:root {
    --bg-color: #000000;
    --box-bg: #0a0f1d;
    --text-color: #cbd5e1;
    --text-bright: #ffffff;
    --primary-purple: #a855f7;
    --accent-blue: #1d4ed8;
    --border-color: #1e293b;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(-45deg, #a855f7, #1d4ed8, #000000, #0a0f1d);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 20px;
    background: rgba(10, 15, 29, 0.5);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

nav a:hover, nav a.active {
    color: var(--primary-purple);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 60px 20px 40px 20px;
    color: var(--text-bright);
    animation: fadeInUp 0.8s ease-out forwards;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    background: linear-gradient(to right, #3b82f6, var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-top: 10px;
}

.main-container {
    display: grid;
    grid-template-columns: repeat(3, 3fr);
    gap: 20px;
}

section {
    margin: 0;
    background: var(--box-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(29, 78, 216, 0.1);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

section:nth-child(1) { animation-delay: 0.2s; }
section:nth-child(2) { animation-delay: 0.4s; }
section:nth-child(3) { animation-delay: 0.6s; }

section:hover {
    transform: translateY(-5px);
    border-color: var(--primary-purple);
    box-shadow: 0 10px 25px rgba(168, 85, 247, 0.2);
}

h2 {
    margin-top: 0;
    color: var(--text-bright);
    border-bottom: 2px solid var(--accent-blue);
    padding-bottom: 8px;
    display: inline-block;
    transition: border-color 0.3s ease;
}

section:hover h2 {
    border-color: var(--primary-purple);
}

.project-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.project-card {
    padding: 15px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.project-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
}

.project-card h3 {
    margin-top: 0;
    color: var(--primary-purple);
}

@media (max-width: 900px) {
    .main-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .main-container {
        grid-template-columns: 1fr;
    }
}

#theme-toggle {
    background: transparent;
    color: var(--primary-purple);
    border: 1px solid var(--primary-purple);
    padding: 5px 15px;
    cursor: pointer;
    font-family: inherit;
    font-weight: bold;
    border-radius: 4px;
    transition: all 0.3s ease;
}
#theme-toggle:hover {
    background: var(--primary-purple);
    color: var(--text-bright);
    box-shadow: 0 0 10px var(--primary-purple);
}