:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --text-color: #334155;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --border-color: #cbd5e1;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

header {
    background: linear-gradient(135deg, #0f172a, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
    padding: 3.5rem 1rem 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

header h1 {
    margin: 0;
    font-size: 2.8rem;
    letter-spacing: -0.025em;
    font-weight: 800;
}

header p {
    margin: 0.5rem 0 1.5rem;
    font-size: 1.25rem;
    opacity: 0.9;
    font-weight: 300;
}

.top-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.25rem;
    border-radius: 30px;
    max-width: 850px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.top-nav a {
    color: white;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.top-nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.container {
    max-width: 900px;
    margin: -1.5rem auto 3rem;
    padding: 0 1.5rem;
}

section {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    margin-bottom: 2rem;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
}

/* Cool hover effect: gradient sheen and lift */
section:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px -5px rgba(59, 130, 246, 0.15), 0 8px 10px -6px rgba(59, 130, 246, 0.1);
    border-color: var(--secondary-color);
    background: linear-gradient(to bottom right, #ffffff, #f8fafc);
}

section h2 {
    color: var(--primary-color);
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 0.6rem;
    margin-top: 0;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

section h2 i {
    color: var(--secondary-color);
    font-size: 1.3rem;
}

.experience-item {
    margin-bottom: 1.75rem;
}

.experience-item:last-child {
    margin-bottom: 0;
}

.experience-item h3 {
    color: var(--secondary-color);
    font-size: 1.15rem;
    margin-bottom: 0.3rem;
    font-weight: 600;
}

ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
}

footer {
    text-align: center;
    padding: 2.5rem;
    color: #64748b;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    background: #ffffff;
    margin-top: 4rem;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    section {
        padding: 1.5rem;
    }
    .top-nav {
        gap: 0.3rem;
        padding: 0.5rem;
    }
    .top-nav a {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }
}