/**
 * Custom CSS Stylesheet
 * Complements Bootstrap 5 with additional styling and enhancements
 */

/* ===========================
   Root Variables & Global Styles
   =========================== */

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --white: #ffffff;
    --border-color: #dee2e6;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --transition-base: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Palatino', sans-serif;
    line-height: 1.6;
    color: #212529;
    background-color: #ffffff;
}

/* ===========================
   Typography
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: #212529;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.8rem;
}

h3 {
    font-size: 1.6rem;
}

h4 {
    font-size: 1.4rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* ===========================
   Buttons
   =========================== */

.btn {
    font-weight: 500;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    transition: var(--transition-base);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

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

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

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

.btn-success:hover {
    background-color: #218838;
    border-color: #218838;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* ===========================
   Cards
   =========================== */

.card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: var(--transition-base);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    background-color: var(--light-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: var(--light-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

.card-title {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

/* ===========================
   Forms
   =========================== */

.form-control,
.form-select {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #212529;
}

.form-group {
    margin-bottom: 1.5rem;
}

/* ===========================
   Navigation
   =========================== */

.navbar {
    box-shadow: var(--shadow-sm);
    background-color: var(--white);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--dark-color) !important;
}

.nav-link {
    font-weight: 500;
    color: #6c757d !important;
    transition: var(--transition-base);
}

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

.nav-link.active {
    color: var(--primary-color) !important;
    border-bottom: 2px solid var(--primary-color);
}

.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 1.5rem;
}

.breadcrumb-item {
    display: inline-block;
}

.breadcrumb-item.active {
    color: #6c757d;
}

/* ===========================
   Badges
   =========================== */

.badge {
    padding: 0.5rem 0.75rem;
    font-weight: 500;
    border-radius: 0.375rem;
    display: inline-block;
}

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

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

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

/* ===========================
   Alerts
   =========================== */

.alert {
    border-radius: 0.5rem;
    border: 1px solid transparent;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.alert-primary {
    background-color: #e7f3ff;
    border-color: #b3d9ff;
    color: #004085;
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* ===========================
   Images & Media
   =========================== */

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.img-fluid {
    max-width: 100%;
    height: auto;
}

.img-rounded {
    border-radius: 0.5rem;
}

.img-circle {
    border-radius: 50%;
}

/* ===========================
   Containers & Sections
   =========================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

section {
    padding: 3rem 0;
}

section.py-5 {
    padding: 3rem 0;
}

section.py-3 {
    padding: 1.5rem 0;
}

/* ===========================
   Utilities
   =========================== */

.shadow {
    box-shadow: var(--shadow-md) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

.rounded {
    border-radius: 0.5rem;
}

.rounded-lg {
    border-radius: 1rem;
}

.text-muted {
    color: #6c757d !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

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

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

.text-center {
    text-align: center;
}

.text-start {
    text-align: left;
}

.text-end {
    text-align: right;
}

.bg-light {
    background-color: var(--light-color) !important;
}

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

.border {
    border: 1px solid var(--border-color) !important;
}

.border-top {
    border-top: 1px solid var(--border-color) !important;
}

.border-bottom {
    border-bottom: 1px solid var(--border-color) !important;
}

/* ===========================
   Spacing Utilities
   =========================== */

.m-0 { margin: 0 !important; }
.m-1 { margin: 0.5rem !important; }
.m-2 { margin: 1rem !important; }
.m-3 { margin: 1.5rem !important; }
.m-4 { margin: 2rem !important; }
.m-5 { margin: 3rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.5rem !important; }
.p-2 { padding: 1rem !important; }
.p-3 { padding: 1.5rem !important; }
.p-4 { padding: 2rem !important; }
.p-5 { padding: 3rem !important; }

.pt-3 { padding-top: 1.5rem !important; }
.pb-3 { padding-bottom: 1.5rem !important; }
.px-3 { padding-left: 1.5rem !important; padding-right: 1.5rem !important; }
.py-3 { padding-top: 1.5rem !important; padding-bottom: 1.5rem !important; }

/* ===========================
   Responsive Utilities
   =========================== */

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    section {
        padding: 2rem 0;
    }

    .container {
        padding: 0 0.75rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .card {
        margin-bottom: 1rem;
    }
}

/* ===========================
   Transitions & Animations
   =========================== */

.transition-all {
    transition: var(--transition-base);
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}