/* Lucid — Brainstorming Sparring Partner */

:root {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fafafa;
    --bg-header: #e8eaf6;
    --bg-sidebar: #ffffff;
    --bg-button: #fff;
    --bg-button-hover: #f0f0f0;
    --bg-accent: #5c6bc0;
    --bg-accent-hover: #3f51b5;
    --bg-danger: #ef5350;
    --bg-danger-hover: #d32f2f;

    --text-primary: #1a1a1a;
    --text-secondary: #555;
    --text-tertiary: #888;
    --text-inverse: #ffffff;
    --text-accent: #3f51b5;

    --border-primary: #ddd;
    --border-secondary: #e0e0e0;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.12);

    --challenge-clarification: #26c6da;
    --challenge-socratic: #7c4dff;
    --challenge-devils: #ff5252;
    --challenge-structural: #ff9100;
    --challenge-tension: #ab47bc;
    --challenge-evidence-gap: #29b6f6;
    --challenge-contradicting: #ef5350;
    --challenge-methodology: #66bb6a;

    --recording-red: #ef5350;
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #252525;
    --bg-header: #1a1a2e;
    --bg-sidebar: #1a1a1a;
    --bg-button: #2a2a2a;
    --bg-button-hover: #3a3a3a;
    --bg-accent: #7986cb;
    --bg-accent-hover: #5c6bc0;
    --bg-danger: #ef5350;
    --bg-danger-hover: #d32f2f;

    --text-primary: #e0e0e0;
    --text-secondary: #aaa;
    --text-tertiary: #666;
    --text-inverse: #ffffff;
    --text-accent: #9fa8da;

    --border-primary: #333;
    --border-secondary: #2a2a2a;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.4);

    --challenge-socratic: #b388ff;
    --challenge-devils: #ff8a80;
    --challenge-structural: #ffab40;
    --challenge-evidence-gap: #4fc3f7;
    --challenge-contradicting: #ff8a80;
    --challenge-methodology: #81c784;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

/* ---- Layout ---- */

.app-layout {
    display: flex;
    height: 100vh;
}

/* ---- Sidebar ---- */

.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-accent);
}

.sidebar-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.25rem;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: background 0.2s;
}

.btn-icon:hover {
    background: var(--bg-button-hover);
    color: var(--text-primary);
}

.thread-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.thread-item {
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}

.thread-item:hover {
    background: var(--bg-tertiary);
}

.thread-item.active {
    background: var(--bg-tertiary);
    border-left-color: var(--bg-accent);
}

.thread-item-title {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.thread-item-meta {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 0.15rem;
}

/* ---- Main Area ---- */

.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

#thread-view {
    flex: 1;
    flex-direction: column;
    min-height: 0;
}

/* Empty state */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    gap: 1rem;
}

.empty-state-icon {
    font-size: 3rem;
    opacity: 0.4;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Thread header */
.thread-header {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    gap: 1rem;
}

.thread-title {
    font-size: 1.15rem;
    font-weight: 600;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.thread-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-shrink: 0;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.toggle-label input[type="checkbox"] {
    cursor: pointer;
}

.mode-select {
    padding: 0.35rem 0.5rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-button);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

.mode-select:focus {
    outline: none;
    border-color: var(--bg-accent);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-button);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s;
}

.btn-sm:hover {
    background: var(--bg-button-hover);
}

.btn-danger {
    color: var(--bg-danger);
    border-color: var(--bg-danger);
}

.btn-danger:hover {
    background: var(--bg-danger);
    color: var(--text-inverse);
}

/* Thread content — scrollable */
.thread-content {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Recording bar (pinned bottom) */
.recording-bar {
    border-top: 1px solid var(--border-secondary);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

/* Recording area */
.recording-area {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
}

.webcam-preview {
    width: 120px;
    height: 90px;
    border-radius: 6px;
    background: #000;
    object-fit: cover;
    display: none;
}

.webcam-preview.active {
    display: block;
}

.record-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 3px solid var(--border-primary);
    background: var(--bg-button);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.record-btn:hover {
    border-color: var(--recording-red);
    transform: scale(1.05);
}

.record-btn.recording {
    border-color: var(--recording-red);
    background: var(--recording-red);
    animation: pulse 1.5s ease-in-out infinite;
}

.record-btn-inner {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--recording-red);
    transition: all 0.2s;
}

.record-btn.recording .record-btn-inner {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    background: var(--text-inverse);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 83, 80, 0.4); }
    50% { box-shadow: 0 0 0 12px rgba(239, 83, 80, 0); }
}

.recording-status {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.recording-status.active {
    color: var(--recording-red);
    font-weight: 500;
}

.recording-status.error {
    color: var(--bg-danger);
    font-weight: 500;
}

/* Processing spinner */
.processing-overlay {
    display: none;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
}

.processing-overlay.active {
    display: flex;
}

.processing-overlay.active ~ .recording-area {
    display: none;
}

.processing-overlay.active ~ .transcript-review {
    display: none;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-primary);
    border-top-color: var(--bg-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Thesis section */
.thesis-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.thesis-section h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 1rem;
}

.thesis-body {
    line-height: 1.7;
}

.thesis-body h1 { font-size: 1.4rem; margin: 1rem 0 0.5rem; }
.thesis-body h2 { font-size: 1.15rem; margin: 0.75rem 0 0.5rem; text-transform: none; letter-spacing: normal; color: var(--text-primary); }
.thesis-body h3 { font-size: 1rem; margin: 0.5rem 0 0.25rem; }
.thesis-body p { margin-bottom: 0.75rem; }
.thesis-body ul, .thesis-body ol { margin: 0.5rem 0 0.75rem 1.5rem; }
.thesis-body li { margin-bottom: 0.25rem; }
.thesis-body blockquote {
    border-left: 3px solid var(--bg-accent);
    padding-left: 1rem;
    color: var(--text-secondary);
    margin: 0.5rem 0;
}
.thesis-body code {
    background: var(--bg-tertiary);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}
.thesis-body strong { font-weight: 600; }

.thesis-empty {
    color: var(--text-tertiary);
    font-style: italic;
    text-align: center;
    padding: 2rem 0;
}

/* Challenges section */
.challenges-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.challenges-section h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
}

.challenge-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: 8px;
    padding: 1rem 1rem 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--border-primary);
}

.challenge-card.responding {
    border-color: var(--bg-accent);
    box-shadow: 0 0 0 1px var(--bg-accent), var(--shadow-sm);
}

.challenge-card.responding .challenge-respond-btn {
    background: var(--bg-accent);
    color: var(--text-inverse);
    border-color: var(--bg-accent);
}

.challenge-card[data-category="clarification"] {
    border-left-color: var(--challenge-clarification);
}
.challenge-card[data-category="socratic"] {
    border-left-color: var(--challenge-socratic);
}
.challenge-card[data-category="devils_advocate"] {
    border-left-color: var(--challenge-devils);
}
.challenge-card[data-category="structural"] {
    border-left-color: var(--challenge-structural);
}
.challenge-card[data-category="tension"] {
    border-left-color: var(--challenge-tension);
}
.challenge-card[data-category="evidence_gap"] {
    border-left-color: var(--challenge-evidence-gap);
}
.challenge-card[data-category="contradicting_evidence"] {
    border-left-color: var(--challenge-contradicting);
}
.challenge-card[data-category="methodology"] {
    border-left-color: var(--challenge-methodology);
}

.challenge-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.challenge-card[data-category="clarification"] .challenge-category {
    color: var(--challenge-clarification);
}
.challenge-card[data-category="socratic"] .challenge-category {
    color: var(--challenge-socratic);
}
.challenge-card[data-category="devils_advocate"] .challenge-category {
    color: var(--challenge-devils);
}
.challenge-card[data-category="structural"] .challenge-category {
    color: var(--challenge-structural);
}
.challenge-card[data-category="tension"] .challenge-category {
    color: var(--challenge-tension);
}
.challenge-card[data-category="evidence_gap"] .challenge-category {
    color: var(--challenge-evidence-gap);
}
.challenge-card[data-category="contradicting_evidence"] .challenge-category {
    color: var(--challenge-contradicting);
}
.challenge-card[data-category="methodology"] .challenge-category {
    color: var(--challenge-methodology);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.35rem;
}

.challenge-header .challenge-category {
    margin-bottom: 0;
}

.challenge-actions {
    display: flex;
    gap: 0.35rem;
}

.challenge-action-btn {
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-button);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 500;
}

.challenge-action-btn:hover {
    background: var(--bg-accent);
    color: var(--text-inverse);
    border-color: var(--bg-accent);
}

.challenge-action-btn:disabled {
    opacity: 0.5;
    cursor: default;
}

.challenge-dismiss-btn:hover {
    background: var(--bg-danger);
    border-color: var(--bg-danger);
}

.challenge-pin-btn:hover {
    background: var(--challenge-clarification);
    border-color: var(--challenge-clarification);
}

/* Actioned card (pinned or dismissed) */
.challenge-card.actioned {
    opacity: 0.45;
    transition: opacity 0.3s;
}

.challenge-card.actioned .challenge-actions {
    pointer-events: none;
}

/* Dismiss popover */
.dismiss-popover {
    display: none;
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 6px;
}

.dismiss-popover.active {
    display: block;
}

.dismiss-popover-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.dismiss-reasons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
}

.dismiss-reason {
    padding: 0.25rem 0.6rem;
    font-size: 0.8rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-button);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.dismiss-reason:hover {
    background: var(--bg-danger);
    color: var(--text-inverse);
    border-color: var(--bg-danger);
}

.dismiss-custom {
    display: flex;
    gap: 0.35rem;
}

.dismiss-custom-input {
    flex: 1;
    padding: 0.3rem 0.5rem;
    font-size: 0.8rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
}

.dismiss-custom-input:focus {
    outline: none;
    border-color: var(--bg-accent);
}

.dismiss-custom-submit {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    background: var(--bg-button);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
}

.dismiss-custom-submit:hover {
    background: var(--bg-danger);
    color: var(--text-inverse);
    border-color: var(--bg-danger);
}

.challenge-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.recording-status.responding {
    color: var(--bg-accent);
    font-weight: 500;
}

/* Transcript review */
.transcript-review {
    display: none;
    padding: 0.75rem 1.5rem;
    gap: 0.5rem;
    flex-direction: column;
}

.transcript-review.active {
    display: flex;
}

.transcript-review-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.transcript-editor {
    width: 100%;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 6px;
    padding: 0.75rem;
    resize: vertical;
    min-height: 60px;
}

.transcript-editor:focus {
    outline: none;
    border-color: var(--bg-accent);
}

.transcript-review-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* Review toggle */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    width: 14px;
    height: 14px;
    cursor: pointer;
}

/* History modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
}

.modal-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.1rem;
    text-transform: none;
    letter-spacing: normal;
    color: var(--text-primary);
    margin: 0;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.25rem;
}

.history-entry {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-secondary);
}

.history-entry:last-child {
    border-bottom: none;
}

.history-entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.history-entry-meta {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.history-delete-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
}

.history-entry:hover .history-delete-btn {
    opacity: 1;
}

.history-delete-btn:hover {
    color: var(--bg-danger);
}

.history-entry-transcript {
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: 4px;
    line-height: 1.5;
}

/* New thread modal */
.new-thread-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 1.25rem;
}

.new-thread-form input {
    padding: 0.6rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    font-size: 0.95rem;
    background: var(--bg-button);
    color: var(--text-primary);
}

.new-thread-form input:focus {
    outline: none;
    border-color: var(--bg-accent);
}

.new-thread-form .form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-primary);
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    background: var(--bg-button);
    color: var(--text-primary);
    transition: background 0.2s;
}

.btn:hover {
    background: var(--bg-button-hover);
}

.btn-primary {
    background: var(--bg-accent);
    color: var(--text-inverse);
    border-color: var(--bg-accent);
}

.btn-primary:hover {
    background: var(--bg-accent-hover);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        min-width: 100%;
        height: auto;
        max-height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-primary);
    }

    .app-layout {
        flex-direction: column;
    }

    .main-area {
        height: 60vh;
    }

    .webcam-preview {
        width: 80px;
        height: 60px;
    }
}