:root {
    --bg: #f2f2f7;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text: #111;
    --muted: #666;
    --accent: #007aff;
}

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

header {
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.6);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    box-shadow: 0 1px 10px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

header h1 {
    font-weight: 600;
    margin: 0;
    font-size: 1.4rem;
}

nav a {
    color: var(--text);
    font-weight: 500;
    margin-left: 1rem;
    text-decoration: none;
}

.container {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    padding: 1.5rem;
    flex-wrap: wrap;
}

.sidebar {
    flex: 0 0 220px;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid rgba(200,200,200,0.2);
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.card h2 {
    font-size: 1.2rem;
    margin-top: 0;
}

.meta {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--muted);
    margin-top: 3rem;
}

input, select {
    padding: 0.5rem;
    width: 100%;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

:root[data-theme='dark'] {
    --bg: #1e1e1f;
    --card-bg: rgba(40, 40, 45, 0.9);
    --text: #f2f2f2;
    --muted: #999;
    --accent: #0af;
}