.prepare-shell {
    min-height: calc(100dvh - 120px);
    display: grid;
    place-items: center;
    padding: 24px;
    background: linear-gradient(145deg, #f4f8ff 0%, #eef9f7 100%);
}

.prepare-card {
    width: min(540px, 100%);
    padding: 48px 32px;
    text-align: center;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 18px 55px rgba(31, 74, 125, 0.12);
}

.prepare-card h1 {
    margin: 22px 0 12px;
    font-size: 24px;
    color: #183153;
}

.prepare-card p {
    margin: 0;
    line-height: 1.8;
    color: #65758b;
}

.prepare-spinner {
    position: relative;
    width: 54px;
    height: 54px;
    margin: 0 auto;
    display: grid;
    place-items: center;
    color: #3978e6;
    font-size: 17px;
    font-weight: 700;
}

.prepare-spinner::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 5px solid #e3edff;
    border-top-color: #3978e6;
    border-radius: 50%;
    animation: prepare-spin 0.9s linear infinite;
}

.prepare-icon {
    width: 54px;
    height: 54px;
    margin: 0 auto;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: #e46262;
    font-size: 30px;
    font-weight: 700;
}

.prepare-icon-success {
    background: #2eae76;
}

.prepare-result {
    margin-top: 24px;
    text-align: left;
}

.prepare-result label,
.prepare-code-row span {
    display: block;
    margin-bottom: 8px;
    color: #607089;
    font-size: 14px;
}

.prepare-result input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border: 1px solid #d8e2f0;
    border-radius: 10px;
    color: #263b59;
    background: #f8faff;
}

.prepare-code-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding: 11px 14px;
    border-radius: 10px;
    background: #f2f7ff;
}

.prepare-code-row span {
    margin: 0;
}

.prepare-code-row strong {
    color: #2366cf;
    font-size: 17px;
    letter-spacing: 2px;
    user-select: all;
}

.prepare-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 22px;
}

.prepare-button {
    min-height: 44px;
    padding: 12px 16px;
    border: 1px solid #3978e6;
    border-radius: 10px;
    cursor: pointer;
    font-size: 15px;
}

.prepare-button-copy {
    color: #3978e6;
    background: #fff;
}

.prepare-button-open {
    color: #fff;
    background: #3978e6;
}

.prepare-button-return {
    border-color: #cbd7e7;
    color: #415875;
    background: #fff;
}

.prepare-feedback {
    min-height: 25px;
    margin-top: 10px !important;
    text-align: center;
    color: #3978e6 !important;
    font-size: 14px;
}

.prepare-failure-actions {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
}

.prepare-retry,
.prepare-return {
    min-height: 44px;
    padding: 10px 24px;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    font-size: 15px;
    text-decoration: none;
}

.prepare-retry {
    color: #fff;
    background: #3978e6;
}

.prepare-return {
    border: 1px solid #cbd7e7;
    color: #415875;
    background: #fff;
}

@keyframes prepare-spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 520px) {
    .prepare-shell {
        min-height: calc(100dvh - 72px);
        padding: max(16px, env(safe-area-inset-top)) 14px max(16px, env(safe-area-inset-bottom));
    }

    .prepare-card {
        padding: 38px 20px;
    }

    .prepare-actions {
        grid-template-columns: 1fr;
    }
}