:root {
    --bg-primary: #f6f8fb;
    --bg-secondary: #f9fbff;
    --bg-card: #ffffff;
    --text-primary: #1b2232;
    --text-secondary: #5e6880;
    --accent: #005fcc;
    --accent-hover: #024a9f;
    --danger: #b12626;
    --success: #187a45;
    --warning: #b76a00;
    --border: #d5dff0;
    --sidebar-width: 220px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background:
        radial-gradient(75rem 25rem at 20% -10%, #e8f2ff, transparent 60%),
        linear-gradient(180deg, #fcfdff 0%, var(--bg-primary) 80%);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 10;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 18px;
    color: var(--accent);
}

.nav-links {
    list-style: none;
    padding: 10px 0;
    flex: 1;
}

.nav-link {
    display: block;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(79, 140, 255, 0.1);
    border-left: 3px solid var(--accent);
}

/* 2026-04-26: nav 섹션 그룹 라벨 — sidebar 가독성 향상 */
.nav-section-label {
    list-style: none;
    padding: 12px 20px 4px;
    font-size: 0.72em;
    color: var(--text-secondary);
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
    border-top: 1px solid var(--border);
}
.nav-section-label:first-child {
    border-top: none;
    margin-top: 0;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-secondary);
}

.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 30px;
    max-width: 1200px;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-card {
    text-align: center;
}

.stat-card h4 {
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 10px;
}

.stat-card a {
    color: var(--accent);
    font-size: 13px;
    text-decoration: none;
}

.input-group {
    display: flex;
    gap: 10px;
}

.input-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input, select, textarea {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
}

input::placeholder, textarea::placeholder {
    color: var(--text-secondary);
}

.btn {
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-layout {
    display: flex;
    gap: 20px;
    height: calc(100vh - 160px);
}

.chat-sidebar {
    width: 250px;
    flex-shrink: 0;
}

.chat-sidebar h4 {
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
}

.chat-sidebar select {
    width: 100%;
    margin-bottom: 15px;
}

.context-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    font-size: 13px;
}

.context-panel h5 {
    margin-bottom: 8px;
    color: var(--accent);
}

.context-stats {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.context-stats span {
    color: var(--text-secondary);
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

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

.message {
    margin-bottom: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
}

.user-message {
    background: rgba(79, 140, 255, 0.12);
    border: 1px solid rgba(79, 140, 255, 0.2);
    margin-left: 40px;
}

.assistant-message {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    margin-right: 40px;
}

.assistant-message h1, .assistant-message h2, .assistant-message h3 {
    margin: 12px 0 8px 0;
    font-size: 16px;
}

.assistant-message ul, .assistant-message ol {
    padding-left: 20px;
    margin: 8px 0;
}

.assistant-message code {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.assistant-message pre {
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 8px 0;
}

.system-message {
    background: rgba(255, 165, 2, 0.08);
    border: 1px solid rgba(255, 165, 2, 0.15);
    color: var(--text-secondary);
    font-size: 13px;
}

.system-message ul {
    padding-left: 20px;
    margin-top: 8px;
}

.system-message li {
    margin: 4px 0;
}

.typing-indicator::after {
    content: '...';
    animation: typing 1s infinite;
}

@keyframes typing {
    0%, 100% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
}

.chat-input-area {
    display: flex;
    gap: 10px;
    padding: 15px;
    border-top: 1px solid var(--border);
}

.chat-input-area textarea {
    flex: 1;
    resize: none;
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.report-date {
    color: var(--text-secondary);
    font-size: 13px;
}

.report-body {
    line-height: 1.7;
    font-size: 14px;
}

.report-body h1, .report-body h2, .report-body h3 {
    margin: 16px 0 8px 0;
}

.report-body h1 { font-size: 20px; }
.report-body h2 { font-size: 17px; color: var(--accent); }
.report-body h3 { font-size: 15px; }

.report-body ul, .report-body ol {
    padding-left: 24px;
    margin: 8px 0;
}

.report-body li {
    margin: 4px 0;
}

.report-body strong {
    color: var(--accent);
}

.report-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 13px;
}

.report-body th, .report-body td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
}

.report-body th {
    background: var(--bg-secondary);
    color: var(--accent);
    font-weight: 600;
}

.report-body tr:nth-child(even) {
    background: rgba(79, 140, 255, 0.03);
}

.report-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.assistant-message table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0;
    font-size: 13px;
}

.assistant-message th, .assistant-message td {
    border: 1px solid var(--border);
    padding: 6px 10px;
    text-align: left;
}

.assistant-message th {
    background: var(--bg-primary);
    color: var(--accent);
    font-weight: 600;
}

.past-report-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: color 0.2s;
}

.past-report-item:hover {
    color: var(--accent);
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-style: italic;
}

.error {
    color: var(--danger);
}

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 1rem 2.5rem rgba(16, 24, 40, 0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 6px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-card h3 {
    margin-bottom: 20px;
    font-size: 18px;
}

.auth-field {
    margin-bottom: 16px;
}

.auth-field label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.auth-field input {
    width: 100%;
}

.auth-btn {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    margin-top: 8px;
}

.auth-switch {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--accent);
    text-decoration: none;
    margin-left: 4px;
}

.auth-error {
    background: #fff2f2;
    border: 1px solid #e4b9b9;
    color: var(--danger);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

.auth-success {
    background: #edf9f2;
    border: 1px solid #b7e0c8;
    color: var(--success);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

.template-card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.template-pick-card {
    display: grid;
    gap: 6px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fbfdff;
    padding: 10px;
    cursor: pointer;
}

.template-pick-card:hover,
.template-pick-card.active {
    border-color: #8bb8f6;
    background: #eef6ff;
}

.template-pick-title {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: baseline;
    font-size: 0.9em;
    font-weight: 700;
}

.template-pick-id {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    color: var(--text-secondary);
    font-size: 0.82em;
    white-space: nowrap;
}

.template-pick-purpose {
    color: var(--text-secondary);
    font-size: 0.84em;
    line-height: 1.45;
}

.template-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.template-badge {
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--text-secondary);
    padding: 2px 7px;
    font-size: 0.76em;
}

.template-detail-panel {
    margin-top: 10px;
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

.template-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.template-chain {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.82em;
}

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    .sidebar-header h2, .nav-link, .sidebar-footer {
        display: none;
    }
    .content {
        margin-left: 60px;
        padding: 15px;
    }
    .grid-3 {
        grid-template-columns: 1fr;
    }
    .chat-layout {
        flex-direction: column;
        height: auto;
    }
    .chat-sidebar {
        width: 100%;
    }
    .input-row {
        flex-direction: column;
    }
    .template-card-grid,
    .template-detail-grid {
        grid-template-columns: 1fr;
    }
}