```css
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #ffffff;
    color: #222;
    min-height: 100vh;
}

/* ================================
   LOGIN
================================ */

#login-screen {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px;
    background: #dff5e8;
}

.login-card {
    width: 100%;
    max-width: 360px;
    background: #ffffff;
    padding: 28px 22px;
    border-radius: 12px;
    border: 2px solid #b7e8c9;
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.login-card h1 {
    margin: 0 0 6px;
    color: #19a957;
    font-size: 27px;
    font-weight: 900;
}

.login-card p {
    color: #555;
    margin: 0 0 22px;
    font-size: 14px;
}

/* ================================
   INPUTS
================================ */

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 10px;
    border: 1px solid #b7e8c9;
    border-radius: 7px;
    font-size: 15px;
    background: #ffffff;
    color: #222;
}

input:focus {
    outline: none;
    border-color: #19a957;
    box-shadow: 0 0 0 2px rgba(25, 169, 87, 0.12);
}

/* ================================
   BUTTONS
================================ */

button {
    border: 1px solid #19a957;
    border-radius: 7px;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    background: #ffffff;
    color: #19a957;
    box-shadow: none;
    transition: 0.15s;
}

button:hover {
    background: #eaf9f0;
    transform: none;
}

button:active {
    transform: scale(0.98);
}

.login-card button {
    width: 100%;
    background: #19a957;
    color: #ffffff;
}

/* ================================
   LOGIN ERROR
================================ */

#login-error {
    margin-top: 12px;
    padding: 8px;
    border-radius: 6px;
    color: #dc2626;
    background: #fff1f1;
    font-size: 13px;
}

/* ================================
   DASHBOARD
================================ */

#dashboard {
    width: 100%;
    max-width: 500px;
    margin: auto;
    padding: 0 10px 20px;
}

/* ================================
   HEADER
================================ */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 -10px 15px;
    padding: 13px 12px;
    background: #bdf0cf;
    border-radius: 0 0 10px 10px;
    border-bottom: 2px solid #8fddb0;
    box-shadow: none;
}

header h1 {
    margin: 0;
    color: #168d4a;
    font-size: 21px;
    font-weight: 900;
}

#shop-name {
    color: #277a4b;
    margin-top: 3px;
    font-size: 12px;
    font-weight: 800;
}

.logout {
    background: #ffffff;
    color: #19a957;
    border: 1px solid #19a957;
    padding: 7px 10px;
    font-size: 12px;
}

/* ================================
   SALES
================================ */

.sales-card {
    background: #bdf0cf;
    color: #168d4a;
    padding: 17px 12px;
    border-radius: 9px;
    text-align: center;
    margin-bottom: 12px;
    border: 1px solid #8fddb0;
    box-shadow: none;
}

.sales-title {
    font-size: 14px;
    font-weight: 900;
}

#today-sales {
    font-size: 30px;
    font-weight: 900;
    margin-top: 5px;
}

/* ================================
   TODAY REPORT
================================ */

.sales-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 7px;
    margin-bottom: 17px;
}

.sales-card-small {
    background: #ffffff;
    padding: 10px;
    border-radius: 7px;
    border: 1px solid #c4ead2;
    box-shadow: none;
}

.sales-card-small h3 {
    margin: 0 0 5px;
    font-size: 12px;
    color: #19a957;
}

.sales-card-small div {
    font-size: 16px;
    font-weight: 900;
    color: #168d4a;
}

.profit-card {
    border-color: #9bdfb5;
}

.profit-card div {
    color: #168d4a;
}

/* ================================
   SECTIONS
================================ */

section {
    display: block;
    width: 100%;
    margin-bottom: 18px;
}

h2 {
    margin: 0 0 9px;
    color: #168d4a;
    font-size: 17px;
    font-weight: 900;
}

/* ================================
   MENU
================================ */

.menu-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 20px;
}

.menu-button {
    position: relative;
    min-height: 62px;
    background: #ffffff;
    color: #19a957;
    border-radius: 7px;
    padding: 10px 8px;
    display: flex;
    align-items: center;
    gap: 7px;
    text-align: left;
    border: 1px solid #b7e8c9;
    box-shadow: none;
}

.menu-button:hover {
    background: #f1fcf5;
}

.menu-icon {
    font-size: 22px;
    min-width: 27px;
    text-align: center;
}

.menu-button strong {
    display: block;
    font-size: 13px;
    color: #19a957;
    font-weight: 900;
}

.menu-button small {
    display: none;
}

.low-stock-count {
    position: absolute;
    top: 5px;
    right: 5px;
    margin: 0;
    background: #ef4444;
    color: #ffffff;
    min-width: 20px;
    height: 20px;
    padding: 2px 5px;
    border-radius: 20px;
    text-align: center;
    font-size: 11px;
    font-weight: 900;
}

/* ================================
   STOCK + TRANSACTIONS
================================ */

#stock-list,
#transactions,
#low-stock-list,
#order-list {
    display: block;
    width: 100%;
}

.transaction {
    width: 100%;
    background: #ffffff;
    border-radius: 7px;
    padding: 11px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    border: 1px solid #c4ead2;
    border-left: 3px solid #19a957;
    box-shadow: none;
}

.transaction:hover {
    transform: none;
    box-shadow: none;
}

.transaction strong {
    color: #168d4a;
    font-size: 13px;
}

.transaction span {
    color: #555;
    font-size: 12px;
    line-height: 1.45;
}

/* ================================
   SECTION HEADER
================================ */

.dashboard-section {
    width: 100%;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #c4ead2;
}

.section-header h2 {
    margin: 0;
    font-size: 17px;
}

.back-button {
    background: #ffffff;
    color: #19a957;
    border: 1px solid #19a957;
    padding: 7px 10px;
    font-size: 12px;
}

/* ================================
   REFRESH
================================ */

.refresh-button {
    width: 100%;
    margin-bottom: 10px;
    background: #19a957;
    color: #ffffff;
    border-color: #19a957;
}

/* ================================
   MONTHLY REPORT
================================ */

#monthly-results {
    margin-top: 12px;
}

#monthly-results > div {
    background: #ffffff;
    border: 1px solid #c4ead2;
    border-radius: 7px;
    padding: 10px;
    margin-bottom: 7px;
    color: #555;
    font-size: 13px;
}

#monthly-results strong {
    color: #19a957;
}

/* ================================
   ORDER DESCRIPTION
================================ */

.order-description {
    background: #f1fcf5;
    border: 1px solid #c4ead2;
    border-radius: 7px;
    padding: 9px;
    margin-bottom: 10px;
    color: #555;
    font-size: 12px;
}

/* ================================
   MOBILE PHONE
================================ */

@media (max-width: 500px) {

    #dashboard {
        padding: 0 8px 20px;
    }

    header {
        margin-left: -8px;
        margin-right: -8px;
        padding: 12px 10px;
    }

    header h1 {
        font-size: 20px;
    }

    .menu-buttons {
        grid-template-columns: 1fr 1fr;
        gap: 7px;
    }

    .menu-button {
        min-height: 58px;
        padding: 8px 7px;
    }

    .menu-icon {
        font-size: 20px;
        min-width: 24px;
    }

    .menu-button strong {
        font-size: 12px;
    }

    .sales-card {
        padding: 15px 10px;
    }

    #today-sales {
        font-size: 28px;
    }

    .sales-card-small {
        padding: 9px;
    }

    .sales-card-small h3 {
        font-size: 11px;
    }

    .sales-card-small div {
        font-size: 15px;
    }
}

/* ================================
   VERY SMALL PHONES
================================ */

@media (max-width: 360px) {

    #dashboard {
        padding-left: 6px;
        padding-right: 6px;
    }

    header {
        margin-left: -6px;
        margin-right: -6px;
    }

    header h1 {
        font-size: 18px;
    }

    .menu-buttons {
        gap: 5px;
    }

    .menu-button {
        min-height: 54px;
        padding: 7px 5px;
    }

    .menu-icon {
        font-size: 18px;
        min-width: 21px;
    }

    .menu-button strong {
        font-size: 11px;
    }
}
```