/* ==========================================================================
   Design Tokens & CSS Variables
   ========================================================================== */
:root {
    /* Color Palette */
    --color-bg-base: #080c14;
    --color-bg-surface: #0f172a;
    --color-primary: #8b5cf6; /* Violet */
    --color-secondary: #06b6d4; /* Teal */
    --color-text-primary: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-glass-bg: rgba(15, 23, 42, 0.65);
    
    /* Gradients */
    --grad-primary: linear-gradient(135deg, #a855f7 0%, #06b6d4 100%);
    --grad-primary-hover: linear-gradient(135deg, #c084fc 0%, #22d3ee 100%);
    --grad-card-border: linear-gradient(135deg, rgba(168, 85, 247, 0.3) 0%, rgba(6, 182, 212, 0.1) 100%);

    /* Typography */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Layout & Spacing */
    --container-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-base);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ==========================================================================
   Utility Layout Containers
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
    position: relative;
}

.text-center { text-align: center; }
.text-gradient {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.25);
}

.btn-primary:hover {
    background: var(--grad-primary-hover);
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-block {
    display: width;
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.glass-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    background-color: var(--color-glass-bg);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

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

.nav-cta {
    padding: 0.5rem 1.25rem;
    border-radius: var(--border-radius-sm);
    background: var(--grad-primary);
    color: #fff;
    font-weight: 600;
}

.nav-cta:hover {
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
    transform: translateY(-1px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding-top: 12rem;
    padding-bottom: 10rem;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 100%);
    filter: blur(80px);
    pointer-events: none;
    z-index: 1;
}

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

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -2px;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 5rem auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* ==========================================================================
   Services Grid
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--grad-primary);
    opacity: 0;
    transition: var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.service-card-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.service-card-text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-section {
    background-color: rgba(255, 255, 255, 0.01);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-container {
    max-width: 800px;
    text-align: center;
}

.about-text {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* ==========================================================================
   Contact Section / Glassmorphic Card
   ========================================================================== */
.glass-card {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background-color: var(--color-glass-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 4rem;
    max-width: 650px;
    margin: 0 auto;
}

.contact-form {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 0.875rem 1rem;
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

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

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

/* ==========================================================================
   Responsive Design Media Queries
   ========================================================================== */
@media (max-width: 768px) {
    section {
        padding: 5rem 0;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .nav-menu {
        display: none; /* simple hidden mobile menu in placeholder state */
    }
    
    .glass-card {
        padding: 2rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}