/* ===================================
   BYU-Idaho Public Health Internship Website
   Brand Colors & Typography
   =================================== */

/* CSS Variables for BYU-Idaho Branding */
:root {
    /* Primary Colors */
    --byui-blue: #006EB6;
    --byui-navy: #002E5D;
    --byui-white: #FFFFFF;
    
    /* Accent Colors */
    --byui-gold: #FFB81C;
    --byui-light-blue: #E8F4FC;
    
    /* Neutral Colors */
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;
    
    /* Typography */
    --font-heading: 'Source Sans Pro', 'Segoe UI', Tahoma, sans-serif;
    --font-body: 'Open Sans', 'Segoe UI', Tahoma, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--gray-800);
    line-height: 1.6;
    background-color: var(--byui-white);
}

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

a {
    color: var(--byui-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--byui-navy);
    text-decoration: underline;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--byui-navy);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    border-bottom: 3px solid var(--byui-blue);
    padding-bottom: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
    color: var(--byui-blue);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    background: linear-gradient(135deg, var(--byui-navy) 0%, var(--byui-blue) 100%);
    color: var(--byui-white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--byui-white);
    line-height: 1.2;
}

.logo-text span {
    display: block;
    font-size: 0.875rem;
    font-weight: 400;
    opacity: 0.9;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--byui-white);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    text-decoration: none;
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.25);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--byui-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--byui-white);
    margin: 5px 0;
    transition: var(--transition-normal);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    background: linear-gradient(135deg, var(--byui-blue) 0%, var(--byui-navy) 100%);
    color: var(--byui-white);
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
}

.hero h1 {
    color: var(--byui-white);
    font-size: 2.75rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.hero-cta {
    display: inline-block;
    background-color: var(--byui-gold);
    color: var(--byui-navy);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: var(--byui-navy);
}

/* ===================================
   Main Content
   =================================== */
.main {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.content-section {
    margin-bottom: var(--spacing-xxl);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--byui-blue) 0%, var(--byui-navy) 100%);
    color: var(--byui-white);
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    color: var(--byui-white);
    max-width: 1000px;
    margin: 0 auto;
}

.page-header p {
    max-width: 1000px;
    margin: var(--spacing-md) auto 0;
    opacity: 0.95;
}

/* ===================================
   Cards & Boxes
   =================================== */
.card {
    background-color: var(--byui-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--byui-blue);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.card h3 {
    margin-bottom: var(--spacing-sm);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--byui-blue);
}

/* Info Box */
.info-box {
    background-color: var(--byui-light-blue);
    border-left: 4px solid var(--byui-blue);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
}

.info-box h4 {
    color: var(--byui-navy);
    margin-bottom: var(--spacing-sm);
}

/* Warning Box */
.warning-box {
    background-color: #FFF8E1;
    border-left: 4px solid var(--byui-gold);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
}

.warning-box h4 {
    color: #F57C00;
    margin-bottom: var(--spacing-sm);
}

/* Success Box */
.success-box {
    background-color: #E8F5E9;
    border-left: 4px solid #4CAF50;
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
}

.success-box h4 {
    color: #2E7D32;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   Lists
   =================================== */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

li {
    margin-bottom: var(--spacing-sm);
}

.checklist {
    list-style: none;
    padding-left: 0;
}

.checklist li {
    position: relative;
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--byui-blue);
    font-weight: bold;
}

/* Steps List */
.steps-list {
    counter-reset: step-counter;
    list-style: none;
    padding-left: 0;
}

.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 3.5rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.steps-list li:last-child {
    border-bottom: none;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--byui-blue);
    color: var(--byui-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* ===================================
   Tables
   =================================== */
.table-container {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--byui-white);
    box-shadow: var(--shadow-sm);
}

th, td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background-color: var(--byui-navy);
    color: var(--byui-white);
    font-weight: 600;
}

tr:hover {
    background-color: var(--gray-100);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--byui-navy);
    color: var(--byui-white);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--gray-200);
    color: var(--gray-800);
}

.btn-secondary:hover {
    background-color: var(--gray-300);
    text-decoration: none;
}

.btn-accent {
    background-color: var(--byui-gold);
    color: var(--byui-navy);
}

.btn-accent:hover {
    background-color: #E5A619;
    text-decoration: none;
}

/* ===================================
   Accordion / Collapsible
   =================================== */
.accordion {
    margin: var(--spacing-lg) 0;
}

.accordion-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.accordion-header {
    background-color: var(--gray-100);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    transition: background-color var(--transition-fast);
}

.accordion-header:hover {
    background-color: var(--gray-200);
}

.accordion-header::after {
    content: "+";
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--byui-blue);
}

.accordion-item.active .accordion-header::after {
    content: "−";
}

.accordion-content {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.accordion-item.active .accordion-content {
    padding: var(--spacing-lg);
    max-height: 2000px;
}

/* ===================================
   Progress Tracker
   =================================== */
.progress-tracker {
    display: flex;
    justify-content: space-between;
    margin: var(--spacing-xl) 0;
    position: relative;
}

.progress-tracker::before {
    content: "";
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--gray-200);
    z-index: 0;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.progress-step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--gray-200);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.progress-step.completed .progress-step-number {
    background-color: var(--byui-blue);
    color: var(--byui-white);
}

.progress-step.active .progress-step-number {
    background-color: var(--byui-gold);
    color: var(--byui-navy);
}

.progress-step-label {
    font-size: 0.875rem;
    text-align: center;
    color: var(--gray-600);
}

.progress-step.completed .progress-step-label,
.progress-step.active .progress-step-label {
    color: var(--gray-800);
    font-weight: 500;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--byui-navy);
    color: var(--byui-white);
    padding: var(--spacing-xxl) var(--spacing-lg) var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--byui-gold);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--gray-300);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--byui-white);
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--gray-600);
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.highlight {
    background-color: var(--byui-light-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .header-container {
        flex-wrap: wrap;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-list {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: var(--spacing-md) 0;
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-link {
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .progress-tracker {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .progress-tracker::before {
        display: none;
    }
    
    .progress-step {
        flex-direction: row;
        gap: var(--spacing-md);
    }
    
    .progress-step-label {
        text-align: left;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .main {
        padding: var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .header,
    .footer,
    .nav-toggle {
        display: none;
    }
    
    .main {
        max-width: 100%;
        padding: 0;
    }
    
    a {
        color: var(--gray-800);
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}