:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1a2332;
    --muted: #5c6b7a;
    --border: #d8e0ea;
    --primary: #1f4fd6;
    --primary-hover: #173ea8;
    --danger-bg: #fdecec;
    --danger-text: #9b1c1c;
    --success-bg: #e8f7ee;
    --success-text: #166534;
    --radius: 10px;
    --shadow: 0 8px 24px rgba(26, 35, 50, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.topbar-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0.9rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-name {
    color: var(--muted);
    font-size: 0.95rem;
}

.logout-form { margin: 0; }

.main-content {
    max-width: 1080px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 3rem;
}

.page-header { margin-bottom: 1.5rem; }

.page-header h1 {
    margin: 0 0 0.35rem;
    font-size: 1.75rem;
}

.page-header p, .project-meta { color: var(--muted); margin: 0; }

.back-link {
    display: inline-block;
    margin-bottom: 0.75rem;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.95rem;
}

.project-title-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    background: #e8eefc;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.alert-success {
    background: var(--success-bg);
    color: var(--success-text);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.project-card {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.project-card:hover {
    transform: translateY(-2px);
    border-color: #b8c7e6;
}

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

.project-code {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--muted);
    letter-spacing: 0.04em;
}

.project-card h2 {
    margin: 0 0 0.5rem;
    font-size: 1.15rem;
}

.project-desc {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.35rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.panel h2 {
    margin: 0 0 0.75rem;
    font-size: 1.1rem;
}

.panel-muted {
    background: #f8fafc;
}

.roadmap-placeholder {
    margin: 0.75rem 0 0;
    padding-left: 1.2rem;
    color: var(--muted);
}

.actions-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.stats-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.stat-card {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.85rem 1.1rem;
    min-width: 120px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    color: var(--muted);
    font-size: 0.85rem;
}

.table-wrap {
    overflow-x: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: #f8fafc;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--muted);
}

.data-table tbody tr:hover {
    background: #fafbfd;
}

.data-table a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.badge-muted {
    background: #eef2f7;
    color: var(--muted);
}

.badge-action {
    background: #e0f2fe;
    color: #0369a1;
    font-size: 0.85rem;
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.recommendation-panel {
    border-left: 4px solid var(--primary);
}

.recommendation-code {
    margin: 0 0 0.5rem;
}

.recommendation-text {
    margin: 0;
    color: var(--muted);
}

.section-lead {
    margin: -0.35rem 0 1rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.task-form textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
}

.task-form select {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.field-error {
    color: var(--danger-text);
    font-size: 0.85rem;
    margin: 0.35rem 0 0;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem 1.5rem;
    margin: 0;
}

.detail-grid dt {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--muted);
    margin-bottom: 0.2rem;
}

.detail-grid dd {
    margin: 0;
    font-weight: 600;
}

.task-content {
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.6;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.section-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.section-header-row h2 {
    margin: 0;
}

.empty-state.compact {
    padding: 1.25rem;
    margin: 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

.empty-state {
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    color: var(--muted);
}

.auth-wrap {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.auth-card h1 {
    margin: 0 0 0.35rem;
    font-size: 1.5rem;
}

.auth-lead {
    margin: 0 0 1.25rem;
    color: var(--muted);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.btn {
    display: inline-block;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border);
}

.btn-block { width: 100%; }