/* ============================================================
   archetype.boo  --  Municipal Specimen Series I
   Bauhaus foundation-course portfolio on a blueprint wall.
   Palette: navy-metallic / grounded-earthy / urban-industrial
   ============================================================ */

/* ---------- Color tokens ---------- */
:root {
    --steel-navy:     #0B1A2E;
    --midnight-slate: #1E3A5F;
    --blueprint:      #3D5A80;
    --bronze:         #8B7355;
    --brass:          #B8956A;
    --silver:         #C7CFD6;
    --slate-grey:     #4A5568;
    --gunmetal:       #1F2937;
    --concrete:       #E4E8EB;
    --paper:          #F2EFE8;
    --rule-light:     #D0D7DE;

    --rail-w: 96px;
    --baseline: 8px;
    --bezier:    cubic-bezier(0.33, 1, 0.68, 1);

    --grid-opacity: 0.12;
}

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

html {
    scroll-behavior: smooth;
    background: var(--concrete);
}

body {
    font-family: "Commissioner", "Inter", "Lato", system-ui, sans-serif;
    font-size: 16px;
    line-height: 24px; /* 8px multiple */
    color: var(--gunmetal);
    background: var(--concrete);
    overflow-x: hidden;
    position: relative;
    padding-left: var(--rail-w);
}

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- Baseline grid ---------- */
.baseline-grid {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image:
        repeating-linear-gradient(to bottom, transparent 0 7px, var(--silver) 7px 8px);
    opacity: var(--grid-opacity);
    transition: opacity 320ms var(--bezier);
}

.baseline-grid--bright { --grid-opacity: 0.40; }

/* ---------- Grid toggle ---------- */
.grid-toggle {
    position: fixed;
    right: 24px;
    top: 24px;
    z-index: 50;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--paper);
    color: var(--steel-navy);
    border: 1px solid var(--steel-navy);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: background 200ms var(--bezier), color 200ms var(--bezier);
}

.grid-toggle:hover { background: var(--steel-navy); color: var(--concrete); }

.grid-toggle__bar {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 1px solid currentColor;
    background:
        repeating-linear-gradient(to bottom, transparent 0 1px, currentColor 1px 2px);
}

/* ============================================================
   SIDEBAR  (filing-cabinet drawer label)
   ============================================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--rail-w);
    height: 100vh;
    background: var(--steel-navy);
    background-image:
        repeating-linear-gradient(0deg, rgba(199,207,214,0.04) 0 1px, transparent 1px 3px),
        repeating-linear-gradient(90deg, rgba(199,207,214,0.03) 0 1px, transparent 1px 4px);
    color: var(--concrete);
    z-index: 40;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0 16px;
    border-right: 1px solid var(--silver);
}

.sidebar__wordmark {
    flex: 0 0 auto;
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.sidebar__wordmark span {
    font-family: "Anybody", sans-serif;
    font-variation-settings: 'wght' 600, 'wdth' 100;
    font-size: 18px;
    letter-spacing: 0.08em;
    transform: rotate(-90deg);
    white-space: nowrap;
    color: var(--silver);
}

.sidebar__nav {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 8px;
    width: 100%;
    align-items: stretch;
}

.nav-chip {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 64px;
    background: transparent;
    border: 1px solid var(--silver);
    color: var(--silver);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    font-family: "Archivo Narrow", sans-serif;
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: background 240ms var(--bezier), color 240ms var(--bezier), transform 240ms var(--bezier);
}

.nav-chip__num {
    font-size: 9px;
    opacity: 0.65;
    margin-bottom: 4px;
}

.nav-chip:hover,
.nav-chip.is-active {
    background: var(--blueprint);
    color: var(--paper);
}

.sidebar__compass {
    flex: 0 0 auto;
    font-family: "Archivo Narrow", sans-serif;
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--silver);
    padding-top: 8px;
    border-top: 1px solid var(--silver);
    width: calc(100% - 16px);
    text-align: center;
}

/* ============================================================
   PLATES
   ============================================================ */
.page { position: relative; z-index: 2; }

.plate {
    position: relative;
    padding: 64px 64px 96px;
    border-bottom: 1px solid var(--steel-navy);
}

.plate--atelier {
    background: var(--steel-navy);
    color: var(--concrete);
}

.plate--correspondence { background: var(--paper); }
.plate--plan { background: var(--concrete); }

.plate__rule {
    display: flex;
    align-items: center;
    gap: 16px;
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--slate-grey);
    margin-bottom: 48px;
}

.plate__rule--invert { color: var(--silver); }
.plate__rule-line { flex: 1; height: 1px; background: currentColor; opacity: 0.5; }
.plate__code { color: var(--steel-navy); }
.plate__rule--invert .plate__code { color: var(--silver); }

/* ============================================================
   INDEX PLATE
   ============================================================ */
.plate--index {
    min-height: 100vh;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: auto auto auto auto;
    gap: 24px 16px;
    align-content: start;
}

.plate--index .plate__rule { grid-column: 1 / -1; }

.primitives {
    grid-column: 5 / 9;
    grid-row: 2;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: end;
    justify-items: center;
}

.primitive {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: transform 320ms var(--bezier);
}

.primitive svg { width: 144px; height: 144px; display: block; }

.primitive__label {
    font-family: "Archivo Narrow", sans-serif;
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--slate-grey);
    text-transform: uppercase;
}

.primitive:hover { transform: translateY(-4px); }

.wordmark {
    grid-column: 2 / 12;
    grid-row: 3;
    text-align: center;
    margin-top: 16px;
    font-family: "Anybody", sans-serif;
    font-variation-settings: 'wght' 300, 'wdth' 100;
    font-size: clamp(4rem, 9vw, 8rem);
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--steel-navy);
    transition: font-variation-settings 600ms var(--bezier);
    will-change: font-variation-settings;
}

.wordmark__line { display: block; }
.wordmark__line--alt { color: var(--bronze); }

.index-meta {
    grid-column: 2 / 12;
    grid-row: 4;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--steel-navy);
}

.caption {
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--slate-grey);
    margin-bottom: 16px;
    line-height: 16px;
}

.caption--invert { color: var(--silver); }

.body {
    font-size: 16px;
    line-height: 24px;
    color: var(--gunmetal);
}

.body--invert { color: var(--concrete); }

.specimen-list { list-style: none; }
.specimen-list li { padding: 4px 0; border-bottom: 1px solid var(--silver); display: flex; gap: 12px; }
.specimen-list .ord {
    font-family: "Archivo Narrow", sans-serif;
    color: var(--bronze);
    width: 24px;
    flex: 0 0 auto;
}

.manhole {
    position: absolute;
    right: 64px;
    bottom: 64px;
    width: 220px;
    height: 220px;
    opacity: 0.85;
    animation: manholeSpin 120s linear infinite;
}

.manhole svg { width: 100%; height: 100%; }

@keyframes manholeSpin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* ============================================================
   FRIEZE  (mechanical conveyor belt)
   ============================================================ */
.frieze {
    width: 100%;
    height: 32px;
    background: var(--steel-navy);
    overflow: hidden;
    position: relative;
}

.frieze--alt { background: var(--paper); }

.frieze__svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* ============================================================
   SPECIMENS PLATE
   ============================================================ */
.section-heading {
    font-family: "Anybody", sans-serif;
    font-variation-settings: 'wght' 600, 'wdth' 100;
    font-size: clamp(3rem, 7vw, 5.5rem);
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--steel-navy);
    margin-bottom: 16px;
    transition: font-variation-settings 600ms var(--bezier);
    will-change: font-variation-settings;
}

.section-heading--invert { color: var(--paper); }

.section-sub {
    max-width: 56ch;
    color: var(--slate-grey);
    font-size: 16px;
    line-height: 24px;
    margin-bottom: 64px;
}

.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.card {
    grid-column: span 4;
    background: var(--paper);
    border: 1px solid var(--steel-navy);
    padding: 16px;
    display: flex;
    flex-direction: column;
    min-height: 384px; /* 48 baseline units */
    color: var(--steel-navy);
    transform-origin: left center;
    transform: rotateY(-8deg);
    opacity: 0;
    transition: transform 400ms var(--bezier), opacity 400ms var(--bezier), background 200ms var(--bezier);
    position: relative;
}

.card.is-flipped {
    transform: rotateY(0deg);
    opacity: 1;
}

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

.card::before {
    content: "";
    position: absolute;
    inset: 4px;
    border: 1px dashed var(--silver);
    pointer-events: none;
}

.card__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: "Archivo Narrow", sans-serif;
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--slate-grey);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--silver);
    margin-bottom: 16px;
}

.card__tag {
    color: var(--bronze);
}

.card__icon {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--steel-navy);
    margin: 16px 0;
}

.card__icon svg { width: 100%; max-width: 200px; height: auto; max-height: 160px; }

.card__title {
    font-family: "Big Shoulders Display", sans-serif;
    font-weight: 700;
    font-size: clamp(1.25rem, 1.6vw, 1.5rem);
    line-height: 24px;
    letter-spacing: 0.02em;
    color: var(--steel-navy);
    margin-bottom: 8px;
}

.card__meta {
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--slate-grey);
    line-height: 16px;
}

/* ============================================================
   ATELIER PLATE
   ============================================================ */
.atelier-body {
    display: grid;
    grid-template-columns: 3fr 5fr 3fr;
    gap: 48px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--silver);
}

.atelier-body__col--lead .lede {
    font-family: "Big Shoulders Display", sans-serif;
    font-weight: 400;
    font-size: clamp(1.5rem, 2.2vw, 2rem);
    line-height: 32px; /* 8 mult */
    color: var(--paper);
    letter-spacing: 0.01em;
}

.atelier-body .body { color: var(--concrete); margin-bottom: 16px; }

.meta-list { list-style: none; }
.meta-list li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--midnight-slate);
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.meta-list .meta-key { color: var(--silver); }
.meta-list .meta-val { color: var(--brass); }

/* ============================================================
   CORRESPONDENCE PLATE
   ============================================================ */
.correspondence-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.corr-card {
    grid-column: span 4;
    border: 1px solid var(--steel-navy);
    padding: 24px;
    background: var(--concrete);
    position: relative;
    min-height: 192px;
}

.corr-card--wide {
    grid-column: span 12;
    background: var(--paper);
    margin-top: 16px;
}

.corr-card__index {
    position: absolute;
    top: 16px;
    right: 24px;
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--bronze);
}

.corr-card__title {
    font-family: "Big Shoulders Display", sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    line-height: 32px;
    color: var(--steel-navy);
    letter-spacing: 0.02em;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--silver);
}

.corr-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 16px;
}

.corr-form__row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.corr-form__row--block {
    grid-column: 1 / -1;
}

.corr-form__key {
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--slate-grey);
    text-transform: uppercase;
}

.corr-form__input {
    font-family: "Commissioner", sans-serif;
    font-size: 16px;
    line-height: 24px;
    color: var(--steel-navy);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--steel-navy);
    padding: 4px 0;
    transition: border-color 200ms var(--bezier);
}

.corr-form__input:focus {
    outline: none;
    border-bottom-color: var(--bronze);
}

.corr-form__input--ta {
    border: 1px solid var(--steel-navy);
    padding: 8px;
    resize: vertical;
}

.corr-form__submit {
    grid-column: 1 / -1;
    justify-self: start;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--brass);
    color: var(--steel-navy);
    border: 1px solid var(--steel-navy);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: background 200ms var(--bezier);
}

.corr-form__submit:hover { background: var(--bronze); color: var(--paper); }

.corr-form__note {
    grid-column: 1 / -1;
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--bronze);
    text-transform: uppercase;
    min-height: 16px;
}

/* ============================================================
   PLAN PLATE  (city-block footer map)
   ============================================================ */
.plan-map {
    position: relative;
    width: 100%;
    height: 40vh;
    min-height: 320px;
    margin-top: 48px;
    border: 1px solid var(--steel-navy);
    background: var(--concrete);
}

.plan-map svg { width: 100%; height: 100%; display: block; }

.plan-building rect { transition: fill 200ms var(--bezier); cursor: pointer; }
.plan-building:hover rect { fill: var(--brass); }
.plan-building text { pointer-events: none; }

.plan-street { cursor: pointer; }
.plan-street text { transition: fill 200ms var(--bezier); }
.plan-street:hover text { fill: var(--bronze); }

.plan-tooltip {
    position: absolute;
    pointer-events: none;
    padding: 4px 8px;
    background: var(--steel-navy);
    color: var(--concrete);
    font-family: "Archivo Narrow", sans-serif;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transform: translate(-50%, -150%);
    opacity: 0;
    transition: opacity 160ms var(--bezier);
    white-space: nowrap;
    z-index: 5;
}

.plan-tooltip.is-visible { opacity: 1; }

/* Hover line drawn by JS for primitive nav anchors */
.hover-line {
    position: fixed;
    pointer-events: none;
    background: var(--bronze);
    height: 1px;
    transform-origin: left center;
    z-index: 30;
    opacity: 0;
    transition: opacity 200ms var(--bezier);
}

.hover-line.is-visible { opacity: 1; }

/* ============================================================
   COLOPHON
   ============================================================ */
.colophon {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--steel-navy);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

/* ============================================================
   SCROLL-PROGRESS RIBBON  (top of viewport)
   ============================================================ */
.scroll-ribbon {
    position: fixed;
    top: 0;
    left: var(--rail-w);
    right: 0;
    height: 2px;
    background: var(--silver);
    z-index: 35;
}
.scroll-ribbon__fill {
    height: 100%;
    width: 0%;
    background: var(--bronze);
    transition: width 80ms linear;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
    body { padding-left: 64px; }
    :root { --rail-w: 64px; }
    .nav-chip { font-size: 9px; }
    .nav-chip__num { font-size: 8px; }
    .plate { padding: 48px 32px 64px; }
    .grid-12 .card { grid-column: span 6; }
    .atelier-body { grid-template-columns: 1fr; gap: 32px; }
    .correspondence-grid .corr-card { grid-column: span 6; }
    .corr-form { grid-template-columns: 1fr; }
    .manhole { width: 140px; height: 140px; right: 24px; bottom: 24px; }
    .primitives { grid-column: 1 / -1; }
    .wordmark { grid-column: 1 / -1; }
    .index-meta { grid-column: 1 / -1; grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    body { padding-left: 56px; }
    :root { --rail-w: 56px; }
    .sidebar__wordmark span { font-size: 14px; }
    .grid-12 .card { grid-column: span 12; min-height: 320px; }
    .correspondence-grid .corr-card { grid-column: span 12; }
    .colophon { grid-template-columns: 1fr; }
    .grid-toggle { padding: 6px 10px; font-size: 10px; }
    .grid-toggle__label { display: none; }
    .primitives { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .primitive svg { width: 88px; height: 88px; }
    .primitive__label { font-size: 9px; }
    .plate { padding: 40px 20px 56px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0ms !important;
        animation-duration: 0ms !important;
        animation-iteration-count: 1 !important;
    }
    .card { transform: rotateY(0deg); opacity: 1; }
}