/* ===========================================================
   TREAD AUTOMOTIVE — shared styling for policy pages
   Restraint ground + Zima Blue accent. Glacial Indifference throughout.
   Used by privacy.html, cookies.html, terms.html, ai.html.
   =========================================================== */

/* Glacial Indifference — self-hosted. Files live in /assets/fonts/.
   Falls back to Century Gothic until they are present. */
@font-face {
    font-family: 'Glacial Indifference';
    src: url('fonts/GlacialIndifference-Regular.woff2') format('woff2'),
         url('fonts/GlacialIndifference-Regular.woff') format('woff');
    font-weight: 400 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Glacial Indifference';
    src: url('fonts/GlacialIndifference-Bold.woff2') format('woff2'),
         url('fonts/GlacialIndifference-Bold.woff') format('woff');
    font-weight: 600 700;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Glacial Indifference';
    src: url('fonts/GlacialIndifference-Italic.woff2') format('woff2'),
         url('fonts/GlacialIndifference-Italic.woff') format('woff');
    font-weight: 400 500;
    font-style: italic;
    font-display: swap;
}

:root {
    --ink:            #1A1A18;
    --charcoal:       #1F1F1D;
    --slate:          #5A5A56;
    --stone:          #8A8A86;
    --platinum:       #BDBDB7;
    --concrete:       #DEDED8;
    --linen:          #F2F0EA;
    --paper:          #F6F4EE;

    --zima:           #5BC2E7;   /* Zima Blue — the one accent, everywhere */

    --font-display:   'Glacial Indifference', 'Century Gothic', 'Futura', 'Avenir Next', system-ui, sans-serif;
    --font-editorial: 'Glacial Indifference', 'Century Gothic', 'Futura', 'Avenir Next', system-ui, sans-serif;

    --space-xs:       0.5rem;
    --space-s:        1rem;
    --space-m:        1.75rem;
    --space-l:        2.5rem;
    --space-xl:       4rem;
    --space-2xl:      6rem;
    --space-3xl:      9rem;

    --measure:        70ch;
    --container:      1320px;
    --container-narrow: 760px;

    --ease:           cubic-bezier(0.2, 0.7, 0.2, 1);
    --fast:           160ms var(--ease);
    --normal:         260ms var(--ease);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-editorial);
    font-variation-settings: 'opsz' 16, 'SOFT' 30, 'WONK' 0;
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--ink);
    background: var(--linen);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

/* ---------- MASTHEAD STRIPE ---------- */
.stripe {
    background: var(--charcoal);
    color: var(--paper);
    font-family: var(--font-display);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    padding: 0.625rem var(--space-l);
}
.stripe__inner {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-m);
    flex-wrap: wrap;
}
.stripe__vol { color: var(--zima); }
.stripe__date { color: var(--platinum); }
.stripe__tag {
    color: var(--paper);
    font-style: italic;
    font-family: var(--font-editorial);
    font-variation-settings: 'opsz' 14, 'SOFT' 50;
    text-transform: none;
    letter-spacing: 0.02em;
    font-size: 0.8125rem;
}

/* ---------- NAV ---------- */
.nav {
    position: sticky;
    top: 0;
    background: rgba(242, 240, 234, 0.95);
    backdrop-filter: saturate(160%) blur(10px);
    -webkit-backdrop-filter: saturate(160%) blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--concrete);
}
.nav__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-l);
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-l);
}
.nav__logo {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--charcoal);
    text-decoration: none;
}
.nav__menu { display: flex; gap: 2rem; list-style: none; }
.nav__menu a {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink);
    text-decoration: none;
    transition: color var(--fast);
}
.nav__menu a:hover,
.nav__menu a[aria-current="page"] { color: var(--zima); }

/* ---------- PAGE HEADER ---------- */
.page-head {
    background: var(--charcoal);
    color: var(--paper);
    padding: var(--space-3xl) var(--space-l) var(--space-2xl);
}
.page-head__inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
}
.page-head__kicker {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--zima);
    margin-bottom: var(--space-m);
}
.page-head__rule {
    width: 56px;
    height: 1px;
    background: var(--zima);
    margin-bottom: var(--space-l);
}
.page-head h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1;
    letter-spacing: -0.01em;
    text-transform: uppercase;
    margin-bottom: var(--space-m);
}
.page-head__meta {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--stone);
}
.page-head__meta strong { color: var(--platinum); font-weight: 600; }

/* ---------- PLAIN-LANGUAGE SUMMARY ---------- */
.summary {
    background: var(--paper);
    border-bottom: 1px solid var(--concrete);
    padding: var(--space-2xl) var(--space-l);
}
.summary__inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
}
.summary__label {
    font-family: var(--font-display);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--zima);
    margin-bottom: var(--space-s);
}
.summary p {
    font-variation-settings: 'opsz' 24, 'SOFT' 40, 'wght' 400;
    font-style: italic;
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--charcoal);
    max-width: var(--measure);
}

/* ---------- PROSE BODY ---------- */
.policy {
    padding: var(--space-2xl) var(--space-l) var(--space-3xl);
}
.policy__inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
}
.policy section { margin-bottom: var(--space-2xl); scroll-margin-top: 96px; }
.policy h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.1;
    letter-spacing: -0.005em;
    text-transform: uppercase;
    color: var(--charcoal);
    margin-bottom: var(--space-m);
    padding-bottom: var(--space-s);
    border-bottom: 1px solid var(--concrete);
}
.policy h2 .num {
    font-family: var(--font-editorial);
    font-variation-settings: 'opsz' 144, 'wght' 300;
    font-style: normal;
    color: var(--zima);
    margin-right: 0.6rem;
}
.policy h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.1875rem;
    letter-spacing: 0.01em;
    color: var(--ink);
    margin: var(--space-l) 0 var(--space-xs);
}
.policy p { margin-bottom: var(--space-m); max-width: var(--measure); }
.policy a { color: var(--zima); text-decoration: underline; text-underline-offset: 2px; }
.policy a:hover { color: var(--ink); }
.policy ul, .policy ol { margin: 0 0 var(--space-m) 1.25rem; max-width: var(--measure); }
.policy li { margin-bottom: var(--space-xs); padding-left: 0.25rem; }
.policy strong { font-weight: 600; }

/* contact / regulator block */
.contact-block {
    background: var(--paper);
    border-left: 2px solid var(--zima);
    padding: var(--space-l);
    margin-bottom: var(--space-m);
}
.contact-block p { margin-bottom: var(--space-xs); max-width: none; }
.contact-block .label {
    font-family: var(--font-display);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--slate);
    margin-bottom: var(--space-s);
}

/* draft / review notice */
.notice {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-xl);
    background: rgba(91, 194, 231, 0.10);
    border: 1px solid var(--zima);
    padding: var(--space-m) var(--space-l);
    font-family: var(--font-display);
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    line-height: 1.6;
    color: var(--slate);
}
.notice strong { color: var(--zima); }

/* ---------- FOOTER ---------- */
footer {
    background: var(--charcoal);
    color: var(--platinum);
    padding: var(--space-2xl) var(--space-l) var(--space-l);
}
.footer__inner {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-l);
    flex-wrap: wrap;
    padding-bottom: var(--space-l);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--paper);
}
.footer__nav { display: flex; gap: var(--space-l); flex-wrap: wrap; list-style: none; }
.footer__nav a {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--platinum);
    text-decoration: none;
    transition: color var(--fast);
    background: none;
    border: 0;
    cursor: pointer;
    padding: 0;
}
.footer__nav a:hover { color: var(--zima); }
.footer__bottom {
    max-width: var(--container);
    margin: 0 auto;
    padding-top: var(--space-l);
    display: flex;
    justify-content: space-between;
    gap: var(--space-l);
    flex-wrap: wrap;
    font-family: var(--font-display);
    font-size: 0.6875rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--stone);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
    .stripe { font-size: 0.625rem; padding: 0.5rem var(--space-m); }
    .nav__menu { display: none; }
    .nav__inner { padding: 0 var(--space-m); height: 64px; }
    .page-head { padding: var(--space-2xl) var(--space-m) var(--space-xl); }
    .summary, .policy { padding-left: var(--space-m); padding-right: var(--space-m); }
    footer { padding-left: var(--space-m); padding-right: var(--space-m); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: 0.01ms !important; }
}

a:focus-visible, button:focus-visible {
    outline: 2px solid var(--zima);
    outline-offset: 3px;
}