/* =============================================
   DeepSeek API Calculator — Frontend Styles
   ============================================= */

:root {
    --dsac-primary: #4D6BFE;
    --dsac-primary-light: #E8ECFF;
    --dsac-primary-dark: #3A51CC;
    --dsac-accent: #10B981;
    --dsac-accent-light: #D1FAE5;
    --dsac-accent-dark: #059669;
    --dsac-danger: #EF4444;
    --dsac-danger-light: #FEE2E2;
    --dsac-warning: #F59E0B;
    --dsac-warning-light: #FEF3C7;
    --dsac-text: #1F2937;
    --dsac-text-secondary: #6B7280;
    --dsac-text-light: #9CA3AF;
    --dsac-bg: #FFFFFF;
    --dsac-bg-secondary: #F9FAFB;
    --dsac-bg-tertiary: #F3F4F6;
    --dsac-border: #E5E7EB;
    --dsac-border-dark: #D1D5DB;
    --dsac-radius: 12px;
    --dsac-radius-sm: 8px;
    --dsac-radius-lg: 16px;
    --dsac-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --dsac-shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.06);
    --dsac-shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.06);
    --dsac-transition: 0.2s ease;
}

/* ---- Dark mode ---- */
@media (prefers-color-scheme: dark) {
    :root {
        --dsac-text: #F3F4F6;
        --dsac-text-secondary: #9CA3AF;
        --dsac-text-light: #6B7280;
        --dsac-bg: #1F2937;
        --dsac-bg-secondary: #283141;
        --dsac-bg-tertiary: #374151;
        --dsac-border: #374151;
        --dsac-border-dark: #4B5563;
        --dsac-primary-light: #2A2F4A;
        --dsac-accent-light: #1A3D2E;
        --dsac-danger-light: #3D1C1C;
        --dsac-warning-light: #3D2E0E;
    }
}

/* ---- Reset ---- */
.dsac-widget,
.dsac-widget * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ---- Widget Container ---- */
.dsac-widget {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--dsac-text);
    background: var(--dsac-bg);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-lg);
    padding: 28px;
    margin: 24px 0;
    box-shadow: var(--dsac-shadow);
    max-width: 800px;
    line-height: 1.6;
}

.dsac-widget + .dsac-widget {
    margin-top: 20px;
}

/* ---- Widget Header ---- */
.dsac-widget-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--dsac-border);
}

.dsac-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--dsac-radius-sm);
    background: var(--dsac-primary-light);
    color: var(--dsac-primary);
    flex-shrink: 0;
}

.dsac-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dsac-text);
    margin: 0 !important;
    padding: 0 !important;
    line-height: 1.3;
}

.dsac-subtitle {
    font-size: 14px;
    color: var(--dsac-text-secondary);
    margin: -12px 0 20px;
}

/* ---- Form Elements ---- */
.dsac-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 24px;
}

.dsac-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dsac-field-row {
    display: flex;
    gap: 16px;
}

.dsac-field-half {
    flex: 1;
    min-width: 0;
}

.dsac-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--dsac-text);
}

.dsac-hint {
    font-size: 12px;
    color: var(--dsac-text-light);
    margin-top: 2px;
}

.dsac-select,
.dsac-input {
    font-family: inherit;
    font-size: 15px;
    color: var(--dsac-text);
    background: var(--dsac-bg-secondary);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 10px 14px;
    width: 100%;
    transition: border-color var(--dsac-transition), box-shadow var(--dsac-transition);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.dsac-select {
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236B7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
    cursor: pointer;
}

.dsac-select:focus,
.dsac-input:focus {
    border-color: var(--dsac-primary);
    box-shadow: 0 0 0 3px rgba(77, 107, 254, 0.15);
}

.dsac-input-readonly {
    opacity: 0.7;
    cursor: default;
}

.dsac-textarea {
    font-family: inherit;
    font-size: 15px;
    color: var(--dsac-text);
    background: var(--dsac-bg-secondary);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 12px 14px;
    width: 100%;
    resize: vertical;
    min-height: 120px;
    outline: none;
    transition: border-color var(--dsac-transition);
    line-height: 1.6;
}

.dsac-textarea:focus {
    border-color: var(--dsac-primary);
    box-shadow: 0 0 0 3px rgba(77, 107, 254, 0.15);
}

/* ---- Range Slider ---- */
.dsac-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--dsac-bg-tertiary);
    outline: none;
    border: none;
    margin: 8px 0 4px;
}

.dsac-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--dsac-primary);
    cursor: pointer;
    border: 3px solid var(--dsac-bg);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    transition: transform 0.15s ease;
}

.dsac-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.dsac-range::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--dsac-primary);
    cursor: pointer;
    border: 3px solid var(--dsac-bg);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.dsac-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--dsac-text-light);
}

/* ---- Results Section ---- */
.dsac-results {
    background: var(--dsac-bg-secondary);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius);
    padding: 20px;
}

.dsac-results-header {
    font-size: 16px;
    font-weight: 700;
    color: var(--dsac-text);
    margin-bottom: 16px;
}

.dsac-results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.dsac-result-card {
    background: var(--dsac-bg);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 14px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dsac-result-label {
    font-size: 12px;
    color: var(--dsac-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dsac-result-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--dsac-text);
    font-variant-numeric: tabular-nums;
}

.dsac-result-highlight {
    background: var(--dsac-primary-light);
    border-color: var(--dsac-primary);
}

.dsac-result-highlight .dsac-result-value {
    color: var(--dsac-primary);
}

/* ---- Breakdown ---- */
.dsac-breakdown {
    background: var(--dsac-bg);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 14px;
    margin-bottom: 16px;
}

.dsac-breakdown-header {
    font-size: 13px;
    font-weight: 600;
    color: var(--dsac-text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dsac-breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 14px;
    color: var(--dsac-text-secondary);
    border-bottom: 1px solid var(--dsac-border);
}

.dsac-breakdown-row:last-child {
    border-bottom: none;
}

.dsac-breakdown-total {
    font-weight: 700;
    color: var(--dsac-text);
    padding-top: 10px;
    margin-top: 4px;
    border-top: 2px solid var(--dsac-border-dark);
    border-bottom: none;
}

/* ---- Savings Badge ---- */
.dsac-savings {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--dsac-accent-light);
    border: 1px solid var(--dsac-accent);
    border-radius: var(--dsac-radius-sm);
    padding: 12px 16px;
}

.dsac-savings-icon {
    color: var(--dsac-accent);
    flex-shrink: 0;
}

.dsac-savings-text {
    font-size: 14px;
    color: var(--dsac-accent-dark);
}

@media (prefers-color-scheme: dark) {
    .dsac-savings-text {
        color: var(--dsac-accent);
    }
}

/* ---- Token Counter Stats ---- */
.dsac-token-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.dsac-stat {
    background: var(--dsac-bg-secondary);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dsac-stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--dsac-text);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.dsac-stat-label {
    font-size: 12px;
    color: var(--dsac-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dsac-stat-highlight {
    background: var(--dsac-accent-light);
    border-color: var(--dsac-accent);
}

.dsac-stat-highlight .dsac-stat-value {
    color: var(--dsac-accent-dark);
}

@media (prefers-color-scheme: dark) {
    .dsac-stat-highlight .dsac-stat-value {
        color: var(--dsac-accent);
    }
}

.dsac-token-note {
    font-size: 12px;
    color: var(--dsac-text-light);
    text-align: center;
    padding: 4px 0;
}

/* ---- Tables ---- */
.dsac-table-wrap {
    overflow-x: auto;
    margin-bottom: 16px;
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
}

.dsac-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.dsac-table thead {
    background: var(--dsac-bg-tertiary);
}

.dsac-table th {
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--dsac-text-secondary);
    border-bottom: 2px solid var(--dsac-border);
    white-space: nowrap;
}

.dsac-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--dsac-border);
    vertical-align: middle;
}

.dsac-table tbody tr:last-child td {
    border-bottom: none;
}

.dsac-table tbody tr:hover {
    background: var(--dsac-bg-secondary);
}

.dsac-price-cell {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.dsac-price-green {
    color: var(--dsac-accent-dark);
}

@media (prefers-color-scheme: dark) {
    .dsac-price-green {
        color: var(--dsac-accent);
    }
}

.dsac-row-highlight {
    background: var(--dsac-primary-light) !important;
}

.dsac-row-highlight td {
    border-bottom-color: var(--dsac-primary) !important;
}

/* ---- Badges ---- */
.dsac-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.dsac-badge-green {
    background: var(--dsac-accent-light);
    color: var(--dsac-accent-dark);
}

.dsac-badge-red {
    background: var(--dsac-danger-light);
    color: var(--dsac-danger);
}

@media (prefers-color-scheme: dark) {
    .dsac-badge-green {
        color: var(--dsac-accent);
    }
}

.dsac-savings-cell {
    text-align: center;
}

/* ---- Cache Note ---- */
.dsac-cache-note {
    background: var(--dsac-warning-light);
    border: 1px solid var(--dsac-warning);
    border-radius: var(--dsac-radius-sm);
    padding: 12px 16px;
    font-size: 13px;
    color: var(--dsac-text);
    margin-bottom: 20px;
    line-height: 1.6;
}

.dsac-comparison-note {
    font-size: 12px;
    color: var(--dsac-text-light);
    text-align: center;
    padding: 8px 0;
}

/* ---- Features Grid ---- */
.dsac-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.dsac-feature-card {
    background: var(--dsac-bg-secondary);
    border: 1px solid var(--dsac-border);
    border-radius: var(--dsac-radius-sm);
    padding: 18px;
}

.dsac-feature-card h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--dsac-text);
    margin: 0 0 12px;
}

.dsac-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dsac-feature-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--dsac-text-secondary);
}

.dsac-feature-list li svg {
    flex-shrink: 0;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
    .dsac-widget {
        padding: 18px;
        border-radius: var(--dsac-radius);
    }

    .dsac-field-row {
        flex-direction: column;
        gap: 14px;
    }

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

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

    .dsac-stat-value {
        font-size: 22px;
    }

    .dsac-result-value {
        font-size: 18px;
    }

    .dsac-title {
        font-size: 17px;
    }

    .dsac-table {
        font-size: 13px;
    }

    .dsac-table th,
    .dsac-table td {
        padding: 10px;
    }
}

@media (max-width: 420px) {
    .dsac-widget {
        padding: 14px;
    }

    .dsac-results-grid {
        grid-template-columns: 1fr 1fr;
    }

    .dsac-token-stats {
        grid-template-columns: 1fr 1fr;
    }
}