without JS (or before main.js runs), content is fully visible.
   ───────────────────────────────────────────────────────────── */

.js .reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--transition-reveal),
              transform var(--transition-reveal);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.js .reveal--left  { transform: translateX(-1.5rem); }
.js .reveal--right { transform: translateX(1.5rem);  }

.js .reveal--left.is-visible,
.js .reveal--right.is-visible {
  transform: none;
}

/* Staggered children */
.js .reveal-group > * {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--transition-reveal),
              transform var(--transition-reveal);
}

.js .reveal-group.is-visible > * { opacity: 1; transform: none; }
.js .reveal-group.is-visible > *:nth-child(1) { transition-delay: 0ms;   }
.js .reveal-group.is-visible > *:nth-child(2) { transition-delay: 80ms;  }
.js .reveal-group.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.js .reveal-group.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.js .reveal-group.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.js .reveal-group.is-visible > *:nth-child(6) { transition-delay: 400ms; }