/* ============================================================
   Dragon RAG - Page Styles
   ============================================================ */

/* --- Layout --- */

.dragon-rag-main {
    width: 100%;
    height: calc(100vh - 56px);
    margin-top: 56px;
    overflow: hidden;
}

.dragon-rag-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: 100%;
    overflow: hidden;
}

/* --- Panel Headers --- */

.dragon-rag-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    flex-shrink: 0;
}

.dragon-rag-panel-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary, #1f2937);
    margin: 0;
}

.dragon-rag-doc-count {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    background: var(--bg-tertiary, #f3f4f6);
    padding: 2px 8px;
    border-radius: 10px;
}

/* --- Documents Panel --- */

.dragon-rag-documents {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color, #e5e7eb);
    background: var(--bg-secondary, #f9fafb);
    overflow: hidden;
}

/* --- Drop Zone --- */

.dragon-rag-dropzone {
    margin: 16px;
    padding: 24px 16px;
    border: 2px dashed var(--border-color, #d1d5db);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    flex-shrink: 0;
}

.dragon-rag-dropzone:hover,
.dragon-rag-dropzone.dragover {
    border-color: var(--color-primary, #2563eb);
    background: rgba(37, 99, 235, 0.04);
}

.dragon-rag-dropzone.dragover {
    border-style: solid;
    transform: scale(1.01);
}

.dragon-rag-dropzone-icon {
    color: var(--text-tertiary, #9ca3af);
    margin-bottom: 8px;
}

.dragon-rag-dropzone-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary, #374151);
    margin: 0 0 4px;
}

.dragon-rag-dropzone-hint {
    font-size: 12px;
    color: var(--text-tertiary, #9ca3af);
    margin: 0 0 8px;
}

.dragon-rag-dropzone-formats {
    font-size: 11px;
    color: var(--text-tertiary, #9ca3af);
    background: var(--bg-tertiary, #f3f4f6);
    display: inline-block;
    padding: 2px 10px;
    border-radius: 8px;
    margin: 0;
}

.dragon-rag-file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* --- Document List --- */

.dragon-rag-doc-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 16px;
}

.dragon-rag-empty-state {
    text-align: center;
    padding: 24px 16px;
    color: var(--text-tertiary, #9ca3af);
}

.dragon-rag-empty-state p {
    margin: 0 0 4px;
    font-size: 13px;
}

.dragon-rag-empty-hint {
    font-size: 12px;
}

.dragon-rag-doc-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 4px;
    transition: background 0.15s ease;
}

.dragon-rag-doc-item:hover {
    background: var(--bg-tertiary, #f3f4f6);
}

.dragon-rag-doc-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--bg-tertiary, #f3f4f6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.dragon-rag-doc-info {
    flex: 1;
    min-width: 0;
}

.dragon-rag-doc-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary, #1f2937);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dragon-rag-doc-meta {
    font-size: 11px;
    color: var(--text-tertiary, #9ca3af);
}

.dragon-rag-doc-remove {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--text-tertiary, #9ca3af);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.15s ease;
}

.dragon-rag-doc-item:hover .dragon-rag-doc-remove {
    opacity: 1;
}

.dragon-rag-doc-remove:hover {
    color: var(--color-danger, #ef4444);
    background: rgba(239, 68, 68, 0.08);
}

/* --- Embedding Status --- */

.dragon-rag-status {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color, #e5e7eb);
    flex-shrink: 0;
}

.dragon-rag-status-bar {
    height: 4px;
    background: var(--bg-tertiary, #e5e7eb);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
}

.dragon-rag-status-fill {
    height: 100%;
    background: var(--color-primary, #2563eb);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.dragon-rag-status-text {
    font-size: 12px;
    color: var(--text-secondary, #6b7280);
    margin: 0;
}

/* --- Chat Panel --- */

.dragon-rag-chat {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary, #ffffff);
    overflow: hidden;
}

.dragon-rag-clear-btn {
    font-size: 12px;
    color: var(--text-tertiary, #9ca3af);
    background: none;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 6px;
    padding: 4px 12px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.dragon-rag-clear-btn:hover {
    color: var(--text-primary, #374151);
    border-color: var(--text-tertiary, #9ca3af);
}

/* --- Messages --- */

.dragon-rag-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.dragon-rag-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    height: 100%;
}

.dragon-rag-welcome-icon {
    margin-bottom: 16px;
    color: var(--text-tertiary, #9ca3af);
}

.dragon-rag-welcome-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary, #1f2937);
    margin: 0 0 8px;
}

.dragon-rag-welcome-text {
    font-size: 14px;
    color: var(--text-secondary, #6b7280);
    max-width: 400px;
    line-height: 1.5;
    margin: 0;
}

.dragon-rag-message {
    margin-bottom: 20px;
    max-width: 720px;
}

.dragon-rag-message--user {
    margin-left: auto;
}

.dragon-rag-message-bubble {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.dragon-rag-message--user .dragon-rag-message-bubble {
    background: var(--color-primary, #2563eb);
    color: white;
    border-bottom-right-radius: 4px;
}

.dragon-rag-message--assistant .dragon-rag-message-bubble {
    background: var(--bg-secondary, #f3f4f6);
    color: var(--text-primary, #1f2937);
    border-bottom-left-radius: 4px;
}

.dragon-rag-message-sources {
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--bg-tertiary, #f9fafb);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-secondary, #6b7280);
}

.dragon-rag-message-sources-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.dragon-rag-message-error {
    color: var(--color-error, #dc2626);
    font-style: italic;
}

/* --- Input Area --- */

.dragon-rag-input-area {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color, #e5e7eb);
    flex-shrink: 0;
}

.dragon-rag-input-row {
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.dragon-rag-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 10px;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #1f2937);
    resize: none;
    max-height: 120px;
    transition: border-color 0.2s ease;
}

.dragon-rag-input:focus {
    outline: none;
    border-color: var(--color-primary, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.dragon-rag-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.dragon-rag-send-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 10px;
    background: var(--color-primary, #2563eb);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.dragon-rag-send-btn:hover:not(:disabled) {
    background: var(--color-primary-dark, #1d4ed8);
}

.dragon-rag-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.dragon-rag-input-hint {
    font-size: 12px;
    color: var(--text-tertiary, #9ca3af);
    margin: 6px 0 0;
    padding-left: 2px;
}

/* --- Header Button --- */

.dragon-rag-header-btn {
    background: none;
    border: none;
    color: var(--text-secondary, #6b7280);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    transition: all 0.15s ease;
}

.dragon-rag-header-btn:hover {
    color: var(--text-primary, #1f2937);
    background: var(--bg-tertiary, #f3f4f6);
}

/* --- Settings Panel --- */

.dragon-rag-settings {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dragon-rag-settings[hidden] {
    display: none;
}

.dragon-rag-settings-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.dragon-rag-settings-content {
    position: relative;
    background: var(--bg-primary, #ffffff);
    border-radius: 16px;
    width: 90%;
    max-width: 480px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.dragon-rag-settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
}

.dragon-rag-settings-header h2 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}

.dragon-rag-close-btn {
    background: none;
    border: none;
    color: var(--text-tertiary, #9ca3af);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    display: flex;
    transition: all 0.15s ease;
}

.dragon-rag-close-btn:hover {
    color: var(--text-primary, #1f2937);
    background: var(--bg-tertiary, #f3f4f6);
}

.dragon-rag-settings-body {
    padding: 24px;
}

/* --- Setting Groups --- */

.dragon-rag-setting-group {
    margin-bottom: 24px;
    border: none;
    padding: 0;
}

.dragon-rag-setting-group legend {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    padding: 0;
}

.dragon-rag-setting-group label:not(.dragon-rag-radio-option) {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary, #374151);
    display: block;
    margin-bottom: 6px;
}

/* --- Radio Options --- */

.dragon-rag-radio-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 10px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.dragon-rag-radio-option:hover {
    border-color: var(--color-primary, #2563eb);
    background: rgba(37, 99, 235, 0.02);
}

.dragon-rag-radio-option input[type="radio"] {
    margin-top: 3px;
    flex-shrink: 0;
}

.dragon-rag-radio-label strong {
    display: block;
    font-size: 13px;
    color: var(--text-primary, #1f2937);
    margin-bottom: 2px;
}

.dragon-rag-radio-label span {
    font-size: 12px;
    color: var(--text-secondary, #6b7280);
    line-height: 1.4;
}

/* --- Text/Number Inputs --- */

.dragon-rag-text-input,
.dragon-rag-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #1f2937);
    transition: border-color 0.2s ease;
}

.dragon-rag-text-input:focus,
.dragon-rag-select:focus {
    outline: none;
    border-color: var(--color-primary, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.dragon-rag-number-input {
    width: 80px;
    padding: 6px 10px;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    text-align: center;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #1f2937);
}

.dragon-rag-setting-hint {
    font-size: 12px;
    color: var(--text-tertiary, #9ca3af);
    margin: 6px 0 0;
    line-height: 1.4;
}

.dragon-rag-setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
}

.dragon-rag-setting-row label {
    font-size: 13px;
    color: var(--text-primary, #374151);
    margin: 0;
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .dragon-rag-main {
        margin-top: 56px;
        height: calc(100vh - 56px);
    }

    .dragon-rag-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .dragon-rag-documents {
        border-right: none;
        border-bottom: 1px solid var(--border-color, #e5e7eb);
        max-height: 40vh;
    }

    .dragon-rag-dropzone {
        padding: 16px 12px;
        margin: 12px;
    }
}

/* --- Screen reader only --- */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}