/* ==========================================================================
   Elder CPA style guide: design tokens and base styles.
   Every other stylesheet consumes these variables. Edit a token here and the
   whole page restyles. Contrast for every pairing is computed by
   accessibility/contrast.config.json (scripts/contrast-check.mjs).
   ========================================================================== */

/* ---- Font (self-hosted, SIL Open Font License) -------------------------- */
@font-face {
  font-family: "Libre Franklin";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/libre-franklin-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* ---- Color: palette ---------------------------------------------------- */
  --color-white: #ffffff;
  --color-stone: #f3f4f6;          /* quiet alternate band */
  --color-ink: #14202e;            /* headings and body text */
  --color-ink-muted: #4a5563;      /* secondary text */
  --color-rule: #d5d9df;           /* decorative hairlines only */
  --color-field-border: #6b7480;   /* form field edges */
  --color-navy: #0f2a47;           /* brand: hero, footer, primary action */
  --color-navy-deep: #0a1f36;      /* primary hover */
  --color-navy-ink: #071627;       /* primary active */
  --color-on-navy: #ffffff;
  --color-on-navy-muted: #c3cfdc;
  --color-rule-on-navy: #2c4664;   /* decorative hairlines on navy */
  --color-accent: #1b6fb5;         /* links and the thin accent bar */
  --color-accent-hover: #12558c;
  --color-accent-on-navy: #8ec5f2; /* focus ring on navy */
  --color-error: #b42318;

  /* ---- Color: semantic roles --------------------------------------------- */
  --color-bg: var(--color-white);
  --color-text: var(--color-ink);
  --color-text-muted: var(--color-ink-muted);
  --color-heading: var(--color-ink);
  --color-link: var(--color-accent);
  --color-link-hover: var(--color-accent-hover);
  --color-primary: var(--color-navy);
  --color-on-primary: var(--color-white);
  --color-primary-hover: var(--color-navy-deep);
  --color-primary-active: var(--color-navy-ink);
  --color-focus: var(--color-accent);
  --color-focus-on-navy: var(--color-accent-on-navy);
  --color-field: var(--color-white);
  --color-border-field: var(--color-field-border);
  --color-surface-dark: var(--color-navy);
  --color-on-dark: var(--color-on-navy);

  /* ---- Type ---------------------------------------------------------------- */
  --font-sans: "Libre Franklin", "Franklin Gothic Medium", "Segoe UI", sans-serif;
  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-xl: clamp(1.25rem, 1.15rem + 0.4vw, 1.4375rem);
  --text-2xl: clamp(1.75rem, 1.45rem + 1.2vw, 2.375rem);
  --text-3xl: clamp(2.25rem, 1.7rem + 2.3vw, 3.5rem);
  --leading-tight: 1.12;
  --leading-body: 1.65;

  /* ---- Space ---------------------------------------------------------------- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: clamp(4.5rem, 3.5rem + 4vw, 7.5rem);
  --gutter: clamp(1.25rem, 0.5rem + 3vw, 2.5rem);
  --container: 72rem;
  --radius: 2px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  color: var(--color-heading);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.015em;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
p + p { margin-top: var(--space-4); }
ul, ol { margin: 0; padding: 0; }
img, picture { display: block; max-width: 100%; }
img { height: auto; }
dl, dd { margin: 0; }

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}
a:hover { color: var(--color-link-hover); }

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

.container {
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-weight: 600;
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; color: var(--color-on-primary); }

/* ---- Buttons: solid rectangles ------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.75rem;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.button:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); color: var(--color-on-primary); }
.button:active { background: var(--color-primary-active); border-color: var(--color-primary-active); }
.button:disabled { opacity: 0.72; cursor: not-allowed; }

/* White button for navy grounds. */
.button-light {
  border-color: var(--color-white);
  background: var(--color-white);
  color: var(--color-navy);
}
.button-light:hover { border-color: var(--color-stone); background: var(--color-stone); color: var(--color-navy); }
.button-light:active { border-color: var(--color-rule); background: var(--color-rule); color: var(--color-navy); }

/* Outline button for navy grounds. */
.button-outline-light {
  border-color: var(--color-white);
  background: transparent;
  color: var(--color-white);
}
.button-outline-light:hover { background: var(--color-white); border-color: var(--color-white); color: var(--color-navy); }
.button-outline-light:active { background: var(--color-stone); border-color: var(--color-stone); color: var(--color-navy); }