:root {
    --navy: #001E44;
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --text-gray: #495057;
    --medium-gray: #6C757D;
    --accent-blue: #0066CC;
    --success: #28A745;
    --warning: #FFC107;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Arial, sans-serif;
    color: var(--text-gray);
    line-height: 1.6;
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

header {
    background: var(--navy);
    color: var(--white);
    padding: 24px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-toggle {
    display: none;
}

nav {
    display: block;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

nav a {
    display: block;
    color: var(--white);
    text-decoration: none;
    padding: 8px 12px;
    transition: background 0.3s;
    border-radius: 4px;
    font-size: 0.9rem;
}

nav a:hover, nav a:focus {
    background: rgba(255,255,255,0.1);
}

.hero {
    background: linear-gradient(135deg, var(--navy) 0%, #003366 100%);
    color: var(--white);
    padding: 48px 0;
    text-align: center;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: var(--white);
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.95;
    color: var(--white);
    font-weight: 500;
}

.quick-info {
    padding: 32px 0;
    background: var(--light-gray);
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 24px;
}

.card {
    background: var(--white);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card-icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--navy);
    color: var(--white);
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.card h3 {
    color: var(--navy);
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.card p {
    color: var(--text-gray);
    margin-bottom: 4px;
}

.card .highlight {
    font-weight: 600;
    color: var(--navy);
    font-size: 1.1rem;
    display: block;
    margin-top: 8px;
}

section {
    padding: 32px 0;
}

section:nth-child(even) {
    background: var(--light-gray);
}

h2 {
    color: var(--navy);
    font-size: 1.8rem;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--navy);
}

h3 {
    color: var(--navy);
    font-size: 1.3rem;
    margin: 24px 0 16px;
}

.collapsible {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.collapsible-header {
    padding: 16px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--white);
    border: none;
    width: 100%;
    text-align: left;
    font-size: 1.1rem;
    color: var(--navy);
    font-weight: 600;
    border-radius: 8px;
    transition: background 0.3s;
}

.collapsible-header:hover {
    background: var(--light-gray);
}

.collapsible-header::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform 0.3s;
}

.collapsible.active .collapsible-header::after {
    transform: rotate(45deg);
}

.collapsible-content {
    display: none;
    padding: 0 16px 16px;
}

.collapsible.active .collapsible-content {
    display: block;
}

.list-item {
    padding: 12px;
    border-left: 3px solid var(--navy);
    margin-bottom: 12px;
    background: var(--white);
}

.list-item strong {
    color: var(--navy);
    display: block;
    margin-bottom: 4px;
}

.list-item a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
}

.list-item a:hover {
    text-decoration: underline;
}

.button {
    display: inline-block;
    padding: 12px 24px;
    background: var(--navy);
    color: var(--white);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: opacity 0.3s;
}

.button:hover {
    opacity: 0.9;
}

.emergency {
    background: #FFF3CD;
    border-left: 4px solid var(--warning);
    padding: 16px;
    margin: 16px 0;
    border-radius: 4px;
}

.emergency strong {
    color: #856404;
}

footer {
    background: var(--navy);
    color: var(--white);
    padding: 32px 0;
    text-align: center;
    margin-top: 48px;
}

.paw-print {
    font-size: 1.5rem;
    margin: 0 8px;
    opacity: 0.8;
}

.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--navy);
    color: var(--white);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 1000;
    border-radius: 0 0 4px 0;
}

.skip-to-content:focus {
    top: 0;
}

@media (min-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
    }

    nav ul {
        gap: 24px;
    }

    nav a {
        padding: 8px 16px;
        font-size: 1rem;
    }

    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    h1 {
        font-size: 2rem;
    }

    .hero h2 {
        font-size: 2.5rem;
    }
}

@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media print {
    header, nav, footer, .nav-toggle {
        display: none;
    }

    .collapsible-content {
        display: block !important;
    }

    .collapsible-header::after {
        display: none;
    }
}