:root {
    --toast-surface: rgba(20, 26, 39, 0.9);
    --toast-border: rgba(189, 200, 226, 0.18);
    --toast-shadow: 0 16px 40px rgba(0,0,0,.35);
    --toast-radius: 16px;
    --toast-gap: 12px;
    --toast-padding: 14px 16px 16px 16px;
    --toast-title: #eef3ff;
    --toast-text: #c7d2e5;
    --toast-success: #2ecc71;
    --toast-warning: #ff9f43;
    --toast-error: #ff5c5c;
    --toast-success-soft: rgba(46, 204, 113, 0.14);
    --toast-warning-soft: rgba(255, 159, 67, 0.16);
    --toast-error-soft: rgba(255, 92, 92, 0.16);
    --toast-progress-height: 3px;
}

#notification-root {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--toast-gap);
    pointer-events: none;
}

.toast {
    position: relative;
    display: grid;
    grid-template-columns: 28px auto;
    grid-template-rows: auto auto;
    column-gap: 12px;
    row-gap: 6px;
    padding: var(--toast-padding);
    min-width: 320px;
    max-width: 420px;
    color: var(--toast-text);
    background:
        radial-gradient(180px 120px at 110% -20%, rgba(120,84,255,.16), transparent 60%),
        radial-gradient(180px 120px at -10% -30%, rgba(64,87,255,.16), transparent 60%),
        var(--toast-surface);
    border: 1px solid var(--toast-border);
    border-radius: var(--toast-radius);
    box-shadow: var(--toast-shadow);
    pointer-events: auto;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    overflow: hidden;
    transform-origin: top right;
    animation: toast-in 220ms cubic-bezier(.2,.7,.2,1) both;
}

.toast.closing {
    animation: toast-out 160ms ease forwards;
}

.toast__icon {
    grid-row: 1 / span 2;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
}

.toast__title {
    margin: 0;
    font-size: 0.98rem;
    font-weight: 800;
    color: var(--toast-title);
    line-height: 1.2;
}

.toast__message {
    margin: 0;
    font-size: 0.96rem;
    line-height: 1.4;
    color: var(--toast-text);
}

.toast--success {
    box-shadow: 0 10px 30px rgba(46, 204, 113, .15), var(--toast-shadow);
}
.toast--warning {
    box-shadow: 0 10px 30px rgba(255, 159, 67, .15), var(--toast-shadow);
}
.toast--error {
    box-shadow: 0 10px 30px rgba(255, 92, 92, .18), var(--toast-shadow);
}

.toast--success .toast__icon svg {
    color: var(--toast-success);
}
.toast--warning .toast__icon svg {
    color: var(--toast-warning);
}
.toast--error .toast__icon svg {
    color: var(--toast-error);
}

.toast--success {
    border-color: rgba(46,204,113,.28);
    background-image:
        radial-gradient(160px 100px at 110% -20%, rgba(46,204,113,.16), transparent 60%),
        radial-gradient(200px 120px at -20% -30%, var(--toast-success-soft), transparent 60%),
        var(--toast-surface);
}
.toast--warning {
    border-color: rgba(255,159,67,.28);
    background-image:
        radial-gradient(160px 100px at 110% -20%, rgba(255,159,67,.16), transparent 60%),
        radial-gradient(200px 120px at -20% -30%, var(--toast-warning-soft), transparent 60%),
        var(--toast-surface);
}
.toast--error {
    border-color: rgba(255,92,92,.30);
    background-image:
        radial-gradient(160px 100px at 110% -20%, rgba(255,92,92,.16), transparent 60%),
        radial-gradient(200px 120px at -20% -30%, var(--toast-error-soft), transparent 60%),
        var(--toast-surface);
}

.toast__progress {
    position: absolute;
    left: 0;
    bottom: 0;
    height: var(--toast-progress-height);
    width: 100%;
    transform-origin: left center;
    animation: toast-progress var(--duration, 4000ms) linear forwards;
}

.toast--success .toast__progress {
    background: linear-gradient(90deg, rgba(46,204,113,.95), rgba(46,204,113,.65));
}
.toast--warning .toast__progress {
    background: linear-gradient(90deg, rgba(255,159,67,.95), rgba(255,159,67,.65));
}
.toast--error .toast__progress {
    background: linear-gradient(90deg, rgba(255,92,92,.95), rgba(255,92,92,.65));
}

.toast:hover .toast__progress {
    animation-play-state: paused;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateY(-8px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-out {
    to { opacity: 0; transform: translateY(-6px) scale(.98); }
}

@keyframes toast-progress {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

@media (max-width: 560px) {
    #notification-root {
        right: 12px;
        left: 12px;
        top: 12px;
        align-items: flex-end;
    }
    .toast {
        width: 100%;
        max-width: none;
    }
}