:root {
    --primary-blue: #007bff;
    --electric-blue: #00d4ff;
    --dark-bg: #0b0e14;
    --dark-surface: #161b22;
    --dark-card: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-gradient: linear-gradient(135deg, #007bff 0%, #00d4ff 100%);
    --nav-height: 80px;
    --transition-speed: 0.3s;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding-top: var(--nav-height);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

.bg-dark-surface { background-color: var(--dark-surface); }
.bg-dark-card { background-color: var(--dark-card); }

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

.btn-primary-custom {
    background: var(--accent-gradient);
    border: none;
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 212, 255, 0.3);
    color: white;
}

.btn-outline-custom {
    background: transparent;
    border: 2px solid var(--electric-blue);
    color: var(--electric-blue);
    padding: 10px 28px;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-speed);
}

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

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Navbar */
.navbar-custom {
    background: rgba(11, 14, 20, 0.8);
    backdrop-filter: blur(10px);
    height: var(--nav-height);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-speed);
}

.navbar-brand-custom {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary) !important;
}

.nav-link-custom {
    color: var(--text-secondary) !important;
    font-weight: 500;
    margin: 0 15px;
    transition: color var(--transition-speed);
}

.nav-link-custom:hover, .nav-link-custom.active {
    color: var(--electric-blue) !important;
}

/* Sections */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* Cards */
.service-card {
    background: var(--dark-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 40px;
    height: 100%;
    transition: all var(--transition-speed);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--electric-blue);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--electric-blue);
    margin-bottom: 20px;
}

/* Hero */
.hero-section {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-blob {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, rgba(0, 123, 255, 0) 70%);
    filter: blur(50px);
    z-index: -1;
}

.blob-1 { top: -100px; right: -100px; }
.blob-2 { bottom: -100px; left: -100px; }

/* Contact Form */
.form-control-custom {
    background: var(--dark-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 8px;
}

.form-control-custom:focus {
    background: var(--dark-surface);
    border-color: var(--electric-blue);
    color: var(--text-primary);
    box-shadow: none;
}

/* Footer */
footer {
    background: #05070a;
    padding: 80px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive fixes */
@media (max-width: 991px) {
    .navbar-collapse {
        background: var(--dark-surface);
        padding: 20px;
        border-radius: 12px;
        margin-top: 15px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.6);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-link-custom {
        padding: 12px 0;
        margin: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-link-custom:last-child {
        border-bottom: none;
    }

    section {
        padding: 60px 0;
    }

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

@media (max-width: 576px) {
    :root {
        --nav-height: 70px;
    }

    .display-3 {
        font-size: 2.25rem;
    }

    .lead {
        font-size: 1rem;
    }

    .btn-primary-custom, .btn-outline-custom {
        width: 100%;
        text-align: center;
    }

    .service-card {
        padding: 30px 20px;
    }
}

/* Touch device improvements */
@media (hover: none) {
    .service-card:hover {
        transform: none;
    }
    
    .btn-primary-custom:active {
        transform: scale(0.98);
    }
}