/* ==========================================================================
   NFL OT 4th Down Decision Engine — Minimal Black + Mono
   ========================================================================== */

:root {
    --bg: #000000;
    --card-bg: #0a0a0a;
    --accent: #ffffff;
    --accent-dim: #cccccc;
    --success: #00ff88;
    --gold: #e0e0e0;
    --danger: #ff4444;
    --text: #ffffff;
    --muted: #999999;
    --border: #1a1a1a;
    --input-bg: #0d0d0d;
    --hover: #141414;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Header / Hero */
.header {
    position: relative;
    text-align: center;
    padding: 3rem 1.5rem 2.5rem;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

/* Football field background */
.hero-field {
    position: absolute;
    inset: 0;
    opacity: 0.07;
    pointer-events: none;
}

.hero-yard-line {
    position: absolute;
    top: 15%;
    bottom: 15%;
    width: 1px;
    background: var(--text);
}

.hero-yard-line.hero-midfield {
    width: 2px;
    opacity: 0.6;
}

.hero-hash-top,
.hero-hash-bottom {
    position: absolute;
    left: 10%;
    right: 10%;
    height: 1px;
    background: repeating-linear-gradient(
        90deg,
        var(--text) 0px,
        var(--text) 8px,
        transparent 8px,
        transparent 24px
    );
}

.hero-hash-top { top: 30%; }
.hero-hash-bottom { bottom: 30%; }

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

.header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.header h1 span {
    color: var(--success);
}

.header .subtitle {
    color: var(--muted);
    font-size: 0.7rem;
    margin-top: 0.35rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-credits {
    color: var(--muted);
    font-size: 0.68rem;
    line-height: 1.6;
    max-width: 580px;
    margin: 0.75rem auto 1.75rem;
}

/* Decision Zone Map */
.hero-zone-map {
    max-width: 600px;
    margin: 0 auto;
}

.zone-map-label {
    font-size: 0.6rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}

.zone-map-bar {
    display: flex;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.zone {
    display: flex;
    align-items: center;
    justify-content: center;
}

.zone-text {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.zone-go {
    background: rgba(0, 255, 136, 0.12);
    color: var(--success);
    border-right: 1px solid var(--border);
}

.zone-fg {
    background: rgba(255, 204, 0, 0.1);
    color: #ffcc00;
    border-right: 1px solid var(--border);
}

.zone-punt {
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
}

.zone-map-axis {
    display: flex;
    justify-content: space-between;
    margin-top: 0.3rem;
    font-size: 0.5rem;
    color: var(--muted);
    opacity: 0.5;
}

.zone-map-note {
    font-size: 0.58rem;
    color: var(--muted);
    opacity: 0.4;
    margin-top: 0.6rem;
    line-height: 1.5;
}

/* Main Layout */
.main-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2rem;
    align-items: start;
}

/* Input Panel */
.input-panel {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    position: sticky;
    top: 1rem;
}

.input-panel h2 {
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-group label .label-detail {
    text-transform: none;
    font-weight: 400;
    letter-spacing: 0;
    font-size: 0.65rem;
    opacity: 0.5;
}

.form-group .hint {
    font-size: 0.65rem;
    color: var(--muted);
    opacity: 0.4;
    margin-top: 0.25rem;
}

/* Yard line slider */
.slider-container {
    position: relative;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 2px;
    border-radius: 0;
    background: var(--border);
    outline: none;
    margin: 0.75rem 0 0.5rem;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.15);
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text);
    cursor: pointer;
    border: none;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.55rem;
    color: var(--muted);
    opacity: 0.5;
    margin-top: 0;
}

.yard-display {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 0.5rem;
    min-height: 1.5em;
}

/* Field visualization */
.field-viz-inline {
    margin-top: 0.5rem;
}

.field-container {
    position: relative;
    height: 32px;
    background: linear-gradient(90deg,
        #0d1f12 0%, #0d1f12 10%,
        #112816 10%, #112816 20%,
        #0d1f12 20%, #0d1f12 30%,
        #112816 30%, #112816 40%,
        #0d1f12 40%, #0d1f12 50%,
        #112816 50%, #112816 60%,
        #0d1f12 60%, #0d1f12 70%,
        #112816 70%, #112816 80%,
        #0d1f12 80%, #0d1f12 90%,
        #112816 90%, #112816 100%
    );
    border-radius: 4px;
    border: 1px solid #1a2e1e;
    overflow: hidden;
}

.field-marker {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--text);
    transition: left 0.3s ease;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
}

.field-marker::after {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--text);
}

.field-labels {
    display: flex;
    justify-content: space-between;
    padding: 0.15rem 0 0;
    font-size: 0.5rem;
    color: var(--muted);
    opacity: 0.4;
}

.field-labels span {
    width: 20%;
    text-align: center;
}

.field-endzone-left,
.field-endzone-right {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.4rem;
    font-weight: 700;
    color: rgba(255,255,255,0.15);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.field-endzone-left {
    left: 0;
    background: rgba(255, 0, 0, 0.06);
    border-right: 1px solid #1a2e1e;
}

.field-endzone-right {
    right: 0;
    background: rgba(255, 255, 255, 0.03);
    border-left: 1px solid #1a2e1e;
}

/* Inputs */
select,
input[type="number"] {
    width: 100%;
    padding: 0.55rem 0.7rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: inherit;
    font-size: 0.8rem;
    outline: none;
    transition: border-color 0.2s;
}

select:focus,
input[type="number"]:focus {
    border-color: #333;
}

select option {
    background: var(--card-bg);
}

/* Radio buttons */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.radio-btn {
    position: relative;
}

.radio-btn input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-btn label {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--muted);
    text-transform: none;
    letter-spacing: 0;
    transition: all 0.15s;
}

.radio-btn input:checked + label {
    background: var(--text);
    border-color: var(--text);
    color: #000;
    font-weight: 600;
}

.radio-btn label:hover {
    border-color: #333;
    color: var(--accent-dim);
}

/* Opponent result */
.opponent-result {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
    margin-bottom: 0;
}

.opponent-result.visible {
    max-height: 120px;
    opacity: 1;
    margin-bottom: 1.25rem;
}

/* Advanced settings */
.advanced-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--muted);
    font-size: 0.7rem;
    margin-bottom: 0.75rem;
    user-select: none;
}

.advanced-toggle:hover {
    color: var(--accent-dim);
}

.advanced-toggle .arrow {
    transition: transform 0.2s;
    font-size: 0.55rem;
}

.advanced-toggle.open .arrow {
    transform: rotate(90deg);
}

.advanced-settings {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

.advanced-settings.visible {
    max-height: 600px;
    opacity: 1;
}

.advanced-note {
    font-size: 0.65rem;
    color: var(--muted);
    opacity: 0.5;
    margin-bottom: 1rem;
    line-height: 1.5;
    padding: 0.5rem 0.75rem;
    border-left: 2px solid #222;
}

.advanced-section-label {
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
    margin-top: 0.75rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--border);
}

.advanced-settings .form-group {
    margin-bottom: 0.75rem;
}

.advanced-settings label {
    font-size: 0.65rem;
}

.advanced-settings input[type="number"] {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
}

/* Analyze button */
.analyze-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--text);
    color: #000;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: all 0.15s;
    margin-top: 0.75rem;
}

.analyze-btn:hover {
    opacity: 0.85;
}

.analyze-btn:active {
    opacity: 0.7;
}

.analyze-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Results Panel */
.results-panel {
    min-height: 300px;
}

.results-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--muted);
    text-align: center;
    gap: 1rem;
}

.results-placeholder .icon {
    font-size: 2.5rem;
    opacity: 0.15;
}

.results-placeholder p {
    font-size: 0.75rem;
    max-width: 280px;
    line-height: 1.6;
}

/* Loading */
.loading {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    gap: 1.5rem;
}

.loading.active {
    display: flex;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-top-color: var(--text);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading p {
    color: var(--muted);
    font-size: 0.75rem;
}

/* Result Cards */
.results-content {
    display: none;
}

.results-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.cards-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.decision-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.decision-card.recommended {
    border-color: var(--success);
    background: rgba(0, 255, 136, 0.03);
}

.recommended-badge {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background: var(--success);
    color: #000;
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    padding: 0.2rem;
    text-transform: uppercase;
}

.decision-card.recommended .recommended-badge {
    display: block;
}

.decision-card .card-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-top: 0.4rem;
    margin-bottom: 0.75rem;
}

.decision-card.recommended .card-title {
    color: var(--success);
}

.decision-card .win-prob {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.decision-card.recommended .win-prob {
    color: var(--success);
}

.decision-card.unavailable {
    opacity: 0.25;
    pointer-events: none;
}

.decision-card.unavailable .win-prob {
    font-size: 1.2rem;
    color: var(--muted);
}

.decision-card .win-label {
    font-size: 0.6rem;
    color: var(--muted);
    margin-top: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Card icons */
.card-icon {
    font-size: 1.25rem;
    margin-top: 0.25rem;
    opacity: 0.6;
}

.decision-card.recommended .card-icon {
    opacity: 1;
}

/* Strength & Details */
.result-meta {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
}

.strength-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.strength-label {
    font-size: 0.7rem;
    color: var(--muted);
}

.strength-value {
    font-weight: 600;
    font-size: 0.8rem;
}

.strength-value.strong {
    color: var(--success);
}

.strength-value.moderate {
    color: #ffcc00;
}

.strength-value.marginal {
    color: var(--danger);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.detail-item {
    text-align: center;
}

.detail-item .detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.detail-item .detail-label {
    font-size: 0.6rem;
    color: var(--muted);
    margin-top: 0.2rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ================================================================
   Decision Context Panel
   ================================================================ */
.decision-context {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
    margin-top: 0.75rem;
}

.context-title {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.context-item {
    margin-bottom: 1rem;
}

.context-item:last-child {
    margin-bottom: 0;
}

.context-label {
    font-size: 0.6rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.3rem;
}

.context-value {
    font-size: 0.75rem;
    color: var(--text);
    line-height: 1.6;
}

.context-value strong {
    color: var(--success);
}

.context-value .warn {
    color: #ffcc00;
}

.context-value .muted {
    color: var(--muted);
}

/* ================================================================
   Transparency / Simulation Breakdown
   ================================================================ */
.transparency-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--muted);
    font-size: 0.7rem;
    margin-top: 1rem;
    padding: 0.6rem 0;
    user-select: none;
    transition: color 0.15s;
}

.transparency-toggle:hover {
    color: var(--accent-dim);
}

.transparency-toggle .arrow {
    transition: transform 0.2s;
    font-size: 0.55rem;
}

.transparency-toggle.open .arrow {
    transform: rotate(90deg);
}

.transparency-panel {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
}

.transparency-panel.visible {
    max-height: 2000px;
    opacity: 1;
}

.transparency-header {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

/* Scenario grid */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.scenario-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.6rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.scenario-key {
    font-size: 0.55rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.scenario-val {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
}

/* Step-by-step for each option */
.step-option {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    margin-bottom: 0.6rem;
}

.step-option.is-rec {
    border-color: rgba(0, 255, 136, 0.2);
}

.step-option.unavailable {
    opacity: 0.35;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.step-icon {
    font-size: 1rem;
    opacity: 0.5;
}

.step-option.is-rec .step-icon {
    opacity: 1;
}

.step-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    flex: 1;
}

.step-wp {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--muted);
}

.step-wp.best {
    color: var(--success);
}

.step-logic {
    padding-left: 0.25rem;
}

.step-line {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.68rem;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 0.4rem;
}

.step-line strong {
    color: var(--accent-dim);
}

.step-num {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    background: var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    font-weight: 700;
    color: var(--muted);
    margin-top: 1px;
}

.step-result {
    margin-top: 0.5rem;
    padding-top: 0.4rem;
    border-top: 1px solid var(--border);
    font-size: 0.68rem;
    color: var(--text);
}

.step-result strong {
    color: var(--success);
}

.step-option.is-rec .step-result strong {
    color: var(--success);
}

.transparency-footer {
    margin-top: 0.75rem;
    font-size: 0.6rem;
    color: var(--muted);
    opacity: 0.6;
    line-height: 1.6;
    padding: 0.75rem;
    border-top: 1px solid var(--border);
}

/* ================================================================
   About the Model Section
   ================================================================ */
.about-section {
    border-top: 1px solid var(--border);
    padding: 4rem 1.5rem 3rem;
}

.about-container {
    max-width: 800px;
    margin: 0 auto;
}

.about-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.about-intro {
    text-align: center;
    color: var(--muted);
    font-size: 0.75rem;
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.about-block {
    margin-bottom: 2.5rem;
}

.about-block h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.about-block p {
    color: var(--muted);
    font-size: 0.75rem;
    line-height: 1.8;
    margin-bottom: 0.6rem;
}

.about-block strong {
    color: var(--accent-dim);
}

.about-formula {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.7rem 1rem;
    font-size: 0.72rem;
    color: var(--success);
    text-align: center;
    margin: 0.75rem 0;
    letter-spacing: 0.02em;
}

/* Submodel grid */
.submodel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.submodel-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
    transition: border-color 0.15s;
}

.submodel-card:hover {
    border-color: #333;
}

.submodel-icon {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.submodel-card h4 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.4rem;
}

.submodel-card p {
    font-size: 0.68rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 0.6rem;
}

.submodel-stat {
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--success);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.7;
}

/* Rules list */
.rules-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.rule-item {
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
}

.rule-num {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: #000;
}

.rule-item div {
    color: var(--muted);
    font-size: 0.72rem;
    line-height: 1.6;
}

.rule-item strong {
    color: var(--accent-dim);
}

/* Formula grid */
.formula-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.formula-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
}

.formula-item h4 {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.formula-item p {
    font-size: 0.68rem;
    color: var(--muted);
    line-height: 1.6;
    margin-top: 0.4rem;
    margin-bottom: 0;
}

/* Credit */
.about-credit {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.about-credit p {
    color: var(--muted);
    font-size: 0.65rem;
    letter-spacing: 0.04em;
}

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 900px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .input-panel {
        position: static;
    }

    .cards-row {
        grid-template-columns: 1fr;
    }

    .details-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .submodel-grid {
        grid-template-columns: 1fr;
    }

    .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .main-container {
        padding: 1rem;
    }

    .decision-card .win-prob {
        font-size: 1.75rem;
    }
}