/* ============================================
   FORMULA BOOKLETS 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: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: 2;
    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: 2;
    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%;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: opacity 240ms ease;
}

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

/* Suppress pseudo-element glow on canvas-based effects */
.fx-card[data-fx="vector-field"]::before,
.fx-card[data-fx="vector-field"]::after,
.fx-card[data-fx="molecules"]::before,
.fx-card[data-fx="molecules"]::after,
.fx-card[data-fx="math-symbols"]::before,
.fx-card[data-fx="math-symbols"]::after,
.fx-card[data-fx="lorenz-attractor"]::before,
.fx-card[data-fx="lorenz-attractor"]::after {
    display: none;
}

/* Ensure body/footer stay on top of effects */
.fx-card .neo-formula-card-body,
.fx-card .neo-formula-footer {
    position: relative;
    z-index: 2;
}

/* Computer Science terminal effect */
.fx-card .fx-terminal {
    position: absolute;
    inset: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    pointer-events: none;
    z-index: 1;
    border: 0;
    box-shadow: none;
    background: transparent;
    color: #1e6d4f;
    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(26, 26, 26, 0.15);
    background: #e9eef5;
    color: #3b485a;
    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: #1e6d4f;
}

.fx-terminal-line-echo {
    color: #4d5b6f;
}

.fx-terminal-line-accent {
    color: #236fcd;
}

/* 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 {
    opacity: 0.1;
}