:root {
    --primary-color: #4f46e5; /* Indigo modern */
    --primary-hover: #4338ca;
    --admin-color: #ef4444;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    
    /* Warna Label Ruangan di Kalender */
    --color-room-a: #3b82f6;
    --color-room-b: #10b981;
    --color-room-aula: #f59e0b;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    padding: 30px 20px;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
}

/* Auth Bar / Akses Kontrol */
.auth-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 12px 24px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.status-label {
    font-size: 0.95rem;
    font-weight: 500;
}

.auth-buttons {
    display: flex;
    gap: 8px;
}

.btn-role {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background-color: #fff;
    cursor: pointer;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.btn-role.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

header {
    text-align: center;
    margin-bottom: 35px;
}

header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.025em;
    margin-bottom: 6px;
}

header p {
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 500;
}

/* Grid Layout */
.grid-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 992px) {
    .grid-layout.admin-mode {
        grid-template-columns: 350px 1fr;
    }
}

.card-form, .card-calendar {
    background-color: var(--card-bg);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
}

h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
}

/* Form Styling */
.form-group {
    margin-bottom: 18px;
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-main);
}

input, select, textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-main);
    background-color: #f8fafc;
    transition: all 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-submit {
    width: 100%;
    padding: 13px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background-color 0.2s;
    margin-top: 10px;
}

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

/* Kustomisasi Tampilan Kalender & Legend */
.calendar-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.legend {
    display: flex;
    gap: 10px;
}

.badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.badge.room-a { background-color: var(--color-room-a); }
.badge.room-b { background-color: var(--color-room-b); }
.badge.room-aula { background-color: var(--color-room-aula); }

/* Atur tinggi kalender agar pas */
#calendar {
    max-width: 100%;
    margin: 0 auto;
    font-size: 0.9rem;
}

/* Modifikasi tombol internal FullCalendar agar serasi */
.fc .fc-button-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}
.fc .fc-button-primary:hover {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
}