:root {
    --color-primary: #2D6A4F;
    --color-primary-dark: #1B4332;
    --color-secondary: #F4F1DE;
    --color-accent: #E07A5F;
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;
    --color-border: #E5E7EB;
    --color-success: #10B981;
    --color-error: #EF4444;
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --transition: 0.2s ease;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }

.skip-link {
    position: absolute; left: -9999px; top: 0;
    background: var(--color-primary); color: white;
    padding: var(--spacing-sm); z-index: 100;
}
.skip-link:focus { left: 0; }

.site-header {
    background: white;
    border-bottom: 1px solid var(--color-border);
    position: sticky; top: 0; z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: var(--spacing-sm) var(--spacing-md); }
.logo { display: flex; align-items: center; gap: var(--spacing-xs); text-decoration: none; color: var(--color-primary); font-weight: 700; font-size: 1.25rem; }

.main-nav ul { display: flex; list-style: none; gap: var(--spacing-md); }
.main-nav a { text-decoration: none; color: var(--color-text); font-weight: 500; padding: var(--spacing-xs); border-radius: var(--radius-sm); transition: var(--transition); }
.main-nav a:hover, .main-nav a.active { color: var(--color-primary); background: var(--color-secondary); }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: var(--spacing-xs); }
.menu-icon { display: block; width: 24px; height: 2px; background: var(--color-text); position: relative; }
.menu-icon::before, .menu-icon::after { content: ''; position: absolute; width: 24px; height: 2px; background: var(--color-text); left: 0; }
.menu-icon::before { top: -6px; }
.menu-icon::after { top: 6px; }

.hero {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0;
}
.hero-inner { text-align: center; }
.hero h1 { font-size: 2.5rem; margin-bottom: var(--spacing-sm); }
.hero p { font-size: 1.2rem; margin-bottom: var(--spacing-lg); max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; }

.section { padding: var(--spacing-xl) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-title { text-align: center; font-size: 2rem; margin-bottom: var(--spacing-lg); }
.page-title { font-size: 2rem; margin-bottom: var(--spacing-md); }

.benefits-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-md); }
.benefit-card { background: white; padding: var(--spacing-lg); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); text-align: center; }
.benefit-card h3 { color: var(--color-primary); margin-bottom: var(--spacing-xs); }

.dog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-md); margin-bottom: var(--spacing-lg); }
.dog-card { background: white; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.dog-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.dog-card img { width: 100%; height: 200px; object-fit: cover; }
.dog-card-body { padding: var(--spacing-md); }
.dog-card h2, .dog-card h3 { margin-bottom: var(--spacing-xs); }
.dog-meta { color: var(--color-text-light); font-size: 0.9rem; margin-bottom: var(--spacing-xs); }
.dog-excerpt { margin-bottom: var(--spacing-sm); }
.dog-tags { display: flex; gap: var(--spacing-xs); margin-bottom: var(--spacing-sm); flex-wrap: wrap; }
.tag { background: var(--color-secondary); color: var(--color-primary); padding: 2px 8px; border-radius: 20px; font-size: 0.8rem; }

.btn { display: inline-block; padding: 0.6rem 1.5rem; border-radius: var(--radius-md); text-decoration: none; font-weight: 600; cursor: pointer; border: 2px solid transparent; transition: var(--transition); font-size: 1rem; }
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: transparent; color: white; border-color: white; }
.btn-secondary:hover { background: rgba(255,255,255,0.1); }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: white; }
.btn-large { padding: 0.8rem 2rem; font-size: 1.1rem; }

.center { text-align: center; }

.filter-form { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; align-items: flex-end; margin-bottom: var(--spacing-lg); background: var(--color-bg-alt); padding: var(--spacing-md); border-radius: var(--radius-md); }
.filter-row { display: flex; flex-direction: column; gap: 4px; }
.filter-row label { font-size: 0.9rem; font-weight: 600; }
.filter-row input, .filter-row select { padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 1rem; }
.filter-checkbox { flex-direction: row; align-items: center; gap: var(--spacing-xs); }

.form-container { max-width: 600px; }
.form-group { margin-bottom: var(--spacing-md); }
.form-group label { display: block; margin-bottom: 4px; font-weight: 600; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.6rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 1rem; font-family: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.form-checkbox { display: flex; align-items: center; gap: var(--spacing-xs); }
.form-checkbox input { width: auto; }
.form-checkbox label { margin-bottom: 0; }

.alert { padding: var(--spacing-sm); border-radius: var(--radius-sm); margin-bottom: var(--spacing-sm); }
.alert-success { background: #D1FAE5; color: #065F46; border: 1px solid var(--color-success); }
.alert-error { background: #FEE2E2; color: #991B1B; border: 1px solid var(--color-error); }
.flash-container { margin-top: var(--spacing-sm); }

.empty-state { text-align: center; padding: var(--spacing-xl); background: var(--color-bg-alt); border-radius: var(--radius-md); }

.dog-detail { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); align-items: start; }
.dog-detail-image img { width: 100%; border-radius: var(--radius-lg); }
.dog-detail-info h1 { font-size: 2rem; margin-bottom: var(--spacing-xs); }
.dog-detail-info p { margin-bottom: var(--spacing-sm); }

.breadcrumb { margin-bottom: var(--spacing-md); font-size: 0.9rem; }
.breadcrumb a { color: var(--color-primary); text-decoration: none; }

.about-content h2 { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-xs); color: var(--color-primary); }
.about-content ul, .about-content ol { margin-left: var(--spacing-lg); margin-bottom: var(--spacing-sm); }

.cta-section { background: var(--color-accent); color: white; }
.cta-section h2 { margin-bottom: var(--spacing-sm); }
.cta-section p { margin-bottom: var(--spacing-lg); }

.confirmation p { margin-bottom: var(--spacing-sm); }

.site-footer { background: var(--color-primary-dark); color: white; padding: var(--spacing-xl) 0 var(--spacing-sm); }
.footer-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.footer-col h3 { margin-bottom: var(--spacing-xs); }
.footer-col ul { list-style: none; }
.footer-col a { color: white; text-decoration: none; }
.footer-col a:hover { text-decoration: underline; }
.footer-bottom { text-align: center; border-top: 1px solid rgba(255,255,255,0.2); padding-top: var(--spacing-sm); font-size: 0.9rem; }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: white; border-bottom: 1px solid var(--color-border); }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; padding: var(--spacing-sm); gap: var(--spacing-xs); }
    .main-nav a { display: block; padding: var(--spacing-sm); }
    .hero h1 { font-size: 1.8rem; }
    .dog-detail { grid-template-columns: 1fr; }
    .filter-form { flex-direction: column; align-items: stretch; }
}