/* ==========================================================================
   Motion layer: page transitions, reveals, landing theatre, command palette.
   Everything degrades without JavaScript and honours reduced motion.
   ========================================================================== */

/* ---------- view transitions ---------- */
@view-transition {
    navigation: auto;
}

::view-transition-old(root) {
    animation: page-out 0.16s ease both;
}

::view-transition-new(root) {
    animation: page-in 0.26s var(--ease) both;
}

@keyframes page-out {
    to {
        opacity: 0;
        transform: translateY(-5px);
    }
}

@keyframes page-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
}

/* ---------- scroll reveals ---------- */
.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* ---------- reading progress ---------- */
.reading-progress {
    position: fixed;
    inset: 0 0 auto;
    height: 3px;
    z-index: 250;
    pointer-events: none;
}

.reading-progress span {
    display: block;
    width: 0;
    height: 100%;
    background: var(--accent);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 60%, transparent);
    transition: width 0.08s linear;
}

/* ---------- table of contents scroll spy ---------- */
.toc-item a.is-active {
    color: var(--accent);
    font-weight: 600;
}

.toc-item a.is-active::before {
    content: "▸";
    margin-right: 0.4rem;
    color: var(--accent);
}

/* ---------- micro-interactions ---------- */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0.65rem;
    right: 0.65rem;
    bottom: 0.15rem;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s var(--ease);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.post-card {
    position: relative;
}

.post-card::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
    background: radial-gradient(
        260px circle at var(--mx, 50%) var(--my, 0%),
        color-mix(in srgb, var(--accent) 12%, transparent),
        transparent 65%
    );
}

.post-card:hover::before {
    opacity: 1;
}

.post-card-content {
    position: relative;
    z-index: 1;
}

.button:active,
.button-ghost:active,
.page-link:active,
.viz-zoom:active {
    transform: translateY(1px) scale(0.99);
}

.chip {
    transition: transform 0.15s var(--ease), color 0.15s ease, border-color 0.15s ease;
}

.chip:hover {
    transform: translateY(-1px);
}

/* ---------- hero topology canvas ---------- */
.hero {
    position: relative;
}

.hero > :not(.hero-mesh) {
    position: relative;
    z-index: 1;
}

.hero-mesh {
    position: absolute;
    top: -12%;
    bottom: -12%;
    right: -6%;
    left: 28%;
    z-index: 0;
    width: auto;
    height: auto;
    pointer-events: none;
    opacity: 0.85;
    mask-image: linear-gradient(90deg, transparent 0%, #000 22%, #000 92%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 22%, #000 92%, transparent 100%);
}

[data-grug="true"] .hero-mesh {
    display: none;
}

/* ---------- control-plane extras ---------- */
.panel-badge {
    margin-left: auto;
    padding: 0.1rem 0.45rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text-faint);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.panel-badge.is-incident {
    color: var(--danger);
    border-color: var(--danger);
    animation: badge-pulse 1s ease-in-out infinite;
}

@keyframes badge-pulse {
    0%,
    100% {
        box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 25%, transparent);
    }
    50% {
        box-shadow: 0 0 0 5px transparent;
    }
}

/* ---------- complexity lab ---------- */
.complexity-lab {
    margin: clamp(3rem, 6vw, 4.5rem) 0 2rem;
}

.lab {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: clamp(1.25rem, 3vw, 2.25rem);
    align-items: stretch;
}

.lab-stage {
    position: relative;
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    min-height: 320px;
}

.lab-svg {
    display: block;
    width: 100%;
    height: auto;
}

.lab-node {
    fill: var(--bg-inset);
    stroke: var(--border-strong);
    stroke-width: 1.3;
}

.lab-node--muted {
    opacity: 0.55;
}

.lab-node--new {
    animation: lab-pop 0.32s var(--ease) both;
    transform-box: fill-box;
    transform-origin: center;
}

.lab-label {
    fill: var(--text);
    font-family: var(--font-mono);
    font-size: 11px;
    text-anchor: middle;
    dominant-baseline: central;
    pointer-events: none;
}

.lab-label--muted {
    fill: var(--text-faint);
}

.lab-edge {
    fill: none;
    stroke: var(--text-faint);
    stroke-width: 1.3;
    opacity: 0.45;
}

.lab-mesh {
    fill: none;
    stroke: var(--accent);
    stroke-width: 1.4;
    stroke-dasharray: 5 6;
    opacity: 0.5;
    animation: lab-rotate 26s linear infinite;
    transform-origin: 260px 150px;
}

.lab-queue {
    fill: var(--accent-2);
    opacity: 0.85;
}

.lab-ai {
    fill: var(--danger);
}

.lab-verdict {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    padding: 0.24rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.lab-verdict.is-fancy {
    color: var(--accent);
    border-color: var(--accent);
}

.lab-verdict.is-critical {
    color: var(--danger);
    border-color: var(--danger);
}

.lab-panel {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.lab-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
    margin: 0;
}

.lab-metrics div {
    padding: 0.75rem 0.9rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.lab-metrics dt {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.lab-metrics dd {
    margin: 0.25rem 0 0;
    font-family: var(--font-mono);
    font-size: 1.12rem;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.lab-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.lab-button {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    background: var(--bg-inset);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    cursor: pointer;
}

.lab-button:hover:not(:disabled) {
    color: var(--accent);
    border-color: var(--accent);
}

.lab-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.lab-button--reset {
    margin-left: auto;
    color: var(--text-faint);
}

.lab-log {
    min-height: 4.4rem;
    margin: 0;
    padding: 0.75rem 0.9rem;
    background: var(--bg-inset);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.71rem;
    line-height: 1.65;
    color: var(--text-muted);
    white-space: pre-line;
}

.lab-noscript {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-faint);
}

@keyframes lab-pop {
    from {
        opacity: 0;
        transform: scale(0.55);
    }
}

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

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

    .lab-metrics {
        grid-template-columns: 1fr 1fr;
    }

    .hero-mesh {
        display: none;
    }
}

[data-grug="true"] .complexity-lab {
    display: none;
}

@media (prefers-reduced-motion: reduce) {
    .lab-node--new,
    .lab-mesh {
        animation: none !important;
    }
}

/* ---------- command palette ---------- */
.command-palette {
    width: min(92vw, 650px);
    max-width: none;
    padding: 0;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    background: var(--bg-elevated);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}

.command-palette::backdrop {
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
}

.palette-box {
    display: flex;
    flex-direction: column;
    max-height: min(70vh, 560px);
}

.palette-input-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.95rem 1rem;
    border-bottom: 1px solid var(--border);
}

.palette-icon {
    color: var(--text-faint);
    flex: 0 0 auto;
}

#palette-input {
    flex: 1;
    min-width: 0;
    background: none;
    border: 0;
    outline: none;
    color: var(--text);
    font: inherit;
    font-size: 1rem;
}

kbd {
    font-family: var(--font-mono);
    font-size: 0.63rem;
    line-height: 1;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.16rem 0.32rem;
    color: var(--text-faint);
    background: var(--bg-inset);
}

.palette-results {
    overflow: auto;
    padding: 0.45rem;
}

.palette-group {
    padding: 0.5rem 0.65rem 0.3rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.palette-item {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 0.55rem 0.65rem;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    cursor: pointer;
}

.palette-item:hover,
.palette-item.is-selected {
    background: var(--accent-soft);
}

.palette-item-title {
    font-size: 0.92rem;
    font-weight: 600;
}

.palette-item-meta {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.72rem;
    color: var(--text-faint);
}

.palette-item kbd {
    margin-left: auto;
    flex: 0 0 auto;
}

.palette-empty {
    padding: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.palette-hint {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0.6rem 1rem;
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.64rem;
    color: var(--text-faint);
}

.palette-hint span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

/* ---------- footer controls / status ---------- */
.footer-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.75rem 0 1rem;
}

.footer-control {
    padding: 0.25rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
}

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

.footer-control--danger:hover {
    color: var(--danger);
    border-color: var(--danger);
}

.footer-control[aria-pressed="true"] {
    color: var(--accent);
    border-color: var(--accent);
}

.status-strip {
    margin: 1rem 0 0;
    padding-top: 0.85rem;
    border-top: 1px dashed var(--border);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
}

#status-strip-text::before {
    content: "●";
    margin-right: 0.5rem;
    color: var(--accent);
    animation: pulse 2.6s ease-in-out infinite;
}

/* ---------- toasts ---------- */
.toast-region {
    position: fixed;
    right: 1.2rem;
    bottom: 1.2rem;
    z-index: 300;
    display: grid;
    gap: 0.5rem;
    max-width: min(90vw, 340px);
}

.toast {
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--accent);
    border-radius: 8px;
    background: var(--bg-elevated);
    box-shadow: var(--shadow);
    color: var(--text);
    font-size: 0.84rem;
    animation: toast-in 0.24s var(--ease);
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
}

/* ---------- deploy easter egg ---------- */
.deploy-overlay {
    position: fixed;
    inset: 0;
    z-index: 400;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(4px);
}

.deploy-overlay[hidden] {
    display: none;
}

.deploy-card {
    position: relative;
    z-index: 1;
    width: min(92vw, 540px);
    padding: 1.5rem;
    border: 1px solid var(--danger);
    border-radius: 14px;
    background: var(--bg-elevated);
    box-shadow: var(--shadow-lg);
}

.deploy-card h2 {
    margin: 0.35rem 0 0.5rem;
}

.deploy-copy {
    margin: 0 0 0.9rem;
    color: var(--text-muted);
}

.deploy-log {
    min-height: 5.6rem;
    margin: 0;
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-inset);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    line-height: 1.7;
    white-space: pre-wrap;
}

.deploy-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 1rem;
}

.confetti {
    position: fixed;
    top: -12px;
    z-index: 399;
    width: 7px;
    height: 12px;
    pointer-events: none;
    animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
    to {
        transform: translateY(110vh) rotate(720deg);
        opacity: 0.2;
    }
}

/* ---------- 404 theatre ---------- */
.error-code {
    animation: error-glitch 4.2s steps(1) infinite;
}

@keyframes error-glitch {
    0%,
    91%,
    100% {
        transform: none;
        text-shadow: 3px 3px 0 var(--accent-soft);
    }
    92% {
        transform: translate(-2px, 1px);
        text-shadow: -3px 0 var(--danger), 3px 0 var(--accent);
    }
    94% {
        transform: translate(2px, -1px);
        text-shadow: 3px 0 var(--danger), -3px 0 var(--accent);
    }
    96% {
        transform: none;
    }
}

/* ---------- grug mode ---------- */
[data-grug="true"] body,
[data-grug="true"] button,
[data-grug="true"] input,
[data-grug="true"] .post-content {
    font-family: "Comic Sans MS", "Comic Sans", var(--font-body) !important;
}

[data-grug="true"] h1,
[data-grug="true"] h2,
[data-grug="true"] h3,
[data-grug="true"] .brand,
[data-grug="true"] .nav-link {
    font-family: "Comic Sans MS", "Comic Sans", var(--font-body) !important;
    letter-spacing: 0 !important;
    text-transform: none !important;
}

[data-grug="true"] .hero-mesh,
[data-grug="true"] .hero-panel,
[data-grug="true"] .buzz-strip,
[data-grug="true"] #calm-toggle {
    display: none !important;
}

[data-grug="true"] .hero {
    grid-template-columns: 1fr;
}

[data-grug="true"] .post-content {
    font-size: 1.25rem;
    line-height: 1.9;
}

[data-grug="true"] .site-header,
[data-grug="true"] .site-footer {
    border-style: dashed;
}

[data-grug="true"] .chip,
[data-grug="true"] .eyebrow,
[data-grug="true"] kbd {
    letter-spacing: 0 !important;
    text-transform: none !important;
}

/* ---------- calm mode ---------- */
[data-motion="calm"] *,
[data-motion="calm"] *::before,
[data-motion="calm"] *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
}

[data-motion="calm"] .hero-mesh {
    display: none;
}

[data-motion="calm"] .reveal {
    opacity: 1;
    transform: none;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    @view-transition {
        navigation: none;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-mesh,
    .panel-badge,
    .error-code,
    .confetti {
        animation: none !important;
    }
}

@media print {
    .reading-progress,
    .footer-controls,
    .status-strip,
    .command-palette,
    .toast-region,
    .deploy-overlay,
    .hero-mesh {
        display: none !important;
    }
}