/* Base Styles & Variables */
:root {
    /* Color Palette */
    --color-primary: #0B252F;
    --color-secondary: #265566;
    --color-accent: #35788B;
    --color-muted-accent: #568A8F;
    --color-cta: #5188D5;
    --color-light-accent: #68D0EE;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-off-white: #F8F9FA;
    --color-light-gray: #E9ECEF;
    --color-gray: #6C757D;
    --color-dark-gray: #343A40;
    --color-black: #212529;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-heading: 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-unit: 1rem; /* 16px */
    --container-max-width: 1200px;
    
    /* Borders & Shadows */
    --border-radius: 4px;
    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-black);
    background-color: var(--color-off-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
    color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a {
    color: var(--color-cta);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover,
a:focus {
    color: var(--color-light-accent);
    text-decoration: underline;
}

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

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 1.5);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 2px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-light-accent);
    color: var(--color-primary);
    text-decoration: none;
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-cta);
    color: var(--color-white);
    text-decoration: none;
}

.btn-text {
    color: var(--color-cta);
    padding: 0;
    border: none;
    background: none;
    font-weight: 600;
}

.btn-text:hover,
.btn-text:focus {
    text-decoration: underline;
    background: none;
}

/* Header */
.site-header {
    background-color: var(--color-primary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

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

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-list li {
    margin-left: 2rem;
    position: relative;
}

.nav-list a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-list a:hover,
.nav-list a:focus,
.nav-list a.active {
    color: var(--color-light-accent);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-light-accent);
    transition: width var(--transition-speed) ease;
}

.nav-list a:hover::after,
.nav-list a:focus::after,
.nav-list a.active::after {
    width: 100%;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    background: none;
    border: none;
    color: var(--color-white);
    font-family: inherit;
    font-size: inherit;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 0;
    padding-right: 1.5rem;
    position: relative;
}

.dropdown-arrow {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.6em;
    transition: transform var(--transition-speed) ease;
}

.dropdown-toggle[aria-expanded="true"] .dropdown-arrow {
    transform: translateY(-50%) rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    min-width: 200px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-hover);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-speed) ease;
    z-index: 1000;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-primary);
}

.dropdown-menu a:hover,
.dropdown-menu a:focus {
    background-color: var(--color-light-gray);
    color: var(--color-primary);
    text-decoration: none;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu,
.dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 200px;
    margin: 0 auto 2rem;
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
    font-size: 3rem;
    line-height: 1.2;
}

.hero p.lead {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Announcements Section */
.announcements {
    padding: 5rem 0;
    background-color: var(--color-white);
}

.announcements h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.announcement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.announcement-card {
    background: var(--color-off-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

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

.announcement-card h3 {
    color: var(--color-primary);
    padding: 1.5rem 1.5rem 0.5rem;
    margin-bottom: 0.5rem;
}

.announcement-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--color-gray);
}

.announcement-card .btn-text {
    margin: 0 1.5rem 1.5rem;
    display: inline-block;
}

/* Footer */
.site-footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 4rem 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--color-muted-accent);
}

.footer-links h3,
.footer-contact h3 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--color-muted-accent);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--color-light-accent);
    text-decoration: none;
}

.footer-contact address {
    font-style: normal;
    color: var(--color-muted-accent);
}

.footer-contact a {
    color: var(--color-muted-accent);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.footer-contact a:hover,
.footer-contact a:focus {
    color: var(--color-light-accent);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.footer-legal ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-legal li {
    margin-left: 1.5rem;
}

.footer-legal a {
    color: var(--color-muted-accent);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-speed) ease;
}

.footer-legal a:hover,
.footer-legal a:focus {
    color: var(--color-light-accent);
    text-decoration: none;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    z-index: 1001;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--color-light-accent);
    outline-offset: 2px;
}

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger {
    display: block;
    position: relative;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: background-color 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: transform 0.3s ease;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .announcement-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }
    
    .primary-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--color-primary);
        padding: 6rem 2rem 2rem;
        transition: right 0.3s ease;
        overflow-y: auto;
    }
    
    .primary-navigation[data-visible="true"] {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav-list li {
        margin-left: 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        background: none;
        padding: 0.5rem 0 0 1rem;
        margin: 0;
        transform: none;
    }
    
    .dropdown-menu a {
        color: var(--color-muted-accent);
        padding: 0.25rem 0;
    }
    
    .dropdown-menu a:hover,
    .dropdown-menu a:focus {
        background: none;
        color: var(--color-light-accent);
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p.lead {
        font-size: 1.125rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    .announcements {
        padding: 3rem 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .footer-legal ul {
        justify-content: center;
    }
    
    .footer-legal li {
        margin: 0 0.75rem;
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .btn {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        font-weight: normal;
        color: var(--color-gray);
    }
    
    .announcement-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}