/* ========================================
   SociMata - Modern Product Landing Page
   Color Scheme: Red (#E63946) + Blue (#457B9D)
======================================== */

/* CSS Variables for Brand Colors */
:root {
    --color-red: #E63946;
    --color-blue: #457B9D;
    --color-dark: #1D3557;
    --color-light: #F1FAEE;
    --color-white: #FFFFFF;
    --color-black: #0A0A0A;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-red) 0%, var(--color-blue) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(230, 57, 70, 0.9) 0%, rgba(69, 123, 157, 0.9) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-light);
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Full-width sections */
.value-section,
.demo-section {
    width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-dark);
    opacity: 0.8;
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.animate-fade-in {
    animation: fadeIn 1s ease-out forwards;
}

.animate-slide-up {
    animation: slideUp 0.8s ease-out forwards;
}

.animate-bounce {
    animation: bounce 2s infinite;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.fade-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-fast), backdrop-filter var(--transition-fast);
}

.navbar.scrolled {
    background: rgba(29, 53, 87, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    height: 50px;
    width: auto;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 5px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 80px;
}

.hero-content {
    text-align: center;
    z-index: 2;
    padding: var(--spacing-md);
}

.hero-logo {
    width: clamp(150px, 30vw, 300px);
    height: auto;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 2rem);
    color: var(--color-light);
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.hero-slogan {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.highlight-red {
    color: #FF6B6B;
    font-weight: 700;
}

.highlight-blue {
    color: #4ECDC4;
    font-weight: 700;
}

.highlight-brand {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--color-white);
    color: var(--color-red);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    animation: float 20s infinite linear;
    opacity: 0.3;
}

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

/* Value Section */
.value-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: var(--spacing-lg);
    width: 100%;
}

/* Force 4 columns on large screens and maximize width */
@media (min-width: 1200px) {
    .value-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: var(--spacing-md);
        max-width: 95vw;
        margin: 0 auto;
    }
}

.value-card {
    background: var(--color-light);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    border-left: 4px solid transparent;
}

.value-card:nth-child(odd) {
    border-left-color: var(--color-red);
}

.value-card:nth-child(even) {
    border-left-color: var(--color-blue);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

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

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.value-card p {
    color: var(--color-dark);
    opacity: 0.8;
    line-height: 1.8;
}

/* Scenarios Section */
.scenarios-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-light) 0%, rgba(230, 57, 70, 0.05) 100%);
}

.scenario-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: var(--color-white);
    border: 2px solid var(--color-blue);
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-dark);
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.tab-btn:hover {
    background: rgba(69, 123, 157, 0.1);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
}

.scenario-content {
    position: relative;
}

.scenario-panel {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.scenario-panel.active {
    display: block;
}

.scenario-detail {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.detail-item {
    margin-bottom: var(--spacing-md);
}

.detail-item:last-child {
    margin-bottom: 0;
}

.detail-item strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-blue);
}

.detail-item ul {
    margin-left: var(--spacing-md);
    margin-top: var(--spacing-xs);
}

.detail-item li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

/* Demo Section */
.demo-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
}

.demo-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.demo-intro h3 {
    font-size: 1.5rem;
    color: var(--color-dark);
}

.video-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 95vw;
    margin: 0 auto;
    width: 100%;
}

.video-card {
    background: var(--color-light);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--color-dark);
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-info {
    padding: var(--spacing-md);
}

.video-info h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.demo-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.demo-table th,
.demo-table td {
    padding: var(--spacing-xs);
    text-align: left;
    vertical-align: top;
}

.demo-table th {
    color: var(--color-blue);
    font-weight: 600;
    width: 80px;
}

.demo-table em {
    color: var(--color-dark);
    opacity: 0.7;
    font-size: 0.85rem;
}

/* About Section */
.about-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, rgba(69, 123, 157, 0.05) 0%, var(--color-light) 100%);
}

.about-content {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.company-intro {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--color-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.feature-box {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-light);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.feature-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

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

.feature-box h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.feature-box p {
    color: var(--color-dark);
    opacity: 0.8;
    line-height: 1.6;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: var(--gradient-hero);
    color: var(--color-white);
}

.contact-section .section-title {
    color: var(--color-white);
    -webkit-text-fill-color: var(--color-white);
}

.contact-section .section-subtitle {
    color: var(--color-light);
}

.contact-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.contact-info {
    margin-bottom: var(--spacing-lg);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.info-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.info-item .icon {
    font-size: 2rem;
}

.info-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-light);
}

.info-item p {
    color: var(--color-light);
    opacity: 0.9;
}

.info-item a {
    color: var(--color-light);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.info-item a:hover {
    color: var(--color-white);
}

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

.tagline {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--color-dark);
    padding: var(--spacing-lg) 0;
    color: var(--color-light);
}

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

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-md);
}

.footer p {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(29, 53, 87, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-lg);
        transition: right var(--transition-fast);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.5rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .hero-section {
        padding-top: 100px;
    }
    
    .value-grid,
    .video-showcase,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .scenario-tabs {
        flex-direction: row;
        overflow-x: auto;
        white-space: nowrap;
        justify-content: flex-start;
        padding-bottom: var(--spacing-sm);
    }
    
    .tab-btn {
        flex-shrink: 0;
    }
    
    .video-wrapper {
        aspect-ratio: 9 / 16;
        max-height: 500px;
    }
    
    .contact-content,
    .about-content {
        padding: var(--spacing-md);
    }
    
    .info-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .value-grid,
    .video-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    html {
        zoom: 1;
    }
    
    body {
        font-size: 1rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .cta-button,
    .hero-bg-animation {
        display: none;
    }
    
    .hero-section {
        min-height: auto;
        padding: 2cm;
    }
    
    body {
        background: white;
        color: black;
    }
}