/* Palantir-Inspired Design System */
:root {
    /* Palantir Color Palette */
    --primary-dark: #0A0B0D;
    --secondary-dark: #1A1B1E;
    --tertiary-dark: #2A2B2F;
    --surface-dark: #1E1F23;
    --accent-blue: #0084FF;
    --accent-cyan: #00D4FF;
    --accent-purple: #6B73FF;
    --text-primary: #FFFFFF;
    --text-secondary: #B8BCC8;
    --text-muted: #6B7280;
    --border-subtle: #2D3748;
    --border-accent: #374151;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
}

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

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

body {
    font-family: var(--font-primary);
    background: var(--primary-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 11, 13, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-logo img {
    height: 28px;
    width: auto;
    max-width: 120px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue);
    transition: width 0.3s ease;
}

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

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

.auth-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

/* Login button removed */

.signup-btn {
    color: var(--text-primary);
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}

.signup-btn:hover {
    background: #0066CC;
    border-color: #0066CC;
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    background: radial-gradient(ellipse at center, rgba(0, 132, 255, 0.05) 0%, var(--primary-dark) 70%);
    overflow: hidden;
    padding: 120px 0 var(--space-xl);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23374151' fill-opacity='0.1'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    opacity: 0.3;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: #0066CC;
    border-color: #0066CC;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.tech-card {
    background: linear-gradient(135deg, var(--surface-dark) 0%, var(--tertiary-dark) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tech-card:hover::before {
    opacity: 0.1;
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-xl);
}

.tech-card i {
    font-size: 2rem;
    color: var(--accent-blue);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 2;
}

.tech-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

/* Section Styles */
.section {
    padding: var(--space-2xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-xl);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

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

/* Technology Section */
.technology {
    background: var(--secondary-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.feature {
    text-align: center;
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    background: var(--surface-dark);
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-primary);
}

.feature h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.feature p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Solutions Section */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.solution-card {
    background: var(--surface-dark);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.solution-card:hover::before {
    opacity: 0.05;
}

.solution-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-xl);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 2;
}

.solution-header i {
    font-size: 2rem;
    color: var(--accent-blue);
}

.solution-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.solution-features {
    list-style: none;
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 2;
}

.solution-features li {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    padding-left: var(--space-lg);
    position: relative;
}

.solution-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 600;
}

.solution-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.solution-btn:hover {
    color: var(--accent-cyan);
    transform: translateX(4px);
}

/* Stats Section */
.stats {
    background: var(--tertiary-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

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

.stat {
    text-align: center;
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    background: var(--surface-dark);
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.stat:hover::before {
    opacity: 0.1;
}

.stat:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-lg);
}

.stat h3 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 2;
    font-family: var(--font-mono);
}

.stat p {
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    position: relative;
    z-index: 2;
}

/* Footer */
.footer {
    background: var(--secondary-dark);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.footer-section h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

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

.footer-section ul li {
    margin-bottom: var(--space-sm);
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--primary-dark);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--space-2xl);
        transition: left 0.3s ease;
        z-index: 999;
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        border-top: 1px solid var(--border-subtle);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu .nav-link {
        font-size: 1.125rem;
        padding: var(--space-lg) 0;
        border-bottom: 1px solid var(--border-subtle);
        width: 90%;
        text-align: center;
    }
    
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container,
    .container-wide {
        padding: 0 var(--space-md);
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Animation Classes */
.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--accent-blue);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Tab Buttons */
.admin-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
}

.tab-btn {
    padding: var(--space-md) var(--space-xl);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background-color: var(--tertiary-dark);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    background-color: var(--surface-dark);
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--accent-blue);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}