.ui-layer {
    position: relative;
    z-index: 200;
    pointer-events: none;
}

.ui-toasts {
    position: fixed;
    top: calc(12px + var(--chat-safe-top, 0px));
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: min(92vw, 380px);
    pointer-events: none;
    z-index: 220;
}

.ui-toast {
    width: 100%;
    padding: 12px 16px;
    border-radius: 14px;
    background: var(--chat-bg-elevated, #fff);
    color: var(--chat-text, #111);
    border: 1px solid var(--chat-border-strong, rgba(0, 0, 0, 0.08));
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.14);
    font-size: 14px;
    font-weight: 550;
    text-align: center;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    transition: opacity 180ms ease, transform 180ms ease;
}

.ui-toast.is-in {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.ui-toast.is-out {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
}

.ui-toast--success {
    border-color: color-mix(in srgb, #16a34a 28%, transparent);
}

.ui-toast--error {
    border-color: color-mix(in srgb, var(--chat-danger, #dc2626) 35%, transparent);
    color: var(--chat-danger, #dc2626);
}

.ui-toast--info {
    border-color: color-mix(in srgb, var(--chat-accent, #2563eb) 22%, transparent);
}

.ui-modal {
    position: fixed;
    inset: 0;
    z-index: 210;
    display: grid;
    place-items: center;
    padding: 20px;
    pointer-events: auto;
}

.ui-modal[hidden] {
    display: none !important;
}

.ui-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.ui-modal__card {
    position: relative;
    width: min(100%, 400px);
    padding: 22px 20px 16px;
    border-radius: 18px;
    background: var(--chat-bg-elevated, #fff);
    color: var(--chat-text, #111);
    border: 1px solid var(--chat-border-strong, rgba(0, 0, 0, 0.08));
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22);
    animation: ui-modal-in 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes ui-modal-in {
    from { opacity: 0; transform: translateY(8px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.ui-modal__title {
    font-size: 17px;
    font-weight: 650;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

.ui-modal__message {
    margin: 0;
    font-size: 14px;
    line-height: 1.45;
    color: var(--chat-text-secondary, #4b5563);
}

.ui-modal__message[hidden] {
    display: none !important;
}

.ui-modal__field {
    margin-top: 14px;
}

.ui-modal__field[hidden] {
    display: none !important;
}

.ui-modal__input {
    width: 100%;
    min-height: 42px;
    padding: 0 12px;
    border-radius: 12px;
    border: 1px solid var(--chat-border-strong, rgba(0, 0, 0, 0.12));
    background: var(--chat-bg-main, #fff);
    color: var(--chat-text, #111);
    outline: none;
    box-sizing: border-box;
}

.ui-modal__input:focus {
    border-color: var(--chat-accent, #2563eb);
    box-shadow: 0 0 0 3px var(--chat-accent-soft, #eff6ff);
}

.ui-modal__actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 18px;
}

.ui-btn {
    min-height: 38px;
    padding: 0 14px;
    border-radius: 999px;
    font-size: 13.5px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 140ms ease, color 140ms ease, transform 140ms ease;
}

.ui-btn:active {
    transform: scale(0.97);
}

.ui-btn--ghost {
    color: var(--chat-text-secondary, #4b5563);
    background: transparent;
}

.ui-btn--ghost:hover {
    background: var(--chat-bg-hover, rgba(0, 0, 0, 0.05));
    color: var(--chat-text, #111);
}

.ui-btn--primary {
    background: #0f172a;
    color: #fff;
}

.ui-btn--primary:hover {
    background: #1e293b;
}

.ui-btn--danger {
    background: var(--chat-danger, #dc2626);
    color: #fff;
}

.ui-btn--danger:hover {
    filter: brightness(1.05);
}

html[data-theme="dark"] .ui-btn--primary {
    background: #f8fafc;
    color: #0f172a;
}

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

@media (max-width: 640px) {
    .ui-modal {
        align-items: end;
        padding: 0;
    }

    .ui-modal__card {
        width: 100%;
        border-radius: 20px 20px 0 0;
        padding: 20px 16px calc(16px + var(--chat-safe-bottom, 0px));
    }

    .ui-modal__actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .ui-btn {
        min-height: 44px;
    }
}