/* ==========================================================================
   CSS Variables & Tokens
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-dark: #070B14;
    --bg-darker: #04060B;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    
    /* Accents */
    --accent-blue: #00f2fe;
    --accent-purple: #4facfe;
    --accent-gradient: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-hover: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;

    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

/* Typography Utilities */
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   UI Components
   ========================================================================== */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: var(--transition-smooth);
    border: none;
    font-family: var(--font-sans);
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-dark);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.btn-outline:hover {
    background: var(--accent-blue);
    color: var(--bg-dark);
}

.w-100 {
    width: 100%;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-smooth);
    padding: 1.5rem 0;
}

.navbar.scrolled {
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-primary);
}

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

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

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

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

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-smooth);
}

.nav-links a:not(.btn):hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 30px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../assets/images/hero_bg.png');
    background-size: cover;
    background-position: center;
    z-index: -2;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(7, 11, 20, 0.4) 0%, rgba(7, 11, 20, 0.95) 100%);
    z-index: -1;
}

.hero-content {
    display: flex;
    justify-content: flex-start;
}

.hero-text {
    max-width: 650px;
    padding: 3rem;
    animation: fadeUp 1s ease-out;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(0, 242, 254, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

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

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

/* ==========================================================================
   Services Section
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    padding: 2.5rem 2rem;
    transition: var(--transition-smooth);
}

.service-card.interactive:hover {
    transform: translateY(-10px);
    background: var(--glass-hover);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 242, 254, 0.1);
}

.icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.feature-list li {
    font-size: 0.875rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-list li::before {
    content: '→';
    color: var(--accent-blue);
}

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

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

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-item {
    padding: 1.5rem;
    text-align: center;
}

.stat-item h4 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.stat-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.about-image {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.tech-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 242, 254, 0.2);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.tech-circle:nth-child(1) { width: 200px; height: 200px; animation: pulse 4s infinite; }
.tech-circle:nth-child(2) { width: 300px; height: 300px; animation: pulse 4s infinite 1s; }
.tech-circle:nth-child(3) { width: 400px; height: 400px; animation: pulse 4s infinite 2s; border-style: dashed; }

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.2; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
}

.code-snippet {
    position: relative;
    z-index: 10;
    background: rgba(0, 0, 0, 0.6);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-family: monospace;
    font-size: 0.9rem;
    color: #a0aec0;
}

.code-snippet span.keyword { color: #c678dd; }
.code-snippet span.string { color: #98c379; }
.code-snippet span.property { color: #e5c07b; }

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-card {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    overflow: hidden;
}

.contact-info {
    padding: 4rem;
    background: rgba(0, 242, 254, 0.03);
    border-right: 1px solid var(--glass-border);
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}

.detail-item svg {
    color: var(--accent-blue);
}

.contact-form {
    padding: 4rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem 1rem 1rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-group select {
    appearance: none;
    color: var(--text-secondary);
}
.form-group select option {
    background: var(--bg-dark);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(0, 242, 254, 0.05);
}

/* Floating Label implementation */
.form-group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-secondary);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label,
.form-group input:focus + label,
.form-group textarea:focus + label {
    top: -0.5rem;
    left: 0.8rem;
    font-size: 0.75rem;
    background: var(--bg-dark);
    padding: 0 0.4rem;
    color: var(--accent-blue);
    border-radius: 4px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    background: var(--bg-darker);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.footer-brand span {
    color: var(--accent-blue);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .about-grid, .contact-card {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero-text {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .contact-info, .contact-form {
        padding: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
}