/* OpenAI-inspired Clean Modern Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --background: #0d1117;
    --card-bg: #161b22;
    --navbar-bg: rgba(13, 17, 23, 0.95);
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent: #10a37f;
    --accent-hover: #0d8c6c;
    --border: #30363d;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Clean Background - Remove animations */
.background-animation {
    display: none;
}

/* Modern Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    position: relative;
    height: 72px; /* Increased height to accommodate larger logo */
}

/* Remove navbar SVG background */
.navbar-bg {
    display: none;
}

/* Clean Logo */
.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo img {
    height: 40px; /* Increased logo size */
    width: auto;
}

/* Clean Navigation */
.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    border-radius: 0;
}

.nav-links li {
    position: relative;
}

.nav-links a, .dropbtn {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    border-radius: 6px;
    transition: color 0.2s ease;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-links a:hover, .dropbtn:hover {
    color: var(--text-primary);
    background: none;
    box-shadow: none;
}

/* Clean Dropdown */
.dropdown-content {
    display: none;
    position: absolute;
    background: var(--card-bg);
    min-width: 200px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    z-index: 1001;
    border-radius: 8px;
    top: 100%;
    left: 0;
    border: 1px solid var(--border);
    overflow: hidden;
    margin-top: 4px;
}

.dropdown-content a {
    color: var(--text-secondary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    background: none;
    border-radius: 0;
    font-size: 0.9rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.dropdown-content a:hover {
    background: rgba(16, 163, 127, 0.1);
    color: var(--accent);
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content,
.dropdown-content:hover {
    display: block;
}

/* Add invisible bridge to prevent gap issues */
.dropdown:before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 8px;
    z-index: 1000;
}

.dropbtn::after {
    content: ' ↓';
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-left: 0.3em;
}

/* Clean Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    cursor: pointer;
    z-index: 1100;
    background: none;
    border: none;
    outline: none;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    margin: 3px 0;
    background: var(--text-primary);
    border-radius: 1px;
    transition: 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
main {
    margin-top: 72px; /* Adjusted margin to match new header height */
}

.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    background: var(--background);
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.5;
}

/* Clean Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--card-bg);
    border-color: var(--accent);
}

/* Clean Sections */
.services, .tech-stack, .product-section, .contact {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    background: none;
    border-radius: 0;
    box-shadow: none;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* Clean Cards */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.service-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--accent);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

/* Tech Stack Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.tech-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.tech-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

/* Contact Form */
.contact-form {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.form-group {
    display: grid;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.1);
}

/* Footer */
footer {
    padding: 3rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--background);
    margin-top: 5rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: color 0.2s ease;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-top: none;
        padding: 1rem;
        gap: 1rem;
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .services, .tech-stack, .product-section, .contact {
        padding: 3rem 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* Remove glitch and pulse animations */
.glitch {
    animation: none;
}

.pulse {
    animation: none;
}

/* Back to Top Button */
.back-to-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}