/* ===== Modern SaaS Design - Minimalist ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors - Red Theme */
    --primary: #ef4444;
    --primary-dark: #dc2626;
    --primary-light: #f87171;
    
    /* Accent Colors */
    --accent: #f97316;
    --accent-light: #fb923c;
    
    /* Neutral Colors - Dark Theme */
    --white: #ffffff;
    --gray-50: #0a0a0a;
    --gray-100: #171717;
    --gray-200: #262626;
    --gray-300: #404040;
    --gray-400: #525252;
    --gray-500: #737373;
    --gray-600: #a3a3a3;
    --gray-700: #d4d4d4;
    --gray-800: #e5e5e5;
    --gray-900: #fafafa;
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.nav-brand i {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-menu a {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s ease;
    position: relative;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    transition: all 0.3s ease;
    border-radius: var(--radius-full);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--gray-100) 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(239, 68, 68, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(249, 115, 22, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-2xl) 0;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    box-shadow: var(--shadow-sm);
}

.badge i {
    color: var(--primary);
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-200);
    border-color: var(--gray-400);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    cursor: pointer;
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: var(--gray-400);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-8px); }
    60% { transform: translateX(-50%) translateY(-4px); }
}

/* ===== Section Styles ===== */
section {
    padding: clamp(3rem, 8vw, 6rem) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== Features Section ===== */
.features {
    background: var(--gray-100);
}

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

.feature-card {
    background: var(--gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.feature-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
    font-weight: 600;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===== Modules Section ===== */
.modules {
    background: var(--gray-50);
}

.modules-container {
    display: grid;
    gap: var(--spacing-lg);
}

.module-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
    background: var(--gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.module-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.module-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.3;
}

.module-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
}

.module-content h3 i {
    color: var(--primary);
    font-size: 1.125rem;
}

.module-content p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.module-content ul {
    list-style: none;
    padding-left: 0;
}

.module-content ul li {
    color: var(--gray-600);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 0.9375rem;
}

.module-content ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ===== Technology Section ===== */
.technology {
    background: var(--gray-100);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.tech-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

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

.tech-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.tech-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
    font-weight: 600;
}

.tech-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.tech-features {
    display: grid;
    gap: var(--spacing-md);
}

.tech-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.tech-feature i {
    font-size: 1.25rem;
    color: var(--success);
    flex-shrink: 0;
    margin-top: 2px;
}

.tech-feature h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
    font-weight: 600;
}

.tech-feature p {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ===== Configuration Section ===== */
.configuration {
    background: var(--gray-50);
}

.config-tabs {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-200);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--gray-600);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.tab-btn:hover {
    color: var(--gray-900);
    background: var(--gray-100);
}

.tab-btn.active {
    color: var(--primary);
    background: var(--gray-100);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.tab-content {
    padding: var(--spacing-xl);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.config-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}

.config-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius);
    color: var(--gray-700);
    font-size: 0.9375rem;
    transition: all 0.2s ease;
}

.config-list li:hover {
    background: var(--gray-200);
}

.config-list li i {
    color: var(--primary);
    font-size: 1.125rem;
}

/* ===== Security Section ===== */
.security {
    background: var(--gray-100);
}

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

.security-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

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

.security-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.security-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.security-item h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
    font-weight: 600;
}

.security-item p {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===== CTA Section ===== */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
    padding: clamp(3rem, 8vw, 5rem) 0;
}

.cta h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--white);
    letter-spacing: -0.02em;
}

.cta p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: var(--gray-50);
    color: var(--gray-900);
}

.cta .btn-primary:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.cta .btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-100);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    color: var(--gray-600);
    border-top: 1px solid var(--gray-200);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
}

.footer-section h3 i {
    color: var(--primary);
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    font-weight: 600;
}

.footer-section p {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    padding: var(--spacing-xs) 0;
}

.footer-section ul li a {
    color: var(--gray-600);
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 0.9375rem;
}

.footer-section ul li a:hover {
    color: var(--primary);
}

.footer-section ul li i {
    color: var(--primary);
    margin-right: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: -100%;
        flex-direction: column;
        background: var(--gray-50);
        width: 100%;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
        align-items: flex-start;
    }

    .nav-menu.active {
        left: 0;
    }

    .module-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .tab-buttons {
        flex-direction: column;
    }

    .config-list {
        grid-template-columns: 1fr;
    }
}

/* ===== Utility Classes ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}