:root {
    --color-bg: #f5f5f7;
    --color-text: #1d1d1f;
    --color-accent: #0071e3;
    --color-card-bg: rgba(255, 255, 255, 0.6);
    --color-border: rgba(0, 0, 0, 0.1);
    --color-shadow: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #161617;
        --color-text: #f5f5f7;
        --color-accent: #007aff;
        --color-card-bg: rgba(28, 28, 30, 0.6);
        --color-border: rgba(255, 255, 255, 0.1);
        --color-shadow: rgba(255, 255, 255, 0.05);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
    transition: background-color 0.5s ease;
}

.webgl {
    position: fixed;
    top: 0;
    left: 0;
    outline: none;
    z-index: -1;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--color-card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.2rem 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 600;
}

.tagline {
    font-size: 1.1rem;
    font-weight: 400;
    margin: 0.5rem 0 1.5rem;
    opacity: 0.8;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    display: inline-block;
    margin: 0 20px;
}

nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--color-accent);
}

/* Sections */
.section {
    padding: 100px 0;
    text-align: center;
    position: relative;
}

.bg-light {
    background-color: var(--color-bg);
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 20px;
}

/* Glassmorphism Cards */
.service-item, .portfolio-item {
    background-color: var(--color-card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--color-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-grid, .portfolio-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.service-item {
    flex: 1 1 280px;
}

.portfolio-item {
    flex: 1 1 280px;
}

.service-item:hover, .portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px var(--color-shadow);
}

.portfolio-item img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.portfolio-item h3 {
    padding: 15px 0 0;
    margin: 0;
    font-weight: 500;
}

.portfolio-item p {
    padding: 0 0 15px;
    margin: 0;
    font-size: 0.9rem;
}

/* Contact Button */
.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: #fff;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0056b3;
}

/* Footer */
footer {
    background-color: var(--color-text);
    color: var(--color-bg);
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}