:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --accent-color: #06b6d4;
    --accent-hover: #0891b2;
    --border-color: #334155;
    --success-color: #10b981;
}

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

.navbar {
    background-color: var(--card-bg);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.user-badge {
    background: var(--accent-color);
    color: #000;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: bold;
}

.container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

input, select {
    background: #090d16;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.6rem;
    border-radius: 4px;
    font-size: 1rem;
}

input[type="date"], input[type="month"] {
    cursor: pointer;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary { background: var(--accent-color); color: #000; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-success { background: var(--success-color); color: #fff; width: 100%; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th, .data-table td {
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    text-align: left;
}

.data-table th { background: #090d16; }

.total-box {
    margin-top: 1rem;
    font-size: 1.2rem;
    text-align: right;
}