/* ============================================
   PROFESSIONAL DESIGN SYSTEM
   Clean, Clear, Crisp, Production-Quality
   ============================================ */

:root {
    /* Professional Color Palette */
    --color-primary: #1a1a1a;
    --color-secondary: #2563eb;
    --color-accent: #10b981;
    --color-background: #ffffff;
    --color-surface: #f9fafb;
    --color-text: #111827;
    --color-text-secondary: #4b5563;
    --color-text-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    
    /* Typography Scale */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', 'Helvetica Neue', sans-serif;
    --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;
    --font-size-5xl: 3rem;
    
    /* Spacing Scale (8px base) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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);
    
    /* Transitions */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
}

/* Skip to main content link - Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-background);
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    z-index: 100;
    font-weight: 600;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
}

h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h3 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    line-height: 1.3;
}

h4 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    line-height: 1.4;
}

p {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: var(--space-4) 0;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

.header__logo span {
    color: var(--color-secondary);
}

.nav {
    display: flex;
    gap: var(--space-8);
    align-items: center;
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav__cta {
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.nav__cta:hover {
    background: var(--color-secondary);
    color: var(--color-background);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

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

/* Hero Section */
.hero {
    padding: var(--space-24) 0;
    background: var(--color-background);
    text-align: center;
}

.hero__eyebrow {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-secondary);
    margin-bottom: var(--space-4);
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--color-text);
    margin-bottom: var(--space-6);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero__cta {
    display: inline-block;
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.hero__cta:hover {
    background: var(--color-secondary);
    color: var(--color-background);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Trust Bar */
.trust-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-6) 0;
    margin: var(--space-8) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.trust-item__icon {
    color: var(--color-accent);
    font-weight: 700;
}

/* Section */
.section {
    padding: var(--space-20) 0;
}

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

.section__header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Software Grid */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-10);
    margin-top: var(--space-8);
}

/* Software Card */
.software-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
    position: relative;
}

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

/* Top Pick Card */
.software-card--top-pick {
    border: 2px solid var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.software-card__badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--color-secondary);
    color: var(--color-background);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.software-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.software-card__logo {
    width: 48px;
    height: 48px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.software-card__name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
}

.software-card__rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.software-card__stars {
    color: #fbbf24;
    font-size: var(--font-size-lg);
}

.software-card__score {
    font-weight: 600;
    color: var(--color-text);
}

.software-card__tagline {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
}

.software-card__features {
    list-style: none;
    margin-bottom: var(--space-6);
}

.software-card__features li {
    padding: var(--space-1) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.software-card__features li::before {
    content: "✓";
    color: var(--color-accent);
    font-weight: 700;
    margin-right: var(--space-2);
}

.software-card__pricing {
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
}

.software-card__cta {
    display: block;
    width: 100%;
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.software-card__cta:hover {
    background: var(--color-secondary);
    color: var(--color-background);
}

/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
    margin: var(--space-8) 0;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table thead {
    background: var(--color-surface);
}

.comparison-table th {
    padding: var(--space-4);
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
}

.comparison-table td {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

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

.comparison-table .check {
    color: var(--color-accent);
    font-weight: 700;
}

.comparison-table .cross {
    color: var(--color-text-muted);
}

.comparison-table .recommended {
    background: var(--color-surface);
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--space-6);
    padding: var(--space-6);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    margin: var(--space-12) 0;
}

.author-box__avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    flex-shrink: 0;
}

.author-box__content {
    flex: 1;
}

.author-box__name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.author-box__credentials {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

.author-box__bio {
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Methodology Grid */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.methodology-item {
    padding: var(--space-6);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.methodology-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--color-secondary);
}

.methodology-item p {
    color: var(--color-text-secondary);
    margin: 0;
    font-size: var(--font-size-sm);
}

/* Footer */
.footer {
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--space-12) 0 var(--space-6);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer__column h4 {
    color: var(--color-background);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-base);
    font-weight: 600;
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--space-2);
}

.footer__links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-background);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-6);
    text-align: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
}

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

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

.btn--secondary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

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

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: var(--font-size-4xl);
    }
    
    h2 {
        font-size: var(--font-size-3xl);
    }
    
    .hero {
        padding: var(--space-16) 0;
    }
    
    .hero__title {
        font-size: var(--font-size-4xl);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-background);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-2);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }
    
    .nav.nav--open {
        display: flex;
    }
    
    .trust-bar {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .software-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        font-size: var(--font-size-xs);
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--space-2);
    }
    
    .author-box {
        flex-direction: column;
    }
    
    .methodology-grid {
        grid-template-columns: 1fr;
    }
}

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

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   IMAGERY & VISUAL DESIGN
   ============================================ */

/* Hero with Background Image */
.hero--with-image {
    position: relative;
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.5)), url('../images/optimized/hero-detailing.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    padding: var(--space-24) 0;
    min-height: 500px;
    display: flex;
    align-items: center;
}

.hero--with-image .hero__eyebrow,
.hero--with-image .hero__title,
.hero--with-image .hero__subtitle {
    color: white;
}

.hero--with-image .hero__eyebrow {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.hero--with-image .hero__cta {
    background: white;
    color: var(--color-primary);
}

.hero--with-image .hero__cta:hover {
    background: var(--color-surface);
}

/* Responsive Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.responsive-img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* Visual Showcase Section */
.visual-showcase {
    padding: var(--space-16) 0;
    background: var(--color-surface);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-12);
    margin-top: var(--space-12);
}

.showcase-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    filter: brightness(0.85) contrast(1.1);
}

.showcase-item:hover img {
    transform: scale(1.05);
}

.showcase-item__overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-8);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
    color: white;
}

.showcase-item__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: #ffffff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 1), 0 1px 5px rgba(0, 0, 0, 1);
}

.showcase-item__description {
    font-size: var(--font-size-lg);
    opacity: 1;
    color: #ffffff;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 1);
}

/* Methodology Visual Enhancement */
.methodology-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    margin-top: var(--space-12);
}

.methodology-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
}

.methodology-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.methodology-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero--with-image {
        padding: var(--space-16) 0;
        min-height: 400px;
    }
    
    .methodology-visual {
        grid-template-columns: 1fr;
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
    }
}