/* ==========================================================================
   B3N INDUSTRIES — TCD-001
   Design system: "Technical Control Document"
   Ink ground, silver hairlines, one hot signal (orange), mono annotation.
   Zero JavaScript. Scroll reveals are progressive enhancement only.
   ========================================================================== */

:root {
    /* --- Brand marks (sampled from the Aug 2026 TCD artwork) --- */
    --brand-blue:   #365fab;
    --brand-orange: #e57224;
    --brand-teal:   #116e6b;
    --brand-slate:  #40576b;
    --brand-silver: #a7a9ac;
    --brand-black:  #221f1f;

    /* --- Surface --- */
    --ink:        #0b0c0e;
    --ink-raise:  #101216;
    --ink-sink:   #07080a;
    --bone:       #edebe6;
    --muted:      #868d97;
    --faint:      #5b626c;

    --line:        rgba(167, 169, 172, 0.16);
    --line-strong: rgba(167, 169, 172, 0.34);

    /* --- Type --- */
    --f-display: 'Archivo', 'Arial Black', sans-serif;
    --f-mono:    'IBM Plex Mono', ui-monospace, 'Courier New', monospace;
    --f-body:    'IBM Plex Sans', 'Segoe UI', sans-serif;

    /* --- Theme: signal (default) --- */
    --accent:       var(--brand-orange);
    --accent-ink:   var(--brand-black);
    --accent-wash:  rgba(229, 114, 36, 0.05);
    --glow-a:       rgba(229, 114, 36, 0.13);
    --glow-b:       rgba(54, 95, 171, 0.12);
    --glow-plate:   rgba(229, 114, 36, 0.16);
    --swatch-next:  var(--brand-blue);

    /* --- Metrics --- */
    --gutter: clamp(18px, 5vw, 84px);
    --ease:   cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Theme: blue ------------------------------------------------------- */
[data-theme="blue"] {
    --accent:      var(--brand-blue);
    --accent-ink:  var(--bone);
    --accent-wash: rgba(54, 95, 171, 0.06);
    --glow-a:      rgba(54, 95, 171, 0.16);
    --glow-b:      rgba(167, 169, 172, 0.07);
    --glow-plate:  rgba(54, 95, 171, 0.2);
    --swatch-next: var(--brand-orange);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    min-height: 100vh;
    background-color: var(--ink);
    color: var(--bone);
    font-family: var(--f-body);
    font-weight: 300;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Fixed atmosphere: drafting grid + signal glow + film grain -------------- */
.backdrop {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background-color: var(--ink);
    background-image:
        radial-gradient(60% 45% at 78% 8%, var(--glow-a) 0%, transparent 70%),
        radial-gradient(50% 40% at 8% 82%, var(--glow-b) 0%, transparent 72%),
        linear-gradient(rgba(167, 169, 172, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(167, 169, 172, 0.045) 1px, transparent 1px),
        linear-gradient(rgba(167, 169, 172, 0.09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(167, 169, 172, 0.09) 1px, transparent 1px);
    background-size: auto, auto, 24px 24px, 24px 24px, 120px 120px, 120px 120px;
}

.grain {
    position: fixed;
    inset: -50%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.4;
    mix-blend-mode: overlay;
    background-image: url("images/grain.svg");
}

/* ---- Shared type utilities --------------------------------------------- */
.display {
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 116, 'wght' 900;
    text-transform: uppercase;
    line-height: 0.85;
    letter-spacing: -0.015em;
}

.mono {
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.hot  { color: var(--accent); }
.cool { color: var(--brand-blue); }

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px var(--gutter);
    border-bottom: 1px solid var(--line);
    background: rgba(11, 12, 14, 0.72);
    backdrop-filter: blur(16px) saturate(130%);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
}

.nav__mark { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.nav__mark img { height: 26px; width: auto; display: block; }

.nav__mark .sig {
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.3em;
    color: var(--faint);
    padding-left: 14px;
    border-left: 1px solid var(--line);
    line-height: 1.5;
    text-transform: uppercase;
}

.nav__links { display: flex; align-items: center; gap: clamp(16px, 3vw, 40px); }

.nav__links a {
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 7px;
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--muted);
    padding: 6px 0;
    transition: color 0.3s var(--ease);
}

.nav__links a i { font-style: normal; font-size: 9px; color: var(--faint); transition: color 0.3s var(--ease); }

.nav__links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.35s var(--ease);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] { color: var(--bone); }
.nav__links a:hover i { color: var(--accent); }
.nav__links a:hover::after,
.nav__links a[aria-current="page"]::after { width: 100%; }

@media (max-width: 620px) {
    .nav { flex-wrap: wrap; gap: 10px 16px; padding-bottom: 10px; }
    .nav__mark .sig { display: none; }
    .nav__links { width: 100%; justify-content: flex-start; gap: 24px; }
    .nav__links a { font-size: 9.5px; letter-spacing: 0.12em; padding: 2px 0; }
    .nav__links a i { display: none; }
}

/* ==========================================================================
   VERTICAL EDGE RAIL (decorative)
   ========================================================================== */
.rail {
    position: fixed;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    pointer-events: none;
}

.rail span {
    writing-mode: vertical-rl;
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    color: var(--faint);
}

.rail .tick { width: 1px; height: 90px; background: linear-gradient(var(--line-strong), transparent); }

@media (max-width: 1240px) { .rail { display: none; } }

/* ==========================================================================
   SECTION FRAME
   ========================================================================== */
.section { padding: clamp(72px, 11vw, 152px) var(--gutter); position: relative; }
.section--tight { padding-top: clamp(48px, 7vw, 96px); }

.section__head {
    display: flex;
    align-items: baseline;
    justify-content: flex-start;
    gap: clamp(14px, 2vw, 26px);
    padding-bottom: 18px;
    margin-bottom: clamp(36px, 5vw, 64px);
    border-bottom: 1px solid var(--line);
}

.section__head h2 {
    font-family: var(--f-display);
    font-weight: 800;
    font-variation-settings: 'wdth' 112, 'wght' 800;
    font-size: clamp(1.6rem, 3.4vw, 2.9rem);
    text-transform: uppercase;
    letter-spacing: -0.01em;
    line-height: 1;
}

.section__head .idx {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.24em;
    color: var(--accent);
}

.section__head .note {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--faint);
    text-align: right;
    margin-left: auto;
}

@media (max-width: 660px) {
    .section__head { flex-wrap: wrap; }
    .section__head .note { text-align: left; width: 100%; margin-left: 0; }
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: center;
    gap: clamp(28px, 5vw, 76px);
    padding: clamp(18px, 2.4vw, 34px) var(--gutter) clamp(26px, 4vw, 52px);
}

.hero__stamp {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 26px;
    padding: 5px 12px 5px 10px;
    border: 1px solid var(--line-strong);
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--muted);
}

.hero__stamp b {
    width: 6px;
    height: 6px;
    background: var(--accent);
    display: inline-block;
    animation: pulse 2.6s ease-in-out infinite;
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

.hero h1 {
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 118, 'wght' 900;
    font-size: clamp(2.7rem, 5.9vw, 5.2rem);
    line-height: 0.84;
    letter-spacing: -0.025em;
    text-transform: uppercase;
    margin-bottom: 26px;
}

.hero h1 .ghost {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--brand-silver);
    opacity: 0.72;
}

.hero__lede {
    max-width: 46ch;
    font-size: clamp(0.98rem, 1.15vw, 1.08rem);
    line-height: 1.75;
    color: var(--muted);
    padding-left: 18px;
    border-left: 1px solid var(--line-strong);
    margin-bottom: 34px;
}

.hero__lede strong { color: var(--bone); font-weight: 500; }

/* Actions ---------------------------------------------------------------- */
.actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 15px 26px;
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    text-decoration: none;
    overflow: hidden;
    transition: transform 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn--solid {
    background: var(--accent);
    color: var(--accent-ink);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.btn--solid::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--bone);
    transform: translateY(101%);
    transition: transform 0.4s var(--ease);
    z-index: 0;
}

.btn--solid span { position: relative; z-index: 1; }
.btn--solid:hover::before { transform: translateY(0); }
.btn--solid:hover { transform: translateY(-2px); }

.btn--wire { color: var(--bone); border: 1px solid var(--line-strong); background: transparent; }
.btn--wire:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.btn .arrow { transition: transform 0.35s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* Product drawing plate --------------------------------------------------- */
.plate {
    position: relative;
    display: grid;
    place-items: center;
    padding: clamp(28px, 4vw, 54px);
    min-height: clamp(340px, 46vw, 560px);
    border: 1px solid var(--line);
    background:
        linear-gradient(160deg, rgba(167, 169, 172, 0.05), transparent 62%),
        rgba(7, 8, 10, 0.45);
}

.plate::before,
.plate::after {
    content: "";
    position: absolute;
    width: 22px;
    height: 22px;
    border: 1px solid var(--accent);
}

.plate::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.plate::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.plate__glow {
    position: absolute;
    width: 62%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, var(--glow-plate) 0%, transparent 68%);
    filter: blur(6px);
    pointer-events: none;
}

.plate__ring {
    position: absolute;
    width: min(78%, 380px);
    aspect-ratio: 1;
    border: 1px dashed rgba(167, 169, 172, 0.18);
    border-radius: 50%;
    animation: spin 46s linear infinite;
    pointer-events: none;
}

@keyframes spin { to { transform: rotate(360deg); } }

.plate .product {
    position: relative;
    width: 100%;
    max-width: 296px;
    height: auto;
    filter: drop-shadow(-14px 22px 40px rgba(0, 0, 0, 0.8));
    animation: float 7s ease-in-out infinite;
    transition: transform 0.6s var(--ease);
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-12px) rotate(-0.8deg); }
}

/* Nothing inside the drawing plate is text you would want to select. */
.plate,
.plate * {
    -webkit-user-select: none;
    user-select: none;
}

.plate img,
.plate svg { -webkit-user-drag: none; }

/* Grab handle: drag the unit around, let go and it returns to the drawing. */
.plate__grab {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    cursor: grab;
    touch-action: pan-y;
    transition: transform 0.72s cubic-bezier(0.2, 1.42, 0.36, 1);
    will-change: transform;
}

.plate__grab:active { cursor: grabbing; }

.plate__grab.is-dragging {
    cursor: grabbing;
    transition: none;
    z-index: 2;
}

.plate__grab.is-dragging .product { animation-play-state: paused; }

.dim {
    position: absolute;
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--faint);
    white-space: nowrap;
}

.dim--w  { left: 50%; bottom: 14px; transform: translateX(-50%); }
.dim--h  { right: 12px; top: 50%; transform: translateY(-50%) rotate(90deg); }
.dim--id { left: 16px; top: 14px; color: var(--brand-silver); }

.callout {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
}

.callout::before { content: ""; width: 26px; height: 1px; background: var(--line-strong); }
.callout b { color: var(--accent); font-weight: 600; }
.callout--a { left: 12px; top: 28%; }
.callout--b { right: 12px; bottom: 26%; flex-direction: row-reverse; }

@media (max-width: 1000px) {
    .hero { grid-template-columns: 1fr; }
    .callout { display: none; }
}

/* Stat rail -------------------------------------------------------------- */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin: 0 var(--gutter);
}

.stats div {
    padding: 22px 20px;
    border-left: 1px solid var(--line);
    transition: background 0.4s var(--ease);
}

.stats div:first-child { border-left: 0; }
.stats div:hover { background: rgba(167, 169, 172, 0.04); }

.stats dt {
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--faint);
    margin-bottom: 8px;
}

.stats dd {
    font-family: var(--f-display);
    font-weight: 700;
    font-variation-settings: 'wdth' 110, 'wght' 700;
    font-size: clamp(1.35rem, 2.6vw, 2.1rem);
    line-height: 1;
    letter-spacing: -0.01em;
}

.stats dd small {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-left: 4px;
}

@media (max-width: 760px) {
    .stats { grid-template-columns: repeat(2, 1fr); }
    .stats div:nth-child(3) { border-left: 0; }
    .stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
}

/* ==========================================================================
   SIGNAL BAND (orange texture marquee)
   ========================================================================== */
.band {
    position: relative;
    overflow: hidden;
    padding: 18px 0;
    background: var(--accent) url("images/background-candidate1.png") center / cover;
    border-top: 1px solid rgba(34, 31, 31, 0.35);
    border-bottom: 1px solid rgba(34, 31, 31, 0.35);
}

.band__track { display: flex; width: max-content; animation: slide 34s linear infinite; }

.band__track span {
    display: inline-flex;
    align-items: center;
    gap: 30px;
    padding-right: 30px;
    font-family: var(--f-display);
    font-weight: 800;
    font-variation-settings: 'wdth' 112, 'wght' 800;
    font-size: clamp(1.1rem, 2.4vw, 1.85rem);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--brand-black);
    white-space: nowrap;
}

.band__track em {
    font-style: normal;
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.3em;
    opacity: 0.7;
}

[data-theme="blue"] .band { background-image: url("images/background2.png"); }

/* Black type is legible on the orange wall, not on the blue one. */
[data-theme="blue"] .band__track span { color: var(--bone); }
[data-theme="blue"] .band__track em { opacity: 0.62; }

@keyframes slide { to { transform: translateX(-50%); } }

/* ==========================================================================
   BUILD SEQUENCE
   ========================================================================== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }

.step {
    position: relative;
    padding: 34px 26px 44px;
    border-left: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    transition: background 0.45s var(--ease);
}

.step:first-child { border-left: 0; }

.step::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.5s var(--ease);
}

.step:hover { background: var(--accent-wash); }
.step:hover::after { width: 100%; }

.step .num {
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 116, 'wght' 900;
    font-size: clamp(2.6rem, 5vw, 4.2rem);
    line-height: 1;
    color: transparent;
    -webkit-text-stroke: 1px rgba(167, 169, 172, 0.42);
    margin-bottom: 20px;
    transition: color 0.45s var(--ease), -webkit-text-stroke-color 0.45s var(--ease);
}

.step:hover .num { color: var(--accent); -webkit-text-stroke-color: transparent; }

.step h3 { font-family: var(--f-body); font-weight: 500; font-size: 1.02rem; letter-spacing: 0.02em; margin-bottom: 10px; }
.step p { font-size: 0.9rem; line-height: 1.7; color: var(--muted); }

.step .tag {
    position: absolute;
    top: 34px;
    right: 26px;
    font-family: var(--f-mono);
    font-size: 9px;
    letter-spacing: 0.2em;
    color: var(--faint);
}

@media (max-width: 980px) {
    .steps { grid-template-columns: repeat(2, 1fr); }
    .step:nth-child(3) { border-left: 0; }
}

@media (max-width: 560px) {
    .steps { grid-template-columns: 1fr; }
    .step { border-left: 0; }
}

/* ==========================================================================
   SPECIFICATION
   ========================================================================== */
.spec-wrap {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: clamp(30px, 5vw, 72px);
    align-items: start;
}

.spec .row {
    display: flex;
    align-items: baseline;
    gap: 14px;
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
}

.spec .row:first-child { border-top: 1px solid var(--line); }

.spec dt {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--faint);
    flex: 0 0 auto;
}

.spec .lead {
    flex: 1 1 auto;
    height: 1px;
    background-image: linear-gradient(90deg, var(--line-strong) 40%, transparent 40%);
    background-size: 5px 1px;
    transform: translateY(-3px);
}

.spec dd {
    font-family: var(--f-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--bone);
    flex: 0 0 auto;
    transition: color 0.3s var(--ease);
}

.spec .row:hover dd { color: var(--accent); }

.notice {
    padding: 28px;
    border: 1px solid var(--line);
    background: linear-gradient(150deg, rgba(54, 95, 171, 0.09), transparent 60%);
}

.notice h4 {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--brand-blue);
    margin-bottom: 14px;
}

.notice p { font-size: 0.93rem; color: var(--muted); line-height: 1.75; }
.notice p + p { margin-top: 12px; }

@media (max-width: 900px) { .spec-wrap { grid-template-columns: 1fr; } }

/* ==========================================================================
   IDENTITY / COLOURWAYS
   ========================================================================== */
.marks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 1px;
    background: rgba(34, 31, 31, 0.22);
    border: 1px solid var(--line);
}

.mark {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 22px;
    padding: 26px 22px 20px;
    background: var(--bone);
    transition: background 0.45s var(--ease);
}

.mark img {
    width: 100%;
    max-width: 168px;
    height: auto;
    align-self: center;
    margin: auto 0;
    transition: transform 0.5s var(--ease);
}

.mark:hover { background: #f7f5f1; }
.mark:hover img { transform: scale(1.05); }

.mark .meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-top: 14px;
    border-top: 1px solid rgba(34, 31, 31, 0.18);
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(34, 31, 31, 0.62);
}

.mark .chip { width: 12px; height: 12px; flex: 0 0 auto; }

/* Tiles sit on bone: the lockups carry black elements by design. */

/* ==========================================================================
   CLOSING CALL
   ========================================================================== */
.close {
    position: relative;
    overflow: hidden;
    padding: clamp(72px, 11vw, 148px) var(--gutter);
    border-top: 1px solid var(--line);
    text-align: center;
}

.close__mark {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(120%, 1100px);
    opacity: 0.05;
    pointer-events: none;
    filter: grayscale(1);
}

.close h2 {
    position: relative;
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 118, 'wght' 900;
    font-size: clamp(2.1rem, 6.4vw, 5rem);
    line-height: 0.88;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 22px;
}

.close p { position: relative; max-width: 52ch; margin: 0 auto 36px; color: var(--muted); }
.close .actions { position: relative; justify-content: center; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.foot {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 34px;
    padding: 48px var(--gutter) 26px;
    border-top: 1px solid var(--line);
    background: var(--ink-sink);
}

.foot img { height: 34px; width: auto; margin-bottom: 16px; }
.foot p { font-size: 0.86rem; color: var(--faint); max-width: 34ch; }

.foot h5 {
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
}

.foot ul { list-style: none; display: grid; gap: 9px; }

.foot a {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--faint);
    text-decoration: none;
    transition: color 0.3s var(--ease);
}

.foot a:hover { color: var(--accent); }

.foot__base {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 14px var(--gutter);
    border-top: 1px solid var(--line);
    background: var(--ink-sink);
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--faint);
}

@media (max-width: 780px) { .foot { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot { grid-template-columns: 1fr; } }

/* ==========================================================================
   INTERIOR PAGES
   ========================================================================== */
.page-head {
    padding: clamp(56px, 9vw, 120px) var(--gutter) clamp(34px, 5vw, 60px);
    border-bottom: 1px solid var(--line);
}

.page-head .idx {
    display: block;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 18px;
}

.page-head h1 {
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 118, 'wght' 900;
    font-size: clamp(2.6rem, 7.4vw, 5.8rem);
    line-height: 0.84;
    letter-spacing: -0.025em;
    text-transform: uppercase;
    margin-bottom: 22px;
}

.page-head h1 .ghost { color: transparent; -webkit-text-stroke: 1.5px var(--brand-silver); opacity: 0.72; }
.page-head p { max-width: 56ch; color: var(--muted); }

.prose-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: clamp(28px, 5vw, 76px);
    align-items: start;
}

.prose-grid h3 {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--brand-silver);
}

.prose p { font-size: 1.02rem; line-height: 1.8; color: var(--muted); }
.prose p + p { margin-top: 20px; }
.prose p strong { color: var(--bone); font-weight: 500; }

@media (max-width: 860px) { .prose-grid { grid-template-columns: 1fr; } }

/* Log / timeline ---------------------------------------------------------- */
.log { border-top: 1px solid var(--line); }

.log__row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
    transition: padding-left 0.4s var(--ease), background 0.4s var(--ease);
}

.log__row:hover { padding-left: 14px; background: rgba(167, 169, 172, 0.03); }

.log__row time {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    padding-top: 4px;
}

.log__row h4 { font-family: var(--f-body); font-weight: 500; font-size: 1.02rem; margin-bottom: 6px; }
.log__row p { font-size: 0.92rem; color: var(--muted); max-width: 62ch; }

@media (max-width: 620px) { .log__row { grid-template-columns: 1fr; gap: 8px; } }

/* Contact cards ----------------------------------------------------------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 30px 26px 34px;
    background: var(--ink);
    text-decoration: none;
    color: inherit;
    transition: background 0.4s var(--ease);
}

.card:hover { background: var(--ink-raise); }

.card .k {
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--faint);
}

.card .v {
    font-family: var(--f-display);
    font-weight: 700;
    font-variation-settings: 'wdth' 110, 'wght' 700;
    font-size: clamp(1.05rem, 1.8vw, 1.3rem);
    text-transform: uppercase;
    word-break: break-word;
}

.card .d { font-size: 0.88rem; color: var(--muted); }

a.card::after {
    content: "\2192";
    position: absolute;
    right: 24px;
    bottom: 28px;
    color: var(--faint);
    transition: transform 0.35s var(--ease), color 0.35s var(--ease);
}

a.card:hover::after { transform: translateX(4px); color: var(--accent); }

/* ==========================================================================
   MOTION — entry choreography + scroll reveal (progressive enhancement)
   ========================================================================== */
@keyframes riseIn {
    from { opacity: 0; transform: translateY(26px); }
    to   { opacity: 1; transform: none; }
}

.rise { animation: riseIn 0.9s var(--ease) both; }
.d1 { animation-delay: 0.06s; }
.d2 { animation-delay: 0.14s; }
.d3 { animation-delay: 0.22s; }
.d4 { animation-delay: 0.3s; }
.d5 { animation-delay: 0.4s; }
.d6 { animation-delay: 0.5s; }

/* Reveal on scroll only where the browser supports scroll-driven animation.
   Outside @supports the content simply renders — no JS, nothing ever hidden. */
@supports (animation-timeline: view()) {
    .reveal {
        animation: riseIn 1s var(--ease) both;
        animation-timeline: view();
        animation-range: entry 4% cover 26%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   ONE-SCREEN SHEET (contact) — everything inside a single viewport
   ========================================================================== */
body.sheet {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

body.sheet .nav { position: static; }

.sheet__main {
    flex: 1 1 auto;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(24px, 4vw, 68px);
    align-items: center;
    padding: clamp(16px, 3vh, 44px) var(--gutter);
}

.sheet__lead .idx {
    display: block;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: clamp(10px, 1.6vh, 18px);
}

.sheet__lead h1 {
    font-family: var(--f-display);
    font-weight: 900;
    font-variation-settings: 'wdth' 118, 'wght' 900;
    font-size: clamp(2.1rem, min(4.6vw, 7.6vh), 4.6rem);
    line-height: 0.86;
    letter-spacing: -0.025em;
    text-transform: uppercase;
    margin-bottom: clamp(12px, 2vh, 22px);
}

.sheet__lead h1 .ghost { color: transparent; -webkit-text-stroke: 1.5px var(--brand-silver); opacity: 0.72; }

.sheet__lead > p {
    max-width: 42ch;
    font-size: clamp(0.86rem, 1vw, 1rem);
    line-height: 1.7;
    color: var(--muted);
}

.sheet__mail {
    display: inline-block;
    margin: clamp(14px, 2.4vh, 26px) 0 clamp(10px, 1.6vh, 16px);
    padding-bottom: 4px;
    border-bottom: 1px solid var(--line-strong);
    font-family: var(--f-mono);
    font-size: clamp(0.8rem, 1.05vw, 0.98rem);
    letter-spacing: 0.06em;
    color: var(--bone);
    text-decoration: none;
    transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.sheet__mail:hover { color: var(--accent); border-color: var(--accent); }

.sheet__note {
    max-width: 40ch;
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    line-height: 1.9;
    color: var(--faint);
}

.sheet__cards {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    align-self: center;
    width: 100%;
    height: min(100%, 520px);
}

.sheet__cards .card { justify-content: center; }

.sheet__cards .card { padding: clamp(16px, 2.6vh, 28px) clamp(16px, 1.6vw, 24px); gap: clamp(6px, 1vh, 11px); }
.sheet__cards .card .v { font-size: clamp(0.95rem, 1.35vw, 1.2rem); }
.sheet__cards .card .d { font-size: clamp(0.76rem, 0.86vw, 0.86rem); line-height: 1.6; }
.sheet__cards a.card::after { right: 18px; bottom: 16px; }

body.sheet .foot__base { flex: 0 0 auto; }

@media (max-width: 900px) {
    .sheet__main {
        grid-template-columns: 1fr;
        align-content: center;
        gap: clamp(16px, 2.6vh, 30px);
    }
    .sheet__note { display: none; }
    .sheet__lead > p { max-width: 52ch; }
}

@media (max-width: 560px) {
    .sheet__cards .card .d { display: none; }
    .sheet__cards a.card::after { bottom: 14px; }
    .sheet__lead > p { font-size: 0.85rem; }
}

/* Below this height a single screen would clip: let the page scroll instead. */
@media (max-height: 560px) {
    body.sheet { height: auto; overflow: visible; }
    .sheet__cards .card .d { display: block; }
}

/* ==========================================================================
   THEME SWITCH
   ========================================================================== */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-left: clamp(14px, 2vw, 28px);
    padding: 6px 12px 6px 9px;
    border: 1px solid var(--line-strong);
    background: transparent;
    color: var(--muted);
    font-family: var(--f-mono);
    font-size: 9.5px;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.theme-toggle:hover { color: var(--bone); border-color: var(--swatch-next); }
.theme-toggle:focus-visible { outline: 1px solid var(--swatch-next); outline-offset: 2px; }

.theme-toggle__dot {
    width: 11px;
    height: 11px;
    flex: 0 0 auto;
    background: var(--swatch-next);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.35);
    transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}

.theme-toggle:hover .theme-toggle__dot { transform: scale(1.15); }

.theme-toggle .t-blue { display: inline; }
.theme-toggle .t-signal { display: none; }
[data-theme="blue"] .theme-toggle .t-blue { display: none; }
[data-theme="blue"] .theme-toggle .t-signal { display: inline; }

@media (max-width: 620px) {
    .theme-toggle { margin-left: auto; padding: 5px 10px 5px 8px; }
}

/* Brief cross-fade while the palette swaps. */
.theme-shift,
.theme-shift *,
.theme-shift *::before,
.theme-shift *::after {
    transition: background-color 0.42s ease, border-color 0.42s ease,
                color 0.42s ease, fill 0.42s ease, stroke 0.42s ease !important;
}

/* The drawing follows the accent too. */
.product .stitch { stroke: var(--accent); }
.product .diag   { fill: var(--accent); }