/* ==========================================================================
   supplychain.wiki - Styles
   Isometric logistics blueprint aesthetic
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    --blueprint-cream: #F5F0E1;
    --manifest-ink: #2C2416;
    --shipping-brown: #8B6914;
    --field-red: #C0392B;
    --container-teal: #1A6B5A;
    --warehouse-steel: #5C6670;
    --graph-paper: #EDE8D5;
    --cargo-hold: #1E1B14;
    --grid-line: #D4CFC0;
    --grid-line-light: #E5E1D4;

    --font-display: 'Share Tech Mono', monospace;
    --font-body: 'Source Serif 4', serif;
    --font-annotation: 'Caveat', cursive;

    --iso-skew: skewY(-30deg);
    --iso-rotate: rotate(30deg);

    --column-width: 72ch;
    --sidebar-width: 220px;
    --ticker-height: 40px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    font-weight: 400;
    line-height: 1.75;
    letter-spacing: 0.01em;
    color: var(--manifest-ink);
    background-color: var(--blueprint-cream);
    background-image:
        linear-gradient(var(--grid-line-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line-light) 1px, transparent 1px);
    background-size: 20px 20px;
    padding-bottom: var(--ticker-height);
    overflow-x: hidden;
}

a {
    color: var(--container-teal);
    text-decoration: none;
    border-bottom: 1px dotted var(--container-teal);
    transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover {
    color: var(--shipping-brown);
    border-color: var(--shipping-brown);
}

::selection {
    background-color: var(--container-teal);
    color: var(--blueprint-cream);
}

/* ---------- Scroll Progress (Conveyor Belt) ---------- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 1000;
    background-color: transparent;
    display: flex;
    pointer-events: none;
}

.scroll-progress .segment {
    width: 8px;
    height: 3px;
    margin-right: 2px;
    background-color: var(--container-teal);
    flex-shrink: 0;
    opacity: 0;
    transition: opacity 0.1s ease;
}

.scroll-progress .segment.active {
    opacity: 1;
}

/* ---------- Sidebar (Packing List TOC) ---------- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--blueprint-cream);
    border-right: 1px dotted var(--warehouse-steel);
    padding: 2rem 1rem;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

@media (min-width: 1200px) {
    .sidebar {
        display: block;
    }
}

.sidebar-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--shipping-brown);
}

.sidebar-title {
    display: block;
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--manifest-ink);
    margin-bottom: 0.25rem;
}

.sidebar-subtitle {
    display: block;
    font-family: var(--font-annotation);
    font-size: 0.9rem;
    color: var(--warehouse-steel);
}

.toc-list {
    list-style: none;
}

.toc-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.toc-checkbox {
    display: inline-block;
    width: 12px;
    height: 12px;
    min-width: 12px;
    border: 1.5px solid var(--warehouse-steel);
    margin-top: 4px;
    position: relative;
    transition: border-color 0.3s ease;
}

.toc-item.checked .toc-checkbox {
    border-color: var(--container-teal);
}

.toc-item.checked .toc-checkbox::after {
    content: '';
    position: absolute;
    top: 0px;
    left: 3px;
    width: 4px;
    height: 8px;
    border: solid var(--container-teal);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    animation: checkmark 0.3s ease forwards;
}

@keyframes checkmark {
    from {
        stroke-dashoffset: 20;
        opacity: 0;
    }
    to {
        stroke-dashoffset: 0;
        opacity: 1;
    }
}

.toc-item a {
    font-family: var(--font-display);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--warehouse-steel);
    border: none;
    transition: color 0.2s ease;
    line-height: 1.3;
}

.toc-item a:hover,
.toc-item.active a {
    color: var(--container-teal);
}

.toc-item.checked a {
    color: var(--container-teal);
}

/* ---------- Main Content ---------- */
.main-content {
    max-width: var(--column-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
}

@media (min-width: 1200px) {
    .main-content {
        margin-left: calc(var(--sidebar-width) + ((100vw - var(--sidebar-width)) / 2) - (var(--column-width) / 2));
    }
}

/* Conveyor belt guide rails */
.main-content::before,
.main-content::after {
    content: '';
    position: fixed;
    top: 0;
    bottom: 0;
    width: 1px;
    border-left: 1px dotted var(--grid-line);
    z-index: -1;
    pointer-events: none;
}

.main-content::before {
    left: calc(50% - var(--column-width) / 2 - 1.5rem);
}

.main-content::after {
    right: calc(50% - var(--column-width) / 2 - 1.5rem);
}

@media (min-width: 1200px) {
    .main-content::before {
        left: calc(var(--sidebar-width) + ((100vw - var(--sidebar-width)) / 2) - var(--column-width) / 2 - 2rem);
    }
    .main-content::after {
        left: calc(var(--sidebar-width) + ((100vw - var(--sidebar-width)) / 2) + var(--column-width) / 2 + 2rem);
        right: auto;
    }
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.hero-label {
    background-color: var(--blueprint-cream);
    border: 1px dashed var(--shipping-brown);
    border-radius: 3px;
    padding: 3rem 4rem;
    position: relative;
    max-width: 600px;
}

.label-barcode {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 2px;
    height: 24px;
    align-items: flex-end;
}

.label-barcode span {
    display: block;
    width: 2px;
    background-color: var(--manifest-ink);
}

.label-barcode span:nth-child(1) { height: 18px; }
.label-barcode span:nth-child(2) { height: 24px; }
.label-barcode span:nth-child(3) { height: 12px; }
.label-barcode span:nth-child(4) { height: 20px; }
.label-barcode span:nth-child(5) { height: 16px; }
.label-barcode span:nth-child(6) { height: 24px; }
.label-barcode span:nth-child(7) { height: 10px; }
.label-barcode span:nth-child(8) { height: 22px; }
.label-barcode span:nth-child(9) { height: 14px; }
.label-barcode span:nth-child(10) { height: 20px; }
.label-barcode span:nth-child(11) { height: 8px; }
.label-barcode span:nth-child(12) { height: 18px; }
.label-barcode span:nth-child(13) { height: 24px; }
.label-barcode span:nth-child(14) { height: 12px; }
.label-barcode span:nth-child(15) { height: 16px; }

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--manifest-ink);
    margin-bottom: 0.75rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-family: var(--font-annotation);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--field-red);
    margin-bottom: 1.5rem;
}

.hero-meta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-meta-item {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--warehouse-steel);
}

.hero-scroll-hint {
    position: absolute;
    bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: hintPulse 2s ease-in-out infinite;
}

.scroll-arrow {
    font-size: 1.5rem;
    color: var(--warehouse-steel);
}

.scroll-text {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--warehouse-steel);
}

@keyframes hintPulse {
    0%, 100% { opacity: 0.4; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(6px); }
}

/* ---------- Section Dividers ---------- */
.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin: 2rem 0;
    position: relative;
}

.section-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 0;
    border-top: 1px dashed var(--shipping-brown);
}

.divider-diamond {
    position: relative;
    z-index: 1;
    font-size: 0.7rem;
    color: var(--shipping-brown);
    background-color: var(--blueprint-cream);
    padding: 0 0.5rem;
}

/* ---------- Crate Sections ---------- */
.crate {
    border: 2px solid var(--shipping-brown);
    background-color: var(--blueprint-cream);
    box-shadow: 4px 4px 0 rgba(44, 36, 22, 0.1);
    margin-bottom: 0;
    position: relative;
    padding: 2.5rem 2rem 2rem;
}

.crate-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.crate-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Shipping Label */
.shipping-label {
    position: absolute;
    top: -2px;
    left: -4px;
    background-color: var(--blueprint-cream);
    border: 1px dashed var(--shipping-brown);
    border-radius: 3px;
    padding: 0.35rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateY(-50%);
}

.label-text {
    font-family: var(--font-display);
    font-size: clamp(0.65rem, 1vw, 0.8rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--manifest-ink);
    white-space: nowrap;
}

.label-barcode-small {
    display: flex;
    gap: 1px;
    height: 14px;
    align-items: flex-end;
}

.label-barcode-small span {
    display: block;
    width: 1.5px;
    background-color: var(--manifest-ink);
}

.label-barcode-small span:nth-child(1) { height: 10px; }
.label-barcode-small span:nth-child(2) { height: 14px; }
.label-barcode-small span:nth-child(3) { height: 7px; }
.label-barcode-small span:nth-child(4) { height: 12px; }
.label-barcode-small span:nth-child(5) { height: 9px; }
.label-barcode-small span:nth-child(6) { height: 14px; }
.label-barcode-small span:nth-child(7) { height: 6px; }

/* Crate Content */
.crate-content h2 {
    font-family: var(--font-body);
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    font-weight: 600;
    color: var(--manifest-ink);
    margin-bottom: 1.25rem;
    margin-top: 0.5rem;
}

.crate-content p {
    margin-bottom: 1rem;
}

.crate-content p:last-child {
    margin-bottom: 0;
}

/* ---------- Field Notes (Caveat handwriting) ---------- */
.field-note {
    font-family: var(--font-annotation);
    font-size: clamp(0.9rem, 1.3vw, 1.2rem);
    color: var(--field-red);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-left: 3px solid var(--field-red);
    background-color: rgba(192, 57, 43, 0.03);
    font-style: normal;
    line-height: 1.6;
}

/* ---------- Rubber Stamp ---------- */
.stamp {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.85em;
    letter-spacing: 0.08em;
    color: var(--field-red);
    border: 2px double var(--field-red);
    padding: 0.05em 0.4em;
    transform: rotate(-3deg);
    opacity: 0.85;
    filter: url(#noise);
    white-space: nowrap;
    vertical-align: middle;
}

/* ---------- Term Tags ---------- */
.term-tag {
    font-family: var(--font-display);
    font-size: 0.82em;
    letter-spacing: 0.06em;
    color: var(--container-teal);
    background-color: rgba(26, 107, 90, 0.08);
    padding: 0.1em 0.4em;
    border-radius: 2px;
}

/* ---------- Reference Blocks ---------- */
.reference-block {
    border: 1px dotted var(--warehouse-steel);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    background-color: rgba(237, 232, 213, 0.4);
}

.reference-label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--warehouse-steel);
    margin-bottom: 0.75rem;
}

.reference-list {
    list-style: none;
}

.reference-list li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    padding-left: 0.5rem;
    position: relative;
}

.reference-list li::before {
    content: '\25B8';
    position: absolute;
    left: -0.5rem;
    color: var(--shipping-brown);
}

/* ---------- Principles Grid ---------- */
.principles-grid {
    display: grid;
    gap: 1.25rem;
    margin: 1.5rem 0;
}

.principle-item {
    border: 1px solid var(--grid-line);
    padding: 1.25rem;
    position: relative;
    background-color: var(--blueprint-cream);
}

.principle-number {
    font-family: var(--font-display);
    font-size: 2rem;
    color: rgba(26, 107, 90, 0.15);
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    letter-spacing: 0.05em;
}

.principle-item h3 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--container-teal);
    margin-bottom: 0.5rem;
}

.principle-item p {
    font-size: 0.92rem;
    color: var(--manifest-ink);
    line-height: 1.65;
}

/* ---------- Transport Modes ---------- */
.transport-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin: 1.5rem 0;
}

.mode-card {
    border: 1px solid var(--grid-line);
    padding: 1.25rem;
    text-align: center;
    background-color: var(--blueprint-cream);
    transition: border-color 0.2s ease;
}

.mode-card:hover {
    border-color: var(--container-teal);
}

.mode-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 0.75rem;
}

.mode-icon svg {
    width: 100%;
    height: 100%;
}

.mode-card h3 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--manifest-ink);
    margin-bottom: 0.5rem;
}

.mode-card p {
    font-size: 0.85rem;
    color: var(--warehouse-steel);
    line-height: 1.5;
}

/* ---------- Warehouse Metrics ---------- */
.warehouse-metrics {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 2rem 0;
    padding: 1.5rem 0;
    border-top: 1px dashed var(--shipping-brown);
    border-bottom: 1px dashed var(--shipping-brown);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-family: var(--font-display);
    font-size: 1.8rem;
    letter-spacing: 0.08em;
    color: var(--container-teal);
    line-height: 1;
}

.metric-label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--warehouse-steel);
    margin-top: 0.35rem;
}

/* ---------- Tech Stack ---------- */
.tech-stack {
    margin: 1.5rem 0;
}

.tech-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1rem 0;
    border-bottom: 1px dotted var(--grid-line);
}

.tech-item:last-child {
    border-bottom: none;
}

.tech-label {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--container-teal);
    min-width: 3rem;
    padding-top: 0.15rem;
}

.tech-desc {
    font-size: 0.92rem;
    color: var(--manifest-ink);
    line-height: 1.65;
}

/* ---------- Sustainability Metrics ---------- */
.sustainability-metrics {
    margin: 1.5rem 0;
}

.sus-metric {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1rem 0;
    border-bottom: 1px dotted var(--grid-line);
}

.sus-metric:last-child {
    border-bottom: none;
}

.sus-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
}

.sus-icon svg {
    width: 100%;
    height: 100%;
}

.sus-text strong {
    display: block;
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--manifest-ink);
    margin-bottom: 0.25rem;
}

.sus-text p {
    font-size: 0.9rem;
    color: var(--warehouse-steel);
    line-height: 1.5;
    margin: 0;
}

/* ---------- Diagram Breakout Zone ---------- */
.diagram-zone {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding: 3rem 2rem;
    background-color: var(--graph-paper);
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 20px 20px;
    margin-top: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.diagram-zone-inner {
    max-width: 920px;
    margin: 0 auto;
    position: relative;
}

.diagram-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--warehouse-steel);
    text-align: center;
    margin-bottom: 1.5rem;
}

.flow-diagram {
    width: 100%;
    height: auto;
    display: block;
}

.flow-node {
    cursor: pointer;
}

.flow-node:hover rect {
    stroke: var(--container-teal);
    stroke-width: 2.5;
}

/* Animated dotted lines */
.animated-line {
    animation: flowDash 2s linear infinite;
}

@keyframes flowDash {
    from { stroke-dashoffset: 16; }
    to { stroke-dashoffset: 0; }
}

/* Diagram Tooltip */
.diagram-tooltip {
    position: absolute;
    background-color: var(--blueprint-cream);
    border: 1px dashed var(--shipping-brown);
    border-radius: 3px;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--manifest-ink);
    max-width: 280px;
    box-shadow: 3px 3px 0 rgba(44, 36, 22, 0.1);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 50;
}

.diagram-tooltip.show {
    opacity: 1;
}

/* ---------- Footer ---------- */
.site-footer {
    background-color: var(--cargo-hold);
    padding: 3rem 2rem;
    margin-top: 3rem;
    margin-bottom: var(--ticker-height);
}

.footer-content {
    max-width: var(--column-width);
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    margin-bottom: 1.5rem;
}

.footer-title {
    display: block;
    font-family: var(--font-display);
    font-size: 1.2rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--blueprint-cream);
    margin-bottom: 0.35rem;
}

.footer-tagline {
    display: block;
    font-family: var(--font-annotation);
    font-size: 1rem;
    color: var(--warehouse-steel);
}

.footer-meta {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--warehouse-steel);
    margin-bottom: 1.25rem;
}

.footer-sep {
    margin: 0 0.75rem;
    color: var(--warehouse-steel);
}

.footer-standards {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.term-tag-footer {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--container-teal);
    border: 1px solid rgba(26, 107, 90, 0.3);
    padding: 0.15em 0.5em;
    border-radius: 2px;
}

/* ---------- Ticker Bar ---------- */
.ticker-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--ticker-height);
    background-color: var(--cargo-hold);
    z-index: 1000;
    overflow: hidden;
    display: flex;
    align-items: center;
    border-top: 1px solid rgba(245, 240, 225, 0.1);
}

.ticker-track {
    display: flex;
    width: max-content;
    animation: tickerScroll 90s linear infinite;
}

.ticker-bar:hover .ticker-track {
    animation-play-state: paused;
}

.ticker-content {
    display: flex;
    flex-shrink: 0;
}

@keyframes tickerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.ticker-item {
    display: inline-flex;
    align-items: center;
    padding: 0 3rem;
    white-space: nowrap;
    font-size: 0.85rem;
    color: rgba(245, 240, 225, 0.7);
}

.ticker-item strong {
    font-family: var(--font-display);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--blueprint-cream);
    margin-right: 0.5rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .hero-label {
        padding: 2rem 2.5rem;
    }

    .crate {
        padding: 2rem 1.25rem 1.5rem;
    }

    .shipping-label {
        position: relative;
        top: auto;
        left: auto;
        transform: none;
        margin-bottom: 1rem;
        display: inline-flex;
    }

    .transport-modes {
        grid-template-columns: 1fr 1fr;
    }

    .warehouse-metrics {
        gap: 1.5rem;
    }

    .diagram-zone {
        padding: 2rem 1rem;
    }

    .flow-diagram {
        overflow-x: auto;
    }

    .hero-meta {
        gap: 0.75rem;
    }

    .main-content::before,
    .main-content::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .transport-modes {
        grid-template-columns: 1fr;
    }

    .hero-label {
        padding: 1.5rem;
    }

    .label-barcode {
        display: none;
    }
}