:root {
    --primary: #4e73df;
    --primary-dark: #2e59d9;
    --secondary: #858796;
    --success: #1cc88a;
    --info: #36b9cc;
    --warning: #f6c23e;
    --danger: #e74a3b;
    --dark: #5a5c69;
    --light: #f8f9fc;
    --white: #fff;
}

/* Base Styles */
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #212529;
    background-color: var(--light);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

a {
    text-decoration: none;
    transition: all 0.3s ease;
}

/* Header & Navigation */
.navbar {
    padding: 1rem 0;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 6rem 0;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero .lead {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 2rem 0 rgba(58, 59, 69, 0.2);
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.5rem 0.5rem;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
}

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

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

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

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

/* Footer */
footer {
    background-color: #2c3e50;
}

footer h5 {
    position: relative;
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

footer h5::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary);
}

footer a {
    color: rgba(255, 255, 255, 0.7);
}

footer a:hover {
    color: white;
    text-decoration: none;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    margin-right: 0.5rem;
}

.social-icons a:hover {
    background-color: var(--primary);
}

/* Back to top button */
.back-to-top {
    width: 50px;
    height: 50px;
    display: none;
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
}

/* Admin specific styles */
body.admin-dashboard {
    background-color: #f8f9fc;
}

body.admin-dashboard .navbar {
    box-shadow: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .lead {
        font-size: 1.1rem;
    }
    
    .navbar-collapse {
        padding-top: 1rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 4rem 0;
        text-align: center;
    }
    
    .hero .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    footer .col-md-6 {
        text-align: center !important;
        margin-bottom: 1.5rem;
    }
}

/* Login Page Styles */
.login-card {
    border: none;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1);
}

.login-card .card-header {
    padding: 1.5rem;
    border-bottom: none;
}

.login-card .form-control {
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
}

.login-card .btn {
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 0.375rem;
}

.login-card .invalid-feedback {
    margin-top: 0.25rem;
}

.login-card .form-check-input {
    margin-top: 0.2em;
}

@media (max-width: 576px) {
    .login-card {
        margin-top: 2rem;
    }
}