/* ========================================
   sbom.study — Styles
   Mid-century meets circuit-board pastoralism
   ======================================== */

/* CSS Custom Properties */
:root {
    --bg-primary: #f4f0e8;
    --bg-secondary: #ebe6db;
    --text-primary: #2c2c2a;
    --text-secondary: #6b6b62;
    --accent-copper: #8b6f4e;
    --accent-sage: #5e7d5e;
    --highlight-amber: #c4a265;
    --glass-tint: rgba(94, 125, 94, 0.08);
    --glass-border: rgba(139, 111, 78, 0.15);
    --glass-bg: rgba(244, 240, 232, 0.65);
    --glass-shadow: rgba(44, 44, 42, 0.06);
    --glass-shadow-hover: rgba(44, 44, 42, 0.1);

    --font-headline: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    --gutter: clamp(1.5rem, 3vw, 3rem);
}

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

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
}

/* ========================================
   Magazine Container — Scroll Snap
   ======================================== */
.magazine-container {
    width: 100vw;
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    -webkit-overflow-scrolling: touch;
}

.spread {
    width: 100vw;
    height: 100vh;
    scroll-snap-align: start;
    position: relative;
    overflow: hidden;
}

.spread-inner {
    width: 100%;
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--gutter);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ========================================
   Spread Grid (2-column editorial)
   ======================================== */
.spread-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: calc(var(--gutter) * 2);
    align-items: center;
}

.spread-text-col {
    padding-right: var(--gutter);
}

.spread-card-col {
    display: flex;
    flex-direction: column;
    gap: clamp(1rem, 2vw, 1.5rem);
}

/* ========================================
   SPREAD 1 — Cover
   ======================================== */
.spread-cover {
    background-color: var(--bg-primary);
}

.spread-cover .spread-inner {
    align-items: center;
    justify-content: center;
}

.circuit-garden-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.06;
    z-index: 0;
    pointer-events: none;
}

.circuit-trace {
    fill: none;
    stroke: var(--accent-copper);
    stroke-linecap: round;
    stroke-linejoin: round;
}

.trace-primary {
    stroke-width: 2.5px;
}

.trace-secondary {
    stroke-width: 1.2px;
}

.trace-tertiary {
    stroke-width: 0.6px;
}

.circuit-node {
    fill: var(--accent-copper);
    animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.cover-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cover-title {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(4rem, 10vw, 8rem);
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
    overflow: hidden;
}

.cover-title .letter {
    display: inline-block;
    transform: translateY(120%);
    opacity: 0;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.cover-title .letter.visible {
    transform: translateY(0);
    opacity: 1;
}

.cover-title .letter.dot {
    color: var(--accent-copper);
}

.cover-subtitle {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(0.8rem, 1.1vw, 1rem);
    color: var(--text-secondary);
    letter-spacing: 0.06em;
    margin-top: 1.5rem;
    min-height: 1.5em;
    display: inline-block;
}

.typewriter-cursor,
.cover-subtitle::after {
    display: inline-block;
    width: 2px;
    height: 1em;
    background-color: var(--accent-copper);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 530ms step-end infinite;
}

.cover-subtitle.typing::after {
    content: '';
}

.cover-subtitle.done::after {
    content: '';
    animation: blink 530ms step-end infinite;
}

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

/* ========================================
   SPREAD 2 — Definition
   ======================================== */
.spread-definition {
    background-color: var(--bg-secondary);
}

.section-headline {
    font-family: var(--font-headline);
    font-weight: 600;
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--text-primary);
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    line-height: 1.15;
    overflow: hidden;
}

.section-headline .letter {
    display: inline-block;
    transform: translateY(120%);
    opacity: 0;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.section-headline .letter.visible {
    transform: translateY(0);
    opacity: 1;
}

.body-text {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.body-text.visible {
    opacity: 1;
    transform: translateY(0);
}

.body-text p {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.2vw, 1.25rem);
    line-height: 1.72;
    max-width: 38em;
    color: var(--text-primary);
    margin-bottom: 1.2em;
}

.body-text p:last-child {
    margin-bottom: 0;
}

/* Specimen Cards */
.specimen-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(1.1);
    -webkit-backdrop-filter: blur(16px) saturate(1.1);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: clamp(1.2rem, 2vw, 1.8rem);
    box-shadow: 0 8px 32px var(--glass-shadow);
    transform: rotate(var(--card-rotate, 0deg)) translateX(40px);
    opacity: 0;
    transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.5s ease,
                box-shadow 0.3s ease,
                backdrop-filter 0.3s ease;
    position: relative;
}

.specimen-card.visible {
    transform: rotate(var(--card-rotate, 0deg)) translateX(0);
    opacity: 1;
}

.specimen-card:hover {
    box-shadow: 0 12px 40px var(--glass-shadow-hover);
    backdrop-filter: blur(24px) saturate(1.1);
    -webkit-backdrop-filter: blur(24px) saturate(1.1);
}

.specimen-node {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-copper);
    animation: pulse 2.5s ease-in-out infinite;
}

.specimen-name {
    font-family: var(--font-headline);
    font-weight: 600;
    font-size: clamp(1.2rem, 1.8vw, 1.6rem);
    color: var(--text-primary);
    margin-bottom: 0.4em;
}

.specimen-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.8em;
}

.specimen-version,
.specimen-license {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(0.7rem, 0.9vw, 0.85rem);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #5e6b5c;
}

.specimen-desc {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.85rem, 1vw, 0.95rem);
    line-height: 1.6;
    color: var(--text-secondary);
}

/* ========================================
   SPREAD 3 — Dependency Tree
   ======================================== */
.spread-tree {
    background-color: var(--bg-primary);
}

.tree-headline {
    position: absolute;
    top: var(--gutter);
    left: var(--gutter);
    z-index: 2;
}

.tree-container {
    position: relative;
    width: 100%;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dependency-tree {
    width: 100%;
    height: 100%;
    max-width: 1100px;
}

.tree-trace {
    fill: none;
    stroke: var(--accent-copper);
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: var(--trace-length, 500);
    stroke-dashoffset: var(--trace-length, 500);
    transition: stroke-dashoffset 1.5s ease;
}

.tree-trace.drawn {
    stroke-dashoffset: 0;
}

.trace-l0 { stroke-width: 2.5px; }
.trace-l1 { stroke-width: 2px; }
.trace-l2 { stroke-width: 1.4px; }
.trace-l3 { stroke-width: 0.8px; }

.tree-node {
    fill: var(--accent-copper);
    transform: scale(0);
    transform-origin: center;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tree-node.visible {
    transform: scale(1);
}

.node-root { fill: var(--accent-sage); }

/* Tree labels */
.tree-labels {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.tree-label {
    position: absolute;
    left: var(--lx);
    top: var(--ly);
    transform: translate(-50%, -50%);
    background: var(--glass-bg);
    backdrop-filter: blur(12px) saturate(1.1);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.4rem 0.7rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: auto;
    white-space: nowrap;
}

.tree-label.visible {
    opacity: 1;
}

.label-name {
    font-family: var(--font-headline);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.label-ver {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #5e6b5c;
}

.label-root .label-name {
    color: var(--accent-sage);
    font-size: 1rem;
}

/* ========================================
   SPREAD 4 — Argument
   ======================================== */
.spread-argument {
    background-color: var(--bg-secondary);
}

.pull-quote {
    margin: 0;
    padding: 0;
}

.pull-quote p {
    font-family: var(--font-headline);
    font-style: italic;
    font-weight: 500;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    line-height: 1.35;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.pull-quote .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    margin-right: 0.25em;
}

.pull-quote .word.visible {
    opacity: 1;
    transform: translateY(0);
}

.argument-col {
    overflow-y: auto;
    max-height: 85vh;
    padding-right: 0.5rem;
}

.argument-col .body-text p {
    font-size: clamp(0.95rem, 1.1vw, 1.1rem);
}

/* Callout Cards */
.callout-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(1.1);
    -webkit-backdrop-filter: blur(16px) saturate(1.1);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: clamp(1rem, 1.8vw, 1.5rem);
    box-shadow: 0 8px 32px var(--glass-shadow);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.5s ease;
}

.callout-card.visible {
    transform: translateY(0);
    opacity: 1;
}

.callout-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.9rem, 1vw, 1rem);
    line-height: 1.65;
    color: var(--text-secondary);
}

/* ========================================
   SPREAD 5 — Coda
   ======================================== */
.spread-coda {
    background-color: var(--bg-primary);
}

.circuit-garden-coda {
    opacity: 0.15;
}

.spread-coda .spread-inner {
    align-items: center;
    justify-content: center;
}

.coda-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.coda-text {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(0.9rem, 1.2vw, 1.1rem);
    color: var(--text-secondary);
    letter-spacing: 0.04em;
    line-height: 1.6;
    min-height: 1.6em;
    display: inline;
}

#coda-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background-color: var(--accent-copper);
    vertical-align: text-bottom;
    margin-left: 2px;
    opacity: 0;
}

#coda-cursor.active {
    opacity: 1;
    animation: blink 530ms step-end infinite;
}

/* ========================================
   Dot Navigation
   ======================================== */
.dot-nav {
    position: fixed;
    right: clamp(1rem, 2vw, 2rem);
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.dot-trace {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--accent-copper);
    opacity: 0.25;
    z-index: 0;
}

.dot-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px 6px;
    position: relative;
    z-index: 1;
}

.dot-circle {
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-copper);
    opacity: 0.4;
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease;
}

.dot-btn.active .dot-circle {
    opacity: 1;
    transform: scale(1.3);
    background-color: var(--highlight-amber);
    animation: pulse 2.5s ease-in-out infinite;
}

.dot-btn:hover .dot-circle {
    opacity: 0.8;
    transform: scale(1.15);
}

/* ========================================
   Geometric Accents
   ======================================== */
.geo-accent {
    position: fixed;
    pointer-events: none;
    z-index: 0;
}

.geo-circle {
    width: clamp(200px, 30vw, 400px);
    height: clamp(200px, 30vw, 400px);
    border-radius: 50%;
    border: 1px solid var(--accent-sage);
    opacity: 0.12;
    top: 15%;
    left: -5%;
}

.geo-starburst {
    width: clamp(80px, 12vw, 160px);
    height: clamp(80px, 12vw, 160px);
    opacity: 0.15;
    bottom: 10%;
    right: 8%;
    background: radial-gradient(circle, transparent 30%, transparent 30%),
                conic-gradient(from 0deg, var(--accent-sage) 0deg 2deg, transparent 2deg 45deg,
                               var(--accent-sage) 45deg 47deg, transparent 47deg 90deg,
                               var(--accent-sage) 90deg 92deg, transparent 92deg 135deg,
                               var(--accent-sage) 135deg 137deg, transparent 137deg 180deg,
                               var(--accent-sage) 180deg 182deg, transparent 182deg 225deg,
                               var(--accent-sage) 225deg 227deg, transparent 227deg 270deg,
                               var(--accent-sage) 270deg 272deg, transparent 272deg 315deg,
                               var(--accent-sage) 315deg 317deg, transparent 317deg 360deg);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 900px) {
    .spread-grid {
        grid-template-columns: 1fr;
        gap: var(--gutter);
    }

    .spread-text-col {
        padding-right: 0;
    }

    .spread-card-col {
        max-height: 40vh;
        overflow-y: auto;
    }

    .argument-col {
        max-height: 50vh;
    }

    .tree-labels {
        display: none;
    }

    .tree-container {
        height: 60vh;
    }

    .dot-nav {
        right: 0.5rem;
    }
}

@media (max-width: 600px) {
    .cover-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .pull-quote p {
        font-size: clamp(1.4rem, 5vw, 2rem);
    }

    .section-headline {
        font-size: clamp(1.6rem, 6vw, 2.5rem);
    }
}

/* ========================================
   Stroke-dasharray animation prep
   ======================================== */
.circuit-trace {
    stroke-dasharray: 1000;
    stroke-dashoffset: 0;
}