/* === RESET & BASE === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --sand-light: #e8e0d4;
    --sand-mid: #d1c7b8;
    --sand-dark: #c4b9a8;
    --deep-slate: #1e2a2e;
    --trace-teal: #4a9e8e;
    --muted-steel: #7a8b8f;
    --ocean-dark: #2d7a8a;
    --slate-mid: #2b3a42;
    --amber-accent: #c49a3c;
    --dot-color: rgba(74, 158, 142, 0.15);
    --block-bg: rgba(232, 224, 212, 0.55);
    --block-border: rgba(74, 158, 142, 0.25);
    --block-hover-border: rgba(74, 158, 142, 0.6);
}

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

body.substrate {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: clamp(0.875rem, 1.2vw, 1rem);
    line-height: 1.75;
    letter-spacing: 0.02em;
    color: var(--deep-slate);
    background-color: var(--sand-light);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* === DOT GRID CANVAS === */
.dot-grid-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* === TRACE SVG OVERLAY === */
.trace-svg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* === HEADER === */
.trace-header {
    position: relative;
    z-index: 10;
    padding: 3rem 4rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.site-name {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    letter-spacing: 0.08em;
    text-transform: lowercase;
    color: var(--deep-slate);
}

.site-tagline {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: clamp(0.75rem, 1vw, 0.875rem);
    letter-spacing: 0.06em;
    text-transform: lowercase;
    color: var(--muted-steel);
}

.header-trace {
    margin-top: 1rem;
    height: 1px;
    background: linear-gradient(90deg, var(--trace-teal) 0%, transparent 80%);
    opacity: 0.4;
}

/* === MASONRY FIELD === */
.masonry-field {
    position: relative;
    z-index: 5;
    padding: 2rem 4rem 4rem;
    columns: 3;
    column-gap: 2rem;
}

/* === MORE BLOCK === */
.more-block {
    break-inside: avoid;
    background: var(--block-bg);
    border: 1px solid var(--block-border);
    border-radius: 2px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    position: relative;
    transition: border-color 0.6s ease, box-shadow 0.6s ease, transform 0.4s ease;
    backdrop-filter: blur(4px);
    opacity: 0;
    transform: translateY(20px);
    animation: blockReveal 0.8s ease forwards;
}

.more-block:nth-child(1) { animation-delay: 0.1s; }
.more-block:nth-child(2) { animation-delay: 0.2s; }
.more-block:nth-child(3) { animation-delay: 0.3s; }
.more-block:nth-child(4) { animation-delay: 0.4s; }
.more-block:nth-child(5) { animation-delay: 0.5s; }
.more-block:nth-child(6) { animation-delay: 0.6s; }
.more-block:nth-child(7) { animation-delay: 0.7s; }
.more-block:nth-child(8) { animation-delay: 0.8s; }
.more-block:nth-child(9) { animation-delay: 0.9s; }
.more-block:nth-child(10) { animation-delay: 1.0s; }
.more-block:nth-child(11) { animation-delay: 1.1s; }
.more-block:nth-child(12) { animation-delay: 1.2s; }

@keyframes blockReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.more-block:hover {
    border-color: var(--block-hover-border);
    box-shadow: 0 0 20px rgba(74, 158, 142, 0.08);
    transform: translateY(-2px);
}

.more-block::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 1rem;
    width: 2rem;
    height: 1px;
    background: var(--trace-teal);
    opacity: 0;
    transition: opacity 0.6s ease, width 0.6s ease;
}

.more-block:hover::before {
    opacity: 0.6;
    width: 3rem;
}

/* Block header */
.block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.iso-icon {
    opacity: 0.85;
    transition: opacity 0.4s ease;
}

.more-block:hover .iso-icon {
    opacity: 1;
}

.block-id {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--muted-steel);
    text-transform: uppercase;
}

/* Block title */
.block-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    letter-spacing: 0.03em;
    color: var(--deep-slate);
    margin-bottom: 0.75rem;
}

/* Block body */
.block-body {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: clamp(0.8rem, 1vw, 0.9rem);
    line-height: 1.8;
    color: var(--deep-slate);
    opacity: 0.85;
}

/* Block trace out */
.block-trace-out {
    margin-top: 1.25rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--trace-teal) 50%, transparent);
    opacity: 0.2;
    transition: opacity 0.6s ease;
}

.more-block:hover .block-trace-out {
    opacity: 0.5;
}

/* === FOOTER === */
.trace-footer {
    position: relative;
    z-index: 10;
    padding: 2rem 4rem 3rem;
}

.footer-trace {
    height: 1px;
    background: linear-gradient(90deg, transparent 20%, var(--trace-teal) 100%);
    opacity: 0.3;
    margin-bottom: 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-label {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--muted-steel);
    text-transform: lowercase;
}

.footer-note {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--sand-dark);
    text-transform: lowercase;
}

/* === AMBIENT PULSE ON HOVER === */
.more-block.pulse {
    animation: ambientPulse 3s ease-in-out infinite;
}

@keyframes ambientPulse {
    0%, 100% { box-shadow: 0 0 0 rgba(74, 158, 142, 0); }
    50% { box-shadow: 0 0 30px rgba(74, 158, 142, 0.06); }
}

/* === RESPONSIVE === */
@media (max-width: 1200px) {
    .masonry-field {
        columns: 2;
        padding: 2rem 3rem 3rem;
    }
    .trace-header,
    .trace-footer {
        padding-left: 3rem;
        padding-right: 3rem;
    }
}

@media (max-width: 768px) {
    .masonry-field {
        columns: 1;
        padding: 1.5rem 1.5rem 2rem;
    }
    .trace-header,
    .trace-footer {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    .site-name {
        font-size: 1.5rem;
    }
}

/* === SCROLL REVEAL OVERRIDE === */
.more-block.visible {
    opacity: 1;
    transform: translateY(0);
}