/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #222;
    background: #fafafa;
    line-height: 1.5;
}

/* Container and Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #000;
}

.header .subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
    font-style: italic;
}

.main-layout {
    display: grid;
    grid-template-columns: 35% 1fr;
    gap: 2rem;
    align-items: start;
}

/* INPUTS PANEL */
.inputs-panel {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    height: fit-content;
    position: static;
    top: auto;
    max-height: none;
    overflow: visible;
}

.inputs-panel h2 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: #000;
}

.input-group {
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #333;
    font-size: 0.95rem;
}

.helper-text {
    font-size: 0.85rem;
    color: #777;
    margin: -0.6rem 0 0.8rem 0;
    line-height: 1.4;
}

/* Button Group (for audience, bad-minute, events) */
.button-group {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.btn-option {
    flex: 1;
    min-width: 90px;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    background: white;
    color: #333;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-option:hover {
    border-color: #999;
    background: #f5f5f5;
}

.btn-option.active {
    background: #000;
    color: white;
    border-color: #000;
}

/* Slider Group (for discrete range inputs) */
.slider-group {
    --slider-thumb-size: 18px;
    display: grid;
    gap: 0.6rem;
}

.slider-group input[type="range"] {
    width: 100%;
    height: 28px;
    accent-color: #000;
    margin: 0;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

.slider-group input[type="range"]::-webkit-slider-runnable-track {
    height: 4px;
    background: #d0d0d0;
    border-radius: 999px;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: var(--slider-thumb-size);
    height: var(--slider-thumb-size);
    border-radius: 50%;
    background: #000;
    margin-top: calc((4px - var(--slider-thumb-size)) / 2);
    cursor: pointer;
}

.slider-group input[type="range"]::-moz-range-track {
    height: 4px;
    background: #d0d0d0;
    border-radius: 999px;
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: var(--slider-thumb-size);
    height: var(--slider-thumb-size);
    border: none;
    border-radius: 50%;
    background: #000;
    cursor: pointer;
}

.slider-stops {
    position: relative;
    width: 100%;
    height: 30px;
    margin: -0.15rem 0 0 0;
}

.slider-stop {
    position: absolute;
    top: 0;
    display: grid;
    justify-items: center;
    gap: 0.25rem;
    transform: translateX(-50%);
}

.slider-stop:nth-child(1) {
    left: calc(var(--slider-thumb-size) / 2);
}

.slider-stop:nth-child(2) {
    left: calc((var(--slider-thumb-size) / 2) + ((100% - var(--slider-thumb-size)) * 0.25));
}

.slider-stop:nth-child(3) {
    left: calc((var(--slider-thumb-size) / 2) + ((100% - var(--slider-thumb-size)) * 0.5));
}

.slider-stop:nth-child(4) {
    left: calc((var(--slider-thumb-size) / 2) + ((100% - var(--slider-thumb-size)) * 0.75));
}

.slider-stop:nth-child(5) {
    left: calc(100% - (var(--slider-thumb-size) / 2));
}

.slider-stops-4 .slider-stop:nth-child(1) {
    left: calc(var(--slider-thumb-size) / 2);
}

.slider-stops-4 .slider-stop:nth-child(2) {
    left: calc((var(--slider-thumb-size) / 2) + ((100% - var(--slider-thumb-size)) * 0.333333));
}

.slider-stops-4 .slider-stop:nth-child(3) {
    left: calc((var(--slider-thumb-size) / 2) + ((100% - var(--slider-thumb-size)) * 0.666667));
}

.slider-stops-4 .slider-stop:nth-child(4) {
    left: calc(100% - (var(--slider-thumb-size) / 2));
}

.slider-tick {
    width: 1px;
    height: 8px;
    background: #555;
}

.slider-stop-label {
    font-size: 0.72rem;
    color: #666;
    font-weight: 600;
    line-height: 1;
    text-align: center;
}

.slider-comment {
    margin-top: 0.3rem;
}

/* Card Group (for stakes, outage, environment, appetite) */
.card-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
}

.card-option {
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    cursor: pointer;
    background: white;
    transition: all 0.2s ease;
}

.card-option:hover {
    border-color: #999;
    background: #f9f9f9;
}

.card-option.active {
    background: #000;
    color: white;
    border-color: #000;
}

.card-title {
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
}

.card-desc {
    font-size: 0.75rem;
    opacity: 0.8;
    line-height: 1.3;
}

/* OUTPUTS PANEL */
.outputs-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.outputs-panel > .header {
    margin-bottom: 0.5rem;
}

.controls-toggle-mobile {
    display: none;
}

/* Recommendation Card */
.recommendation-card {
    background: #f6f7f8;
    color: #222;
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    box-shadow: none;
}

.recommendation-card h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.rec-why {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    opacity: 0.95;
}

.rec-tagline {
    font-size: 1.1rem;
    font-style: italic;
    padding-top: 1rem;
    border-top: 1px solid #d8dce0;
    opacity: 1;
    color: #444;
}

.rec-tagline:empty {
    display: none;
}

/* Chart Section */
.chart-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.chart-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.chart-container {
    overflow-x: auto;
}

.line-chart {
    width: 100%;
    height: auto;
    max-width: 600px;
    margin: 0 auto;
    display: block;
}

.chart-legend {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px currentColor;
}

/* Tier Cards */
.tier-cards-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.tier-cards-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.tier-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tier-card {
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    padding: 1.5rem;
    background: white;
    transition: all 0.2s ease;
}

.tier-card.recommended {
    border-color: #000;
    background: #f9f9f9;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.tier-card-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #000;
}

.tier-card-desc {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.tier-card-cost {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

.cost-item {
    display: flex;
    flex-direction: column;
}

.cost-label {
    font-size: 0.75rem;
    color: #999;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.cost-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: #000;
}

.tier-card-total {
    background: #f5f5f5;
    padding: 0.8rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.tier-card-total-label {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.3rem;
}

.tier-card-total-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: #000;
}

.tier-card-verdict {
    font-size: 0.85rem;
    font-style: italic;
    color: #666;
}

/* Recommended Build */
.recommended-build {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.recommended-build h3 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.recommended-build ul {
    list-style: none;
    padding: 0;
}

.recommended-build li {
    padding: 0.8rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
    color: #444;
    line-height: 1.5;
}

.recommended-build li:before {
    content: "–";
    position: absolute;
    left: 0;
    color: #999;
}

/* Assumptions Panel */
.assumptions-section {
    background: white;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    overflow: hidden;
}

.assumptions-toggle {
    width: 100%;
    padding: 1.5rem 2rem;
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
}

.assumptions-toggle:hover {
    background: #f9f9f9;
}

.toggle-icon {
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.assumptions-toggle.open .toggle-icon {
    transform: rotate(180deg);
}

.assumptions-panel {
    padding: 0 2rem 2rem 2rem;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 500px;
    }
}

.assumptions-disclaimer {
    font-size: 0.85rem;
    color: #999;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e0e0;
    line-height: 1.5;
}

.assumptions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.assumption-item {
    display: flex;
    flex-direction: column;
}

.assumption-label {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.assumption-value {
    font-size: 0.9rem;
    color: #333;
    padding: 0.6rem;
    background: #f9f9f9;
    border-radius: 4px;
    border: 1px solid #e0e0e0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 40% 1fr;
        gap: 1.5rem;
    }

    .inputs-panel {
        position: static;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .main-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .outputs-panel {
        order: 1;
        gap: 1rem;
    }

    .inputs-panel {
        order: 2;
        padding: 1rem;
        border-radius: 10px;
        border: 1px solid #ddd;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.25s ease, padding 0.2s ease;
    }

    .inputs-panel.mobile-open {
        max-height: 2600px;
        padding: 1rem;
        overflow: visible;
    }

    .controls-toggle-mobile {
        display: inline-block;
        width: 100%;
        text-align: center;
        border: 1px solid #d0d0d0;
        background: #fff;
        color: #222;
        font-weight: 600;
        border-radius: 8px;
        padding: 0.7rem 1rem;
        cursor: pointer;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .header .subtitle {
        font-size: 0.95rem;
    }

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

    .slider-stop-label {
        font-size: 0.66rem;
    }

    .tier-cards {
        display: flex;
        overflow-x: auto;
        gap: 1rem;
        scroll-snap-type: x mandatory;
        padding-bottom: 0.3rem;
    }

    .tier-card {
        min-width: 88%;
        scroll-snap-align: start;
    }

    .recommendation-card {
        padding: 1.2rem;
    }

    .recommendation-card h2 {
        font-size: 1.2rem;
    }

    .chart-section,
    .recommended-build,
    .tier-cards-section,
    .assumptions-section {
        padding: 1.2rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.4rem;
    }

    .header .subtitle {
        font-size: 0.85rem;
    }

    .slider-stop-label {
        font-size: 0.62rem;
    }

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