/**
 * LLM Server Cost Calculator App Styles
 *
 * Two-column calculator layout (Parameters | Results) with scenario,
 * comparison, and formula sections. Uses only design tokens from main.css.
 */

/* ========================================
   App Container
   ======================================== */

.llm-cost-calc {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.llm-cost-calc__app {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* ========================================
   Icon Buttons (help toggle / help close)
   ======================================== */

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: calc(var(--space-10) + var(--space-1));
    height: calc(var(--space-10) + var(--space-1));
    min-width: calc(var(--space-10) + var(--space-1));
    min-height: calc(var(--space-10) + var(--space-1));
    font-family: inherit;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-icon:hover {
    background: var(--color-border);
}

.btn-icon:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn-icon:active {
    transform: scale(0.98);
}

/* ========================================
   Main Two-Column Area
   ======================================== */

.llm-cost-calc__main {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: var(--space-4);
    align-items: start;
}

.llm-cost-calc__panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.llm-cost-calc__panel-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

/* ========================================
   Presets
   ======================================== */

.llm-cost-calc__presets {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.llm-cost-calc__presets-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.llm-cost-calc__preset {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    min-height: 44px;
    padding: var(--space-2) var(--space-3);
    font-family: inherit;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.llm-cost-calc__preset:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

.llm-cost-calc__preset:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.llm-cost-calc__preset:active {
    border-color: var(--color-primary-dark);
}

.llm-cost-calc__preset-name {
    font-weight: 600;
}

.llm-cost-calc__preset-specs {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ========================================
   Parameter Dial Rows
   ======================================== */

.llm-cost-calc__dials {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.llm-cost-calc__row {
    display: grid;
    grid-template-columns: minmax(120px, 1fr) 2fr 90px 48px;
    gap: var(--space-2);
    align-items: center;
}

.llm-cost-calc__label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.llm-cost-calc__range {
    width: 100%;
    min-height: 44px;
    margin: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.llm-cost-calc__range:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-sm);
}

.llm-cost-calc__number {
    width: 100%;
    min-height: 44px;
    padding: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.llm-cost-calc__number:hover {
    border-color: var(--color-border-dark);
}

.llm-cost-calc__number:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.llm-cost-calc__unit {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: right;
}

/* ========================================
   Reset Button
   ======================================== */

.llm-cost-calc__reset {
    align-self: flex-start;
    min-height: 44px;
    padding: var(--space-2) var(--space-4);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.llm-cost-calc__reset:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

.llm-cost-calc__reset:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.llm-cost-calc__reset:active {
    border-color: var(--color-primary-dark);
}

/* ========================================
   Result Cards
   ======================================== */

.llm-cost-calc__cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.llm-cost-calc__card {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.llm-cost-calc__card--highlight {
    border-color: var(--color-primary);
}

.llm-cost-calc__card--highlight .llm-cost-calc__card-label {
    color: var(--color-primary-text);
}

.llm-cost-calc__card--green {
    border-color: var(--color-success);
}

.llm-cost-calc__card--green .llm-cost-calc__card-label {
    color: var(--color-success-text);
}

.llm-cost-calc__card--orange {
    border-color: var(--color-warning);
}

.llm-cost-calc__card--orange .llm-cost-calc__card-label {
    color: var(--color-warning-text);
}

.llm-cost-calc__card-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-muted);
}

.llm-cost-calc__card-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    line-height: var(--line-height-tight);
}

.llm-cost-calc__card-sub {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ========================================
   Full-Width Sections
   ======================================== */

.llm-cost-calc__section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.llm-cost-calc__section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.llm-cost-calc__section-intro {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0;
}

.llm-cost-calc__reference-pricing {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin: 0;
}

.llm-cost-calc__subheading {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin: var(--space-2) 0 0;
}

/* ========================================
   Scenario Grid
   ======================================== */

.llm-cost-calc__scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

/* ========================================
   Comparison Tables
   ======================================== */

.llm-cost-calc__table-wrap {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.llm-cost-calc__table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.llm-cost-calc__table th,
.llm-cost-calc__table td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.llm-cost-calc__table thead th {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
}

.llm-cost-calc__table tbody tr:last-child td {
    border-bottom: none;
}

.llm-cost-calc__table tbody tr:hover {
    background: var(--color-bg-alt);
}

.llm-cost-calc__table td {
    font-family: var(--font-mono);
    color: var(--color-text);
}

.llm-cost-calc__table td.llm-cost-calc__cell-profile {
    font-family: var(--font-sans);
    font-weight: 500;
}

.llm-cost-calc__table tr.llm-cost-calc__row--you td {
    font-weight: 600;
}

.llm-cost-calc__savings--positive {
    color: var(--color-success-text);
}

.llm-cost-calc__savings--negative {
    color: var(--color-error-text);
}

/* ========================================
   Chart
   ======================================== */

.llm-cost-calc__chart-wrap {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.llm-cost-calc__chart {
    width: 100%;
    height: 260px;
    display: block;
}

.llm-cost-calc__legend {
    display: flex;
    gap: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.llm-cost-calc__legend-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.llm-cost-calc__legend-swatch {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: var(--radius-sm);
}

.llm-cost-calc__legend-swatch--self {
    background: var(--color-primary);
}

.llm-cost-calc__legend-swatch--api {
    background: var(--color-warning);
}

/* ========================================
   How It Works (Collapsible)
   ======================================== */

.llm-cost-calc__details {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
}

.llm-cost-calc__details-summary {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    list-style-position: inside;
    transition: background var(--transition-fast);
}

.llm-cost-calc__details-summary:hover {
    background: var(--color-bg-card);
}

.llm-cost-calc__details-summary:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-md);
}

.llm-cost-calc__details-body {
    padding: 0 var(--space-4) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.llm-cost-calc__details-body p {
    margin: 0;
}

.llm-cost-calc__assumptions {
    color: var(--color-text-muted);
}

.llm-cost-calc__formulas {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    line-height: var(--line-height-relaxed);
    color: var(--color-text);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    overflow-x: auto;
    margin: 0;
    white-space: pre;
}

.llm-cost-calc__formula-label {
    display: block;
    font-weight: 600;
    color: var(--color-primary-text);
    margin-top: var(--space-2);
}

.llm-cost-calc__formula-label:first-child {
    margin-top: 0;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .llm-cost-calc__main {
        grid-template-columns: 1fr;
    }

    .llm-cost-calc__row {
        grid-template-columns: 1fr 90px 48px;
        grid-template-areas:
            "label label label"
            "range number unit";
        row-gap: var(--space-1);
    }

    .llm-cost-calc__row .llm-cost-calc__label {
        grid-area: label;
    }

    .llm-cost-calc__row .llm-cost-calc__range {
        grid-area: range;
    }

    .llm-cost-calc__row .llm-cost-calc__number {
        grid-area: number;
    }

    .llm-cost-calc__row .llm-cost-calc__unit {
        grid-area: unit;
    }

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

@media (max-width: 480px) {
    .llm-cost-calc__cards {
        grid-template-columns: 1fr;
    }

    .llm-cost-calc__scenario-grid {
        grid-template-columns: 1fr;
    }
}