* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f5f7fb;
    color: #172033;
    font-family: Arial, Helvetica, sans-serif;
}

a {
    color: #2454d6;
    text-decoration: none;
}

.topbar {
    align-items: center;
    background: #15213a;
    color: #fff;
    display: flex;
    gap: 24px;
    justify-content: space-between;
    padding: 16px 24px;
}

.topbar a {
    color: #fff;
}

.brand {
    font-size: 20px;
    font-weight: 700;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.container {
    margin: 0 auto;
    max-width: 1100px;
    padding: 28px 18px 48px;
}

.card {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 26px rgba(30, 42, 70, 0.08);
    margin-bottom: 20px;
    padding: 22px;
}

.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.flip-card {
    min-height: 230px;
    perspective: 1000px;
}

.flip-inner {
    height: 100%;
    min-height: 230px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.45s ease;
}

.flip-card.is-flipped .flip-inner {
    transform: rotateY(180deg);
}

.flip-face {
    backface-visibility: hidden;
    inset: 0;
    margin: 0;
    position: absolute;
    width: 100%;
}

.flip-front {
    border: 0;
    color: inherit;
    min-height: 230px;
    text-align: left;
}

.flip-back {
    min-height: 230px;
    transform: rotateY(180deg);
}

.drink-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
}

.drink-title {
    display: block;
    font-size: 28px;
    font-weight: 700;
}

.price {
    color: #506070;
    font-size: 18px;
    font-weight: 700;
}

.hint {
    color: #738096;
    font-size: 14px;
}

.quantity-buttons {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(5, 1fr);
}

button,
.button {
    background: #2454d6;
    border: 0;
    border-radius: 12px;
    color: #fff;
    cursor: pointer;
    display: inline-block;
    font-size: 16px;
    font-weight: 700;
    padding: 12px 16px;
}

button.secondary,
.button.secondary {
    background: #e8ecf7;
    color: #172033;
}

input,
select {
    border: 1px solid #d8deea;
    border-radius: 10px;
    font-size: 16px;
    padding: 11px 12px;
    width: 100%;
}

label {
    display: block;
    font-weight: 700;
    margin-bottom: 6px;
}

.form-row {
    margin-bottom: 14px;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid #e6eaf2;
    padding: 10px;
    text-align: left;
}

.flash {
    background: #e7f8ed;
    border: 1px solid #a9dfbd;
    border-radius: 12px;
    margin-bottom: 18px;
    padding: 12px 14px;
}

.danger {
    color: #b00020;
}

.tablet .container {
    max-width: 1300px;
}

.tablet .drink-card button {
    font-size: 22px;
    min-height: 72px;
}

.tablet .flip-card,
.tablet .flip-inner,
.tablet .flip-front,
.tablet .flip-back {
    min-height: 280px;
}

@media (max-width: 700px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }
}