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

:root {
    --bg-color: #f5f7fa;
    --text-color: #333;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --header-bg: #f8fafc;
    --code-bg: #f8fafc;
    --primary-color: #4f46e5;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #dc2626;
    --info-color: #0ea5e9;
    --surface-glass: rgba(255, 255, 255, 0.85);
    --surface-glass-soft: rgba(255, 255, 255, 0.7);
    --surface-glass-strong: rgba(255, 255, 255, 0.8);
    --surface-border: rgba(148, 163, 184, 0.3);
    --surface-shadow: rgba(15, 23, 42, 0.25);
    --surface-highlight: rgba(248, 250, 252, 0.7);
    --reasoning-entry-bg: rgba(248, 250, 252, 0.8);
    --inline-code-bg: rgba(15, 23, 42, 0.08);
    --pre-bg: rgba(15, 23, 42, 0.08);
    --bg-gradient-top: rgba(99, 102, 241, 0.15);
    --bg-gradient-bottom: rgba(14, 165, 233, 0.12);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-color: #e2e8f0;
    --card-bg: #1e293b;
    --border-color: #334155;
    --header-bg: #1e293b;
    --code-bg: #0f172a;
    --primary-color: #6366f1;
    --secondary-color: #94a3b8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #0ea5e9;
    --surface-glass: rgba(30, 41, 59, 0.9);
    --surface-glass-soft: rgba(30, 41, 59, 0.85);
    --surface-glass-strong: rgba(30, 41, 59, 0.92);
    --surface-border: rgba(71, 85, 105, 0.45);
    --surface-shadow: rgba(8, 47, 73, 0.35);
    --surface-highlight: rgba(15, 23, 42, 0.75);
    --reasoning-entry-bg: rgba(15, 23, 42, 0.85);
    --inline-code-bg: rgba(148, 163, 184, 0.15);
    --pre-bg: rgba(15, 23, 42, 0.65);
    --bg-gradient-top: rgba(99, 102, 241, 0.25);
    --bg-gradient-bottom: rgba(14, 165, 233, 0.18);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: radial-gradient(circle at top, var(--bg-gradient-top), transparent 45%),
                radial-gradient(circle at bottom, var(--bg-gradient-bottom), transparent 40%),
                var(--bg-color);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px 48px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding: 24px 28px;
    border-radius: 16px;
    background: var(--surface-glass-strong);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(12px);
    box-shadow: 0 20px 40px -24px var(--surface-shadow);
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
}

.header-title {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 560px;
}

.header-subtitle {
    font-size: 0.95rem;
    color: var(--secondary-color);
}

.controls {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: #4338ca;
    transform: translateY(-1px);
}


.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
    transform: translateY(-1px);
}

.btn-clear {
    background: var(--error-color);
    color: white;
}

.btn-clear:hover {
    background: #dc2626;
    transform: translateY(-1px);
}


/* Theme Selector */
.theme-selector {
    position: relative;
}

.theme-dropdown {
    appearance: none;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 40px 12px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTYiIGhlaWdodD0iMTYiIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHBhdGggZD0iTTYgOUwxMiAxNUwxOCA5IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjIiIHN0cm9rZS1saW5lY2FwPSJyb3VuZCIgc3Ryb2tlLWxpbmVqb2luPSJyb3VuZCIvPgo8L3N2Zz4K');
    background-repeat: no-repeat;
    background-position: right 12px center;
}


.theme-dropdown:hover {
    background-color: #4338ca;
    transform: translateY(-1px);
}


.theme-dropdown:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}


.theme-dropdown option {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 8px 12px;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    background: var(--card-bg);
    transition: all 0.3s ease;
    cursor: pointer;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: var(--header-bg);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.drop-icon {
    color: var(--secondary-color);
}

.drop-zone p {
    font-size: 16px;
    color: var(--text-color);
    opacity: 0.8;
}

.drop-hint {
    font-size: 14px !important;
    color: var(--secondary-color) !important;
}

/* Error Message */
.error-message {
    background: var(--card-bg);
    border: 1px solid var(--error-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--error-color);
}

.error-icon {
    font-size: 18px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    margin-left: auto;
    color: var(--error-color);
}

/* Trace Container */
.trace-container {
    background: var(--surface-glass);
    border-radius: 18px;
    box-shadow: 0 24px 48px -32px var(--surface-shadow);
    overflow: hidden;
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(18px);
}


.trace-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(14, 165, 233, 0.05));
    padding: 28px 32px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.25);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
}

.trace-header h2 {
    font-size: 1.65rem;
    font-weight: 600;
    color: var(--text-color);
}

.trace-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: stretch;
}

.stat-item {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    background: var(--surface-glass-soft);
    border: 1px solid var(--surface-border);
    border-radius: 10px;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1 1 180px;
}

.stat-icon {
    font-size: 18px;
}

.stat-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--secondary-color);
}

.stat-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-detail {
    font-size: 0.75rem;
    color: var(--secondary-color);
}

/* Conversation Flow */
.conversation-flow {
    padding: 32px;
    background: var(--surface-highlight);
}

/* Message Styles */
.message {
    margin-bottom: 28px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--surface-border);
    box-shadow: 0 18px 40px -32px var(--surface-shadow);
    background: var(--surface-glass);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    font-weight: 500;
}

.message-role {
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: var(--secondary-color);
}

.message-content {
    padding: 20px 24px 24px 24px;
}

.message-content pre {
    background: var(--code-bg);
    padding: 18px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.5;
    border: 1px solid var(--surface-border);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.reasoning-section {
    margin: 0 24px 24px;
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    background: var(--surface-glass-soft);
    overflow: hidden;
}

.reasoning-section summary {
    list-style: none;
    cursor: pointer;
    padding: 16px 20px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.reasoning-section summary::before {
    content: '🧠';
    font-size: 16px;
}

.reasoning-section summary::after {
    content: '▾';
    margin-left: auto;
    transition: transform 0.2s ease;
}

.reasoning-section summary::-webkit-details-marker {
    display: none;
}

.reasoning-section[open] summary {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(14, 165, 233, 0.06));
}

.reasoning-section[open] summary::after {
    transform: rotate(180deg);
}

.reasoning-content {
    padding: 4px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.reasoning-entry {
    padding: 16px;
    border-radius: 10px;
    border: 1px solid var(--surface-border);
    background: var(--reasoning-entry-bg);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.reasoning-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--secondary-color);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    margin: 0;
    font-weight: 600;
}

.markdown-body h1 { font-size: 1.4rem; }
.markdown-body h2 { font-size: 1.25rem; }
.markdown-body h3 { font-size: 1.1rem; }
.markdown-body h4 { font-size: 1rem; }
.markdown-body h5 { font-size: 0.95rem; }
.markdown-body h6 { font-size: 0.9rem; }

.markdown-body p {
    margin: 0;
    color: var(--text-color);
}

.markdown-body ul,
.markdown-body ol {
    margin: 0 0 0 1rem;
    padding-left: 1rem;
    display: grid;
    gap: 6px;
}

.markdown-body code {
    background: var(--inline-code-bg);
    border-radius: 6px;
    padding: 2px 6px;
    font-size: 0.9em;
}

.markdown-body pre {
    background: var(--pre-bg);
    border-radius: 10px;
    padding: 16px;
    overflow-x: auto;
    font-size: 13px;
    border: 1px solid var(--surface-border);
}

.markdown-body a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Role-specific styling */
.message.system .message-header {
    background: var(--header-bg);
}

.message.system .message-icon {
    background: var(--info-color);
    color: white;
}

.message.user .message-header {
    background: var(--header-bg);
}

.message.user .message-icon {
    background: var(--primary-color);
    color: white;
}

.message.assistant .message-header {
    background: var(--header-bg);
}

.message.assistant .message-icon {
    background: var(--success-color);
    color: white;
}

.message.tool .message-header {
    background: var(--header-bg);
}

.message.tool .message-icon {
    background: var(--warning-color);
    color: white;
}

/* Tools Section */
.tools-section {
    margin-bottom: 24px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.tools-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
}

.tools-header-content {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tools-icon {
    font-size: 16px;
}

.tools-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.tool-count {
    font-size: 12px;
    color: var(--secondary-color);
    background: var(--header-bg);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.tools-list {
    padding: 0;
}

.tool-item {
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.tool-item:last-child {
    border-bottom: none;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    cursor: pointer;
    background: var(--card-bg);
    transition: background-color 0.2s ease;
}

.tool-header:hover {
    background: var(--header-bg);
}

.tool-name {
    font-family: 'Monaco', 'Menlo', monospace;
    font-weight: 600;
    color: var(--text-color);
    font-size: 14px;
}

.tool-description-inline {
    color: var(--secondary-color);
    font-size: 13px;
    line-height: 1.4;
    margin-left: 8px;
    flex: 1;
}

.tool-content {
    display: none;
    padding: 20px;
    background: var(--code-bg);
    border-top: 1px solid var(--border-color);
}

.tool-item.expanded .tool-content {
    display: block;
}

.tool-item.expanded .expand-icon {
    transform: rotate(90deg);
}

.tool-section {
    margin-bottom: 20px;
}

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

.tool-section h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-section p {
    color: var(--text-color);
    line-height: 1.5;
    margin: 0;
}

.tool-inputs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 12px;
    background: var(--card-bg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.input-name {
    font-family: 'Monaco', 'Menlo', monospace;
    font-weight: 500;
    color: var(--success-color);
    font-size: 13px;
    white-space: nowrap;
    min-width: fit-content;
}

.input-description {
    color: var(--text-color);
    font-size: 13px;
    line-height: 1.4;
    word-break: break-word;
}

/* Tool Call Styles */
.tool-calls {
    margin-top: 16px;
}

.tool-call {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 12px;
    overflow: hidden;
    margin-left: 16px;
    margin-right: 16px;
}

.tool-call-header {
    background: var(--header-bg);
    padding: 12px 20px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-call-header:hover {
    background: var(--border-color);
    opacity: 0.8;
}

.expand-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.tool-call.expanded .expand-icon {
    transform: rotate(90deg);
}

.tool-call-content {
    display: none;
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background: var(--card-bg);
}

.tool-call.expanded .tool-call-content {
    display: block;
}

.tool-input, .tool-output {
    margin-bottom: 16px;
}

.tool-input h4, .tool-output h4 {
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-input pre, .tool-output pre {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 12px;
    font-size: 12px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Expandable Output */
.expandable-output {
    position: relative;
}

.expand-button {
    background: var(--header-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 12px;
    color: var(--secondary-color);
    cursor: pointer;
    margin-top: 8px;
    transition: background-color 0.2s;
}

.expand-button:hover {
    background: var(--border-color);
}

/* Tool Call Inline Arguments */
.function-call {
    font-family: 'Monaco', 'Menlo', monospace;
    word-break: break-word;
    line-height: 1.4;
}

.arg-name {
    color: var(--success-color);
    font-weight: 500;
}

.arg-value {
    color: var(--error-color);
}


/* Token Usage */
.token-usage {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    background: var(--header-bg);
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--secondary-color);
    border: 1px solid var(--border-color);
}

/* Enhanced Responsive Design */
@media (max-width: 1024px) {
    .container {
        max-width: 100%;
        padding: 16px;
    }

    .header h1 {
        font-size: 1.75rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 12px;
    }

    .header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
        text-align: center;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .controls {
        justify-content: center;
        flex-wrap: wrap;
    }

    .trace-header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
        text-align: center;
    }

    .trace-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 12px;
    }

    .message-header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .message-meta {
        justify-content: center;
        flex-wrap: wrap;
    }

    .tool-call-header {
        padding: 12px 16px;
        font-size: 13px;
    }

    .function-call {
        word-break: break-word;
    }

    .drop-zone {
        padding: 40px 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 8px;
    }

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

    .controls {
        gap: 8px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }

    .theme-dropdown {
        padding: 10px 32px 10px 12px;
        font-size: 13px;
    }

    .message-content {
        padding: 12px 16px 16px 16px;
    }

    .message-content pre {
        font-size: 12px;
        padding: 12px;
    }

    .tool-call-header {
        padding: 10px 12px;
        font-size: 12px;
    }

    .tool-input pre, .tool-output pre {
        font-size: 11px;
        padding: 10px;
    }

    .drop-zone {
        padding: 30px 10px;
    }

    .drop-zone p {
        font-size: 14px;
    }
}

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

.message {
    animation: fadeIn 0.3s ease;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
}

.modal-body {
    padding: 24px;
}

.modal-body textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    background: var(--code-bg);
    color: var(--text-color);
    resize: vertical;
    min-height: 300px;
}

.modal-body textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    background: var(--header-bg);
    border-top: 1px solid var(--border-color);
}

/* Loading state */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    color: var(--secondary-color);
}

.loading::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 12px;
}

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