* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #f6f7f9;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-text-size-adjust: 100%;
}

.landing {
    min-height: 100%;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 20px;
    text-align: center;
}

.landing.is-hidden {
    display: none;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid #e5e7eb;
    border-top-color: #6366f1;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.landing-title {
    margin: 20px 0 8px;
    font-size: 17px;
    font-weight: 600;
    color: #111827;
}

.landing-desc {
    margin: 0;
    font-size: 14px;
    color: #6b7280;
    line-height: 1.5;
}

.retry-btn {
    display: none;
    margin-top: 24px;
    padding: 12px 28px;
    border: none;
    border-radius: 999px;
    background: #6366f1;
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
}

.retry-btn.show {
    display: inline-block;
}