/**
 * HeuriSight Modal System
 * Based on: mockups/apple-redesign/09-ui-primitives.html
 * 
 * Usage:
 *   <div class="hs-modal-backdrop visible">
 *     <div class="hs-modal visible">
 *       <div class="hs-modal__header">...</div>
 *       <div class="hs-modal__body">...</div>
 *       <div class="hs-modal__footer">...</div>
 *     </div>
 *   </div>
 */

/* =============================================================================
   MODAL BACKDROP
   ============================================================================= */

.hs-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-overlay, 9000);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal, 250ms) var(--ease-default),
                visibility var(--duration-normal, 250ms) var(--ease-default);
    /* Ensure flexbox centering when visible */
    display: flex;
    align-items: center;
    justify-content: center;
}

.hs-modal-backdrop.visible {
    opacity: 1;
    visibility: visible;
    display: flex;
}

/* =============================================================================
   MODAL CONTAINER
   ============================================================================= */

.hs-modal {
    position: relative;  /* Changed from fixed - backdrop handles positioning */
    background: var(--bg-secondary, #F5F5F7);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-modal, 9500);
    max-width: min(480px, 90vw);
    max-height: 90vh;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
    transition: all var(--duration-normal, 250ms) var(--ease-default);
}

.hs-modal,
.hs-modal *,
.modal-shell,
.modal-shell * {
    box-sizing: border-box;
}

#simulation-modal,
#simulation-modal * {
    box-sizing: border-box;
}

.hs-modal.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

/* Modal Sizes */
.hs-modal--sm { max-width: min(360px, 90vw); }
.hs-modal--md { max-width: min(480px, 90vw); }
.hs-modal--lg { max-width: min(640px, 95vw); }
.hs-modal--xl { max-width: min(920px, 95vw); }
.hs-modal--xxl { max-width: min(1100px, 95vw); }
.hs-modal--full {
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
}

/* Critical z-index for modals that must appear above everything */
.hs-modal-backdrop--critical {
    z-index: var(--z-critical, 10000) !important;
}
.hs-modal-backdrop--critical .hs-modal {
    z-index: calc(var(--z-critical, 10000) + 1) !important;
}

/* =============================================================================
   MODAL PARTS
   ============================================================================= */

.hs-modal__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--space-5, 20px) var(--space-6, 24px);
    border-bottom: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
}

.hs-modal__title {
    font-size: var(--text-lg, 17px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin: 0;
}

.hs-modal__subtitle {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-top: var(--space-1, 4px);
}

.hs-modal__close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm, 8px);
    color: var(--text-tertiary, #86868B);
    cursor: pointer;
    transition: background var(--duration-fast, 150ms) var(--ease-default),
                color var(--duration-fast, 150ms) var(--ease-default);
    flex-shrink: 0;
    margin-left: var(--space-3, 12px);
}

.hs-modal__close:hover {
    background: var(--bg-tertiary, #E8E8ED);
    color: var(--text-primary, #1D1D1F);
}

.hs-modal__close svg {
    width: 16px;
    height: 16px;
}

.hs-modal__body {
    padding: var(--space-6, 24px);
    overflow-y: auto;
    max-height: calc(90vh - 140px);
    color: var(--text-secondary, #6E6E73);
    font-size: var(--text-base, 15px);
    line-height: 1.5;
    min-width: 0;
}

.hs-modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3, 12px);
    padding: var(--space-4, 16px) var(--space-6, 24px);
    border-top: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
}

/* =============================================================================
  RESPONSIVE
  ============================================================================= */

@media (max-width: 768px) {
    .hs-modal {
        max-width: min(100vw, 100%);
        border-radius: var(--radius-md, 12px);
    }

    .hs-modal__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2, 8px);
    }

    .hs-modal__body {
        padding: var(--space-5, 20px);
    }

    .hs-modal__footer {
        flex-direction: column;
        align-items: stretch;
    }
}

/* =============================================================================
   CONFIRM DIALOG
   ============================================================================= */

.hs-confirm {
    text-align: center;
    padding: var(--space-6, 24px);
}

.hs-confirm__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4, 16px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--destructive-subtle, rgba(255, 59, 48, 0.1));
    color: var(--destructive, #FF3B30);
}

.hs-confirm__icon svg {
    width: 24px;
    height: 24px;
}

.hs-confirm__icon--warning {
    background: var(--warning-subtle, rgba(255, 149, 0, 0.1));
    color: var(--warning, #FF9500);
}

.hs-confirm__icon--info {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    color: var(--accent, #0071E3);
}

.hs-confirm__icon--success {
    background: var(--success-subtle, rgba(52, 199, 89, 0.1));
    color: var(--success, #34C759);
}

.hs-confirm__title {
    font-size: var(--text-lg, 17px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin-bottom: var(--space-2, 8px);
}

.hs-confirm__message {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-bottom: var(--space-6, 24px);
    line-height: 1.5;
}

.hs-confirm__actions {
    display: flex;
    gap: var(--space-3, 12px);
    justify-content: center;
}

.hs-confirm__actions .btn,
.hs-confirm__actions .hs-btn {
    flex: 1;
    max-width: 120px;
}

/* =============================================================================
   PROMPT DIALOG
   ============================================================================= */

.hs-prompt {
    padding: var(--space-6, 24px);
}

.hs-prompt__title {
    font-size: var(--text-lg, 17px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin-bottom: var(--space-4, 16px);
}

.hs-prompt__input {
    width: 100%;
    padding: var(--space-3, 12px) var(--space-4, 16px);
    font-size: var(--text-base, 15px);
    background: var(--bg-tertiary, #E8E8ED);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-sm, 8px);
    color: var(--text-primary, #1D1D1F);
    margin-bottom: var(--space-6, 24px);
    font-family: inherit;
}

.hs-prompt__input::placeholder {
    color: var(--text-tertiary, #86868B);
}

.hs-prompt__input:focus {
    outline: none;
    border-color: var(--accent, #0071E3);
    box-shadow: 0 0 0 3px var(--accent-subtle, rgba(0, 113, 227, 0.2));
}

.hs-prompt__actions {
    display: flex;
    gap: var(--space-3, 12px);
    justify-content: flex-end;
}

/* =============================================================================
   MODAL-OVERLAY (used by modalUtils.createModal)
   Must have high z-index to appear above all other content
   ============================================================================= */

.modal-overlay {
    position: fixed !important;
    inset: 0 !important;
    background: rgba(0, 0, 0, 0.5) !important;
    z-index: 10001 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: var(--space-4, 16px);
    overflow: auto;
}

/* =============================================================================
   LEGACY MODAL CLASSES (from mockups)
   ============================================================================= */

.modal-demo {
    position: relative;
    background: rgba(0, 0, 0, 0.6);
    border-radius: var(--radius-md, 12px);
    padding: var(--space-10, 40px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-container {
    background: var(--bg-secondary, #F5F5F7);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-lg, 16px);
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--space-5, 20px) var(--space-6, 24px);
    border-bottom: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
}

.modal-title {
    font-size: var(--text-lg, 17px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
}

.modal-subtitle {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-top: var(--space-1, 4px);
}

.modal-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm, 8px);
    color: var(--text-tertiary, #86868B);
    cursor: pointer;
}

.modal-close:hover {
    background: var(--bg-tertiary, #E8E8ED);
    color: var(--text-primary, #1D1D1F);
}

.modal-body {
    padding: var(--space-6, 24px);
    color: var(--text-secondary, #6E6E73);
    font-size: var(--text-base, 15px);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3, 12px);
    padding: var(--space-4, 16px) var(--space-6, 24px);
    border-top: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
}

/* =============================================================================
   MODAL SHELL (used by optimization, etc.)
   ============================================================================= */

.modal-shell {
    background: var(--bg-primary, #FFFFFF);
    border: 1px solid var(--border-light, rgba(0, 0, 0, 0.06));
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Modal Shell Sizes */
.modal-shell--sm { max-width: 360px; }
.modal-shell--md { max-width: 480px; }
.modal-shell--lg { max-width: 640px; }
.modal-shell--xl { max-width: 800px; }

.modal-shell__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--space-5, 20px) var(--space-6, 24px);
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, 0.06));
}

.modal-shell__title {
    font-size: var(--text-lg, 17px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin: 0;
}

.modal-shell__subtitle {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-top: var(--space-1, 4px);
}

.modal-shell__close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm, 6px);
    color: var(--text-tertiary, #86868B);
    cursor: pointer;
    transition: background var(--duration-fast, 150ms), color var(--duration-fast, 150ms);
    flex-shrink: 0;
    margin-left: var(--space-3, 12px);
}

.modal-shell__close:hover {
    background: var(--bg-tertiary, #F5F5F7);
    color: var(--text-primary, #1D1D1F);
}

.modal-shell__close svg {
    width: 16px;
    height: 16px;
}

.modal-shell__body {
    padding: var(--space-6, 24px);
    overflow-y: auto;
    flex: 1;
    min-width: 0;
}

.hs-modal__body > *,
.modal-shell__body > * {
    max-width: 100%;
}

/* Simulation modal settings */
.simulation-settings__grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.simulation-settings input {
    width: 100%;
    min-width: 0;
}

.modal-shell__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3, 12px);
    padding: var(--space-4, 16px) var(--space-6, 24px);
    border-top: 1px solid var(--border-light, rgba(0, 0, 0, 0.06));
}

/* =============================================================================
   OPTIMIZATION MODAL
   ============================================================================= */

.optimization-modal__header-content {
    display: flex;
    align-items: center;
    gap: var(--space-3, 12px);
}

.optimization-modal__icon-wrapper {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    border-radius: var(--radius-md, 12px);
}

.optimization-modal__icon {
    width: 20px;
    height: 20px;
    color: var(--accent, #0071E3);
}

.optimization-section {
    margin-bottom: var(--space-5, 20px);
}

.optimization-section:last-child {
    margin-bottom: 0;
}

.optimization-section__title {
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary, #86868B);
    margin: 0 0 var(--space-2, 8px) 0;
}

.optimization-section__text {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    line-height: 1.5;
    margin: 0;
}

.optimization-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.optimization-list__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2, 8px);
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-bottom: var(--space-2, 8px);
}

.optimization-list__item:last-child {
    margin-bottom: 0;
}

.optimization-list__item strong {
    color: var(--text-primary, #1D1D1F);
    font-weight: 500;
}

.optimization-list-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--text-tertiary, #86868B);
}

.optimization-list-icon--success {
    color: var(--success, #34C759);
}

.optimization-list-icon--warning {
    color: var(--warning, #FF9500);
}

/* =============================================================================
   OPTIMIZATION PROGRESS MODAL
   ============================================================================= */

.optimization-progress-section {
    margin-bottom: var(--space-5, 20px);
}

.optimization-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2, 8px);
}

.optimization-progress-label {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
}

.optimization-progress-percent {
    font-size: var(--text-sm, 13px);
    font-weight: 600;
    color: var(--accent, #0071E3);
}

.optimization-current-step {
    margin-bottom: var(--space-5, 20px);
}

.optimization-step-title {
    font-size: var(--text-base, 15px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin: 0 0 var(--space-2, 8px) 0;
}

.optimization-step-description {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin: 0 0 var(--space-2, 8px) 0;
}

.optimization-step-details {
    font-size: var(--text-sm, 13px);
    color: var(--text-tertiary, #86868B);
}

.optimization-time-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin-bottom: var(--space-5, 20px);
    padding: var(--space-3, 12px);
    background: var(--bg-tertiary, #FAFAFA);
    border-radius: var(--radius-sm, 6px);
}

.optimization-time-value {
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
}

.optimization-history {
    margin-bottom: var(--space-5, 20px);
}

.optimization-history-title {
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary, #86868B);
    margin: 0 0 var(--space-2, 8px) 0;
}

.optimization-history-list {
    max-height: 160px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 8px);
}

.optimization-results {
    margin-bottom: var(--space-4, 16px);
}

.optimization-results.hidden {
    display: none;
}

.optimization-results-title {
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary, #86868B);
    margin: 0 0 var(--space-3, 12px) 0;
}

.optimization-results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3, 12px);
    margin-bottom: var(--space-3, 12px);
}

.optimization-result-card {
    background: var(--bg-tertiary, #FAFAFA);
    border-radius: var(--radius-sm, 6px);
    padding: var(--space-3, 12px);
    text-align: center;
}

.optimization-result-label {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
    margin-bottom: var(--space-1, 4px);
}

.optimization-result-value {
    font-size: var(--text-xl, 20px);
    font-weight: 700;
    color: var(--text-primary, #1D1D1F);
}

.optimization-result-details {
    font-size: var(--text-sm, 13px);
    color: var(--text-tertiary, #86868B);
    background: var(--bg-tertiary, #FAFAFA);
    border-radius: var(--radius-sm, 6px);
    padding: var(--space-3, 12px);
}

/* Progress bar styles */
.progress-track {
    height: 8px;
    background: var(--bg-tertiary, #E8E8ED);
    border-radius: var(--radius-full, 9999px);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent, #0071E3);
    border-radius: var(--radius-full, 9999px);
    transition: width var(--duration-normal, 250ms) var(--ease-default);
}

/* =============================================================================
   DARK THEME
   ============================================================================= */

[data-theme="dark"] .optimization-time-info,
[data-theme="dark"] .optimization-result-card,
[data-theme="dark"] .optimization-result-details {
    background: var(--bg-tertiary, #3A3A3C);
}

[data-theme="dark"] .optimization-step-title,
[data-theme="dark"] .optimization-time-value,
[data-theme="dark"] .optimization-result-value {
    color: var(--text-primary, #F5F5F7);
}

/* =============================================================================
   OPTIMIZATION MODAL ENHANCEMENTS
   ============================================================================= */

.optimization-modal {
    max-width: 560px;
}

/* Header icon wrappers */
.modal-shell__icon-wrapper--accent {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    border-radius: var(--radius-md, 12px);
    flex-shrink: 0;
}

.modal-shell__icon-wrapper--success {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-subtle, rgba(52, 199, 89, 0.1));
    border-radius: var(--radius-md, 12px);
    flex-shrink: 0;
}

.modal-shell__icon-wrapper--success .optimization-icon {
    color: var(--success, #34C759);
}

.modal-shell__icon-wrapper--warning {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--warning-subtle, rgba(255, 149, 0, 0.1));
    border-radius: var(--radius-md, 12px);
    flex-shrink: 0;
}

.modal-shell__icon-wrapper--warning .optimization-icon {
    color: var(--warning, #FF9500);
}

.modal-shell__header-content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4, 16px);
}

/* Optimization icons */
.optimization-icon {
    width: 22px;
    height: 22px;
    color: var(--accent, #0071E3);
}

.optimization-icon--sm {
    width: 16px;
    height: 16px;
}

/* Time info with icon */
.optimization-time-info {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    padding: var(--space-3, 12px) var(--space-4, 16px);
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-sm, 8px);
    margin-bottom: var(--space-5, 20px);
}

.optimization-time-info__icon {
    display: flex;
    align-items: center;
    color: var(--text-tertiary, #86868B);
}

.optimization-time-info__label {
    flex: 1;
}

.optimization-time-value {
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    font-variant-numeric: tabular-nums;
}

/* Results section */
.optimization-results {
    margin-top: var(--space-5, 20px);
}

.optimization-results__header {
    display: flex;
    align-items: center;
    gap: var(--space-4, 16px);
    padding: var(--space-4, 16px);
    background: var(--success-subtle, rgba(52, 199, 89, 0.08));
    border-radius: var(--radius-md, 12px);
    margin-bottom: var(--space-4, 16px);
}

.optimization-results__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary, #FFFFFF);
    border-radius: var(--radius-sm, 8px);
    flex-shrink: 0;
}

.optimization-results__icon .optimization-icon {
    color: var(--success, #34C759);
}

.optimization-results__title {
    font-size: var(--text-base, 15px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
    margin: 0;
}

.optimization-results__subtitle {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
    margin: var(--space-1, 4px) 0 0;
}

/* Result cards grid */
.optimization-results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3, 12px);
}

.optimization-result-card {
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-sm, 8px);
    padding: var(--space-4, 16px);
    text-align: center;
}

.optimization-result-label {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
    margin-bottom: var(--space-1, 4px);
}

.optimization-result-value {
    font-size: var(--text-2xl, 24px);
    font-weight: 700;
    color: var(--accent, #0071E3);
    font-variant-numeric: tabular-nums;
}

/* Progress history */
.optimization-history {
    margin-bottom: var(--space-4, 16px);
}

.optimization-history-title {
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    color: var(--text-tertiary, #86868B);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 var(--space-3, 12px);
}

.optimization-history-list {
    max-height: 120px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 8px);
}

.optimization-step-history-item {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: var(--space-2, 8px);
    align-items: center;
    padding: var(--space-2, 8px) var(--space-3, 12px);
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-sm, 8px);
    font-size: var(--text-xs, 11px);
}

.optimization-step-history-item .step-time {
    color: var(--text-tertiary, #86868B);
    font-variant-numeric: tabular-nums;
}

.optimization-step-history-item .step-title {
    font-weight: 500;
    color: var(--text-primary, #1D1D1F);
}

.optimization-step-history-item .step-message {
    display: none; /* Hidden to save space */
}

.optimization-step-history-item .step-progress {
    font-weight: 600;
    color: var(--accent, #0071E3);
}

/* Button icon inline */
.btn .optimization-icon--sm {
    margin-right: var(--space-2, 8px);
}

/* Dark theme */
[data-theme="dark"] .modal-shell__icon-wrapper--accent {
    background: rgba(0, 113, 227, 0.15);
}

[data-theme="dark"] .modal-shell__icon-wrapper--success {
    background: rgba(52, 199, 89, 0.15);
}

[data-theme="dark"] .modal-shell__icon-wrapper--warning {
    background: rgba(255, 149, 0, 0.15);
}

[data-theme="dark"] .optimization-time-info {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .optimization-results__header {
    background: rgba(52, 199, 89, 0.1);
}

[data-theme="dark"] .optimization-results__icon {
    background: var(--bg-secondary, #1C1C1E);
}

[data-theme="dark"] .optimization-results__title {
    color: var(--text-primary, #F5F5F7);
}

[data-theme="dark"] .optimization-result-card {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .optimization-step-history-item {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .optimization-step-history-item .step-title {
    color: var(--text-primary, #F5F5F7);
}

[data-theme="dark"] .progress-track {
    background: var(--bg-tertiary, #3A3A3C);
}

[data-theme="dark"] .modal-shell {
    background: var(--bg-primary, #1C1C1E);
    border-color: var(--border-light, rgba(255, 255, 255, 0.08));
}

[data-theme="dark"] .modal-shell__header,
[data-theme="dark"] .modal-shell__footer {
    border-color: var(--border-light, rgba(255, 255, 255, 0.08));
}

[data-theme="dark"] .modal-shell__title {
    color: var(--text-primary, #F5F5F7);
}

[data-theme="dark"] .modal-shell__close:hover {
    background: var(--bg-tertiary, #3A3A3C);
}

[data-theme="dark"] .optimization-modal__icon-wrapper {
    background: rgba(0, 113, 227, 0.15);
}

[data-theme="dark"] .optimization-list__item strong {
    color: var(--text-primary, #F5F5F7);
}

/* =============================================================================
   DARK THEME
   ============================================================================= */

[data-theme="dark"] .hs-modal,
[data-theme="dark"] .modal-container {
    background: var(--bg-secondary, #2C2C2E);
    border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .hs-modal__close:hover,
[data-theme="dark"] .modal-close:hover {
    background: var(--bg-tertiary, #3A3A3C);
}

[data-theme="dark"] .hs-prompt__input {
    background: var(--bg-tertiary, #3A3A3C);
    border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

/* =============================================================================
   REDUCED MOTION
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
    .hs-modal-backdrop,
    .hs-modal {
        transition: none;
    }
}

/* =============================================================================
   UPLOAD PROGRESS MODAL
   ============================================================================= */

.upload-modal {
    max-width: 520px;
}

.upload-modal__header-content {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.upload-modal__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    border-radius: 10px;
    color: var(--accent, #007AFF);
}

.upload-modal__icon .upload-header-icon {
    width: 22px;
    height: 22px;
}

.upload-modal__header-text {
    flex: 1;
    min-width: 0;
}

.upload-modal__status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 4px;
}

.upload-modal__status-text {
    font-size: 13px;
    color: var(--text-secondary, #6E6E73);
}

.upload-modal__percentage {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent, #007AFF);
}

/* Upload Progress Bar */
.upload-progress {
    margin-bottom: 20px;
}

.upload-progress__track {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary, #E5E5EA);
    border-radius: 3px;
    overflow: hidden;
}

.upload-progress__fill {
    height: 100%;
    background: var(--accent, #007AFF);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.upload-progress__fill--queued {
    background: var(--warning, #FF9500);
}

/* Current File Section */
.upload-current-file {
    background: var(--bg-secondary, #F5F5F7);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 16px;
}

.upload-current-file__title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary, #1D1D1F);
    margin: 0 0 4px;
}

.upload-current-file__desc {
    font-size: 12px;
    color: var(--text-secondary, #6E6E73);
    margin: 0;
}

/* File List */
.upload-file-list-container {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 16px;
}

.upload-file-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.upload-file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-secondary, #F5F5F7);
    border-radius: 8px;
}

.upload-file-item--processing {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.06));
}

.upload-file-item--complete {
    background: rgba(52, 199, 89, 0.08);
}

.upload-file-item--error {
    background: rgba(255, 59, 48, 0.08);
}

.upload-file-item--queued {
    background: rgba(255, 149, 0, 0.08);
}

.upload-file-item__icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary, #FFFFFF);
    border-radius: 6px;
    color: var(--text-secondary, #86868B);
}

.upload-file-item__icon .upload-file-icon {
    width: 18px;
    height: 18px;
}

.upload-file-item__icon .upload-status-icon {
    width: 18px;
    height: 18px;
}

.upload-file-item__icon .upload-status-icon--success {
    color: var(--success, #34C759);
}

.upload-file-item__icon .upload-status-icon--error {
    color: var(--error, #FF3B30);
}

.upload-file-item__info {
    flex: 1;
    min-width: 0;
}

.upload-file-item__name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary, #1D1D1F);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-file-item__status {
    font-size: 11px;
    color: var(--text-tertiary, #86868B);
    margin-top: 2px;
}

.upload-file-item__progress {
    flex-shrink: 0;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent, #007AFF);
    min-width: 36px;
    text-align: right;
}

/* Time Info */
.upload-time-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-tertiary, #86868B);
    padding: 8px 0;
}

.upload-time-info .upload-time-icon {
    width: 14px;
    height: 14px;
}

/* Results Section */
.upload-results {
    margin-top: 16px;
}

.upload-results__card {
    background: rgba(52, 199, 89, 0.08);
    border-radius: 10px;
    padding: 16px;
}

.upload-results__card--queued {
    background: rgba(255, 149, 0, 0.08);
}

.upload-results__title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--success, #34C759);
    margin: 0 0 8px;
}

.upload-results__title .upload-status-icon--success {
    width: 18px;
    height: 18px;
}

.upload-results__icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    vertical-align: text-bottom;
    flex-shrink: 0;
}

.upload-results__content {
    font-size: 13px;
    color: var(--text-secondary, #6E6E73);
}

/* Dark theme for upload modal */
[data-theme="dark"] .upload-modal__icon {
    background: rgba(10, 132, 255, 0.15);
}

[data-theme="dark"] .upload-progress__track {
    background: var(--bg-tertiary, #3A3A3C);
}

[data-theme="dark"] .upload-current-file {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .upload-file-item {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .upload-file-item__icon {
    background: var(--bg-secondary, #1C1C1E);
}

[data-theme="dark"] .upload-file-item__name {
    color: var(--text-primary, #F5F5F7);
}

[data-theme="dark"] .upload-current-file__title {
    color: var(--text-primary, #F5F5F7);
}

/* Upload Spinner */
.upload-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-light, #E5E5EA);
    border-top-color: var(--accent, #007AFF);
    border-radius: 50%;
    animation: upload-spin 0.8s linear infinite;
}

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

.upload-results__hint {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 8px;
    padding: 10px 12px;
    background: var(--bg-secondary, #F5F5F7);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-secondary, #6E6E73);
}

.upload-results__hint .upload-info-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--accent, #007AFF);
}

[data-theme="dark"] .upload-results__hint {
    background: var(--bg-tertiary, #2C2C2E);
}

.upload-results__success {
    margin-top: 8px;
    font-size: 12px;
    color: var(--success, #34C759);
}

/* Queued state styling */
.upload-file-item--queued .upload-file-item__icon {
    color: var(--warning, #FF9500);
}

.upload-file-item--queued .upload-file-item__progress {
    color: var(--warning, #FF9500);
}

/* =============================================================================
   DOCUMENT VIEWER MODAL
   Modal for viewing document chunks from citations/sources
   ============================================================================= */

/* Document viewer modal specific styling */
#document-viewer-modal .modal-shell {
    max-width: 720px;
}

#document-viewer-modal .modal-shell__body {
    max-height: 60vh;
    overflow-y: auto;
}

/* Document viewer header */
.document-viewer__header-content {
    flex: 1;
    min-width: 0;
}

.document-viewer__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2, 8px);
    margin-top: var(--space-1, 4px);
}

.document-viewer__meta-item {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
}

.document-viewer__meta-separator {
    color: var(--text-tertiary, #86868B);
}

/* Loading state */
.document-viewer__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8, 32px);
    color: var(--text-secondary, #6E6E73);
}

.document-viewer__loading p {
    margin: 0;
    font-size: var(--text-sm, 13px);
}

.document-viewer__spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-light, rgba(0, 0, 0, 0.1));
    border-top-color: var(--accent, #0071E3);
    border-radius: 50%;
    animation: document-viewer-spin 0.8s linear infinite;
    margin-bottom: var(--space-4, 16px);
}

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

/* Empty/error states */
.document-viewer__empty,
.document-viewer__error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8, 32px);
    text-align: center;
}

.document-viewer__empty p,
.document-viewer__error p {
    margin: 0;
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
}

.document-viewer__error p {
    color: var(--destructive, #FF3B30);
}

/* Document chunk styling */
.document-chunk {
    margin-bottom: var(--space-4, 16px);
    padding: var(--space-4, 16px);
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-md, 10px);
    border-left: 3px solid var(--accent, #0071E3);
}

.document-chunk:last-child {
    margin-bottom: 0;
}

.document-chunk__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3, 12px);
    padding-bottom: var(--space-2, 8px);
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, 0.06));
}

.document-chunk__label {
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    color: var(--text-tertiary, #86868B);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.document-chunk__view-source {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1, 4px);
    padding: var(--space-1, 4px) var(--space-2, 8px);
    font-size: var(--text-xs, 11px);
    font-weight: 500;
    color: var(--accent, #0071E3);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm, 6px);
    cursor: pointer;
    transition: background var(--duration-fast, 150ms) var(--ease-default);
}

.document-chunk__view-source:hover {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
}

.document-chunk__view-source svg {
    color: currentColor;
}

.document-chunk__content {
    font-size: var(--text-sm, 13px);
    line-height: 1.6;
    color: var(--text-primary, #1D1D1F);
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Highlighted chunk (when navigating from citation) */
.document-chunk.is-highlighted {
    border-left-color: var(--success, #34C759);
    background: var(--success-subtle, rgba(52, 199, 89, 0.08));
    animation: chunk-highlight-pulse 2s ease-out;
}

@keyframes chunk-highlight-pulse {
    0% {
        box-shadow: 0 0 0 4px var(--success-subtle, rgba(52, 199, 89, 0.2));
    }
    100% {
        box-shadow: 0 0 0 0 transparent;
    }
}

/* Dark theme for document viewer */
[data-theme="dark"] .document-chunk {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .document-chunk__header {
    border-bottom-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .document-chunk__content {
    color: var(--text-primary, #F5F5F7);
}

[data-theme="dark"] .document-chunk.is-highlighted {
    background: rgba(52, 199, 89, 0.12);
}