/* CSS Variables for theming */
:root {
    /* Dark theme (default) */
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #6a6a6a;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --border: #2a2a4a;
    --message-user-bg: #0f3460;
    --message-assistant-bg: #1f2937;
    --input-bg: #16213e;
    --button-bg: #0f3460;
    --button-hover: #1a4a7a;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --code-bg: #0d1117;
}

[data-theme="light"] {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #868e96;
    --accent: #e94560;
    --accent-hover: #d63851;
    --border: #dee2e6;
    --message-user-bg: #e3f2fd;
    --message-assistant-bg: #f5f5f5;
    --input-bg: #ffffff;
    --button-bg: #e9ecef;
    --button-hover: #dee2e6;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --code-bg: #f6f8fa;
}

/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
}

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

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.header-right {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

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

/* Settings Bar */
.settings-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.setting-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-group select,
.setting-group input {
    padding: 0.5rem 0.75rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    min-width: 150px;
}

.setting-group input[type="number"] {
    min-width: 80px;
}

.setting-group select:focus,
.setting-group input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
}

.messages {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Message styles */
.message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
    padding: 1rem;
    border-radius: 1rem;
    position: relative;
}

.message.user {
    align-self: flex-end;
    background-color: var(--message-user-bg);
    border-bottom-right-radius: 0.25rem;
}

.message.assistant {
    align-self: flex-start;
    background-color: var(--message-assistant-bg);
    border-bottom-left-radius: 0.25rem;
}

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

.message-role {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.message-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.message-content {
    color: var(--text-primary);
    word-wrap: break-word;
}

.message-content p {
    margin-bottom: 0.5rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 0.5rem 0;
}

.message-content code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.message-content :not(pre) > code {
    background-color: var(--code-bg);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
}

.message-content ul,
.message-content ol {
    margin-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.message-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

.message-image {
    max-width: 300px;
    max-height: 300px;
    border-radius: 0.5rem;
    margin-top: 0.5rem;
}

/* Streaming indicator */
.streaming-indicator {
    display: inline-block;
    width: 0.5rem;
    height: 1rem;
    background-color: var(--accent);
    margin-left: 0.25rem;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Image Preview */
.image-preview {
    padding: 0.5rem 1.5rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.image-preview-content {
    position: relative;
    display: inline-block;
}

.image-preview img {
    max-height: 100px;
    max-width: 150px;
    border-radius: 0.5rem;
    object-fit: cover;
}

.remove-image-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--error);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
}

/* Input Area */
.input-area {
    padding: 1rem 1.5rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 0.5rem;
}

.input-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

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

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

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

.input-btn.recording {
    background-color: var(--error);
    color: white;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    resize: none;
    max-height: 150px;
    padding: 0.5rem;
    line-height: 1.5;
}

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

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

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.25rem;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.export-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--button-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.export-option:hover {
    background-color: var(--button-hover);
    border-color: var(--accent);
}

.export-icon {
    font-family: monospace;
    font-weight: bold;
    width: 2rem;
    text-align: center;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    padding: 2rem;
}

.empty-state h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 0.875rem;
}

/* Loading state */
.loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.loading-spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .settings-bar {
        padding: 0.5rem 1rem;
    }

    .setting-group select,
    .setting-group input {
        min-width: 100px;
    }

    .setting-group input[type="text"] {
        min-width: 120px;
    }

    .message {
        max-width: 95%;
    }

    .header {
        padding: 0.75rem 1rem;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .input-area {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .settings-bar {
        gap: 0.5rem;
    }

    .setting-group {
        flex: 1;
        min-width: 80px;
    }

    .setting-group select,
    .setting-group input {
        width: 100%;
        min-width: unset;
    }
}

/* Drag and drop overlay */
.drag-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(233, 69, 96, 0.1);
    border: 3px dashed var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    pointer-events: none;
}

.drag-overlay-text {
    font-size: 1.5rem;
    color: var(--accent);
    font-weight: 600;
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 6rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    z-index: 1001;
    animation: slideUp 0.3s ease;
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.success {
    border-left: 4px solid var(--success);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(1rem);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ============================================================
   Auth (login) page
   ============================================================ */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.auth-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 360px;
    text-align: center;
}

.auth-logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.auth-input,
.form-input {
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    padding: 0.7rem 0.9rem;
    font-size: 0.95rem;
    width: 100%;
}

.auth-input:focus,
.form-input:focus {
    outline: none;
    border-color: var(--accent);
}

.auth-btn,
.btn-primary {
    background-color: var(--accent);
    border: none;
    border-radius: 0.5rem;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.7rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.auth-btn:hover,
.btn-primary:hover {
    background-color: var(--accent-hover);
}

.auth-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.auth-error {
    color: var(--error);
    font-size: 0.85rem;
    margin-top: 0.75rem;
    min-height: 1.1rem;
}

/* ============================================================
   Admin panel
   ============================================================ */
.admin-tag {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 0.3rem;
    padding: 0.1rem 0.4rem;
    vertical-align: middle;
}

a.icon-btn { text-decoration: none; }

.admin-tabs {
    display: flex;
    gap: 0.25rem;
    padding: 0 1.5rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.admin-tab {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.admin-tab:hover { color: var(--text-primary); }

.admin-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.admin-main {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.admin-panel { display: none; }
.admin-panel.active { display: block; }

.panel-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.filters {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filters label {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.filters input {
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    color: var(--text-primary);
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
}

.filters input[type="number"] { width: 90px; }

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    padding: 1rem;
}

.card-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.card-value {
    font-size: 1.4rem;
    font-weight: 600;
}

.card-value.small { font-size: 0.9rem; font-weight: 500; }
.card-value.good { color: var(--success); }
.card-value.bad { color: var(--error); }

/* Tables */
.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table th {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table .muted { color: var(--text-secondary); }
.data-table .empty-cell { text-align: center; color: var(--text-muted); padding: 1.5rem; }
.data-table .empty-cell.bad { color: var(--error); }
.nowrap { white-space: nowrap; }
.mono { font-family: monospace; font-size: 0.8rem; }
.muted { color: var(--text-secondary); }
.small { font-size: 0.8rem; }

/* Badges */
.badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 1rem;
}

.badge.good { background-color: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge.bad { background-color: rgba(239, 68, 68, 0.15); color: var(--error); }
.badge.warn { background-color: rgba(245, 158, 11, 0.15); color: var(--warning); }

/* Buttons */
.btn-secondary {
    background-color: var(--button-bg);
    border: 1px solid var(--border);
    border-radius: 0.4rem;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.45rem 0.8rem;
    transition: all 0.2s ease;
}

.btn-secondary:hover { background-color: var(--button-hover); }
.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-link {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 0.82rem;
    padding: 0;
}

.btn-link:hover { color: var(--accent-hover); text-decoration: underline; }

.btn-primary.full { width: 100%; }

/* Forms inside modal */
.form-label {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* Key reveal */
.key-result-note {
    color: var(--warning);
    font-size: 0.82rem;
    margin-bottom: 0.5rem;
}

.key-result {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.6rem 0.75rem;
    margin-bottom: 0.75rem;
}

.key-result code {
    font-family: monospace;
    font-size: 0.85rem;
    word-break: break-all;
    flex: 1;
}

/* Usage breakdown */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.usage-block {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    padding: 1rem;
}

.usage-block h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.bar-chart { display: flex; flex-direction: column; gap: 0.4rem; }

.bar-row {
    display: grid;
    grid-template-columns: 90px 1fr 70px;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
}

.bar-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
}

.bar-track {
    background-color: var(--bg-tertiary);
    border-radius: 1rem;
    height: 0.55rem;
    overflow: hidden;
}

.bar-fill {
    display: block;
    height: 100%;
    background-color: var(--accent);
    border-radius: 1rem;
}

.bar-value { text-align: right; color: var(--text-primary); }

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}