/* 全站可复用弹层：confirm / alert */

.ui-backdrop {
    position: fixed;
    inset: 0;
    z-index: 90;
    background: rgba(8, 16, 30, 0.32);
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
    opacity: 0;
    transition: opacity 0.28s ease;
}
.ui-backdrop.is-open { opacity: 1; }

.ui-dialog {
    position: fixed;
    z-index: 100;
    left: 50%;
    top: 50%;
    width: min(380px, calc(100vw - 32px));
    padding: 24px 22px 18px;
    border-radius: 24px;
    text-align: center;
    background:
        linear-gradient(160deg, rgba(255, 255, 255, 0.82) 0%, rgba(255, 255, 255, 0.52) 100%);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.92) inset,
        0 24px 64px rgba(20, 40, 80, 0.22);
    backdrop-filter: blur(48px) saturate(220%);
    -webkit-backdrop-filter: blur(48px) saturate(220%);
    opacity: 0;
    transform: translate(-50%, -46%) scale(0.94);
    transition:
        opacity 0.3s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.36s cubic-bezier(0.22, 1, 0.36, 1);
}
.ui-dialog.is-open {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.ui-backdrop[hidden],
.ui-dialog[hidden] {
    display: block !important;
    visibility: hidden;
    pointer-events: none;
}
.ui-backdrop.is-open[hidden],
.ui-dialog.is-open[hidden] {
    visibility: visible;
    pointer-events: auto;
}

.ui-dialog-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 14px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-size: 22px;
    font-weight: 700;
    color: var(--accent-deep, #0b4fd6);
    background: var(--accent-soft, rgba(26, 109, 255, 0.14));
    box-shadow: 0 8px 20px rgba(40, 70, 120, 0.08);
}
.ui-dialog.is-danger .ui-dialog-icon {
    color: #b42318;
    background: rgba(255, 59, 48, 0.12);
}
.ui-dialog-icon::before { content: "!"; }

.ui-dialog-title {
    margin: 0 0 8px;
    font-size: 18px;
    letter-spacing: -0.02em;
    font-weight: 700;
    color: var(--ink, #0b1220);
}
.ui-dialog-msg {
    margin: 0 0 20px;
    font-size: 14px;
    line-height: 1.55;
    color: var(--muted, rgba(11, 18, 32, 0.58));
}

.ui-dialog-actions {
    display: flex;
    gap: 10px;
}
.ui-btn {
    appearance: none;
    flex: 1;
    border: 0;
    border-radius: 14px;
    padding: 12px 14px;
    font: inherit;
    font-size: 14px;
    font-weight: 650;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.2s ease, background 0.2s ease, filter 0.2s ease;
}
.ui-btn:active { transform: scale(0.98); }
.ui-btn-ghost {
    background: rgba(255, 255, 255, 0.55);
    color: var(--ink, #0b1220);
    border: 1px solid rgba(255, 255, 255, 0.7);
}
.ui-btn-ghost:hover { background: rgba(255, 255, 255, 0.82); }
.ui-btn-primary {
    background: linear-gradient(180deg, var(--accent, #1a6dff) 0%, var(--accent-deep, #0b4fd6) 100%);
    color: #fff;
    box-shadow: 0 10px 24px var(--accent-glow, rgba(26, 109, 255, 0.28));
}
.ui-btn-primary:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
}
.ui-dialog.is-danger .ui-btn-primary {
    background: linear-gradient(180deg, #ff5a5f 0%, #d9363e 100%);
    box-shadow: 0 10px 24px rgba(217, 54, 62, 0.28);
}
.ui-dialog.is-alert .ui-dialog-actions { justify-content: center; }
.ui-dialog.is-alert #ui-dialog-cancel { display: none; }
.ui-dialog.is-alert .ui-btn-primary { flex: 0 1 160px; }

.ui-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%) translateY(12px);
    z-index: 110;
    padding: 10px 16px;
    border-radius: 14px;
    background: rgba(20, 28, 40, 0.84);
    color: #fff;
    font-size: 14px;
    backdrop-filter: blur(12px);
    opacity: 0;
    transition: opacity 0.28s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
    max-width: min(88vw, 360px);
    text-align: center;
}
.ui-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

body.ui-dialog-open { overflow: hidden; }

@media (max-width: 480px) {
    .ui-dialog {
        left: 16px;
        right: 16px;
        width: auto;
        transform: translateY(12px) scale(0.98);
    }
    .ui-dialog.is-open {
        transform: translateY(0) scale(1);
        left: 16px;
        top: 50%;
        translate: 0 -50%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ui-backdrop, .ui-dialog, .ui-toast, .ui-btn { transition: none !important; }
}