/* ============================================================
   AutonoIQ v2 — "Quiet Machinery" core design system
   Paper & ink editorial system with a single ember accent.
   Pages add their own styles in styles/v2/<page>.css.
   ============================================================ */

/* ----- Tokens ----- */
:root {
    --paper: #F6F3ED;
    --paper-deep: #ECE7DD;
    --ink: #131210;
    --ink-soft: #1C1B18;
    --ink-border: rgba(19, 18, 16, 0.14);
    --ink-border-strong: rgba(19, 18, 16, 0.32);
    --cream: #EDE9E1;
    --cream-border: rgba(237, 233, 225, 0.16);
    --muted: #6F6A60;
    --muted-dark: #A39E94;
    --ember: #E8490F;
    --ember-bright: #FF5A1F;
    --ember-soft: rgba(232, 73, 15, 0.08);

    --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
    --font-body: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Spline Sans Mono', 'SF Mono', Menlo, monospace;

    --text-display: clamp(3rem, 7vw, 5.75rem);
    --text-h1: clamp(2.5rem, 5vw, 4rem);
    --text-h2: clamp(1.9rem, 3.5vw, 2.75rem);
    --text-h3: 1.375rem;
    --text-body: 1.0625rem;
    --text-small: 0.9375rem;
    --text-label: 0.8125rem;

    --radius: 4px;
    --container: 1280px;
    --gutter: clamp(1.25rem, 4vw, 2.5rem);
    --section-pad: clamp(4.5rem, 9vw, 8.5rem);

    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --speed: 0.55s;

    /* Legacy aliases — required by blog-loader.js injected markup ONLY */
    --primary-orange: #E8490F;
    --secondary-orange: #FF5A1F;
    --accent-orange: #E8490F;
    --primary-black: #131210;
    --primary-white: #F6F3ED;
    --text-gray: #6F6A60;
}

/* ----- Reset & base ----- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    line-height: 1.7;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img, svg, video, canvas { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul[class], ol[class] { list-style: none; }
::selection { background: var(--ember); color: var(--paper); }

h1, h2, h3, .display {
    font-family: var(--font-display);
    font-weight: 420;
    line-height: 1.06;
    letter-spacing: -0.025em;
    font-variation-settings: 'opsz' 100;
    text-wrap: balance;
}
h2 { font-size: var(--text-h2); }
h1 em, h2 em, h3 em, .display em {
    font-style: italic;
    font-weight: 380;
    color: var(--ember);
}
.section--dark h1 em, .section--dark h2 em, .section--dark h3 em { color: var(--ember-bright); }

:focus-visible {
    outline: 2px solid var(--ember);
    outline-offset: 3px;
    border-radius: 2px;
}
.skip-link {
    position: absolute; left: -9999px; top: 0; z-index: 2000;
    background: var(--ink); color: var(--cream);
    padding: 0.75rem 1.25rem; font-family: var(--font-mono); font-size: var(--text-label);
}
.skip-link:focus { left: 0; }

/* ----- Layout ----- */
.container { max-width: var(--container); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-pad); position: relative; }
.section--deep {
    background: var(--paper-deep);
    /* Darken muted so body text stays >= 4.5:1 (AA) on the deeper paper */
    --muted: #686358;
}
.section--dark { background: var(--ink); color: var(--cream); }
.section--dark .label { color: var(--muted-dark); }
.section--dark .label__index { color: var(--ember-bright); }

.eyebrow-rule {
    display: flex; align-items: center; gap: 1.25rem;
    padding-bottom: 1.5rem; margin-bottom: clamp(2rem, 5vw, 3.5rem);
    border-bottom: 1px solid var(--ink-border);
}
.section--dark .eyebrow-rule { border-color: var(--cream-border); }

/* ----- Labels ----- */
.label {
    font-family: var(--font-mono);
    font-size: var(--text-label);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
}
.label__index { color: var(--ember); margin-right: 0.5rem; }

/* ----- Buttons ----- */
.btn {
    display: inline-flex; align-items: center; gap: 0.625rem;
    font-family: var(--font-body); font-weight: 600; font-size: 0.9375rem;
    letter-spacing: 0.01em; text-decoration: none; white-space: nowrap;
    padding: 0.95rem 1.75rem; border-radius: var(--radius);
    border: 1px solid transparent;
    transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out),
                border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
    will-change: transform;
}
.btn__arrow { display: inline-block; transition: transform 0.3s var(--ease-out); }
.btn:hover .btn__arrow { transform: translateX(5px); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--ember); color: #fff; }
.btn--ember { background: var(--ember); color: #fff; }
.btn--ember:hover { background: var(--ember-bright); }
.btn--ghost { border-color: var(--ink-border-strong); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.section--dark .btn--ghost { border-color: var(--cream-border); color: var(--cream); }
.section--dark .btn--ghost:hover { background: var(--cream); color: var(--ink); border-color: var(--cream); }
.btn--sm { padding: 0.65rem 1.25rem; font-size: 0.875rem; }
.btn--lg { padding: 1.15rem 2.4rem; font-size: 1.0625rem; }

/* ----- Cards ----- */
.card {
    background: var(--paper-deep);
    border: 1px solid var(--ink-border);
    border-radius: var(--radius);
    padding: clamp(1.5rem, 3vw, 2.25rem);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out),
                border-color 0.4s var(--ease-out);
}
.card:hover {
    transform: translateY(-6px);
    border-color: var(--ink-border-strong);
    box-shadow: 0 24px 48px -24px rgba(19, 18, 16, 0.28);
}
.section--dark .card { background: var(--ink-soft); border-color: var(--cream-border); }
.section--dark .card:hover { box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.6); }

/* ----- Stats ----- */
.stat { display: flex; flex-direction: column; gap: 0.4rem; }
.stat__num {
    font-family: var(--font-mono); font-weight: 500;
    font-size: clamp(2.25rem, 4.5vw, 3.5rem); line-height: 1;
    letter-spacing: -0.03em; color: var(--ink); font-variant-numeric: tabular-nums;
}
.section--dark .stat__num { color: var(--cream); }
.stat__num sup, .stat__suffix { color: var(--ember); font-size: 0.6em; }
.stat__caption { font-family: var(--font-display); font-style: italic; color: var(--muted); font-size: 1.05rem; }
.section--dark .stat__caption { color: var(--muted-dark); }

/* ----- Marquee ----- */
.marquee { overflow: hidden; border-block: 1px solid var(--ink-border); padding-block: 1.1rem; }
.section--dark .marquee { border-color: var(--cream-border); }
.marquee__track {
    display: flex; gap: 3.5rem; width: max-content;
    animation: marquee-scroll 36s linear infinite;
    font-family: var(--font-mono); font-size: var(--text-label);
    text-transform: uppercase; letter-spacing: 0.16em; color: var(--muted);
}
.marquee__track > * { display: inline-flex; align-items: center; gap: 3.5rem; white-space: nowrap; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee-scroll { to { transform: translateX(-50%); } }

/* ----- Accordion ----- */
.accordion__item { border-bottom: 1px solid var(--ink-border); }
.accordion__trigger {
    width: 100%; display: flex; justify-content: space-between; align-items: center;
    gap: 1.5rem; padding: 1.5rem 0; text-align: left;
    font-family: var(--font-display); font-size: 1.2rem; font-weight: 460;
}
.accordion__icon {
    font-family: var(--font-mono); color: var(--ember); flex-shrink: 0;
    transition: transform 0.35s var(--ease-out);
}
.accordion__item.is-open .accordion__icon { transform: rotate(45deg); }
.accordion__panel {
    overflow: hidden; max-height: 0;
    transition: max-height 0.45s var(--ease-out);
}
.accordion__panel-inner { padding: 0 0 1.75rem; color: var(--muted); max-width: 62ch; }

/* ----- Header ----- */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(246, 243, 237, 0.86);
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--ink-border); }
.site-header__inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 2rem; height: 76px;
}
.wordmark {
    font-family: var(--font-display); font-size: 1.5rem; font-weight: 540;
    letter-spacing: -0.02em; text-decoration: none; color: var(--ink); line-height: 1;
}
.wordmark em { font-style: italic; font-weight: 420; color: var(--ember); }
.wordmark__dot { color: var(--ember); }
.site-nav__list { display: flex; gap: 2.25rem; }
.site-nav__link {
    font-size: 0.9375rem; font-weight: 500; text-decoration: none;
    color: var(--ink); opacity: 0.72; position: relative; padding-block: 0.25rem;
    transition: opacity 0.25s ease;
}
.site-nav__link::after {
    content: ''; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
    background: var(--ember); transition: width 0.3s var(--ease-out);
}
.site-nav__link:hover, .site-nav__link[aria-current="page"] { opacity: 1; }
.site-nav__link:hover::after, .site-nav__link[aria-current="page"]::after { width: 100%; }
.site-header__actions { display: flex; align-items: center; gap: 1rem; }

.nav-toggle {
    display: none; flex-direction: column; justify-content: center; gap: 7px;
    width: 44px; height: 44px; align-items: center; z-index: 1101;
}
.nav-toggle span {
    width: 26px; height: 2px; background: var(--ink); display: block;
    transition: transform 0.35s var(--ease-out), opacity 0.3s, background-color 0.3s;
}
.nav-toggle.is-open span:first-child { transform: translateY(4.5px) rotate(45deg); background: var(--cream); }
.nav-toggle.is-open span:last-child { transform: translateY(-4.5px) rotate(-45deg); background: var(--cream); }

/* ----- Mobile menu ----- */
.mobile-menu {
    position: fixed; inset: 0; z-index: 1100; background: var(--ink);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: opacity 0.4s var(--ease-out), visibility 0.4s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu__list { display: flex; flex-direction: column; gap: 0.5rem; text-align: center; }
.mobile-menu__list a {
    font-family: var(--font-display); font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 420; color: var(--cream); text-decoration: none; line-height: 1.4;
    display: inline-block; opacity: 0; transform: translateY(24px);
    transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out), color 0.3s;
}
.mobile-menu__list a:hover { color: var(--ember-bright); }
.mobile-menu.is-open .mobile-menu__list a { opacity: 1; transform: none; }
.mobile-menu__list li:nth-child(1) a { transition-delay: 0.08s; }
.mobile-menu__list li:nth-child(2) a { transition-delay: 0.14s; }
.mobile-menu__list li:nth-child(3) a { transition-delay: 0.2s; }
.mobile-menu__list li:nth-child(4) a { transition-delay: 0.26s; }
.mobile-menu__list li:nth-child(5) a { transition-delay: 0.32s; }
.mobile-menu__list li:nth-child(6) a { transition-delay: 0.38s; }
.mobile-menu__cta { margin-top: 2.5rem; opacity: 0; transition-delay: 0.45s; }
.mobile-menu.is-open .mobile-menu__cta { opacity: 1; transition: opacity 0.5s var(--ease-out) 0.45s; }
body.menu-open { overflow: hidden; }
/* Lift the header above the menu overlay so the logo + close toggle stay
   visible and clickable (.nav-toggle's z-index is trapped in the header's
   stacking context, which otherwise sits below .mobile-menu). */
body.menu-open .site-header {
    z-index: 1200;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom-color: transparent;
}
body.menu-open .wordmark { color: var(--cream); }
body.menu-open .wordmark em,
body.menu-open .wordmark__dot { color: var(--ember-bright); }

/* ----- Footer ----- */
.site-footer { padding-top: var(--section-pad); overflow: hidden; }
.site-footer__cta { text-align: center; padding-bottom: clamp(3.5rem, 7vw, 6rem); }
.site-footer__headline {
    font-size: var(--text-h1); margin: 1.25rem auto 2.5rem; max-width: 18ch;
}
.site-footer__grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
    padding-block: 3rem; border-top: 1px solid var(--cream-border);
}
.site-footer__heading {
    font-family: var(--font-mono); font-size: var(--text-label);
    text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted-dark);
    margin-bottom: 1.1rem;
}
.site-footer__col ul { display: flex; flex-direction: column; gap: 0.65rem; list-style: none; margin: 0; padding: 0; }
.site-footer__col a {
    text-decoration: none; color: var(--cream); opacity: 0.78; font-size: var(--text-small);
    transition: opacity 0.25s, color 0.25s;
}
.site-footer__col a:hover { opacity: 1; color: var(--ember-bright); }
.site-footer__wordmark {
    font-family: var(--font-display); font-weight: 460; line-height: 0.95;
    font-size: clamp(4.5rem, 16vw, 14rem); letter-spacing: -0.04em;
    text-align: center; color: var(--cream); opacity: 0.1; user-select: none;
    margin-top: 1.5rem; white-space: nowrap;
}
.site-footer__wordmark em { font-style: italic; }
.site-footer__legal {
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
    flex-wrap: wrap; padding-block: 1.75rem; border-top: 1px solid var(--cream-border);
    color: var(--muted-dark); font-size: 0.875rem;
}
.site-footer__mono { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.14em; }

/* ----- Grain ----- */
.grain::after {
    content: ''; position: absolute; inset: 0; pointer-events: none; opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}
.grain { position: relative; }
.grain > * { position: relative; z-index: 1; }

/* ----- Reveal (site.js) ----- */
[data-reveal] {
    opacity: 0; transform: translateY(28px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
    transition-delay: var(--reveal-delay, 0s);
}
[data-reveal].is-revealed { opacity: 1; transform: none; }

/* ----- Custom cursor ----- */
.cursor-dot {
    position: fixed; top: 0; left: 0; width: 8px; height: 8px;
    background: var(--ember); border-radius: 50%; pointer-events: none;
    z-index: 3000; transform: translate(-50%, -50%);
    transition: width 0.25s, height 0.25s, opacity 0.3s;
    opacity: 0;
}
.cursor-dot.is-active { opacity: 1; }
.cursor-dot.is-hovering { width: 40px; height: 40px; background: transparent; border: 1px solid var(--ember); }
@media (max-width: 991px), (pointer: coarse) { .cursor-dot { display: none; } }

/* ----- Utilities ----- */
.text-center { text-align: center; }
.measure { max-width: 62ch; }
.muted { color: var(--muted); }
.section--dark .muted { color: var(--muted-dark); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1.5rem, 3vw, 2.5rem); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 2.5rem); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.25rem, 2.5vw, 2rem); }

/* ----- Responsive ----- */
@media (max-width: 991px) {
    .site-nav { display: none; }
    .nav-toggle { display: flex; }
    .site-header__actions .btn { display: none; }
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .site-footer__grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .site-footer__legal { flex-direction: column; align-items: flex-start; }
}

/* ----- Reduced motion ----- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
    [data-reveal] { opacity: 1; transform: none; }
    .marquee__track { animation: none; }
}