:root {
    --light-bg: #ECEFF4;
    --light-fg: #2E3440;
    --light-card: #E5E9F0;
    --light-border: #D8DEE9;
    --light-link: #5E81AC;
    --light-link-hover: #81A1C1;

    --dark-bg: #2E3440;
    --dark-fg: #ECEFF4;
    --dark-card: #3B4252;
    --dark-border: #4C566A;
    --dark-link: #88C0D0;
    --dark-link-hover: #8FBCBB;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

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

.dark-theme {
    background-color: var(--dark-bg);
    color: var(--dark-fg);
}

header {
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid;
    transition: background-color 0.3s, border-color 0.3s;
}

.light-theme header {
    background-color: var(--light-card);
    border-color: var(--light-border);
}

.dark-theme header {
    background-color: var(--dark-card);
    border-color: var(--dark-border);
}

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

header p {
    margin: 0.5rem 0 0;
}

.theme-switcher-container {
    display: flex;
    justify-content: flex-end;
}

#theme-switcher {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 9999px;
    transition: background-color 0.3s;
}

.light-theme #theme-switcher {
    color: var(--light-fg);
}

.dark-theme #theme-switcher {
    color: var(--dark-fg);
}

#theme-switcher:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.icon {
    width: 1.5rem;
    height: 1.5rem;
}

.hidden {
    display: none;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s;
}

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

.dark-theme .card {
    background-color: var(--dark-card);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.card h2 {
    margin: 0 0 1rem;
    font-size: 1.5rem;
}

.card p {
    margin: 0 0 1.5rem;
    flex-grow: 1;
}

.card a {
    text-decoration: none;
    font-weight: bold;
    transition: color 0.2s;
}

.light-theme .card a {
    color: var(--light-link);
}

.dark-theme .card a {
    color: var(--dark-link);
}

.card a:hover {
    color: var(--light-link-hover);
}

.dark-theme .card a:hover {
    color: var(--dark-link-hover);
}

footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid;
    margin-top: 2rem;
    transition: background-color 0.3s, border-color 0.3s;
}

.light-theme footer {
    background-color: var(--light-card);
    border-color: var(--light-border);
}

.dark-theme footer {
    background-color: var(--dark-card);
    border-color: var(--dark-border);
}

footer p {
    margin: 0;
}

footer a {
    text-decoration: none;
    transition: color 0.2s;
}

.light-theme footer a {
    color: var(--light-link);
}

.dark-theme footer a {
    color: var(--dark-link);
}

footer a:hover {
    text-decoration: underline;
}