/* ===================================================================
   ColdEnergy — main stylesheet
   Tokens → base → layout → components → utilities → responsive → motion
   =================================================================== */

/* ---------- Tokens ---------- */
:root {
    /* Palette */
    --bg-0: #0A0D12;
    --bg-1: #10151C;
    --bg-2: #161C25;
    --bg-3: #1D2632;
    --border: #23303C;
    --border-strong: #2F3E4D;

    --text: #E6EEF7;
    --text-muted: #8A99AB;
    --text-dim: #5C6B7E;

    --accent: #22D3EE;
    --accent-2: #3B82F6;
    --accent-glow: rgba(34, 211, 238, .35);
    --accent-soft: rgba(34, 211, 238, .12);

    --danger: #F87171;
    --success: #34D399;

    /* Spacing scale */
    --s-1: 4px;   --s-2: 8px;   --s-3: 12px;  --s-4: 16px;
    --s-5: 24px;  --s-6: 32px;  --s-7: 48px;  --s-8: 64px;
    --s-9: 96px;  --s-10: 128px;

    /* Radius */
    --r-1: 4px; --r-2: 8px; --r-3: 12px; --r-4: 16px; --r-full: 999px;

    /* Shadows */
    --shadow-1: 0 1px 2px rgba(0,0,0,.4);
    --shadow-2: 0 8px 24px rgba(0,0,0,.35);
    --shadow-3: 0 20px 60px rgba(0,0,0,.45);
    --shadow-glow: 0 0 0 1px var(--accent-soft), 0 12px 40px var(--accent-glow);

    /* Typography */
    --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;

    /* Layout */
    --container: 1280px;
    --gutter: clamp(1rem, 4vw, 2rem);
    --header-h: 72px;

    /* Motion */
    --ease-out: cubic-bezier(.16, 1, .3, 1);
    --ease-in-out: cubic-bezier(.65, 0, .35, 1);
    --dur-fast: 150ms;
    --dur: 250ms;
    --dur-slow: 450ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 16px);
    -webkit-text-size-adjust: 100%;
}
body {
    background: var(--bg-0);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: clamp(15px, 0.6vw + 13px, 17px);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
a { color: inherit; text-decoration: none; transition: color var(--dur-fast) var(--ease-out); }
a:hover { color: var(--accent); }
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--r-1);
}
ul { padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: 1.15;
    letter-spacing: -0.02em;
    font-weight: 600;
}

/* ---------- Typography utility classes ---------- */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--s-4);
}
.eyebrow::before {
    content: "";
    width: 24px;
    height: 1px;
    background: var(--accent);
}
.accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}
main { min-height: 60vh; }

/* ---------- Skip link ---------- */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    padding: var(--s-3) var(--s-4);
    background: var(--accent);
    color: var(--bg-0);
    font-weight: 600;
    z-index: 1000;
}
.skip-link:focus { left: var(--s-4); top: var(--s-4); }

/* ==================== HEADER ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(10, 13, 18, .6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.site-header[data-scrolled="true"] {
    background: rgba(10, 13, 18, .85);
    border-bottom-color: var(--border);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--s-4);
}
.site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: var(--s-3);
    color: var(--text);
    font-family: var(--font-display);
}
.site-header__brand:hover { color: var(--text); }
.site-header__logo {
    height: 36px;
    width: auto;
    display: block;
}
.site-footer__logo {
    height: 32px;
    width: auto;
    display: block;
    margin-bottom: var(--s-3);
}
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 40px; height: 40px;
    border-radius: var(--r-2);
    background: linear-gradient(135deg, rgba(34,211,238,.15), rgba(59,130,246,.10));
    border: 1px solid var(--border);
    color: var(--accent);
    transition: transform var(--dur) var(--ease-out);
}
.site-header__brand:hover .brand-mark { transform: rotate(45deg); }
.brand-text { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.02em; font-size: 18px; }
.brand-text__main { color: var(--text); }
.brand-text__accent { color: var(--accent); }

.site-nav ul {
    display: flex;
    align-items: center;
    gap: var(--s-5);
}
.site-nav a:not(.btn) {
    position: relative;
    font-weight: 500;
    color: var(--text-muted);
    padding: var(--s-2) 0;
    font-size: 15px;
}
.site-nav a:not(.btn)::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -4px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur) var(--ease-out);
}
.site-nav a:not(.btn):hover,
.site-nav a:not(.btn).is-active { color: var(--text); }
.site-nav a:not(.btn).is-active::after,
.site-nav a:not(.btn):hover::after { transform: scaleX(1); }

.nav-toggle {
    display: none;
    width: 44px; height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    border-radius: var(--r-2);
}
.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==================== BUTTONS ==================== */
.btn {
    --btn-bg: var(--bg-2);
    --btn-fg: var(--text);
    --btn-border: var(--border);

    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    padding: 14px 24px;
    min-height: 48px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.01em;
    border-radius: var(--r-2);
    background: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    transition: transform var(--dur-fast) var(--ease-out),
                background var(--dur) var(--ease-out),
                border-color var(--dur) var(--ease-out),
                box-shadow var(--dur) var(--ease-out);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}
.btn:hover { color: var(--btn-fg); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn--sm { min-height: 40px; padding: 8px 18px; font-size: 14px; }
.btn--block { width: 100%; }

.btn--accent {
    --btn-bg: var(--accent);
    --btn-fg: var(--bg-0);
    --btn-border: var(--accent);
    box-shadow: 0 8px 24px -8px var(--accent-glow);
}
.btn--accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 40px -8px var(--accent-glow);
}
.btn--accent::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.35) 50%, transparent 70%);
    transform: translateX(-120%);
    transition: transform 700ms var(--ease-out);
    pointer-events: none;
}
.btn--accent:hover::after { transform: translateX(120%); }

.btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--text);
    --btn-border: var(--border-strong);
}
.btn--ghost:hover {
    --btn-bg: var(--bg-2);
    --btn-border: var(--accent);
}

/* ==================== HERO ==================== */
.hero {
    position: relative;
    padding-block: clamp(var(--s-8), 12vw, var(--s-10));
    overflow: hidden;
    isolation: isolate;
}
.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(80% 60% at 50% 0%, rgba(59, 130, 246, .15), transparent 70%),
        radial-gradient(60% 40% at 90% 60%, rgba(34, 211, 238, .12), transparent 70%),
        linear-gradient(180deg, var(--bg-0), var(--bg-1));
}
.hero__bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(34, 211, 238, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 211, 238, .04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent 80%);
}
.hero__bg::after {
    content: "";
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg, transparent 0deg, rgba(34, 211, 238, .06) 90deg, transparent 180deg, rgba(59, 130, 246, .05) 270deg, transparent 360deg);
    animation: rotate 24s linear infinite;
    filter: blur(60px);
    z-index: -1;
}
@keyframes rotate { to { transform: rotate(360deg); } }

.hero__inner { max-width: 900px; }
.hero__title {
    font-size: clamp(2.25rem, 5.5vw, 4.25rem);
    font-weight: 700;
    line-height: 1.05;
    margin-bottom: var(--s-5);
    letter-spacing: -0.03em;
}
.hero__lead {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    color: var(--text-muted);
    max-width: 640px;
    margin-bottom: var(--s-6);
}
.hero__cta {
    display: flex;
    gap: var(--s-3);
    flex-wrap: wrap;
    margin-bottom: var(--s-8);
}
.hero__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--s-5);
    padding-top: var(--s-6);
    border-top: 1px solid var(--border);
    max-width: 720px;
}
.hero__stats li {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
}
.hero__stats strong {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}
.hero__stats span {
    color: var(--text-muted);
    font-size: 14px;
}

/* ==================== SECTIONS ==================== */
.section {
    padding-block: clamp(var(--s-7), 8vw, var(--s-9));
    position: relative;
}
.section--alt { background: var(--bg-1); }
.section--dark { background: var(--bg-0); }

.section__header {
    max-width: 720px;
    margin-bottom: var(--s-7);
}
.section__title {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    margin-bottom: var(--s-4);
}
.section__lead {
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    color: var(--text-muted);
}

/* ==================== GRIDS ==================== */
.grid { display: grid; gap: var(--s-5); }
.grid--services { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--projects { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid--testimonials { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--founders { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: var(--s-6); }
.grid--process { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* ==================== CARDS ==================== */
.card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    padding: var(--s-6);
    transition: transform var(--dur) var(--ease-out),
                border-color var(--dur) var(--ease-out),
                box-shadow var(--dur) var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
    contain: layout style;
}
.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow-2), 0 0 40px -20px var(--accent-glow);
}
.card__icon {
    display: inline-grid;
    place-items: center;
    width: 56px; height: 56px;
    border-radius: var(--r-2);
    background: var(--accent-soft);
    color: var(--accent);
    margin-bottom: var(--s-2);
    transition: transform var(--dur) var(--ease-out);
}
.card:hover .card__icon { transform: scale(1.08) rotate(-5deg); }
.card h3 {
    font-size: 1.25rem;
    color: var(--text);
}
.card p { color: var(--text-muted); font-size: 15px; }
.card__list {
    display: flex;
    flex-direction: column;
    gap: var(--s-2);
    margin-top: auto;
    padding-top: var(--s-3);
    border-top: 1px solid var(--border);
}
.card__list li {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    font-size: 14px;
    color: var(--text-muted);
}
.card__list li::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ==================== PROJECTS ==================== */
.project {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    overflow: hidden;
    transition: transform var(--dur) var(--ease-out),
                border-color var(--dur) var(--ease-out),
                box-shadow var(--dur) var(--ease-out);
    display: flex;
    flex-direction: column;
}
.project:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-2);
}
.project__media {
    aspect-ratio: 16 / 10;
    background: var(--bg-3);
    position: relative;
    overflow: hidden;
}
.project__media img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--dur-slow) var(--ease-out);
}
.project:hover .project__media img { transform: scale(1.04); }
.project__body { padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3); }
.project__body h3 { font-size: 1.15rem; }
.project__body p { font-size: 15px; color: var(--text-muted); }

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: var(--r-full);
    align-self: flex-start;
}

/* ==================== PLACEHOLDER MEDIA ==================== */
.placeholder,
[data-placeholder] {
    position: relative;
    background:
        repeating-linear-gradient(45deg,
            rgba(255,255,255,.02) 0 10px,
            rgba(255,255,255,.04) 10px 20px),
        var(--bg-3);
    display: grid;
    place-items: center;
    color: var(--text-dim);
    font-size: 13px;
    text-align: center;
    padding: var(--s-4);
    min-height: 100%;
}
[data-placeholder]::after {
    content: attr(data-placeholder);
    display: block;
    font-family: var(--font-display);
    letter-spacing: 0.05em;
}
[data-placeholder]::before {
    content: "";
    position: absolute;
    inset: 12px;
    border: 1px dashed var(--border-strong);
    border-radius: var(--r-2);
    pointer-events: none;
}

/* ==================== FOUNDERS ==================== */
.founder {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: var(--s-5);
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    overflow: hidden;
    transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.founder:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}
.founder__photo {
    aspect-ratio: 4 / 5;
    background: var(--bg-3);
}
.founder__body { padding: var(--s-5) var(--s-5) var(--s-5) 0; display: flex; flex-direction: column; gap: var(--s-3); justify-content: center; }
.founder__body h3 { font-size: 1.35rem; }
.founder__role { color: var(--accent); font-family: var(--font-display); font-weight: 600; font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; }
.founder__body p { color: var(--text-muted); font-size: 15px; }

/* ==================== TESTIMONIALS ==================== */
.testimonial {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    padding: var(--s-5);
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
    position: relative;
    transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.testimonial:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}
.testimonial::before {
    content: "\201C";
    position: absolute;
    top: -8px; left: var(--s-4);
    font-family: var(--font-display);
    font-size: 96px;
    line-height: 1;
    color: var(--accent);
    opacity: 0.2;
    font-weight: 700;
}
.testimonial blockquote { color: var(--text); font-size: 16px; line-height: 1.6; }
.testimonial figcaption { color: var(--text-muted); font-size: 14px; }

/* ==================== PROCESS ==================== */
.process-step {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    padding: var(--s-5);
    position: relative;
    transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.process-step:hover { transform: translateY(-4px); border-color: var(--accent); }
.process-step__num {
    display: inline-grid;
    place-items: center;
    width: 40px; height: 40px;
    border-radius: var(--r-2);
    background: var(--accent);
    color: var(--bg-0);
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--s-3);
}
.process-step h3 { font-size: 1.1rem; margin-bottom: var(--s-2); }
.process-step p { color: var(--text-muted); font-size: 14px; }

/* ==================== CTA BANNER ==================== */
.cta-banner {
    padding-block: clamp(var(--s-7), 8vw, var(--s-8));
    background:
        radial-gradient(50% 100% at 100% 50%, rgba(34,211,238,.10), transparent 60%),
        var(--bg-1);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.cta-banner__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--s-6);
}
.cta-banner h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); margin-bottom: var(--s-3); }
.cta-banner p { color: var(--text-muted); max-width: 560px; }
.cta-banner__actions { display: flex; gap: var(--s-3); flex-wrap: wrap; }

/* ==================== CONTACT ==================== */
.contact {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: var(--s-6);
    align-items: start;
}
.contact__info {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    padding: var(--s-6);
    position: sticky;
    top: calc(var(--header-h) + var(--s-4));
}
.contact__info h3 { font-size: 1.1rem; margin-bottom: var(--s-5); }
.contact__list { display: flex; flex-direction: column; gap: var(--s-4); margin-bottom: var(--s-5); }
.contact__list li {
    display: flex;
    flex-direction: column;
    gap: var(--s-1);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--border);
}
.contact__list li:last-child { border-bottom: 0; }
.contact__label {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}
.contact__value { color: var(--text); font-size: 16px; font-weight: 500; }
a.contact__value:hover { color: var(--accent); }

/* ==================== FORM ==================== */
.contact__form {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-3);
    padding: var(--s-6);
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
}
.form-row { display: flex; flex-direction: column; gap: var(--s-2); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); }
.form-row label {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-1);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--r-2);
    font-size: 15px;
    font-family: inherit;
    transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.form-row select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%), linear-gradient(135deg, var(--text-muted) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%; background-size: 6px 6px; background-repeat: no-repeat; padding-right: 40px; }
.form-row textarea { resize: vertical; min-height: 120px; }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row input[aria-invalid="true"],
.form-row textarea[aria-invalid="true"] {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(248, 113, 113, .12);
}
.form-row--check {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--s-3);
}
.form-row--check input { width: 20px; height: 20px; accent-color: var(--accent); margin-top: 3px; flex-shrink: 0; }
.form-row--check label {
    font-family: var(--font-body);
    text-transform: none;
    letter-spacing: normal;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
    line-height: 1.5;
}

.hp {
    position: absolute;
    left: -9999px;
    width: 1px; height: 1px;
    overflow: hidden;
}

.form-status { font-size: 14px; min-height: 20px; }
.form-status[data-status="ok"] { color: var(--success); }
.form-status[data-status="err"] { color: var(--danger); }

.btn[data-loading="true"] { pointer-events: none; opacity: 0.7; }
.btn[data-loading="true"]::before {
    content: "";
    width: 16px; height: 16px;
    border: 2px solid rgba(0,0,0,.3);
    border-top-color: var(--bg-0);
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==================== CLIENT LOGOS ==================== */
.logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--s-3);
    margin-top: var(--s-6);
}
.logo-tile {
    aspect-ratio: 3 / 2;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-2);
    display: grid;
    place-items: center;
    color: var(--text-dim);
    font-family: var(--font-display);
    font-size: 13px;
    letter-spacing: 0.05em;
    transition: border-color var(--dur) var(--ease-out);
}
.logo-tile:hover { border-color: var(--accent); }

/* ==================== FOOTER ==================== */
.site-footer {
    background: var(--bg-1);
    border-top: 1px solid var(--border);
    padding-top: var(--s-8);
    margin-top: var(--s-8);
}
.site-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--s-6);
    padding-bottom: var(--s-6);
}
.site-footer__col p { color: var(--text-muted); font-size: 14px; margin-top: var(--s-3); max-width: 320px; }
.site-footer__col h4 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--s-4);
    font-weight: 600;
}
.site-footer__col ul { display: flex; flex-direction: column; gap: var(--s-2); }
.site-footer__col a { color: var(--text); font-size: 14px; }
.site-footer__col li { color: var(--text-muted); font-size: 14px; }

.site-footer__bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-4);
    padding: var(--s-4) var(--gutter);
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    flex-wrap: wrap;
}
.site-footer__bar small { font-size: 13px; }
.site-footer__bar a { color: var(--text-muted); }

/* ==================== 404 ==================== */
.error-page {
    min-height: calc(100vh - var(--header-h) - 200px);
    display: grid;
    place-items: center;
    padding-block: var(--s-8);
    text-align: center;
}
.error-page__code {
    font-family: var(--font-display);
    font-size: clamp(6rem, 20vw, 12rem);
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: var(--s-4);
}

/* ==================== FEATURED (index page) ==================== */
.split-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--s-6);
    align-items: center;
}
.split-2__media { aspect-ratio: 4/3; border-radius: var(--r-3); overflow: hidden; border: 1px solid var(--border); }

/* ==================== REVEAL ANIMATIONS ==================== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
    will-change: opacity, transform;
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 900px) {
    .contact { grid-template-columns: 1fr; }
    .contact__info { position: static; }
    .founder { grid-template-columns: 1fr; }
    .founder__photo { aspect-ratio: 16/10; }
    .founder__body { padding: 0 var(--s-5) var(--s-5); }
    .split-2 { grid-template-columns: 1fr; }
    .cta-banner__inner { grid-template-columns: 1fr; }
    .site-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --header-h: 64px; }

    .nav-toggle { display: flex; }
    .site-nav {
        position: fixed;
        inset: var(--header-h) 0 0 0;
        background: rgba(10, 13, 18, .98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: var(--s-6) var(--gutter);
        transform: translateX(100%);
        transition: transform var(--dur) var(--ease-out);
        overflow-y: auto;
    }
    .site-nav.is-open { transform: translateX(0); }
    .site-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: var(--s-2);
    }
    .site-nav a:not(.btn) {
        display: block;
        padding: var(--s-4);
        font-size: 18px;
        color: var(--text);
        border-bottom: 1px solid var(--border);
    }
    .site-nav a:not(.btn)::after { display: none; }
    .site-nav .btn { margin-top: var(--s-3); justify-content: center; }

    .form-grid { grid-template-columns: 1fr; }
    .site-footer__inner { grid-template-columns: 1fr; }
    .site-footer__bar { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .btn { width: 100%; }
    .hero__cta .btn { flex: 1; }
    .cta-banner__actions { flex-direction: column; align-items: stretch; }
}

/* ==================== MOTION PREFERENCES ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal,
    .reveal-stagger > * { opacity: 1; transform: none; }
    .hero__bg::after { animation: none; }
}

/* ==================== PRINT ==================== */
@media print {
    .site-header, .site-footer, .cta-banner, .nav-toggle { display: none; }
    body { background: white; color: black; }
    .card, .project, .founder, .testimonial { border-color: #ccc; background: white; box-shadow: none; }
}