.mini-app-overlay {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.58);
}

body.mini-app-open {
    overflow: hidden;
}

.mini-app-overlay.active {
    display: flex;
    align-items: stretch;
    justify-content: center;
}

.mini-app-window {
    position: relative;
    display: flex;
    width: min(100%, 900px);
    height: 100%;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
    box-shadow: var(--shadow-xl);
}

.mini-app-window.expanded {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: 0;
}

.mini-app-header {
    position: relative;
    z-index: 2;
    display: flex;
    min-height: 58px;
    align-items: center;
    gap: 12px;
    padding: max(8px, env(safe-area-inset-top)) 14px 8px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.mini-app-header-button {
    display: grid;
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: var(--text-primary);
    background: transparent;
    font-size: 16px;
    cursor: pointer;
}

.mini-app-header-button:hover {
    background: var(--bg-tertiary);
}

.mini-app-heading {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
    gap: 2px;
    text-align: center;
}

.mini-app-heading strong,
.mini-app-heading span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mini-app-heading strong {
    font-size: 15px;
}

.mini-app-heading span {
    color: var(--text-muted);
    font-size: 11px;
}

.mini-app-window iframe {
    display: block;
    width: 100%;
    min-height: 0;
    flex: 1;
    border: 0;
    background: var(--bg-primary);
}

.mini-app-loading {
    position: absolute;
    inset: 58px 0 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-muted);
    background: var(--bg-primary);
    font-size: 14px;
}

.mini-app-loading[hidden] {
    display: none;
}

.mini-app-main-action {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 3;
    padding: 12px 16px max(12px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.mini-app-main-action[hidden] {
    display: none;
}

.mini-app-main-action button {
    width: 100%;
    min-height: 46px;
    border: 0;
    border-radius: 12px;
    color: #fff;
    background: var(--accent);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.mini-app-main-action button:disabled {
    cursor: wait;
    opacity: 0.65;
}

@media (min-width: 769px) {
    .mini-app-overlay {
        align-items: center;
        padding: 24px;
    }

    .mini-app-window {
        height: min(900px, 100%);
        border: 1px solid var(--border-color);
        border-radius: 16px;
    }

    .mini-app-header {
        padding-top: 8px;
    }
}