:root {
    --primary: #2563eb;
    --danger: #dc2626;
    --success: #16a34a;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --border: #e2e8f0;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.navbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand { font-size: 1.5rem; font-weight: bold; text-decoration: none; color: var(--primary); }
.nav-links { display: flex; gap: 1rem; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text); }
.nav-links a:hover { color: var(--primary); }

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    text-decoration: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-success { background: var(--success); color: white; border-color: var(--success); }
.btn-search { background: #7c3aed; color: white; border-color: #7c3aed; }
.btn-search:hover { background: #6d28d9; }
.btn-small { padding: 0.25rem 0.5rem; font-size: 0.8rem; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0 1rem;
}

.filters {
    background: var(--card);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}
.filter-form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: end;
}
.filter-form input, .filter-form select {
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.events-list { display: grid; gap: 1rem; }
.event-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}
.event-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}
.event-header h3 { margin: 0; }
.event-header a { text-decoration: none; color: var(--text); }
.event-header a:hover { color: var(--primary); }
.event-meta p { margin: 0.25rem 0; font-size: 0.9rem; color: #64748b; }

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
}
.badge-plan { background: #dbeafe; color: #1e40af; }
.badge-done { background: #dcfce7; color: #166534; }
.badge-cancel { background: #fee2e2; color: #991b1b; }

.event-form, .user-form {
    background: var(--card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
    font-weight: 500;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
}
.form-group textarea { min-height: 80px; resize: vertical; }

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }

.login-container {
    max-width: 400px;
    margin: 5rem auto;
    background: var(--card);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0 1rem;
}
.calendar-nav { display: flex; gap: 1rem; align-items: center; }
.calendar-title { font-size: 1.25rem; font-weight: 600; }

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.calendar-weekday {
    background: #f1f5f9;
    padding: 0.5rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.85rem;
}
.calendar-day {
    background: var(--card);
    min-height: 120px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
}
.calendar-day.other-month { background: #f8fafc; color: #94a3b8; }
.day-number { font-weight: 600; margin-bottom: 0.25rem; font-size: 0.9rem; }
.day-events { display: flex; flex-direction: column; gap: 0.25rem; flex: 1; }
.event-preview {
    display: block;
    padding: 0.25rem 0.4rem;
    border-radius: 4px;
    font-size: 0.75rem;
    text-decoration: none;
    color: var(--text);
    background: #eff6ff;
    border-left: 3px solid var(--primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.event-preview:hover { background: #dbeafe; }
.event-preview .event-speaker { color: #64748b; font-size: 0.7rem; display: block; }
.event-done { background: #f0fdf4; border-left-color: var(--success); }
.event-cancel { background: #fef2f2; border-left-color: var(--danger); }

.btn-more {
    background: transparent;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.75rem;
    text-align: left;
    padding: 0;
}
.btn-more:hover { text-decoration: underline; }

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}
.detail-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}
.detail-card h3 { margin-top: 0; font-size: 1rem; color: #64748b; text-transform: uppercase; }
.detail-card p { margin: 0.5rem 0; }
.full-width { grid-column: 1 / -1; }

.table { width: 100%; border-collapse: collapse; margin-top: 1rem; background: var(--card); border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.table th, .table td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
.table th { background: #f8fafc; font-size: 0.85rem; text-transform: uppercase; color: #64748b; }

dialog { border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; min-width: 400px; }
dialog::backdrop { background: rgba(0,0,0,0.3); }

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.pagination span {
    font-weight: 600;
    color: #64748b;
}

.strikethrough {
    text-decoration: line-through;
    opacity: 0.6;
}

.event-cancelled {
    opacity: 0.6;
    background: #f1f5f9;
}

.event-cancelled .event-header h3 a {
    text-decoration: line-through;
    color: #94a3b8;
}

.event-cancelled .event-meta p {
    text-decoration: line-through;
}

.event-cancelled-preview {
    text-decoration: line-through;
    opacity: 0.5;
    background: #f1f5f9;
    border-left-color: #94a3b8;
}

.badge-approved {
    background: #fef3c7;
    color: #92400e;
}

.period-toggle { display: flex; gap: 0.5rem; }

.dashboard-period { color: #64748b; font-size: 1.1rem; font-weight: 500; }

.dashboard-grid {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    flex-wrap: wrap;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.pie-legend { flex: 1; min-width: 250px; }
.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
}
.legend-color {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex-shrink: 0;
}
.legend-name { flex: 1; }
.legend-value { color: #64748b; }