/* ============================================
   PLAYGROUND PAGE — STYLES
   Neobrutalist theme, consistent with main site
   ============================================ */

/* Hero */
.neo-formulas-hero {
    padding: var(--neo-space-xxxl) 0 var(--neo-space-xl);
    background-color: var(--neo-white);
    border-bottom: var(--neo-border-width) solid var(--neo-border-color);
}

/* Card base */
.neo-formula-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    background-color: var(--neo-white);
    border: var(--neo-border-width) solid var(--neo-border-color);
    box-shadow: var(--neo-shadow-offset) var(--neo-shadow-offset) 0 var(--neo-shadow-color);
    transition: var(--neo-transition-normal);
    text-decoration: none;
    color: var(--neo-black);
}

.neo-formula-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: rgb(var(--neo-fx-canvas-bg-rgb));
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: opacity 220ms ease;
}

:root[data-theme="dark"] .neo-formula-card:hover::before,
:root[data-theme="dark"] .neo-formula-card.fx-force-active::before {
    opacity: 1;
}

.neo-formula-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: calc(var(--neo-shadow-offset) + 3px) calc(var(--neo-shadow-offset) + 3px) 0 var(--neo-shadow-color);
    color: var(--neo-black);
    text-decoration: none;
}

/* Card body */
.neo-formula-card-body {
    position: relative;
    z-index: 3;
    padding: var(--neo-space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.neo-formula-icon {
    font-size: 2rem;
    margin-bottom: var(--neo-space-md);
    color: var(--neo-primary);
}

.neo-formula-title {
    font-family: var(--neo-font-display);
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--neo-space-sm);
}

.neo-formula-year {
    font-family: var(--neo-font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--neo-gray-600);
    margin-bottom: var(--neo-space-lg);
}

.neo-formula-action {
    font-family: var(--neo-font-primary);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--neo-primary);
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: var(--neo-space-sm);
    transition: var(--neo-transition-fast);
}

.neo-formula-card:hover .neo-formula-action {
    gap: var(--neo-space-md);
}

/* Card footer */
.neo-formula-footer {
    position: relative;
    z-index: 3;
    padding: var(--neo-space-sm) var(--neo-space-xl);
    border-top: 2px solid var(--neo-border-color);
    font-family: var(--neo-font-mono);
    font-size: 0.72rem;
    color: var(--neo-gray-500);
    background-color: var(--neo-gray-100);
}

/* ============================================
   FX CARD LAYERS — adapted for neo theme
   ============================================ */



/* FX cards: canvas layer */
.fx-card .fx-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background-color: rgb(var(--neo-fx-canvas-bg-rgb));
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 240ms ease;
}

.fx-card:hover .fx-canvas {
    opacity: 1;
}

/* Force hover state if .fx-force-active is applied */
.fx-card.fx-force-active .fx-canvas,
.fx-card.fx-force-active .fx-terminal {
    opacity: 1 !important;
}

/* FX Trigger Button (Mobile/Tablet) */
.neo-fx-btn {
    position: absolute;
    top: var(--neo-space-md);
    right: var(--neo-space-md);
    z-index: 10;
    background: var(--neo-white);
    border: 2px solid var(--neo-border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neo-black);
    box-shadow: 2px 2px 0 var(--neo-shadow-color);
    cursor: pointer;
    transition: var(--neo-transition-fast);
}

.neo-fx-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0 0 0 var(--neo-shadow-color);
}

@media (pointer: fine) {
    .neo-fx-btn {
        display: none; /* Hide on devices with a mouse */
    }
}


/* Ensure body/footer stay on top of effects */
.fx-card .neo-formula-card-body,
.fx-card .neo-formula-footer {
    position: relative;
    z-index: 3;
}

/* Computer Science terminal effect */
.fx-card .fx-terminal {
    position: absolute;
    inset: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    pointer-events: none;
    z-index: 2;
    border: 0;
    box-shadow: none;
    background: rgb(var(--neo-fx-canvas-bg-rgb));
    color: var(--neo-fx-terminal-text);
    opacity: 0;
    transition: opacity 220ms ease;
}

.fx-card[data-fx="terminal-cli"]:hover .fx-terminal {
    opacity: 1;
}

.fx-terminal-header {
    display: flex;
    align-items: center;
    gap: 7px;
    height: 31px;
    padding: 0 12px;
    border-bottom: 1px solid rgba(var(--neo-overlay-rgb), 0.15);
    background: var(--neo-fx-terminal-header-bg);
    color: var(--neo-fx-terminal-header-text);
    font-family: var(--neo-font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.02em;
}

.fx-terminal-dot {
    width: 9px;
    height: 9px;
    border-radius: 999px;
    display: inline-block;
}

.fx-terminal-dot-red {
    background: #ff5f56;
}

.fx-terminal-dot-yellow {
    background: #ffbd2e;
}

.fx-terminal-dot-green {
    background: #27c93f;
}

.fx-terminal-title {
    margin-left: auto;
    opacity: 0.88;
}

.fx-terminal-body {
    flex: 1;
    overflow: hidden;
    padding: 8px 12px;
    font-family: var(--neo-font-mono);
    font-size: 0.72rem;
    line-height: 1.45;
}

.fx-terminal-lines {
    display: flex;
    flex-direction: column;
    gap: 2px;
    white-space: pre;
}

.fx-terminal-line {
    color: var(--neo-fx-terminal-text);
}

.fx-terminal-line-echo {
    color: var(--neo-fx-terminal-line-echo);
}

.fx-terminal-line-accent {
    color: var(--neo-fx-terminal-line-accent);
}

/* Keep card content clear of the terminal title bar on CS card */
.fx-card[data-fx="terminal-cli"] .neo-formula-card-body {
    padding-top: calc(var(--neo-space-xl) + 24px);
}

.fx-card[data-fx="terminal-cli"] .neo-formula-card-body {
    transition: opacity 220ms ease;
}

.fx-card[data-fx="terminal-cli"]:hover .neo-formula-card-body,
.fx-card[data-fx="terminal-cli"].fx-force-active .neo-formula-card-body {
    opacity: 0.1;
}

/* ============================================
   FORMULA PDF MODAL
   ============================================ */

.neo-formula-modal-content {
    max-width: min(1280px, 96vw);
}

.neo-formula-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--neo-space-lg);
}

.neo-formula-modal-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--neo-space-sm);
    margin-top: var(--neo-space-sm);
    padding-right: 64px;
}

.neo-formula-modal-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--neo-space-sm);
    font-family: var(--neo-font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.55rem 0.75rem;
    border: 2px solid var(--neo-border-color);
    background-color: var(--neo-white);
    color: var(--neo-black);
    box-shadow: 3px 3px 0 var(--neo-shadow-color);
    text-decoration: none;
    cursor: pointer;
    transition: var(--neo-transition-fast);
}

.neo-formula-modal-btn:hover {
    background-color: var(--neo-accent);
    color: var(--neo-black);
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 var(--neo-shadow-color);
    text-decoration: none;
}

.neo-formula-modal-btn-toggle.is-active {
    background-color: var(--neo-inverse-surface);
    color: var(--neo-on-inverse);
}

.neo-formula-modal-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--neo-accent), 3px 3px 0 var(--neo-shadow-color);
}

.neo-formula-modal-body {
    padding: 0;
    background-color: var(--neo-gray-200);
    min-height: 60vh;
}

.neo-formula-modal-body iframe {
    width: 100%;
    height: min(78vh, calc(100vh - 260px));
    min-height: 440px;
    border: none;
    display: block;
    background-color: var(--neo-fx-pdf-surface);
    transition: filter var(--neo-transition-fast);
}

.neo-formula-modal-body.is-inverted iframe {
    filter: invert(1) hue-rotate(180deg) contrast(0.95);
}

@media (max-width: 992px) {
    .neo-formula-modal-header {
        flex-direction: column;
    }

    .neo-formula-modal-actions {
        width: 100%;
        justify-content: flex-start;
        padding-right: 0;
    }

    .neo-formula-modal-body iframe {
        height: 68vh;
        min-height: 420px;
    }
}

@media (max-width: 576px) {
    .neo-formula-modal-content {
        max-width: 100%;
    }

    .neo-formula-modal-body iframe {
        height: 62vh;
        min-height: 320px;
    }
}

/* ============================================
   PLAYGROUND EXHIBIT MODAL ("plaque")
   ============================================ */

.neo-exhibit-modal-content {
    max-width: min(760px, 94vw);
}

.neo-exhibit-modal-header {
    padding-right: 64px; /* clear the close button */
}

.neo-exhibit-body {
    display: block;          /* override base .neo-modal-body flex centering */
    text-align: left;
    padding: var(--neo-space-xl);
    background-color: var(--neo-white);
}

/* Live effect preview at the top of the plaque */
.neo-exhibit-preview-slot {
    margin-bottom: var(--neo-space-xl);
}

.neo-exhibit-preview {
    position: relative;
    height: 240px;
    overflow: hidden;
    isolation: isolate;
    border: 2px solid var(--neo-border-color);
    box-shadow: 4px 4px 0 var(--neo-shadow-color);
    background-color: rgb(var(--neo-fx-canvas-bg-rgb));
}

@media (max-width: 576px) {
    .neo-exhibit-preview {
        height: 180px;
    }
}

.neo-exhibit-tagline {
    font-family: var(--neo-font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--neo-primary);
    margin-bottom: var(--neo-space-lg);
}

.neo-exhibit-subhead {
    font-family: var(--neo-font-display);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--neo-gray-600);
    margin: var(--neo-space-lg) 0 var(--neo-space-sm);
}

.neo-exhibit-text {
    font-family: var(--neo-font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--neo-black);
    margin-bottom: var(--neo-space-md);
}

.neo-exhibit-code {
    margin: var(--neo-space-sm) 0 var(--neo-space-lg);
    padding: var(--neo-space-lg);
    background-color: var(--neo-gray-100);
    border: 2px solid var(--neo-border-color);
    box-shadow: 3px 3px 0 var(--neo-shadow-color);
    overflow-x: auto;
    font-family: var(--neo-font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--neo-black);
    white-space: pre;
}

.neo-exhibit-code code {
    font-family: inherit;
    color: inherit;
    background: none;
    padding: 0;
    white-space: pre;
}

.neo-exhibit-source {
    margin-top: var(--neo-space-sm);
}