/**
 * Modern Warranty System - Responsive Stylesheet
 * Mobile-first design with breakpoints for tablet and desktop
 */

/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Brand Colors */
    --color-primary: #0053a0;
    --color-primary-dark: #003d75;
    --color-primary-light: #1a6bb5;
    --color-secondary: #f5f5f5;
    --color-accent: #ff6b35;

    /* Semantic Colors */
    --color-success: #28a745;
    --color-success-light: #d4edda;
    --color-error: #dc3545;
    --color-error-light: #f8d7da;
    --color-warning: #ffc107;
    --color-warning-light: #fff3cd;
    --color-info: #17a2b8;
    --color-info-light: #d1ecf1;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-100: #f8f9fa;
    --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;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-headings: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

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

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1rem;
}

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

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-base);
    line-height: var(--line-height-base);
    color: var(--color-gray-800);
    background-color: var(--color-gray-100);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-headings);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

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

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

ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

strong {
    font-weight: 600;
}

small {
    font-size: 0.875rem;
}

/* ============================================
   Layout Containers
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

.main-content {
    flex: 1;
    padding-bottom: var(--spacing-2xl);
}

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-lg);
}

.logo img {
    height: 50px;
    width: auto;
    display: block;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    gap: var(--spacing-lg);
}

.main-nav a {
    color: var(--color-gray-700);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.main-nav a:hover {
    color: var(--color-primary);
    background-color: var(--color-gray-100);
    text-decoration: none;
}

.main-nav .active a {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: var(--color-white);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--color-gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
}

.hero-content {
    text-align: center;
}

.hero-content h1 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.hero-features-secondary {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.hero-features-secondary .feature-item.fca-badge {
    font-size: 1.15rem;
    font-weight: 600;
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-features-secondary .feature-icon {
    font-size: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    background-color: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.feature-icon {
    font-size: 1.25rem;
    font-weight: bold;
}

/* ============================================
   Card Styles
   ============================================ */
.lookup-card,
.warranty-card,
.info-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.card-header {
    padding: var(--spacing-xl);
    text-align: center;
    border-bottom: 2px solid var(--color-gray-200);
}

.card-header h2 {
    margin-bottom: var(--spacing-sm);
}

.card-header p {
    color: var(--color-gray-600);
    margin-bottom: 0;
}

.card-footer {
    padding: var(--spacing-xl);
    background-color: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-300);
}

/* ============================================
   Forms
   ============================================ */
.lookup-form,
.warranty-form {
    padding: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.required {
    color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: var(--font-family-base);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px; /* Mobile touch target */
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 83, 160, 0.1);
}

.form-input::placeholder {
    color: var(--color-gray-500);
}

.form-help {
    display: block;
    margin-top: var(--spacing-sm);
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.form-actions {
    margin-top: var(--spacing-xl);
    text-align: center;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-family-base);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    line-height: 1.5;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--color-gray-200);
    color: var(--color-gray-800);
}

.btn-secondary:hover {
    background-color: var(--color-gray-300);
    text-decoration: none;
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid;
}

.alert strong {
    display: block;
    margin-bottom: var(--spacing-sm);
}

.alert-error {
    background-color: var(--color-error-light);
    border-left-color: var(--color-error);
    color: #721c24;
}

.alert-success {
    background-color: var(--color-success-light);
    border-left-color: var(--color-success);
    color: #155724;
}

.alert-warning {
    background-color: var(--color-warning-light);
    border-left-color: var(--color-warning);
    color: #856404;
}

.alert-info {
    background-color: var(--color-info-light);
    border-left-color: var(--color-info);
    color: #0c5460;
}

.support-info {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

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

/* ============================================
   Info Boxes
   ============================================ */
.info-box {
    padding: var(--spacing-lg);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.info-box:last-child {
    margin-bottom: 0;
}

.info-box h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.info-box ul {
    margin-left: var(--spacing-lg);
}

.info-box li {
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Benefits Grid
   ============================================ */
.benefits-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.benefit-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-base);
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.benefit-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.benefit-card p {
    color: var(--color-gray-600);
    margin-bottom: 0;
}

/* ============================================
   Trust Section
   ============================================ */
.trust-section {
    background-color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-2xl);
}

.trust-content {
    text-align: center;
}

.trust-content h2 {
    margin-bottom: var(--spacing-xl);
}

.trust-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.trust-item {
    text-align: center;
}

.trust-item strong {
    display: block;
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.trust-item p {
    color: var(--color-gray-600);
    margin-bottom: 0;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-lg) 0;
    margin-top: auto;
}

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

.footer-section h3 {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

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

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.payment-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-gray-800);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.trust-message {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-800);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

.powered-by {
    color: var(--color-gray-500);
}

/* ============================================
   Responsive: Tablet (768px - 1024px)
   ============================================ */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
        --font-size-base: 16px;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }

    .logo img {
        height: 60px;
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .form-row {
        grid-template-columns: 1fr 1fr;
    }

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

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

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

/* ============================================
   Responsive: Desktop (1025px+)
   ============================================ */
@media (min-width: 1025px) {
    :root {
        --container-padding: 2rem;
    }

    .hero-content h1 {
        font-size: 3.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .benefits-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .trust-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   Responsive: Mobile (<768px)
   ============================================ */
@media (max-width: 767px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
    }

    .main-nav.active {
        max-height: 500px;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-md) 0;
    }

    .main-nav li {
        border-bottom: 1px solid var(--color-gray-200);
    }

    .main-nav a {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        border-radius: 0;
    }

    .hero-section {
        padding: var(--spacing-xl) 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-features {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .mobile-menu-toggle {
        display: none;
    }

    .main-content {
        padding: 0;
    }

    .hero-section {
        background: none;
        color: var(--color-black);
    }
}