/**
 * USIFDA OEM Standards - Shared Styles
 * Fuel Contamination Remediation Guidelines
 */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;700&family=Barlow:wght@400;500;600;700&display=swap');

:root {
    --primary: #1a1a1a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --success: #16a34a;
    --accent: #0369a1;
    --surface: #f8fafc;
    --surface-alt: #f1f5f9;
    --border: #e2e8f0;
    --text: #334155;
    --text-dark: #0f172a;
    --text-light: #64748b;
    
    /* OEM specific colors */
    --oem-primary: #0c4a6e;
    --oem-secondary: #075985;
    --oem-accent: #0284c7;
    --oem-light: #e0f2fe;
}

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

body {
    font-family: 'Barlow', sans-serif;
    background: var(--surface);
    color: var(--text);
    line-height: 1.7;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d3748 100%);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
}

.logo-text {
    color: white;
    font-family: 'Oswald', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo-text .nz { color: #fff; }
.logo-text .if { color: #dc2626; }
.logo-text .da { color: #3b82f6; }

.logo-subtitle {
    font-size: 0.7rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-top: 2px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--danger);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary);
    padding: 1rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.mobile-nav.active {
    display: block;
}

.mobile-nav a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mobile-nav a:hover {
    background: rgba(255,255,255,0.1);
    color: var(--danger);
}

@media (max-width: 900px) {
    .nav-links { display: none; }
    .mobile-menu-toggle { display: block; }
}

/* Page Header */
.page-header {
    margin-top: 80px;
    background: linear-gradient(135deg, var(--oem-primary) 0%, var(--oem-secondary) 100%);
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
}

.page-header-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-family: 'Oswald', sans-serif;
    font-size: 2.5rem;
    color: white;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.page-header .subtitle {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
}

/* Breadcrumb */
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--oem-accent);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb .separator {
    color: var(--text-light);
}

.breadcrumb .current {
    color: var(--text-dark);
    font-weight: 600;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Manufacturer Position Banner */
.manufacturer-position {
    background: linear-gradient(135deg, #fef3c7 0%, #fef9c3 100%);
    border: 2px solid #f59e0b;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.manufacturer-position h2 {
    font-family: 'Oswald', sans-serif;
    color: #92400e;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.manufacturer-position p {
    color: #78350f;
    margin-bottom: 0.75rem;
}

.manufacturer-position p:last-child {
    margin-bottom: 0;
}

/* Info Cards */
.info-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.info-card h2 {
    font-family: 'Oswald', sans-serif;
    color: var(--text-dark);
    font-size: 1.6rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--oem-accent);
}

.info-card h3 {
    font-family: 'Oswald', sans-serif;
    color: var(--text-dark);
    font-size: 1.25rem;
    margin: 1.5rem 0 0.75rem;
}

/* Manufacturer Grid */
.manufacturer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.manufacturer-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    color: inherit;
    display: block;
    border: 2px solid transparent;
}

.manufacturer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
    border-color: var(--oem-accent);
}

.manufacturer-card h3 {
    font-family: 'Oswald', sans-serif;
    color: var(--text-dark);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.manufacturer-card .brand-count {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.manufacturer-card .brands-list {
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.5;
}

/* Brand List */
.brand-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.brand-item {
    background: white;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: all 0.3s;
    text-decoration: none;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid var(--border);
}

.brand-item:hover {
    background: var(--oem-light);
    border-color: var(--oem-accent);
    transform: translateX(5px);
}

.brand-item .brand-icon {
    width: 40px;
    height: 40px;
    background: var(--surface-alt);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--oem-primary);
}

.brand-item .brand-name {
    font-weight: 600;
}

/* Method Cards */
.method-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 5px solid var(--success);
}

.method-card.not-approved {
    border-left-color: var(--danger);
    background: #fef2f2;
}

.method-card h3 {
    font-family: 'Oswald', sans-serif;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.method-card.not-approved h3 {
    color: var(--danger);
}

/* Specs Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.specs-table th,
.specs-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.specs-table th {
    background: var(--surface-alt);
    font-weight: 600;
    color: var(--text-dark);
    width: 40%;
}

.specs-table tr:hover {
    background: var(--surface);
}

/* Procedure Steps */
.procedure-steps {
    counter-reset: step;
    list-style: none;
    margin: 1.5rem 0;
}

.procedure-steps li {
    position: relative;
    padding-left: 3.5rem;
    margin-bottom: 1rem;
    min-height: 2rem;
}

.procedure-steps li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: var(--oem-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

/* Warning Box */
.warning-box {
    background: #fef2f2;
    border: 2px solid var(--danger);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.warning-box h4 {
    color: var(--danger);
    font-family: 'Oswald', sans-serif;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Quote Box */
.quote-box {
    background: var(--surface-alt);
    border-left: 4px solid var(--oem-accent);
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
}

.quote-box .source {
    font-style: normal;
    font-weight: 600;
    margin-top: 0.75rem;
    color: var(--text-dark);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--oem-primary) 0%, var(--oem-secondary) 100%);
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    margin-top: 3rem;
}

.cta-section h2 {
    font-family: 'Oswald', sans-serif;
    color: white;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.cta-section p {
    color: rgba(255,255,255,0.9);
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 8px;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #b91c1c;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--surface);
}

/* Footer */
.footer {
    background: var(--primary);
    color: white;
    padding: 3rem 2rem 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.footer-section h3 {
    font-family: 'Oswald', sans-serif;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--danger);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    margin-top: 2rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-disclaimer {
    max-width: 800px;
    margin: 0 auto;
    padding: 1.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    color: #94a3b8;
}

/* Print Styles */
@media print {
    .header, .footer, .cta-section, .mobile-nav {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .page-header {
        margin-top: 0;
        background: white;
        color: black;
        padding: 1rem 0;
        border-bottom: 2px solid black;
    }
    
    .page-header h1, .page-header .subtitle {
        color: black;
    }
    
    .main-content {
        padding: 0;
    }
    
    .info-card, .method-card, .manufacturer-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .page-header {
        padding: 2rem 1rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 0 1rem;
    }
    
    .manufacturer-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-list {
        grid-template-columns: 1fr;
    }
    
    .specs-table th {
        width: 35%;
    }
    
    .cta-section {
        padding: 1.5rem;
    }
}

/* Model Cards */
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.model-card {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: all 0.3s;
    text-decoration: none;
    color: var(--text-dark);
    border: 1px solid var(--border);
}

.model-card:hover {
    background: var(--oem-light);
    border-color: var(--oem-accent);
    transform: translateY(-3px);
}

.model-card .model-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.model-card .fuel-types {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Warranty Notice */
.warranty-notice {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid var(--success);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.warranty-notice h4 {
    color: var(--success);
    font-family: 'Oswald', sans-serif;
    margin-bottom: 0.5rem;
}

/* Search Box */
.search-box {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-family: 'Barlow', sans-serif;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--oem-accent);
}

/* Alphabetical Index */
.alpha-index {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
}

.alpha-index a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: var(--surface-alt);
    border-radius: 4px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    transition: all 0.3s;
}

.alpha-index a:hover,
.alpha-index a.active {
    background: var(--oem-accent);
    color: white;
}

/* Sub-brand indicator */
.sub-brand-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--oem-light);
    color: var(--oem-primary);
    font-size: 0.75rem;
    border-radius: 4px;
    margin-left: 0.5rem;
}

/* Status indicators */
.status-approved {
    color: var(--success);
}

.status-not-approved {
    color: var(--danger);
}

/* Technical highlight */
.tech-highlight {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}

.tech-highlight .keyword {
    color: #f472b6;
}

.tech-highlight .value {
    color: #4ade80;
}