/* ===================================
   Portable Charger Australia - Styles
   Modern, Clean, Professional UI
   =================================== */

/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --accent-dark: #d97706;

    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --text-light: #9ca3af;

    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-dark: #111827;

    --border-light: #e5e7eb;
    --border-medium: #d1d5db;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

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

.btn-buy {
    background: var(--accent);
    color: var(--text-primary);
    width: 100%;
    font-weight: 600;
}

.btn-buy:hover {
    background: var(--accent-dark);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    font-size: 1.25rem;
}

/* Header & Navigation */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo:hover {
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-au {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: white;
        padding: 1rem;
        gap: 0;
        border-bottom: 1px solid var(--border-light);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 1rem;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-menu a:last-child {
        border-bottom: none;
    }
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: var(--radius-xl);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-xl);
}

/* Animated Battery Icon */
.battery-icon {
    display: flex;
    align-items: center;
    transform: scale(2);
}

.battery-body {
    width: 60px;
    height: 30px;
    border: 3px solid white;
    border-radius: 4px;
    padding: 3px;
    position: relative;
    overflow: hidden;
}

.battery-level {
    height: 100%;
    background: white;
    border-radius: 2px;
    animation: charge 2s ease-in-out infinite;
}

@keyframes charge {
    0%, 100% { width: 20%; }
    50% { width: 100%; }
}

.battery-tip {
    width: 6px;
    height: 12px;
    background: white;
    border-radius: 0 2px 2px 0;
    margin-left: 2px;
}

@media (max-width: 768px) {
    .hero {
        padding: 2rem 0;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .hero-image-placeholder {
        max-width: 250px;
    }
}

/* Features Bar */
.features-bar {
    background: var(--bg-dark);
    padding: 1.25rem 0;
}

.features-bar .container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
}

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

@media (max-width: 768px) {
    .features-bar .container {
        justify-content: center;
    }

    .feature {
        flex: 0 0 45%;
        justify-content: center;
    }
}

/* Section Styling */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* Products Section */
.products {
    padding: 5rem 0;
}

.product-filters {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.625rem 1.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.product-card {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-card.hidden {
    display: none;
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 10;
}

.product-badge.best-value {
    background: var(--secondary);
}

.product-badge.budget {
    background: var(--accent);
    color: var(--text-primary);
}

.product-badge.camping {
    background: #16a34a;
}

.product-image {
    padding: 1.5rem;
    background: var(--bg-secondary);
}

.product-placeholder {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #374151, #1f2937);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.product-placeholder.samsung {
    background: linear-gradient(135deg, #1428a0, #0d1b69);
}

.product-placeholder.xiaomi {
    background: linear-gradient(135deg, #ff6900, #cc5400);
}

.product-placeholder.belkin {
    background: linear-gradient(135deg, #00a651, #007a3d);
}

.product-placeholder.goalzero {
    background: linear-gradient(135deg, #ffd100, #ccaa00);
}

.product-placeholder.iniu {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.product-placeholder.magsafe {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
}

.product-placeholder.jackery {
    background: linear-gradient(135deg, #f97316, #ea580c);
}

.capacity-display {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.product-content {
    padding: 1.5rem;
}

.product-brand {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.product-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

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

.rating-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.product-features {
    margin-bottom: 1.25rem;
}

.product-features li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.25rem 0;
}

.product-price {
    margin-bottom: 1rem;
}

.price-current {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-original {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-left: 0.5rem;
}

.products-cta {
    text-align: center;
}

/* Comparison Table Section */
.compare {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.table-controls {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

.table-filter {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.table-filter select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: white;
    cursor: pointer;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
}

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

.comparison-table th {
    background: var(--bg-dark);
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.comparison-table tbody tr:hover {
    background: var(--bg-secondary);
}

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

.comparison-table td {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.comparison-table td strong {
    color: var(--text-primary);
    font-weight: 600;
}

.table-stars {
    color: var(--accent);
}

.table-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

.table-btn:hover {
    background: var(--primary-dark);
    color: white;
}

@media (max-width: 768px) {
    .comparison-table thead {
        display: none;
    }

    .comparison-table tbody tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        overflow: hidden;
    }

    .comparison-table td {
        display: flex;
        justify-content: space-between;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--border-light);
    }

    .comparison-table td:last-child {
        border-bottom: none;
    }

    .comparison-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-primary);
    }
}

/* Quiz Section */
.quiz {
    padding: 5rem 0;
}

.quiz-container {
    max-width: 700px;
    margin: 0 auto;
}

.quiz-question {
    display: none;
    animation: fadeIn 0.3s ease;
}

.quiz-question.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.question-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background: var(--primary);
    border-radius: var(--radius-full);
    position: relative;
}

.progress-bar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--border-light);
    border-radius: var(--radius-full);
    z-index: -1;
}

.question-progress span {
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.quiz-question h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.quiz-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.quiz-option:hover {
    border-color: var(--primary);
    background: var(--bg-secondary);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
}

.option-icon {
    font-size: 2rem;
}

.option-text {
    font-weight: 500;
    color: var(--text-primary);
}

@media (max-width: 480px) {
    .quiz-options {
        grid-template-columns: 1fr;
    }
}

/* Quiz Results */
.quiz-results {
    display: none;
    text-align: center;
    animation: fadeIn 0.4s ease;
}

.quiz-results.active {
    display: block;
}

.results-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.quiz-results h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

.result-product {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}

.result-product h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.result-product p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.result-product .btn-buy {
    max-width: 300px;
    margin: 0 auto;
}

/* Guide Section */
.guide {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.guide-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.guide-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.guide-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.guide-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.guide-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.guide-card ul {
    list-style: none;
}

.guide-card li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.375rem 0;
    border-bottom: 1px solid var(--border-light);
}

.guide-card li:last-child {
    border-bottom: none;
}

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

/* SEO Content Section */
.seo-content {
    padding: 5rem 0;
    background: var(--bg-primary);
}

.seo-content-inner {
    max-width: 800px;
    margin: 0 auto;
}

.seo-content h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.seo-content h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
}

.seo-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.footer-logo:hover {
    color: white;
}

.footer-about p {
    color: var(--text-light);
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-links h4 {
    color: white;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.affiliate-disclosure {
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    max-width: 700px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .footer-about {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-about {
        grid-column: span 1;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Smooth scroll offset for sticky header */
section[id] {
    scroll-margin-top: 80px;
}

/* Print Styles */
@media print {
    .header,
    .hero-cta,
    .product-filters,
    .quiz,
    .footer {
        display: none;
    }

    .product-card {
        break-inside: avoid;
    }
}