:root {
    --primary-color: #0056b3;
    --primary-hover: #004494;
    --secondary-color: #6c757d;
    --background-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --header-height: 60px;
    --sidebar-width: 250px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navigation */
.navbar {
    background-color: var(--card-bg);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-brand img {
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(0,86,179,0.05);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

/* Layout */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    width: 95%;
    flex: 1;
}

.grid-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.card-header {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Dashboard Specific */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary-color), #003366);
    color: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0,86,179,0.2);
}

.welcome-banner h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.announcement-item {
    padding: 1rem 0;
    border-bottom: 1px solid #f0f0f0;
}

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

.announcement-date {
    font-size: 0.85rem;
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.25rem;
}

.team-member {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}

.team-member:last-child {
    border-bottom: none;
}

.member-info h4 {
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.member-role {
    font-size: 0.85rem;
    color: var(--secondary-color);
    display: block;
}

.member-email {
    font-size: 0.8rem;
    color: var(--primary-color);
    text-decoration: none;
}

/* Booking Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #444;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,86,179,0.1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
}

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

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

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

.btn-secondary:hover {
    background-color: #5a6268;
}

.helper-text {
    font-size: 0.85rem;
    color: var(--secondary-color);
    margin-top: 0.25rem;
    display: block;
}

/* Validation Styles */
.is-invalid {
    border-color: var(--danger-color);
}

.error-message {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    display: none;
}

/* Confirmation Page */
.confirmation-card {
    text-align: center;
    max-width: 600px;
    margin: 2rem auto;
}

.success-icon {
    width: 80px;
    height: 80px;
    background-color: #d4edda;
    color: #155724;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1.5rem;
}

.confirmation-code-box {
    background-color: #e9ecef;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    border: 2px dashed var(--secondary-color);
}

.code-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 0.5rem;
    font-family: monospace;
    letter-spacing: 2px;
}

/* Footer */
footer {
    background-color: white;
    padding: 2rem 0;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-link:hover {
    color: var(--primary-color);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    display: none;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-color);
}

/* Toast Notification */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
}

.toast {
    background: white;
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast-message {
    font-size: 0.95rem;
    color: var(--text-color);
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--secondary-color);
    cursor: pointer;
    margin-left: 10px;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}