/* 2DIE4 Monitor — Base Styles */
:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, sans-serif; background: var(--color-bg); color: var(--color-text); }

/* Header */
#header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); padding: 1rem 1.5rem; display: flex; align-items: center; justify-content: space-between; }
#header h1 { font-size: 1.25rem; font-weight: 700; }
#header-meta { display: flex; align-items: center; gap: 1rem; font-size: 0.875rem; }

/* Buttons */
.btn-primary, .btn-secondary, .btn-download, .btn-logout {
  padding: 0.4rem 0.9rem; border-radius: var(--radius); cursor: pointer;
  font-size: 0.875rem; border: none; text-decoration: none; display: inline-block;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-secondary { background: var(--color-border); color: var(--color-text); }
.btn-download { background: #f0fdf4; color: #166534; border: 1px solid #86efac; }
.btn-logout { background: transparent; color: var(--color-text-muted); }

/* KPI Cards */
#kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding: 1.5rem; }
.kpi-card { background: var(--color-surface); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); }
.kpi-label { display: block; font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 0.5rem; }
.kpi-value { display: block; font-size: 2rem; font-weight: 700; color: var(--color-accent); }

/* Chart */
#chart-section { background: var(--color-surface); margin: 0 1.5rem 1.5rem; border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
.chart-controls { margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; }
.chart-controls select { padding: 0.3rem 0.6rem; border: 1px solid var(--color-border); border-radius: var(--radius); }

/* Table */
#sessions-section { background: var(--color-surface); margin: 0 1.5rem 1.5rem; border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
#sessions-section h2 { font-size: 1rem; margin-bottom: 1rem; }
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 2px solid var(--color-border); color: var(--color-text-muted); font-weight: 600; }
td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--color-border); }
tr:hover td { background: var(--color-bg); }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal.hidden { display: none; }
.modal-content { background: var(--color-surface); border-radius: var(--radius); padding: 1.5rem; width: 100%; max-width: 480px; }
.modal-content h3 { margin-bottom: 1.25rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 0.25rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius); font-size: 0.875rem; }
.form-actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; }
.csv-import { margin-top: 1rem; font-size: 0.8rem; color: var(--color-text-muted); }
.csv-import code { background: var(--color-bg); padding: 0.1rem 0.3rem; border-radius: 3px; }

/* Login */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { background: var(--color-surface); border-radius: var(--radius); padding: 2.5rem; width: 100%; max-width: 360px; box-shadow: var(--shadow); text-align: center; }
.login-container h1 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.login-container .subtitle { color: var(--color-text-muted); font-size: 0.875rem; margin-bottom: 2rem; }

/* Occupancy color classes (tabela e destaques) */
.occ-high { color: #166534; font-weight: 600; }
.occ-mid  { color: #92400e; font-weight: 600; }
.occ-low  { color: #991b1b; font-weight: 600; }

/* Login error */
.login-error { color: var(--color-danger); font-size: 0.875rem; margin-bottom: 1rem; }

@media (max-width: 640px) {
  #kpis { grid-template-columns: 1fr; }
}