:root {
    --primary-color: #1a365d; --primary-hover: #2a4b80; --accent-color: #c53030;
    --bg-color: #f1f5f9; --card-bg: #ffffff; --text-color: #1e293b; --text-muted: #64748b; --border-color: #e2e8f0;
    --available-color: #16a34a; --available-bg: #dcfce7; --booked-color: #dc2626; --booked-bg: #fee2e2;
    --selected-color: #2563eb; --selected-bg: #dbeafe; --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1); --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
}
body.dark-mode {
    --bg-color: #0f172a; --card-bg: #1e293b; --text-color: #f1f5f9; --text-muted: #94a3b8; --border-color: #334155;
    --available-bg: #052e16; --available-color: #4ade80; --booked-bg: #450a0a; --booked-color: #f87171;
    --selected-bg: #172554; --selected-color: #60a5fa;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Fira Sans', sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; transition: background-color 0.3s ease, color 0.3s ease; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.app-header { background-color: var(--card-bg); box-shadow: var(--shadow-sm); padding: 15px 0; margin-bottom: 30px; border-bottom: 3px solid var(--primary-color); }
.app-header .container { display: flex; justify-content: space-between; align-items: center; }
.brand h1 { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); margin: 0; }
.brand span { font-size: 0.9rem; color: var(--text-muted); }
.header-actions { display: flex; gap: 15px; align-items: center; }
.btn { padding: 10px 20px; border: none; border-radius: 6px; cursor: pointer; font-family: 'Fira Sans', sans-serif; font-weight: 500; font-size: 0.95rem; transition: all 0.2s ease; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.btn-primary { background-color: var(--primary-color); color: #fff; } .btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background-color: transparent; color: var(--text-color); border: 1px solid var(--border-color); } .btn-secondary:hover { background-color: var(--bg-color); }
.btn-icon { padding: 8px 12px; font-size: 1.1rem; background: transparent; border: 1px solid var(--border-color); }
.form-card { background-color: var(--card-bg); border-radius: 12px; box-shadow: var(--shadow-lg); padding: 40px; margin-bottom: 40px; }
.form-title { font-size: 1.8rem; color: var(--primary-color); margin-bottom: 5px; } .form-subtitle { color: var(--text-muted); margin-bottom: 30px; }
.ai-assistant { background: rgba(37, 99, 235, 0.05); border: 1px solid #2563eb; padding: 15px; border-radius: 8px; margin-bottom: 20px; }
.ai-assistant label { color: #2563eb; font-weight: 600; margin-bottom: 10px; display: block; }
.form-section { border: 1px solid var(--border-color); border-radius: 8px; padding: 20px; margin-bottom: 25px; }
.form-section legend { font-weight: 600; color: var(--primary-color); padding: 0 10px; font-size: 1.1rem; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 15px; }
.form-group { display: flex; flex-direction: column; } .form-group.full-width { grid-column: 1 / -1; }
.form-group label { margin-bottom: 8px; font-weight: 500; font-size: 0.9rem; } .req { color: var(--accent-color); }
input, select, textarea { padding: 10px 12px; border: 1px solid var(--border-color); border-radius: 6px; font-family: 'Fira Sans', sans-serif; font-size: 0.95rem; background-color: var(--bg-color); color: var(--text-color); transition: border-color 0.2s; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1); }
input[readonly] { background-color: #e2e8f0; cursor: not-allowed; } body.dark-mode input[readonly] { background-color: #0f172a; }
.checkbox-group { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 10px; }
.checkbox-group label { display: flex; align-items: center; gap: 8px; font-weight: 400; } .checkbox-group input[type="checkbox"] { width: 18px; height: 18px; }
.slot-section { border: 2px dashed var(--primary-color); background: rgba(26, 54, 93, 0.02); }
.info-text { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 15px; }
.slot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 15px; }
.slot-placeholder { grid-column: 1 / -1; text-align: center; color: var(--text-muted); padding: 30px; border: 1px dashed var(--border-color); border-radius: 8px; }
.slot-card { padding: 12px; border-radius: 8px; cursor: pointer; transition: transform 0.1s, box-shadow 0.2s; border: 1px solid transparent; position: relative; }
.slot-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.slot-card .time { font-weight: 700; font-size: 1rem; margin-bottom: 4px; } .slot-card .status { font-size: 0.75rem; text-transform: uppercase; font-weight: 600; letter-spacing: 0.5px; }
.slot-card .details { font-size: 0.75rem; margin-top: 6px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.slot-card.available { background-color: var(--available-bg); color: var(--available-color); border-color: var(--available-color); }
.slot-card.booked { background-color: var(--booked-bg); color: var(--booked-color); border-color: var(--booked-color); cursor: not-allowed; }
.slot-card.selected { background-color: var(--selected-bg); color: var(--selected-color); border-color: var(--selected-color); transform: scale(1.02); box-shadow: var(--shadow-md); }
.legend { display: flex; gap: 20px; justify-content: center; margin-top: 10px; } .legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); }
.dot { width: 12px; height: 12px; border-radius: 50%; } .dot.available { background-color: var(--available-color); } .dot.booked { background-color: var(--booked-color); } .dot.selected { background-color: var(--selected-color); }
.approval-info { background: var(--bg-color); padding: 15px; border-radius: 6px; margin-bottom: 15px; } .approval-info p { margin-bottom: 5px; }
.form-actions { display: flex; justify-content: flex-end; gap: 15px; margin-top: 30px; }
.toast { position: fixed; bottom: 30px; right: 30px; background-color: var(--primary-color); color: #fff; padding: 15px 25px; border-radius: 6px; box-shadow: var(--shadow-lg); display: none; z-index: 1000; font-weight: 500; }
.toast.show { display: block; animation: slideIn 0.3s ease; } .toast.error { background-color: var(--accent-color); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@media (max-width: 768px) { .form-card { padding: 20px; } .app-header .container { flex-direction: column; gap: 15px; } .slot-grid { grid-template-columns: 1fr; } }
@media print { body { background: #fff; } .app-header, .form-actions, .header-actions { display: none; } .form-card { box-shadow: none; border: none; padding: 0; } .slot-section { display: none; } .form-section { border: 1px solid #ccc; page-break-inside: avoid; } }