:root { --primary: #2c3e50; --success: #27ae60; --danger: #e74c3c; --bg: #f4f7f6; }
body { margin: 0; font-family: sans-serif; background: var(--bg); color: #333; }
.container { padding: 15px; max-width: 500px; margin: auto; }
.app-header { background: var(--primary); color: white; padding: 15px 0; border-radius: 0 0 20px 20px; }
.header-flex { display: flex; align-items: center; gap: 15px; }
.app-logo { width: 50px; height: 50px; background: white; border-radius: 10px; }
.nav-tabs { display: flex; background: white; sticky; top: 0; z-index: 10; }
.nav-tabs button { flex: 1; padding: 15px; border: none; background: none; font-weight: bold; color: #999; border-bottom: 3px solid transparent; }
.nav-tabs button.active { color: var(--primary); border-bottom-color: var(--primary); }
.card { background: white; padding: 15px; border-radius: 15px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.mt-15 { margin-top: 15px; }
.form-group { margin-bottom: 12px; }
.input-group { display: flex; gap: 8px; }
input, select { flex: 1; padding: 12px; border: 1px solid #ddd; border-radius: 10px; font-size: 1rem; }
.btn-primary { width: 100%; background: var(--primary); color: white; border: none; padding: 15px; border-radius: 10px; }
.btn-success { background: var(--success); color: white; border: none; padding: 15px; border-radius: 10px; font-weight: bold; }
.btn-add { background: var(--primary); color: white; width: 45px; border-radius: 10px; border: none; font-size: 1.5rem; }
.cart-item { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid #eee; }
.total-box { display: flex; justify-content: space-between; font-size: 1.2rem; font-weight: bold; margin: 15px 0; }
.stats-container { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 15px; }
.stat-card { background: var(--primary); color: white; padding: 15px; border-radius: 15px; text-align: center; }
.btn-del { color: var(--danger); background: none; border: none; font-weight: bold; font-size: 1.2rem; cursor: pointer; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid #eee; }