/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #111111;
    background-color: #ffffff;
    line-height: 1.6;
    scroll-behavior: smooth;
}
a {
    text-shadow: none;
    color: inherit;
    text-decoration: none;
}

/* Header & Nav */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 10%;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 100;
}
.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}
nav a {
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.2s ease;
}
nav a:hover {
    color: #666666;
}

/* Hero Section */
.hero {
    padding: 8rem 10%;
    max-width: 800px;
}
.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}
.hero p {
    font-size: 1.25rem;
    color: #666666;
    margin-bottom: 2rem;
}

/* Global Buttons */
.btn {
    display: inline-block;
    background: #111111;
    color: #ffffff;
    padding: 0.8rem 1.8rem;
    border-radius: 4px;
    font-weight: 500;
    transition: background 0.2s ease;
}
.btn:hover {
    background: #333333;
}

/* Section Layouts */
.section {
    padding: 6rem 10%;
}
.alt-bg {
    background-color: #f9f9f9;
}
.section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    letter-spacing: -0.5px;
}

/* Project Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}
.project-card {
    display: flex;
    flex-direction: column;
}
.project-image-placeholder {
    width: 100%;
    height: 200px;
    background: #eaeaea;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888888;
    font-weight: 500;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}
.project-card p {
    color: #666666;
    font-size: 0.95rem;
}

/* About Layout */
.about-container {
    max-width: 700px;
}
.about-container p {
    font-size: 1.15rem;
    color: #333333;
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 10%;
    font-size: 0.85rem;
    color: #999999;
    border-top: 1px solid #eee;
}

/* Mobile Responsive adjustment */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    header { padding: 1.5rem 5%; }
    .section { padding: 4rem 5%; }
}