:root {
    --primary: #007AFF;
    /* iOS Blue */
    --primary-dark: #0066D6;
    --secondary: #5856D6;
    /* Purple accent */
    --light-bg: #F5F5F7;
    /* Light gray background */
    --card-bg: #FFFFFF;
    --text-main: #1D1D1F;
    --text-muted: #555558;
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    --border-color: #E5E5EA;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glass Panel - now white cards */
.glass-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 600;
    letter-spacing: -0.3px;
    margin-bottom: 1rem;
    color: var(--text-main);
}

h1 {
    font-size: 2rem;
}

p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: var(--light-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #EBEBED;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 14px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    margin-bottom: 30px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.logo span {
    color: var(--primary);
}

.user-greeting {
    color: var(--text-muted);
    font-weight: 500;
}

/* Sidebar Layout */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 40px;
    background: var(--light-bg);
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 8px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(0, 122, 255, 0.1);
    color: var(--primary);
}

.nav-link i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.stat-card {
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 140px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 10px 0;
    color: var(--text-main);
}

.stat-label {
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Booking Calendar/List */
.schedule-list {
    list-style: none;
}

.schedule-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.schedule-item:last-child {
    border-bottom: none;
}

.schedule-time {
    font-weight: 600;
    color: var(--primary);
}

.schedule-info h4 {
    margin-bottom: 4px;
    color: var(--text-main);
    font-weight: 500;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 500px;
    padding: 30px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-4 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.p-3 {
    padding: 1rem;
}

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

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

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

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    color: var(--text-main);
}

tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .admin-wrapper {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .stat-value {
        font-size: 1.75rem;
    }
}