/* ============================================
   OutboardVS.com — Main Stylesheet
   Clean, professional marine/nautical theme
   ============================================ */

/* === CSS Custom Properties === */
:root {
    /* Colors */
    --color-navy: #1a2332;
    --color-navy-light: #243044;
    --color-ocean: #2c5282;
    --color-ocean-light: #3b6ba5;
    --color-ocean-pale: #e8f0fe;
    --color-sky: #4a90d9;
    --color-accent: #e8a838;
    --color-accent-hover: #d49a2e;
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    --color-green: #28a745;
    --color-green-bg: #d4edda;
    --color-green-light: #e8f5e9;
    --color-red: #dc3545;
    --color-red-bg: #f8d7da;
    --color-red-light: #fce4ec;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-text-muted: #a0aec0;
    --color-link: #2c5282;
    --color-link-hover: #1a3a5c;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --line-height: 1.6;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Layout */
    --container-width: 1200px;
    --container-padding: 1.5rem;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-system);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    color: var(--color-navy);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

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

ul, ol {
    list-style: none;
}

table {
    border-collapse: collapse;
    width: 100%;
}

/* === Container === */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* === Header === */
.site-header {
    background: var(--color-navy);
    color: var(--color-white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-white);
    font-size: var(--font-size-xl);
    font-weight: 800;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    white-space: nowrap;
}

/* Nav Toggle (mobile) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 1px;
    transition: var(--transition);
}

/* Navigation */
.nav-list {
    display: flex;
    align-items: center;
    gap: 0;
}

.nav-list > li > a,
.nav-dropdown-toggle {
    display: block;
    padding: var(--space-md) var(--space-lg);
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition), background var(--transition);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

.nav-list > li > a:hover,
.nav-dropdown-toggle:hover,
.nav-dropdown:hover > .nav-dropdown-toggle {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--color-white);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    padding: var(--space-sm) 0;
}

.nav-dropdown:hover > .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-menu li a {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: background var(--transition);
}

.nav-dropdown-menu li a:hover {
    background: var(--color-gray-100);
    text-decoration: none;
    color: var(--color-ocean);
}

.nav-dropdown-grid {
    min-width: 300px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: var(--space-sm);
}

.nav-dropdown-grid li a {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
}

/* === Main Content === */
.site-main {
    flex: 1;
}

/* === Hero Section === */
.hero {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-ocean) 100%);
    color: var(--color-white);
    padding: var(--space-3xl) 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-white);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--space-md);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.hero-accent {
    color: var(--color-accent);
}

.hero-tagline {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

.hero-stat {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-xl);
}

.hero-stat strong {
    color: var(--color-accent);
    font-size: var(--font-size-3xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* === Sections === */
.section {
    padding: var(--space-3xl) 0;
}

.section-alt {
    background: var(--color-gray-50);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-2xl);
    font-size: var(--font-size-2xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-ocean);
    margin: var(--space-sm) auto 0;
    border-radius: 2px;
}

/* === Page Header === */
.page-header {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    color: var(--color-white);
    padding: var(--space-2xl) 0;
}

.page-header h1 {
    color: var(--color-white);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: var(--space-sm);
}

.page-intro {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-lg);
    max-width: 700px;
}

.page-actions {
    margin-top: var(--space-lg);
}

/* === Breadcrumb === */
.breadcrumb {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-md);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    font-family: inherit;
    text-align: center;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.5;
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-primary:hover {
    background: var(--color-ocean-light);
    border-color: var(--color-ocean-light);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-ocean);
    border-color: var(--color-ocean);
}

.btn-outline:hover {
    background: var(--color-ocean);
    color: var(--color-white);
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: var(--font-size-base);
}

.btn-sm {
    padding: 0.3rem 0.8rem;
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
}

/* === Cards === */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    transition: all var(--transition);
}

.card-hover:hover {
    border-color: var(--color-ocean);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    text-decoration: none;
}

a.card {
    color: inherit;
    display: block;
}

a.card:hover {
    text-decoration: none;
}

.card-body {
    padding: var(--space-lg);
}

.card-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-navy);
}

.card-meta {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.card-specs {
    margin-top: var(--space-sm);
}

.card-specs li {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    padding: 2px 0;
}

.card-specs li strong {
    color: var(--color-text);
}

/* === Card Grid === */
.card-grid {
    display: grid;
    gap: var(--space-lg);
}

.card-grid-2 {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

.card-grid-3 {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.card-grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

/* === Badges === */
.badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.badge-manufacturer {
    background: var(--color-ocean-pale);
    color: var(--color-ocean);
}

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

.badge-type {
    background: var(--color-green-light);
    color: var(--color-green);
}

.card-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

/* === HP Grid === */
.hp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-md);
}

.hp-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) var(--space-md);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all var(--transition);
    text-align: center;
}

.hp-badge:hover {
    border-color: var(--color-ocean);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    text-decoration: none;
}

.hp-badge-value {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-navy);
}

.hp-badge-count {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    margin-top: var(--space-xs);
}

/* === Feature Icons === */
.feature-icon {
    font-size: 2.5rem;
    color: var(--color-ocean);
    margin-bottom: var(--space-md);
}

/* === Tables === */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: var(--space-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-200);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.spec-table thead {
    background: var(--color-navy);
    color: var(--color-white);
}

.spec-table thead th {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.spec-table tbody td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
    vertical-align: middle;
}

.spec-table tbody tr:last-child td {
    border-bottom: none;
}

.spec-table tbody tr:hover {
    background: var(--color-gray-50);
}

.spec-table a {
    font-weight: 500;
}

/* Detail spec table */
.spec-table-detail th {
    background: var(--color-gray-50);
    font-weight: 600;
    color: var(--color-navy);
    width: 35%;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
    text-align: left;
    font-size: var(--font-size-sm);
}

.spec-table-detail td {
    width: 65%;
}

/* HP group multi-column table */
.hp-group-table {
    font-size: var(--font-size-xs);
}

.hp-group-table th,
.hp-group-table td {
    min-width: 130px;
    text-align: center;
}

.hp-group-table td:first-child,
.hp-group-table th:first-child {
    text-align: left;
    position: sticky;
    left: 0;
    background: var(--color-white);
    z-index: 1;
    min-width: 140px;
}

.hp-group-table thead th:first-child {
    background: var(--color-navy);
}

.hp-group-table tbody tr:hover td:first-child {
    background: var(--color-gray-50);
}

/* === Comparison Table === */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.compare-table thead {
    background: var(--color-navy);
    color: var(--color-white);
}

.compare-table thead th {
    padding: var(--space-md) var(--space-lg);
    font-weight: 600;
    text-align: center;
    font-size: var(--font-size-sm);
}

.compare-label-col {
    text-align: left !important;
    width: 25%;
}

.compare-val-col {
    width: 37.5%;
}

.compare-table tbody td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
    text-align: center;
}

.compare-table tbody td.compare-label {
    text-align: left;
    font-weight: 600;
    color: var(--color-navy);
    background: var(--color-gray-50);
}

.compare-table tbody tr:last-child td {
    border-bottom: none;
}

.compare-table tbody tr:hover {
    background: var(--color-gray-50);
}

/* Comparison highlighting */
.compare-better {
    background-color: var(--color-green-light) !important;
    color: #1b5e20;
    font-weight: 600;
}

.compare-worse {
    background-color: var(--color-red-light) !important;
    color: #b71c1c;
}

.compare-equal {
    background-color: var(--color-gray-50) !important;
}

/* Compare legend */
.compare-legend {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin: var(--space-lg) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.legend-swatch {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 3px;
    border: 1px solid var(--color-gray-300);
}

.legend-better { background: var(--color-green-light); }
.legend-worse { background: var(--color-red-light); }
.legend-equal { background: var(--color-gray-100); }

/* === Compare Header === */
.compare-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.compare-header-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-gray-200);
}

.compare-header-card a {
    color: inherit;
    text-decoration: none;
}

.compare-header-card a:hover {
    text-decoration: none;
}

.compare-header-card h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-xs);
}

.compare-year {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin: 0;
}

.compare-vs,
.vs-badge {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-ocean);
    padding: var(--space-md);
    background: var(--color-ocean-pale);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.vs-badge {
    display: inline-flex;
    font-size: var(--font-size-sm);
    width: 36px;
    height: 36px;
    vertical-align: middle;
    margin: 0 var(--space-sm);
}

.vs-small {
    color: var(--color-ocean);
    font-weight: 700;
    padding: 0 var(--space-xs);
}

/* === Comparison Text === */
.comparison-text {
    max-width: 800px;
    margin: var(--space-2xl) auto;
    padding: var(--space-xl);
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-ocean);
}

.comparison-text h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-lg);
}

.comparison-text p {
    color: var(--color-text);
    line-height: 1.7;
}

/* === Comparison Links Grid === */
.comparison-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
}

.comparison-link {
    display: block;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: all var(--transition);
}

.comparison-link:hover {
    border-color: var(--color-ocean);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: var(--color-ocean);
}

/* === Detail Layout === */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--space-2xl);
    align-items: start;
}

.detail-main h2 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.detail-main h2:first-child {
    margin-top: 0;
}

.engine-description {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-200);
}

.engine-description p {
    line-height: 1.7;
    color: var(--color-text);
}

/* === Sidebar === */
.sidebar-card {
    background: var(--color-gray-50);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-gray-200);
}

.sidebar-card h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-ocean);
}

.sidebar-list li {
    margin-bottom: var(--space-sm);
}

.sidebar-list li a {
    display: block;
    padding: var(--space-sm);
    border-radius: var(--border-radius-sm);
    transition: background var(--transition);
    font-size: var(--font-size-sm);
}

.sidebar-list li a:hover {
    background: var(--color-white);
    text-decoration: none;
}

.sidebar-meta {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

/* === Quick Stats === */
.quick-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.stat {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-white);
    border-radius: var(--border-radius-sm);
}

.stat-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-navy);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-xs);
}

/* === Filter Bar === */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-gray-50);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-200);
    margin-bottom: var(--space-xl);
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex: 1;
    min-width: 140px;
}

.filter-group label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-group select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-white);
    cursor: pointer;
    appearance: auto;
}

.filter-group select:focus {
    outline: none;
    border-color: var(--color-ocean);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.15);
}

.filter-actions {
    flex-direction: row;
    align-items: flex-end;
    gap: var(--space-sm);
    min-width: auto;
}

.result-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

/* === Engine Groups === */
.engine-group {
    margin-bottom: var(--space-2xl);
}

.group-title {
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-gray-200);
}

.group-title a {
    color: inherit;
}

.group-title a:hover {
    color: var(--color-ocean);
}

.group-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 400;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    color: var(--color-text-light);
}

.empty-state p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
}

.empty-state-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* === Related Section === */
.related-section {
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-gray-200);
}

.related-section h2 {
    margin-bottom: var(--space-lg);
}

/* === Footer === */
.site-footer {
    background: var(--color-navy);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-col h3 {
    color: var(--color-white);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-md);
}

.footer-col p {
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.footer-col ul li {
    margin-bottom: var(--space-sm);
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    transition: color var(--transition);
}

.footer-col ul li a:hover {
    color: var(--color-white);
    text-decoration: none;
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom p {
    margin: 0;
}

/* === Text Utilities === */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }

/* === Responsive === */
@media (max-width: 1024px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .detail-sidebar {
        order: -1;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-navy);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

    .main-nav.is-open {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        padding: var(--space-md) 0;
    }

    .nav-list > li > a,
    .nav-dropdown-toggle {
        padding: var(--space-md) var(--space-lg);
    }

    .nav-dropdown-menu {
        position: static;
        display: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 0;
    }

    .nav-dropdown.is-open > .nav-dropdown-menu {
        display: block;
    }

    .nav-dropdown-menu li a {
        color: rgba(255, 255, 255, 0.7);
        padding: var(--space-sm) var(--space-2xl);
    }

    .nav-dropdown-menu li a:hover {
        background: rgba(255, 255, 255, 0.1);
        color: var(--color-white);
    }

    .nav-dropdown-grid {
        grid-template-columns: 1fr 1fr;
        min-width: auto;
    }

    .hero {
        padding: var(--space-2xl) 0;
    }

    .hero h1 {
        font-size: var(--font-size-2xl);
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    .card-grid-3 {
        grid-template-columns: 1fr;
    }

    .card-grid-2 {
        grid-template-columns: 1fr;
    }

    .hp-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--space-sm);
    }

    .compare-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .compare-vs {
        margin: 0 auto;
    }

    .comparison-links {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
    }

    .filter-group {
        min-width: 100%;
    }

    .filter-actions {
        flex-direction: row;
        min-width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .compare-legend {
        flex-direction: column;
        align-items: center;
    }

    .quick-stats {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }

    .hero-stat strong {
        font-size: var(--font-size-2xl);
    }

    .card-body {
        padding: var(--space-md);
    }

    .spec-table thead th,
    .spec-table tbody td {
        padding: var(--space-sm) var(--space-md);
    }

    .compare-table thead th,
    .compare-table tbody td {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-xs);
    }

    .quick-stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-sm);
    }

    .stat {
        padding: var(--space-sm);
    }

    .stat-value {
        font-size: var(--font-size-xl);
    }
}

/* === Print Styles === */
@media print {
    .site-header,
    .site-footer,
    .nav-toggle,
    .hero-actions,
    .page-actions,
    .filter-bar,
    .card-actions,
    .btn {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
        font-size: 12pt;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .page-header {
        background: none !important;
        color: #000 !important;
        padding: 0 0 1rem;
        border-bottom: 2px solid #000;
    }

    .page-header h1 {
        color: #000 !important;
    }

    .page-intro {
        color: #333 !important;
    }

    .breadcrumb {
        color: #666 !important;
    }

    .breadcrumb a {
        color: #666 !important;
    }

    .section {
        padding: 1rem 0;
    }

    .card {
        border: 1px solid #ccc;
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .card-hover:hover {
        box-shadow: none;
        transform: none;
    }

    .spec-table,
    .compare-table {
        border: 1px solid #ccc;
    }

    .spec-table thead,
    .compare-table thead {
        background: #eee !important;
        color: #000 !important;
    }

    .compare-better {
        background: #e8f5e9 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .compare-worse {
        background: #fce4ec !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }

    .comparison-text {
        border-left: 3px solid #000;
        background: none;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }

    .sidebar-list a[href]::after,
    .nav-list a[href]::after,
    .card a[href]::after {
        content: none;
    }
}

/* === Motor SVG Images === */
.motor-image {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    padding: 10px;
    overflow: hidden;
}

.motor-image svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Engine detail page - large hero image */
.engine-hero {
    margin-bottom: var(--space-xl);
}

.engine-hero .motor-image {
    max-width: 320px;
    margin: 0 auto var(--space-lg);
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
    box-shadow: var(--shadow-sm);
}

/* Compare page - medium images in header cards */
.compare-header-card .motor-image {
    max-width: 200px;
    margin: 0 auto var(--space-md);
    padding: var(--space-sm);
}

/* Engine cards - standard motor images */
.engine-card .motor-image {
    max-width: 140px;
    margin: 0 auto var(--space-sm);
    padding: var(--space-sm);
    background: linear-gradient(135deg, #f8f9fa 0%, #edf2f7 100%);
}

/* Small motor images in comparison links */
.engine-card--small .motor-image {
    max-width: 80px;
    padding: 4px;
    background: transparent;
}

/* Comparison link with motor images */
.comparison-link-motors {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.comparison-link-motors .vs-small {
    flex-shrink: 0;
}

.comparison-link-names {
    display: block;
    text-align: center;
    font-size: var(--font-size-sm);
}

/* Browse table - tiny inline motor images */
.browse-engine-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.browse-engine-row .motor-image {
    flex-shrink: 0;
    width: 48px;
    height: 58px;
    padding: 2px;
    background: transparent;
    border-radius: var(--border-radius-sm);
}

/* Responsive adjustments for motor images */
@media (max-width: 768px) {
    .engine-hero .motor-image {
        max-width: 240px;
    }

    .compare-header-card .motor-image {
        max-width: 150px;
    }

    .engine-card .motor-image {
        max-width: 120px;
    }

    .engine-card--small .motor-image {
        max-width: 60px;
    }

    .browse-engine-row .motor-image {
        display: none;
    }
}

@media (max-width: 480px) {
    .engine-hero .motor-image {
        max-width: 200px;
        padding: var(--space-sm);
    }

    .comparison-link-motors {
        display: none;
    }
}

/* === Accessibility === */
:focus-visible {
    outline: 3px solid var(--color-ocean);
    outline-offset: 2px;
}

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

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* === Selection Color === */
::selection {
    background: var(--color-ocean-pale);
    color: var(--color-navy);
}