/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-hover: #2a2a2a;
    --bg-active: #333333;

    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #707070;

    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);

    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;

    --border-color: #2a2a2a;
    --border-light: #3a3a3a;

    --sidebar-width: 280px;
    --input-max-height: 200px;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ===== IP Block Overlay ===== */
.ip-block-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ip-block-overlay.hidden {
    display: none;
}

.ip-block-content {
    text-align: center;
    padding: 3rem;
}

.ip-block-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.ip-block-content h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.ip-block-content p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.ip-info {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-family: monospace;
}

/* ===== App Container ===== */
.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.new-chat-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.sidebar-search {
    padding: 0.75rem 1rem;
}

.sidebar-search input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.sidebar-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.sidebar-search input::placeholder {
    color: var(--text-tertiary);
}

/* ===== Conversations List ===== */
.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.conversations-list::-webkit-scrollbar {
    width: 6px;
}

.conversations-list::-webkit-scrollbar-track {
    background: transparent;
}

.conversations-list::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.conversation-item.active {
    background: var(--bg-active);
}

.conversation-icon {
    width: 20px;
    height: 20px;
    margin-right: 0.75rem;
    opacity: 0.7;
}

.conversation-title {
    flex: 1;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-menu-btn {
    opacity: 0;
    padding: 0.25rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.conversation-item:hover .conversation-menu-btn {
    opacity: 1;
}

.conversation-menu-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.conversation-date {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.25rem;
}

/* Date Groups */
.date-group {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Sidebar Footer ===== */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.endolens-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.badge-logo {
    font-size: 1.25rem;
    color: var(--accent-primary);
}

.norma-dura-tag {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    letter-spacing: 0.05em;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.toggle-sidebar-btn {
    display: none;
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 100;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
}

/* ===== Chat Container ===== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.chat-container::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

/* ===== Welcome Screen ===== */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
}

.welcome-screen.hidden {
    display: none;
}

.welcome-logo {
    margin-bottom: 1.5rem;
}

.logo-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    box-shadow: 0 0 40px var(--accent-glow);
}

.welcome-screen h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.welcome-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.welcome-description {
    max-width: 500px;
    color: var(--text-tertiary);
    margin-bottom: 2rem;
}

.welcome-features {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.feature-icon {
    font-size: 1.5rem;
}

.feature span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Messages Container ===== */
.messages-container {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
}

.messages-container.hidden {
    display: none;
}

/* ===== Message ===== */
.message {
    display: flex;
    gap: 1rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--accent-primary);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.message-author {
    font-weight: 600;
    font-size: 0.95rem;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.message-language {
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    color: var(--text-secondary);
}

.message-text {
    color: var(--text-primary);
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ===== Message Files ===== */
.message-files {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.message-file {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.message-file-icon {
    font-size: 1rem;
}

.message-file-name {
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-file-size {
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

/* ===== EndoLens Response ===== */
.endolens-response {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-top: 0.75rem;
}

.endolens-signature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.signature-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.signature-badge.stable {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.signature-badge.moderate {
    background: rgba(234, 179, 8, 0.2);
    color: var(--warning);
    border: 1px solid rgba(234, 179, 8, 0.3);
}

.signature-badge.dynamic {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.stability-label {
    font-size: 0.85rem;
    font-weight: 500;
}

.stability-label.stable { color: var(--success); }
.stability-label.moderate { color: var(--warning); }
.stability-label.dynamic { color: var(--danger); }

.confidence-value {
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.endolens-natural-response {
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.endolens-phonetic {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent-secondary);
    background: var(--bg-tertiary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.endolens-eseries {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.eseries-item {
    text-align: center;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.eseries-label {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.eseries-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

/* ===== Input Area ===== */
.input-area {
    padding: 1rem 1.5rem 1.5rem;
    background: linear-gradient(transparent, var(--bg-primary) 20%);
}

.input-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.file-upload-area {
    display: none;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.file-upload-area.has-files {
    display: block;
}

.uploaded-files {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.uploaded-file {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.uploaded-file-icon {
    font-size: 1rem;
}

.uploaded-file-name {
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.uploaded-file-remove {
    padding: 0.15rem;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    line-height: 1;
}

.uploaded-file-remove:hover {
    color: var(--danger);
}

.input-row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
}

.attach-btn, .send-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.send-btn {
    background: var(--accent-primary);
    color: white;
}

.send-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
}

.send-btn:not(:disabled):hover {
    background: var(--accent-secondary);
}

#message-input {
    flex: 1;
    min-height: 40px;
    max-height: var(--input-max-height);
    padding: 0.6rem 0;
    background: none;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    resize: none;
    overflow-y: auto;
}

#message-input:focus {
    outline: none;
}

#message-input::placeholder {
    color: var(--text-tertiary);
}

.input-footer {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.language-indicator {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

#detected-language {
    color: var(--accent-secondary);
    font-weight: 500;
}

/* ===== Context Menu ===== */
.context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    min-width: 160px;
    z-index: 1000;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.context-menu.hidden {
    display: none;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.context-menu-item:hover {
    background: var(--bg-hover);
}

.context-menu-item.danger {
    color: var(--danger);
}

.context-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 90%;
    max-width: 400px;
}

.modal-content h3 {
    margin-bottom: 1rem;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.modal-content input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.btn-primary, .btn-secondary, .btn-danger {
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--accent-primary);
    border: none;
    color: white;
}

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

.btn-secondary {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-danger {
    background: var(--danger);
    border: none;
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 500;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .toggle-sidebar-btn {
        display: flex;
    }

    .welcome-features {
        gap: 1rem;
    }

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

    .input-area {
        padding: 0.75rem;
    }
}

/* ===== Drag & Drop ===== */
.drag-over {
    border-color: var(--accent-primary) !important;
    background: rgba(99, 102, 241, 0.1) !important;
}

/* ===== Loading State ===== */
.message.loading .message-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.loading-dots {
    display: flex;
    gap: 4px;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ===== Empty State ===== */
.empty-conversations {
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-tertiary);
}

.empty-conversations-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

/* ===== NORMA DURA Dual Output ===== */

/* Structural Report Section */
.structural-report {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.structural-report .report-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.structural-report .report-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-secondary);
    padding: 0.2rem 0.5rem;
    background: rgba(99, 102, 241, 0.15);
    border-radius: 4px;
}

/* Signature in structural report */
.structural-report .signature-display {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-left: auto;
}

/* E-series in structural report */
.structural-report .eseries-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.structural-report .eseries-cell {
    text-align: center;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.structural-report .eseries-cell .label {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.structural-report .eseries-cell .value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-primary);
}

/* Patterns section */
.structural-report .patterns-section {
    margin-bottom: 1rem;
}

.structural-report .patterns-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.structural-report .pattern-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.structural-report .pattern-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.structural-report .pattern-tag.invariant {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.structural-report .pattern-tag.divergence {
    background: rgba(234, 179, 8, 0.15);
    border: 1px solid rgba(234, 179, 8, 0.3);
    color: var(--warning);
}

.structural-report .pattern-tag.void {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.structural-report .pattern-tag.limit {
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: #a78bfa;
}

/* Trace section */
.structural-report .trace-section {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.structural-report .trace-title {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.structural-report .trace-list {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.structural-report .trace-item {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem 0;
    border-bottom: 1px dashed var(--border-color);
}

.structural-report .trace-item:last-child {
    border-bottom: none;
}

.structural-report .trace-transform {
    color: var(--accent-secondary);
    font-weight: 500;
    min-width: 50px;
}

.structural-report .trace-arrow {
    color: var(--text-tertiary);
}

.structural-report .trace-result {
    color: var(--text-primary);
    flex: 1;
}

/* Explanatory Section */
.endolens-explanation {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    position: relative;
}

.endolens-explanation::before {
    content: 'SALIDA EXPLICATIVA';
    position: absolute;
    top: -0.6rem;
    left: 1rem;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    background: var(--bg-primary);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
}

.endolens-explanation .explanation-text {
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.endolens-explanation .explanation-confidence {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.endolens-explanation .confidence-bar {
    flex: 1;
    max-width: 100px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.endolens-explanation .confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--success));
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* No patterns detected state */
.structural-report .no-patterns {
    color: var(--text-tertiary);
    font-style: italic;
    font-size: 0.8rem;
    padding: 0.5rem;
    text-align: center;
}

/* Toggle details button */
.structural-report .toggle-details-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.6rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.structural-report .toggle-details-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.structural-report .expand-icon {
    font-size: 0.6rem;
    transition: transform 0.2s ease;
}

.structural-report.expanded .expand-icon {
    transform: rotate(90deg);
}

/* Report details - collapsed by default */
.structural-report .report-details {
    display: none;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.structural-report.expanded .report-details {
    display: block;
}

/* Pattern groups */
.structural-report .patterns-section {
    margin-bottom: 1rem;
}

.structural-report .pattern-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.structural-report .pattern-group-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    min-width: 80px;
}

.structural-report .pattern-group .pattern-tag {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.structural-report .pattern-group.invariants .pattern-tag {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.structural-report .pattern-group.divergences .pattern-tag {
    background: rgba(234, 179, 8, 0.15);
    border: 1px solid rgba(234, 179, 8, 0.3);
    color: var(--warning);
}

.structural-report .pattern-group.voids .pattern-tag {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.structural-report .pattern-group.limits .pattern-tag {
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: #a78bfa;
}

/* Detail labels */
.structural-report .detail-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
    display: block;
}

/* Phonetic output */
.structural-report .phonetic-output {
    margin-bottom: 1rem;
}

.structural-report .phonetic-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent-secondary);
    display: block;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-top: 0.25rem;
}

/* Trace section */
.structural-report .trace-section {
    margin-top: 1rem;
}

.structural-report .trace-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.25rem;
}

.structural-report .trace-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.35rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 0.75rem;
}

.structural-report .trace-id {
    color: var(--accent-primary);
    font-weight: 600;
    min-width: 45px;
}

.structural-report .trace-name {
    color: var(--text-secondary);
}

/* Explanation section */
.endolens-explanation {
    margin-top: 0.75rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    position: relative;
}

.endolens-explanation .explanation-header {
    margin-bottom: 0.75rem;
}

.endolens-explanation .explanation-label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.15);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
}

.endolens-explanation .explanation-text {
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Pattern to text mapping */
.endolens-explanation .explanation-map {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(99, 102, 241, 0.2);
}

.endolens-explanation .map-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.endolens-explanation .map-pattern {
    color: var(--accent-secondary);
    font-weight: 600;
}

.endolens-explanation .map-type {
    font-size: 0.6rem;
    padding: 0.1rem 0.3rem;
    border-radius: 2px;
}

.endolens-explanation .map-type.invariant {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.endolens-explanation .map-type.divergence {
    background: rgba(234, 179, 8, 0.2);
    color: var(--warning);
}

.endolens-explanation .map-type.void {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.endolens-explanation .map-type.limit {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
}

/* Responsive for dual output */
@media (max-width: 768px) {
    .structural-report .eseries-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .structural-report .pattern-list {
        flex-direction: column;
    }

    .structural-report .pattern-group {
        flex-direction: column;
        align-items: flex-start;
    }
}