:root {
    --primary-color: #79D7AD;
    --primary-dark: #5bb391;
    --primary-light: #a3e5c4;
    --complementary-color: #d779a3;
    --complementary-dark: #c85a8f;
    --complementary-light: #e5a3c4;
    --surface-color: #ffffff;
    --background-color: #f5f5f5;
    --dark-surface: #1a1a1a;
    --on-surface: #212121;
    --on-surface-variant: #757575;
    --outline: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --elevation-1: 0 2px 4px rgba(0, 0, 0, 0.1);
    --elevation-2: 0 4px 8px rgba(0, 0, 0, 0.12);
    --elevation-3: 0 8px 16px rgba(0, 0, 0, 0.15);
    --elevation-4: 0 16px 32px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Work Sans', sans-serif;
    background-color: var(--surface-color);
    color: var(--on-surface);
    line-height: 1.6;
}

/* Material Design Header */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--elevation-2);
    transition: all 0.3s ease;
    min-height: 80px;
    padding: 1rem 0;
}

.navbar .container {
    max-width: 1200px;
    width: 100%;
}

.navbar-brand {
    font-family: 'Lato', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-nav .nav-link {
    color: var(--on-surface) !important;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    margin: 0 0.5rem;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 100%;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

/* Material Design Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 24px;
    padding: 12px 24px;
    font-weight: 600;
    box-shadow: var(--elevation-2);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--elevation-3);
}

.btn-primary .material-icons {
    font-size: 1.2rem;
    line-height: 1;
    vertical-align: middle;
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 24px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Material Design Cards */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: var(--elevation-1);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--elevation-3);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 1.5rem;
}

/* Material Design Form Controls */
.form-control {
    border: 2px solid var(--outline);
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(121, 215, 173, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--on-surface);
    margin-bottom: 0.5rem;
}

/* Material Design Alerts */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
}

.alert-primary {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
}

/* Material Design Progress */
.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--outline);
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--complementary-color));
    border-radius: 4px;
}

/* Material Design Badges */
.badge {
    border-radius: 12px;
    padding: 0.5rem 0.75rem;
    font-weight: 500;
}

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

/* Material Design Tables */
.table {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--elevation-1);
}

.table thead th {
    background: var(--background-color);
    border: none;
    font-weight: 600;
    color: var(--on-surface);
}

.table tbody tr:hover {
    background: rgba(121, 215, 173, 0.1);
}

/* Material Design Modals */
.modal-content {
    border: none;
    border-radius: 16px;
    box-shadow: var(--elevation-4);
}

.modal-header {
    border: none;
    padding: 2rem 2rem 1rem;
}

.modal-body {
    padding: 1rem 2rem;
}

.modal-footer {
    border: none;
    padding: 1rem 2rem 2rem;
}

/* Utility Classes */
.elevation-1 { box-shadow: var(--elevation-1); }
.elevation-2 { box-shadow: var(--elevation-2); }
.elevation-3 { box-shadow: var(--elevation-3); }
.elevation-4 { box-shadow: var(--elevation-4); }

.surface { background: var(--surface-color); }
.background { background: var(--background-color); }

.text-primary-custom { color: var(--primary-color) !important; }
.text-complementary { color: var(--complementary-color) !important; }
.text-on-surface { color: var(--on-surface) !important; }
.text-on-surface-variant { color: var(--on-surface-variant) !important; }

.bg-primary-custom { background: var(--primary-color) !important; }
.bg-complementary { background: var(--complementary-color) !important; }

/* Material Design Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.ripple:active::before {
    width: 300px;
    height: 300px;
}

/* Ripple Animation Keyframes */
@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .navbar {
        min-height: 70px;
        padding: 0.75rem 0;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    main {
        padding-top: 80px !important;
    }
}

@media (max-width: 576px) {
    .navbar {
        min-height: 64px;
        padding: 0.5rem 0;
    }
    
    main {
        padding-top: 70px !important;
    }
}