:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #10b981;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.navbar {
    background-color: var(--primary);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar h1 { margin: 0; font-size: 1.4rem; }
.navbar a { color: white; text-decoration: none; font-weight: bold; margin-left: 15px; }

.container {
    max-width: 1000px;
    margin: 20px auto;
    padding: 0 15px;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.progress-bar-bg {
    background-color: #e2e8f0;
    border-radius: 10px;
    height: 20px;
    width: 100%;
    overflow: hidden;
}

.progress-bar-fill {
    background-color: var(--secondary);
    height: 100%;
    width: 0%;
    transition: width 0.5s ease;
}

.kebiasaan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
}

.kebiasaan-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fafafa;
}

.kebiasaan-item.selesai {
    background: #ecfdf5;
    border-color: #a7f3d0;
}

.btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
}

.btn:hover { background-color: var(--primary-dark); }
.btn-disabled { background-color: #cbd5e1; cursor: not-allowed; }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

table, th, td { border: 1px solid var(--border-color); }
th, td { padding: 10px; text-align: left; }
th { background-color: #f1f5f9; }