.koo-dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.32);
    animation: koo-dialog-fade-in 160ms ease-out;
}

.koo-dialog {
    box-sizing: border-box;
    width: 100%;
    max-width: 420px;
    max-height: calc(100vh - 40px);
    max-height: calc(100dvh - 40px);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 18px 48px rgba(15, 23, 42, 0.16);
    color: var(--text-primary, #111827);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 24px;
    animation: koo-dialog-rise-in 180ms ease-out;
}

.koo-dialog-success {
    border-top: 4px solid #16a34a;
}

.koo-dialog-error {
    border-top: 4px solid #dc2626;
}

.koo-dialog-warning {
    border-top: 4px solid #d97706;
}

.koo-dialog-info {
    border-top: 4px solid var(--primary-color, #2563eb);
}

.koo-dialog-title {
    margin: 0;
    color: var(--text-primary, #111827);
    font-size: 20px;
    font-weight: 650;
    line-height: 1.35;
}

.koo-dialog-message {
    margin-top: 12px;
    color: var(--text-secondary, #6b7280);
    font-size: 15px;
    line-height: 1.6;
    overflow-wrap: break-word;
}

.koo-dialog-input {
    box-sizing: border-box;
    width: 100%;
    margin-top: 18px;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 8px;
    background: #fff;
    color: var(--text-primary, #111827);
    font: inherit;
    line-height: 1.4;
    padding: 10px 12px;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.koo-dialog-input::placeholder {
    color: var(--text-secondary, #9ca3af);
}

.koo-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
}

.koo-dialog-button {
    min-width: 84px;
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 8px;
    background: #fff;
    color: var(--text-primary, #111827);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
    line-height: 1.2;
    padding: 10px 16px;
    transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.koo-dialog-button:hover {
    background: #f8fafc;
}

.koo-dialog-ok {
    border-color: #075985;
    background: #075985;
    color: #fff;
}

.koo-dialog-ok:hover {
    border-color: #064e6b;
    background: #064e6b;
    filter: none;
}

@supports (background: color-mix(in srgb, #000 50%, #fff)) {
    .koo-dialog-ok {
        border-color: color-mix(in srgb, var(--primary-color, #0ea5e9) 35%, #0f172a);
        background: color-mix(in srgb, var(--primary-color, #0ea5e9) 35%, #0f172a);
    }

    .koo-dialog-ok:hover {
        border-color: color-mix(in srgb, var(--primary-color, #0ea5e9) 25%, #0f172a);
        background: color-mix(in srgb, var(--primary-color, #0ea5e9) 25%, #0f172a);
    }
}

.koo-dialog-button-danger {
    border-color: #b91c1c;
    background: #b91c1c;
    color: #fff;
}

.koo-dialog-button-danger:hover {
    border-color: #991b1b;
    background: #991b1b;
    color: #fff;
}

.koo-dialog-button:focus-visible,
.koo-dialog-input:focus-visible,
.koo-toast-close:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.28);
    outline-offset: 2px;
}

.koo-dialog-input:focus-visible {
    border-color: var(--primary-color, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.koo-dialog-button-danger:focus-visible {
    border-color: #991b1b;
    background: #991b1b;
    color: #fff;
    outline-color: rgba(153, 27, 27, 0.42);
}

.koo-toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10001;
    display: flex;
    width: min(360px, calc(100vw - 40px));
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.koo-toast {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    border: 1px solid var(--border-color, #e5e7eb);
    border-left: 4px solid var(--primary-color, #2563eb);
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.14);
    color: var(--text-primary, #111827);
    padding: 13px 14px;
    pointer-events: auto;
    animation: koo-toast-slide-in 180ms ease-out;
}

.koo-toast-success,
.koo-toast--success {
    border-left-color: #16a34a;
}

.koo-toast-error,
.koo-toast--error {
    border-left-color: #dc2626;
}

.koo-toast-warning,
.koo-toast--warning {
    border-left-color: #d97706;
}

.koo-toast-info,
.koo-toast--info {
    border-left-color: #0284c7;
}

.koo-toast-message {
    flex: 1;
    color: var(--text-primary, #111827);
    font-size: 14px;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.koo-toast-close {
    flex: 0 0 auto;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary, #6b7280);
    cursor: pointer;
    font: inherit;
    font-size: 12px;
    line-height: 1.4;
    padding: 2px 4px;
}

.koo-toast-close:hover {
    background: #f1f5f9;
    color: var(--text-primary, #111827);
}

@keyframes koo-dialog-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes koo-dialog-rise-in {
    from { opacity: 0; transform: translateY(8px) scale(0.99); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes koo-toast-slide-in {
    from { opacity: 0; transform: translateX(12px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 520px) {
    .koo-dialog-overlay {
        align-items: flex-end;
        padding: 12px;
    }

    .koo-dialog {
        max-height: calc(100vh - 24px);
        max-height: calc(100dvh - 24px);
        padding: 20px;
    }

    .koo-dialog-actions {
        flex-direction: column-reverse;
    }

    .koo-dialog-button {
        width: 100%;
    }

    .koo-toast-container {
        top: 12px;
        right: 12px;
        width: calc(100vw - 24px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .koo-dialog-overlay,
    .koo-dialog,
    .koo-toast {
        animation: none;
        transition: none;
    }
}