:root {
    --primary-deep: #0A1628;
    --secondary-deep: #1E3A5F;
    --accent-cyan: #00D4FF;
    --accent-teal: #20B2AA;
    --neutral-light: #F8FAFB;
    --neutral-gray: #A0AEC0;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--primary-deep);
    color: var(--neutral-light);
    overflow-x: hidden;
}

/* Canvas Background */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.3;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.nav-blur {
    backdrop-filter: blur(20px);
    background: rgba(10, 22, 40, 0.9);
}

/* Scroll Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
}

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

/* Service Cards */
.service-card {
    background: linear-gradient(135deg, var(--secondary-deep), rgba(30, 58, 95, 0.8));
    border: 1px solid rgba(0, 212, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 212, 255, 0.2);
}

.service-card.expanded {
    border-color: var(--accent-cyan);
    box-shadow: 0 25px 50px rgba(0, 212, 255, 0.3);
}

/* Service Details */
.service-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.service-details.expanded {
    max-height: 1000px;
}

/* Filter Buttons */
.filter-btn {
    transition: all 0.3s ease;
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-teal));
    color: white;
}

/* Mobile Menu */
.mobile-menu {
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.mobile-menu.open {
    transform: translateX(0);
}