/* =========================================================================
   VARIABLES & BASE STYLES
   ========================================================================= */
:root {
    --bg-color: #050505;
    --surface-color: #121212;
    --surface-color-light: #1e1e1e;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --accent-color: #3b82f6;
    /* Premium Blue */
    --accent-hover: #2563eb;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --border-radius: 8px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

*,
*::before,
*::after {
    box-sizing: inherit;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    font-weight: 700;
    line-height: 1.2;
}

p {
    margin: 0 0 var(--spacing-md);
    color: var(--text-secondary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

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

/* =========================================================================
   TYPOGRAPHY
   ========================================================================= */
.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    background: var(--text-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-inline: auto;
}

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

/* =========================================================================
   LAYOUT UTILITIES
   ========================================================================= */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* =========================================================================
   COMPONENTS
   ========================================================================= */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--surface-color-light);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #2a2a2a;
}

.btn-primary-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--surface-color-light);
}

.btn-primary-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: padding var(--transition-fast);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.logo-img {
    height: 32px;
    width: auto;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links a:not(.btn) {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-links a:not(.btn):hover {
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

/* Background Glow Effect */
.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 60%);
    z-index: 0;
}

.hero-content {
    text-align: center;
    width: 100%;
    max-width: 800px;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 4rem;
    /* offset for navbar */
}

.hero h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(180deg, #fff 0%, #a3a3a3 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.hero p {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

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

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

.service-card {
    background: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.3);
}

.service-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    padding: 1rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* About Section */
.about {
    background: var(--surface-color);
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-features {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.about-features li {
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    background: var(--bg-color);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Contact Section */
.contact {
    position: relative;
    overflow: hidden;
}

.contact::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    z-index: -1;
}

.contact-cta {
    margin-top: 2rem;
}

/* Footer */
.footer {
    background: var(--surface-color);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 3rem var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    height: 24px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

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

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

/* =========================================================================
   ANIMATIONS & EFFECTS
   ========================================================================= */

/* Initial states for IntersecionObserver */
.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in {
    opacity: 0;
    transition: opacity 1s ease-out;
}

.fade-in.visible {
    opacity: 1;
}

/* Delays for staggered animations */
.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

/* Home Hero initial animation directly applied via script */


/* =========================================================================
   RESPONSIVE DESIGN (MOBILE FIRST CONSIDERATIONS)
   ========================================================================= */

/* Mobile Menu Toggle (Hidden on Desktop) */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .section-container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .nav-links {
        display: none;
        /* Hidden on mobile by default */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--surface-color);
        flex-direction: column;
        padding: 2rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-actions {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .footer-brand {
        align-items: center;
    }
}