:root {
    --primary-color: hsl(230, 85%, 32%);         /* Tailwind blue: #1e3a8a */
    --accent-color: hsl(120, 60%, 50%);            /* Tailwind red: #dc2626 */
    --danger-color: hsl(0, 84%, 60%);            /* Red */
    --light-bg: hsl(210, 40%, 98%);              /* Light background */
    --dark-text: hsl(224, 71%, 4%);              /* Foreground text */
    --muted-text: hsl(215, 16%, 47%);            /* Muted */
}

body {
    font-family: 'Lato', sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
}

.display-1, .display-2, .display-3, .display-4 {
    font-weight: 900;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-color) 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff" fill-opacity="0.05" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: all 0.15s ease-in-out;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    background-color: var(--light-bg);
    border-bottom: 1px solid hsl(214, 32%, 91%);
}

/* Buttons */
.btn {
    font-weight: 600;
    letter-spacing: 0.025em;
    border-radius: 0.375rem;
    padding: 0.75rem 1.5rem;
}

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

.btn-primary:hover {
    background-color: hsl(230, 80%, 28%);
    border-color: hsl(230, 80%, 28%);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Badges */
.badge {
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Forms */
.form-control, .form-select {
    border-radius: 0.375rem;
    border: 1px solid hsl(214, 32%, 91%);
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem hsla(230, 85%, 32%, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.invalid-feedback {
    display: block;
}

/* Table */
.table th {
    font-weight: 600;
    background-color: var(--light-bg);
    border-bottom: 2px solid hsl(214, 32%, 91%);
}

.table-striped > tbody > tr:nth-of-type(odd) > td,
.table-striped > tbody > tr:nth-of-type(odd) > th {
    background-color: hsla(210, 40%, 98%, 0.5);
}

/* Navbar */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
}

.alert-info {
    background-color: hsl(210, 100%, 95%);
    color: var(--primary-color);
}

/* Footer */
.footer-logo {
    height: 60px;
    width: auto;
    object-fit: contain;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .footer-logo {
        height: 40px;
        margin-bottom: 1rem;
    }
}

/* Admin Panel Specific */
.admin-header {
    background-color: var(--light-bg);
    border-bottom: 1px solid hsl(214, 32%, 91%);
}

.admin-sidebar {
    background-color: var(--light-bg);
    min-height: calc(100vh - 76px);
}

.admin-sidebar .nav-link {
    color: var(--dark-text);
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin-bottom: 0.25rem;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

/* Status badges */
.status-oczekujace {
    background-color: hsl(43, 74%, 66%);
    color: var(--dark-text);
}

.status-zatwierdzone {
    background-color: var(--accent-color);
}

.status-odrzucone {
    background-color: var(--danger-color);
}

/* Loading spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Print styles */
@media print {
    .navbar, .btn, .admin-sidebar {
        display: none !important;
    }

    .container {
        max-width: none !important;
    }
}