:root {
    --sn-fg:           #161616;
    --sn-fg-muted:     #525252;
    --sn-fg-subtle:    #6f6f6f;
    --sn-bg:           #ffffff;
    --sn-bg-hover:     #f4f4f4;
    --sn-border:       #e0e0e0;
    --sn-overlay:      rgba(22, 22, 22, .55);

    --sn-link:         #0f62fe;
    --sn-link-hover:   #0043ce;
    --sn-link-soft:    rgba(15, 98, 254, .15);

    --sn-warn-bg:      #fcf4d6;
    --sn-warn-rule:    #f1c21b;
    --sn-info-bg:      #edf5ff;
    --sn-info-rule:    #0f62fe;
    --sn-danger-bg:    #fff1f1;
    --sn-danger-rule:  #da1e28;

    --sn-ease:         cubic-bezier(.2, 0, .2, 1);
    --sn-focus-ring:   0 0 0 2px var(--sn-bg), 0 0 0 4px var(--sn-link);

    --sn-space-1:      4px;
    --sn-space-2:      8px;
    --sn-space-3:      12px;
    --sn-space-4:      16px;
    --sn-space-5:      20px;
    --sn-space-6:      24px;
}

#sn-stack {
    margin: 0 0 var(--sn-space-6);
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--sn-space-2);
    list-style: none;
}

.sn-bar {
    opacity: 0;
    transform: translateY(-4px);
    animation: sn-in .25s var(--sn-ease) forwards;
}
@keyframes sn-in {
    to { opacity: 1; transform: translateY(0); }
}

.sn-bar-inner {
    display: flex;
    align-items: flex-start;
    gap: var(--sn-space-3);
    padding: 14px var(--sn-space-4);
    font-size: 14px;
    line-height: 1.45;
    color: var(--sn-fg);
    background: var(--sn-warn-bg);
    border-inline-start: 2px solid var(--sn-warn-rule);
}
.sn-bar[data-level="info"]   .sn-bar-inner { background: var(--sn-info-bg);   border-inline-start-color: var(--sn-info-rule); }
.sn-bar[data-level="danger"] .sn-bar-inner { background: var(--sn-danger-bg); border-inline-start-color: var(--sn-danger-rule); }

.sn-ico {
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    margin-block-start: 1px;
    color: var(--sn-warn-rule);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.sn-bar[data-level="info"]   .sn-ico { color: var(--sn-info-rule); }
.sn-bar[data-level="danger"] .sn-ico { color: var(--sn-danger-rule); }
.sn-ico svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

.sn-txt {
    flex: 1 1 auto;
    min-width: 0;
    color: var(--sn-fg-muted);
}
.sn-txt-title {
    display: block;
    margin-block-end: 2px;
    color: var(--sn-fg);
    letter-spacing: -0.005em;
}

.sn-act {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: var(--sn-space-1);
    margin-inline: var(--sn-space-1);
    padding: 2px var(--sn-space-1);
    background: none;
    border: 0;
    cursor: pointer;
    color: var(--sn-link);
    font: inherit;
    text-decoration: none;
    white-space: nowrap;
    transition: color .15s var(--sn-ease);
}
.sn-act:hover { color: var(--sn-link-hover); text-decoration: underline; text-underline-offset: 2px; }
.sn-act:focus-visible { outline: 0; box-shadow: var(--sn-focus-ring); }
.sn-act svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform .15s var(--sn-ease); }
.sn-act:hover svg { transform: translateX(2px); }

.sn-dis {
    flex: 0 0 auto;
    width: 24px;
    height: 24px;
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
    color: var(--sn-fg-subtle);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color .15s var(--sn-ease), color .15s var(--sn-ease);
}
.sn-dis:hover { background: rgba(0, 0, 0, .06); color: var(--sn-fg); }
.sn-dis:focus-visible { outline: 0; box-shadow: var(--sn-focus-ring); }
.sn-dis svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.sn-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 10000;
    padding: var(--sn-space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sn-overlay);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .15s var(--sn-ease), visibility 0s linear .15s;
}
.sn-modal-backdrop.sn-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity .15s var(--sn-ease), visibility 0s linear 0s;
}

.sn-modal {
    width: 100%;
    max-width: 560px;
    max-height: min(85vh, 720px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--sn-bg);
    color: var(--sn-fg);
    border: 1px solid var(--sn-border);
    transform: translateY(8px);
    transition: transform .15s var(--sn-ease);
}
.sn-modal:focus { outline: 0; }
.sn-modal-backdrop.sn-open .sn-modal { transform: translateY(0); }

.sn-modal-head {
    display: flex;
    align-items: center;
    gap: var(--sn-space-3);
    padding: 18px var(--sn-space-5) 14px;
    border-block-end: 1px solid var(--sn-border);
}
.sn-modal-title {
    flex: 1 1 auto;
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.005em;
    color: var(--sn-fg);
}
.sn-modal-close {
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
    color: var(--sn-fg-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color .15s var(--sn-ease), color .15s var(--sn-ease);
}
.sn-modal-close:hover { background: var(--sn-bg-hover); color: var(--sn-fg); }
.sn-modal-close:focus-visible { outline: 0; box-shadow: var(--sn-focus-ring); }
.sn-modal-close svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.sn-modal-body {
    padding: var(--sn-space-5);
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.6;
    color: var(--sn-fg-muted);
}
.sn-modal-body :first-child { margin-block-start: 0; }
.sn-modal-body :last-child  { margin-block-end: 0; }
.sn-modal-body p  { margin: 0 0 var(--sn-space-3); }
.sn-modal-body ul,
.sn-modal-body ol { padding-inline-start: var(--sn-space-5); margin: 0 0 var(--sn-space-3); }
.sn-modal-body a  { color: var(--sn-link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.sn-modal-body a:hover { color: var(--sn-link-hover); }

.sn-scroll-lock { overflow: hidden; }

.sn-modal-body.sn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    padding: 48px var(--sn-space-5);
}
.sn-spinner {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 4px solid var(--sn-link-soft);
    border-top-color: var(--sn-link);
    animation: sn-spin .8s linear infinite;
}
@keyframes sn-spin { to { transform: rotate(360deg); } }

@media (max-width: 600px) {
    .sn-bar-inner     { padding: var(--sn-space-3) 14px; gap: 10px; font-size: 13px; flex-wrap: wrap; }
    .sn-modal-backdrop{ padding: var(--sn-space-3); }
    .sn-modal         { max-height: calc(100vh - 24px); }
    .sn-spinner       { width: 48px; height: 48px; border-width: 3px; }
}

@media (prefers-reduced-motion: reduce) {
    .sn-bar,
    .sn-modal,
    .sn-modal-backdrop,
    .sn-act svg,
    .sn-spinner {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}