/* ============================================
   Slip Compare - Main Stylesheet
   White theme with orange/red accents
   SEO-Optimized Version
   ============================================ */

/* Import additional SEO section styles */
@import url('seo-sections.css');

:root {
    /* Colors - Clean White theme with orange/red accents */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-elevated: #f3f4f6;
    --bg-card: #ffffff;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --accent-primary: #ea580c;
    --accent-secondary: #dc2626;
    --accent-glow: rgba(234, 88, 12, 0.1);
    
    --removed: #dc2626;
    --removed-bg: rgba(220, 38, 38, 0.1);
    --added: #16a34a;
    --added-bg: rgba(22, 163, 74, 0.1);
    
    --border-subtle: rgba(0, 0, 0, 0.08);
    --border-medium: rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-display: 'Open Sans', sans-serif;
    --font-mono: 'Open Sans', sans-serif;
    
    /* 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;
    --space-4xl: 6rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Hide noise overlay for clean white theme */
.noise-overlay {
    display: none;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-xl);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo img {
    height: 45px;
    width: auto;
    border-radius: 8px;
}

.logo-icon {
    display: none;
}

.logo-text {
    display: none;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--accent-primary);
}

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

.nav-link.active {
    color: var(--accent-primary);
}

.nav-cta {
    font-size: 0.9rem;
    padding: var(--space-sm) var(--space-lg);
    background: var(--accent-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 86, 168, 0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    padding: calc(80px + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    position: relative;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at top right, var(--accent-glow), transparent 60%);
    pointer-events: none;
}

.hero-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    flex: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    background: var(--accent-glow);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-xl);
    border: 1px solid rgba(26, 86, 168, 0.2);
    font-weight: 600;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--space-xl);
    color: var(--text-primary);
}

.title-line {
    display: block;
}

.title-line.highlight {
    color: var(--accent-primary);
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #c2410c 0%, #b91c1c 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px -10px rgba(234, 88, 12, 0.5);
}

.btn-primary:disabled {
    opacity: 0.8;
    cursor: wait;
    transform: none;
}

/* Button spinner */
.btn-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: btnSpin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes btnSpin {
    to { transform: rotate(360deg); }
}

.btn-primary svg {
    transition: transform var(--transition-fast);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

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

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.1rem;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

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

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-medium);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    z-index: 1;
}

.visual-container {
    position: relative;
    padding: var(--space-xl);
}

.diff-preview {
    background: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 
        0 20px 60px -20px rgba(0, 0, 0, 0.15),
        0 0 0 1px var(--border-subtle);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.preview-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.preview-dots {
    display: flex;
    gap: 6px;
}

.preview-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.preview-dots span:nth-child(1) { background: #ef4444; }
.preview-dots span:nth-child(2) { background: #f59e0b; }
.preview-dots span:nth-child(3) { background: #22c55e; }

.preview-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.preview-content {
    padding: var(--space-lg);
    font-size: 0.9rem;
}

.preview-line {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    margin-bottom: 2px;
    display: flex;
    align-items: center;
}

.line-num {
    color: var(--text-muted);
    margin-right: var(--space-md);
    user-select: none;
    min-width: 20px;
}

.preview-line.unchanged {
    color: var(--text-secondary);
}

.preview-line.removed {
    background: var(--removed-bg);
    color: var(--removed);
    text-decoration: line-through;
}

.preview-line.added {
    background: var(--added-bg);
    color: var(--added);
}

/* Floating Cards */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}

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

.card-1 {
    top: 10%;
    right: -10%;
    animation: floatCard1 5s ease-in-out infinite;
}

.card-2 {
    bottom: 30%;
    left: -5%;
    animation: floatCard2 6s ease-in-out infinite;
}

.card-3 {
    bottom: 5%;
    right: 5%;
    animation: floatCard3 4s ease-in-out infinite;
}

@keyframes floatCard1 {
    0%, 100% { transform: translate(0, 0) rotate(3deg); }
    50% { transform: translate(-5px, -10px) rotate(-2deg); }
}

@keyframes floatCard2 {
    0%, 100% { transform: translate(0, 0) rotate(-2deg); }
    50% { transform: translate(5px, -8px) rotate(3deg); }
}

@keyframes floatCard3 {
    0%, 100% { transform: translate(0, 0) rotate(2deg); }
    50% { transform: translate(-8px, -5px) rotate(-3deg); }
}

/* Scroll Indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    margin-top: auto;
    padding-top: var(--space-2xl);
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-primary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; height: 40px; }
    50% { opacity: 1; height: 60px; }
}

/* ============================================
   Features Preview Section
   ============================================ */
.features-preview {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--bg-secondary);
    position: relative;
}

.features-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-medium), transparent);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
    display: block;
    font-weight: 600;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.feature-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -20px rgba(26, 86, 168, 0.2);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent-primary);
}

.feature-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: var(--space-4xl) var(--space-xl);
    background: var(--bg-primary);
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.cta-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
}

.cta-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.deco-circle {
    position: absolute;
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    animation: expandCircle 4s ease-out infinite;
}

.deco-circle:nth-child(1) {
    width: 200px;
    height: 200px;
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.deco-circle:nth-child(2) {
    width: 300px;
    height: 300px;
    top: -150px;
    left: -150px;
    animation-delay: 0.5s;
}

.deco-circle:nth-child(3) {
    width: 400px;
    height: 400px;
    top: -200px;
    left: -200px;
    animation-delay: 1s;
}

@keyframes expandCircle {
    0% { transform: scale(0.8); opacity: 0.3; }
    100% { transform: scale(1.2); opacity: 0; }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-2xl) var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
}

.footer-brand img {
    height: 36px;
    width: auto;
    border-radius: 6px;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-copy {
    width: 100%;
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-lg);
}

.footer-copy p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .hero-visual {
        order: -1;
    }
    
    .visual-container {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: var(--space-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: calc(70px + var(--space-2xl)) var(--space-md) var(--space-2xl);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .floating-card {
        display: none;
    }
    
    .features-preview {
        padding: var(--space-3xl) var(--space-md);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-section {
        padding: var(--space-3xl) var(--space-md);
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}