:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.dark-mode {
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --text-color: #f9fafb;
    --text-light: #d1d5db;
    --bg-color: #111827;
    --bg-secondary: #1f2937;
    --border-color: #374151;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

#container--main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

#topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

#theme--toggle {
    text-align: right;
}

.themeBtn {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.themeBtn:hover {
    background-color: var(--primary-color);
    color: white;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

#project-pic {
    width: 100%;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
}

ul {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

#back--to-top {
    display: block;
    text-align: center;
    margin-top: 3rem;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    font-weight: 500;
}