/* ============================================================
   Dryer Vent Safety Council
   Stylesheet v1.0
   Implements the DVSC Visual Identity Stylesheet.
   ============================================================ */

/* --- 1. Design tokens ----------------------------------------- */

:root {
  /* Primary — institutional */
  --anchor-navy:   #003556;
  --deep-navy:     #002A47;
  --mid-blue:      #3E6E91;

  /* Accent — seal */
  --seal-burgundy:    #8A2024;
  --deep-burgundy:    #46121D;
  --reverse-burgundy: #C45340;

  /* Neutrals */
  --paper: #FAF8F4;
  --mist:  #EEF3F6;
  --stone: #D6DCE2;
  --slate: #5B6770;
  --ink:   #1A2A35;

  /* Type families */
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans:  'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing (8px base) */
  --s-1:  8px;
  --s-2:  16px;
  --s-3:  24px;
  --s-4:  32px;
  --s-6:  48px;
  --s-8:  64px;
  --s-12: 96px;

  /* Layout */
  --measure: 65ch;
  --max:     1180px;
  --gutter:  32px;
}

/* --- 2. Reset and base ---------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--mid-blue);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 120ms ease;
}

a:hover {
  color: var(--deep-navy);
}

a:focus-visible {
  outline: 2px solid var(--anchor-navy);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--anchor-navy);
  color: #fff;
  padding: var(--s-1) var(--s-2);
  font-family: var(--font-sans);
  z-index: 100;
}
.skip:focus {
  left: var(--s-2);
  top: var(--s-2);
}

/* --- 3. Typography -------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--anchor-navy);
  margin: 0 0 var(--s-3);
  letter-spacing: -0.005em;
}

h1 {
  font-size: clamp(36px, 4.2vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.2;
}

h3 {
  font-size: 22px;
  line-height: 1.3;
}

p {
  margin: 0 0 var(--s-3);
  max-width: var(--measure);
}

.lead {
  font-family: var(--font-serif);
  font-size: clamp(19px, 1.6vw, 22px);
  line-height: 1.5;
  color: var(--slate);
  font-weight: 400;
  max-width: 60ch;
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--seal-burgundy);
  display: block;
  margin-bottom: var(--s-2);
}

.caption {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

/* Italics reserved for motto, document titles, foreign terms */
em, i {
  font-style: italic;
}

.motto {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--seal-burgundy);
}

/* --- 4. Layout primitives ------------------------------------- */

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

.section {
  padding-block: var(--s-12);
}

.section--tight {
  padding-block: var(--s-8);
}

.section--mist {
  background: var(--mist);
}

.section--navy {
  background: var(--anchor-navy);
  color: #fff;
}

.section--navy h1,
.section--navy h2,
.section--navy h3 {
  color: #fff;
}

.section--navy .lead {
  color: rgba(255, 255, 255, 0.85);
}

.section--navy a {
  color: #fff;
  text-decoration-color: rgba(255, 255, 255, 0.5);
}

.section--navy a:hover {
  text-decoration-color: #fff;
}

.rule {
  border: 0;
  border-top: 1px solid var(--stone);
  margin: var(--s-6) 0;
}

.rule--navy {
  border-top: 2px solid var(--anchor-navy);
  margin: var(--s-4) 0;
}

/* --- 5. Header / nav ------------------------------------------ */

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--stone);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding-block: var(--s-2);
  min-height: 72px;
}

.lockup {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  text-decoration: none;
  color: var(--anchor-navy);
}

.lockup__mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.lockup__wordmark {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.15;
  letter-spacing: -0.005em;
  color: var(--anchor-navy);
}

.lockup__wordmark span {
  display: block;
}
.logo {width: 360px; height: auto; margin-left: -40px;}
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.site-nav a {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--anchor-navy);
  border-bottom-color: var(--anchor-navy);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--stone);
  border-radius: 4px;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--anchor-navy);
  cursor: pointer;
}

@media (max-width: 880px) {
  .logo {width: 360px; height: auto; margin-left: 0px;}
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--stone);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--s-2) var(--gutter);
  }
  .site-nav.open {
    display: flex;
  }
  .site-nav a {
    padding: var(--s-2) 0;
    border-bottom: 1px solid var(--stone);
  }
  .site-nav a:last-child {
    border-bottom: 0;
  }
  .nav-toggle {
    display: inline-block;
  }
}

/* --- 6. Hero -------------------------------------------------- */

.hero {
  padding-block: var(--s-12) var(--s-8);
}

.hero__content {
  max-width: 760px;
}

.hero h1 {
  margin-bottom: var(--s-3);
}

/* --- 7. Pillar cards ------------------------------------------ */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
  margin-top: var(--s-6);
}

@media (max-width: 880px) {
  .pillars { grid-template-columns: 1fr; }
}

.pillar {
  background: var(--paper);
  border: 1px solid var(--stone);
  padding: var(--s-4);
  display: flex;
  flex-direction: column;
}

.pillar__num {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: var(--s-2);
}

.pillar h3 {
  margin-bottom: var(--s-2);
}

.pillar p {
  color: var(--ink);
  margin-bottom: var(--s-3);
}

.pillar a {
  margin-top: auto;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--anchor-navy);
  text-decoration: none;
  border-bottom: 1px solid var(--anchor-navy);
  align-self: flex-start;
  padding-bottom: 2px;
}

.pillar a:hover {
  color: var(--deep-navy);
}

/* --- 8. Two-column splits ------------------------------------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-8);
  align-items: start;
}

@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; gap: var(--s-6); }
}

/* --- 9. Buttons / calls-to-action ----------------------------- */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 2px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 120ms ease, color 120ms ease;
  cursor: pointer;
}

.btn--primary {
  background: var(--anchor-navy);
  color: #fff;
}

.btn--primary:hover {
  background: var(--deep-navy);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--anchor-navy);
  border-color: var(--anchor-navy);
}

.btn--ghost:hover {
  background: var(--anchor-navy);
  color: #fff;
}

/* Reserved for true editorial/seal moments only */
.btn--seal {
  background: var(--seal-burgundy);
  color: #fff;
}

.btn--seal:hover {
  background: var(--deep-burgundy);
  color: #fff;
}

/* --- 10. Callout (left border, no full enclosure) ------------- */

.callout {
  background: var(--mist);
  border-left: 3px solid var(--anchor-navy);
  padding: var(--s-3) var(--s-4);
  margin: var(--s-4) 0;
}

.callout p:last-child { margin-bottom: 0; }

/* --- 11. Article / long-form ---------------------------------- */

.article {
  max-width: var(--measure);
}

.article h2 {
  margin-top: var(--s-6);
}

.article h3 {
  margin-top: var(--s-4);
}

.article ul,
.article ol {
  max-width: var(--measure);
  padding-left: 1.4em;
  margin: 0 0 var(--s-3);
}

.article li {
  margin-bottom: var(--s-1);
}

/* --- 12. Footer ----------------------------------------------- */

.site-footer {
  background: var(--anchor-navy);
  color: rgba(255, 255, 255, 0.85);
  padding-block: var(--s-8) var(--s-6);
  font-size: 15px;
}

.site-footer h4 {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #fff;
  margin: 0 0 var(--s-2);
}

.site-footer a {
  color: #fff;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.6);
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin-bottom: var(--s-1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--s-6);
  margin-bottom: var(--s-6);
}

@media (max-width: 880px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-4);
  }
}

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

.footer-brand p {
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--s-2);
  max-width: 36ch;
}

.footer-legal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding-top: var(--s-4);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

.footer-legal .motto {
  color: var(--reverse-burgundy);
}

/* --- 13. Public-facing voice adjustments ---------------------- */
/* Used on the homeowner / public safety pages.                  */
/* Shorter measure, larger leading on body for casual readers.   */

.public p {
  font-size: 18px;
  line-height: 1.7;
  max-width: 58ch;
}

.public .lead {
  font-size: clamp(20px, 1.7vw, 24px);
}

/* --- 14. Utility ---------------------------------------------- */

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.text-slate { color: var(--slate); }