:root,
[data-os-theme="light"] {
    color-scheme: light;

    --os-background-primary: #fff;
    --os-background-secondary: #f5f5f5;

    --os-text-primary: #333;
    --os-text-secondary: #666;
    --os-text-quaternary: #555;
    --os-text-tertiary--static: #999;

    --os-outline-tertiary: #d7d7d7;
    --os-outline-quaternary: #ccc;
    --os-outline-secondary--static: #aaa;

    --os-hover-secondary: #eaeaea;
    --os-fill-quinary: #eee;
    --os-focus: #3e94ff;

    --os-tab-bar-tab--inactive: #eaeaea;
    --os-tab-bar-text--active: #333;
    --os-tab-bar-text--inactive: #666;

    --os-parameter-checkbox-fill--checked: #1651b0;

    --os-success: #009400;
    --os-error: #d0342c;
    --os-success-background: #ddf6cc;
    --os-success-outline: #a2db7d;
    --os-warn-background: #fff8e6;
    --os-warn-outline: #fcda7f;
    --os-error-background: #f9ebec;
    --os-error-outline-secondary: #dd979b;
    --os-banner-close: #888;
}

/* Author display values (grid, flex) beat the browser's own [hidden] default. */
[hidden] {
    display: none !important;
}

[data-os-theme="dark"] {
    color-scheme: dark;

    --os-background-primary: #333;
    --os-background-secondary: #2c2c2c;

    --os-text-primary: #fff;
    --os-text-secondary: #ccc;
    --os-text-quaternary: #d7d7d7;
    --os-text-tertiary--static: #999;

    --os-outline-tertiary: #666;
    --os-outline-quaternary: #555;
    --os-outline-secondary--static: #aaa;

    --os-hover-secondary: #666;
    --os-fill-quinary: #555;
    --os-focus: #3e94ff;

    --os-tab-bar-tab--inactive: #1c1c1c;
    --os-tab-bar-text--active: #fff;
    --os-tab-bar-text--inactive: #ccc;

    --os-parameter-checkbox-fill--checked: #3e94ff;

    --os-success: #009400;
    --os-error: #f28b82;
    --os-success-background: #0b450b;
    --os-success-outline: #028502;
    --os-warn-background: #6a4f06;
    --os-warn-outline: #987107;
    --os-error-background: #683232;
    --os-error-outline-secondary: #932229;
    --os-banner-close: #888;
}

:root {
    /* ---- InfinitForm, not Onshape ---- */
    --if-accent: #a0ff00;
    --if-accent-text: #000;
    --if-accent-hover: color-mix(in srgb, var(--if-accent) 88%, transparent);
    --if-accent-pressed: color-mix(in srgb, var(--if-accent) 76%, transparent);
    --if-accent-disabled: color-mix(in srgb, var(--if-accent) 55%, transparent);

    --os-spacing-1: 1px;
    --os-spacing-3: 3px;
    --os-spacing-4: 4px;
    --os-spacing-5: 5px;
    --os-spacing-7: 7px;
    --os-spacing-10: 10px;
    --os-spacing-14: 16px;

    --os-radius-xs: var(--os-spacing-3);
    --os-radius-sm: var(--os-spacing-4);
    --os-radius-md: var(--os-spacing-5);

    --panel-font: Flama, "Open Sans", "Segoe UI", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --panel-font-mono: ui-monospace, "Cascadia Mono", Consolas, monospace;

    --panel-control-height: 32px;
}

* {
    box-sizing: border-box;

    scrollbar-color: var(--os-outline-tertiary) transparent;
    scrollbar-width: thin;
}

body {
    margin: 0;
    height: 100vh;
    overflow: hidden;
    display: grid;
    grid-template-rows: auto auto auto 1fr;
    background: var(--os-background-primary);
    color: var(--os-text-primary);
    font: 14px/1.4 var(--panel-font);
    -webkit-font-smoothing: antialiased;
}

:focus-visible {
    outline: 2px solid var(--os-focus);
    outline-offset: 1px;
}

/* ---- panel header ---- */

.panel-header {
    display: flex;
    align-items: center;
    gap: var(--os-spacing-7);
    padding: var(--os-spacing-5) var(--os-spacing-10);
    background: var(--os-background-primary);
}

.panel-brand {
    display: flex;
    align-items: center;
    gap: var(--os-spacing-5);
    min-width: 0;
}

.panel-mark {
    flex: none;
    width: 18px;
    height: 18px;
    border-radius: var(--os-radius-sm);
}

.panel-title {
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
}

.panel-status {
    display: inline-flex;
    align-items: center;
    gap: var(--os-spacing-4);
    margin-left: auto;
    min-width: 0;
    padding: 1px var(--os-spacing-5);
    border: 1px solid var(--os-outline-tertiary);
    border-radius: 9px;
    font-size: 12px;
    color: var(--os-text-secondary);
}

.panel-status::before {
    content: "";
    flex: none;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--os-text-tertiary--static);
}

.panel-status-on::before {
    background: var(--os-success);
}

.panel-status-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---- tab bar ---- */

.tab-bar {
    display: flex;
    gap: 2px;
    padding: var(--os-spacing-3) var(--os-spacing-3) 0;

    border-bottom: 1px solid var(--os-outline-quaternary);
    background: var(--os-background-primary);
}

.tab {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--os-spacing-4);
    flex: 1 1 auto;
    min-width: 0;
    padding: var(--os-spacing-5);

    border: 1px solid transparent;
    border-top-width: 2px;
    border-radius: var(--os-radius-md) var(--os-radius-md) 0 0;
    background: var(--os-tab-bar-tab--inactive);
    color: var(--os-tab-bar-text--inactive);
    font: inherit;
    font-size: 13px;
    white-space: nowrap;
    cursor: pointer;
}

.tab:not(.tab-active):hover {
    background: var(--os-background-secondary);
    color: var(--os-tab-bar-text--active);
}

.tab-active {
    border-color: var(--os-outline-quaternary);

    border-top-color: var(--if-accent);

    border-bottom-color: var(--os-background-primary);
    margin-bottom: -1px;
    background: var(--os-background-primary);
    color: var(--os-tab-bar-text--active);
    font-weight: 600;
}

.tab-blocked {
    color: var(--os-text-tertiary--static);
}

.tab-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.icon {
    flex: none;
    width: 14px;
    height: 14px;
}

/* ---- banners ---- */

#notice-area {
    padding: 0 var(--os-spacing-10);
    background: var(--os-background-primary);
}

#notice-area:not(:empty) {
    padding-top: var(--os-spacing-10);
}

.notice {
    display: flex;
    align-items: flex-start;
    gap: var(--os-spacing-7);
    padding: var(--os-spacing-5) var(--os-spacing-7);
    border: 1px solid var(--os-outline-tertiary);
    border-radius: var(--os-radius-sm);

    background: var(--os-background-secondary);
    font-size: 13px;
}

.notice-text {
    flex: 1;
    margin: 0;
    min-width: 0;
    white-space: pre-line;
    overflow-wrap: anywhere;
}

.notice-meta {
    display: block;
    margin-top: var(--os-spacing-3);
    font-size: 0.85em;
    color: var(--os-text-secondary);
    user-select: all;
    overflow-wrap: anywhere;
}

.notice-dismiss {
    flex: none;
    padding: 0 var(--os-spacing-1);
    border: 0;
    border-radius: var(--os-radius-xs);
    background: none;
    color: var(--os-banner-close);
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
}

.notice-dismiss:hover {
    color: var(--os-text-primary);
}

.notice-link {
    display: inline-block;
    margin-top: var(--os-spacing-3);
    color: var(--os-text-primary);
    font-weight: 600;
    text-decoration: underline;
}

.notice-success {
    border-color: var(--os-success-outline);
    background: var(--os-success-background);
}

.notice-warn {
    border-color: var(--os-warn-outline);
    background: var(--os-warn-background);
}

.notice-error {
    border-color: var(--os-error-outline-secondary);
    background: var(--os-error-background);
}

/* ---- views ---- */

#view {
    padding: var(--os-spacing-10);
    overflow-y: auto;
}

.view {
    max-width: 34rem;
}

.group + .group {
    margin-top: var(--os-spacing-14);
    padding-top: var(--os-spacing-14);

    border-top: 1px solid var(--os-outline-tertiary);
}

.group-title {
    margin: 0 0 var(--os-spacing-7);
    font-size: 13px;
    font-weight: 600;
    color: var(--os-text-primary);
}

.prose + .form,
.prose + .facts,
.prose + .actions,
.facts + .actions,
.form + .prose {
    margin-top: var(--os-spacing-10);
}

.prose {
    color: var(--os-text-quaternary);
    font-size: 13px;
}

.prose p {
    margin: 0 0 var(--os-spacing-5);
}

.prose p:last-child {
    margin-bottom: 0;
}

.steps {
    margin: 0 0 var(--os-spacing-10);
    padding-left: 1.25rem;
    color: var(--os-text-quaternary);
    font-size: 13px;
}

.muted {
    margin: 0;
    color: var(--os-text-secondary);
    font-size: 12px;
}

/* ---- cards (login, two-factor, signed-in) ---- */

.card {
    padding: var(--os-spacing-7) 0;
}

.card + .muted {
    margin-top: var(--os-spacing-14);
}

.card-head {
    margin-bottom: 18px;
}

.card-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.25;
    color: var(--os-text-primary);
}

.card-subtitle {
    margin: var(--os-spacing-5) 0 0;
    font-size: 12px;
    line-height: 1.45;
    color: var(--os-text-secondary);
}

.card .form {
    gap: var(--os-spacing-10);
}

.card .field {
    grid-template-columns: 5.5rem 1fr;
    align-items: center;
    gap: var(--os-spacing-7);
}

.card .field > label {
    font-weight: 600;
    color: var(--os-text-quaternary);
}

.card .actions {
    justify-content: flex-end;
    margin-top: var(--os-spacing-10);
}

.card .btn {
    font-weight: 600;
}

.card .btn:not(.btn-primary) {
    border-color: transparent;
    background: var(--os-fill-quinary);
}

.card .btn:not(.btn-primary):hover:not(:disabled) {
    background: var(--os-hover-secondary);
}

/* MFA code entry: one wide centred box, as in the desktop addins */
.code-entry {
    display: grid;
    justify-items: center;
    gap: var(--os-spacing-7);
    width: min(100%, 15rem);
    margin: 0 auto;
}

.code-entry > label {
    font-size: 12px;
    font-weight: 600;
    color: var(--os-text-quaternary);
}

.card .control-code {
    height: 44px;
    border-color: var(--os-outline-secondary--static);
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.35em;
    text-align: center;
}

.control-code::placeholder {
    font-size: 13px;
    font-weight: 400;
    letter-spacing: normal;
}

.code-hint {
    margin: 0;
    font-size: 11px;
    color: var(--os-text-secondary);
}

.account-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--os-spacing-5);
    margin-top: var(--os-spacing-7);
    font-size: 12px;
}

.account-links a {
    color: var(--os-text-primary);
    text-decoration: underline;
}

.account-links + .muted {
    margin-top: var(--os-spacing-5);
}

/* ---- forms ---- */

.form {
    display: grid;
    gap: var(--os-spacing-7);
}

.field {
    display: grid;
    gap: var(--os-spacing-3);
    min-width: 0;
}

.field > label {
    font-size: 12px;
    color: var(--os-text-secondary);
}

.control {
    width: 100%;
    min-width: 0;
    height: var(--panel-control-height);
    padding: 0 var(--os-spacing-7);
    border: 1px solid var(--os-outline-quaternary);
    border-radius: var(--os-radius-sm);
    background: var(--os-background-primary);
    color: var(--os-text-primary);
    font: inherit;
    font-size: 13px;
}

.control:focus {
    border-color: var(--os-focus);
    box-shadow: inset 0 0 0 1px var(--os-focus);
    outline: none;
}

.control:disabled {
    background: var(--os-fill-quinary);
    color: var(--os-text-secondary);
}

select.control {
    padding-right: var(--os-spacing-3);
    cursor: pointer;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--os-spacing-7);
}

.btn {
    min-height: var(--panel-control-height);
    min-width: 6.5rem;
    padding: 0 var(--os-spacing-14);
    border: 1px solid var(--os-outline-secondary--static);
    border-radius: var(--os-radius-sm);
    background: var(--os-background-primary);
    color: var(--os-text-primary);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
}

.btn:hover:not(:disabled) {
    background: var(--os-hover-secondary);
}

.btn:disabled {
    border-color: var(--os-outline-quaternary);
    background: var(--os-fill-quinary);
    color: var(--os-text-tertiary--static);
    cursor: not-allowed;
}

.btn-primary {
    border-color: transparent;
    background: var(--if-accent);
    color: var(--if-accent-text);
    font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
    background: var(--if-accent-hover);
}

.btn-primary:active:not(:disabled) {
    background: var(--if-accent-pressed);
}

.btn-primary:disabled {
    border-color: transparent;
    background: var(--if-accent-disabled);
    color: var(--if-accent-text);
}

/* ---- busy state ---- */
.btn[aria-busy='true'] {
    position: relative;
    color: transparent;
}

.btn[aria-busy='true']::after {
    content: '';
    position: absolute;
    inset: 50% auto auto 50%;
    width: 12px;
    height: 12px;
    margin: -6px 0 0 -6px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    color: var(--os-text-primary);
    animation: spin 0.7s linear infinite;
}

.btn-primary[aria-busy='true']::after {
    color: var(--if-accent-text);
}

.btn-primary[aria-busy='true']:disabled {
    background: var(--if-accent);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
    .btn[aria-busy='true']::after {
        animation-duration: 2.5s;
    }
}

/* ---- fact lists ---- */

.facts {
    display: grid;
    grid-template-columns: minmax(5.5rem, auto) 1fr;
    gap: var(--os-spacing-3) var(--os-spacing-10);
    margin: 0;
    font-size: 12px;
}

.facts dt {
    color: var(--os-text-secondary);
}

.facts dd {
    margin: 0;
    min-width: 0;
    color: var(--os-text-quaternary);
    font-family: var(--panel-font-mono);
    overflow-wrap: anywhere;
}

/* ---- pull page: project browser ---- */

.pull {
    display: grid;
    gap: var(--os-spacing-10);
}

.pull > * {
    min-width: 0;
}

.toolbar {
    display: grid;
    gap: var(--os-spacing-5);
}

.toolbar-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--os-spacing-5);
}

.toolbar-row select.control {
    font-size: 12px;
}

.project-list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-bottom: 1px solid var(--os-outline-tertiary);
    transition: opacity 0.15s;
}

.project-list[aria-busy='true'] {
    opacity: 0.55;
    pointer-events: none;
}

.project {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: var(--os-spacing-10);
    row-gap: 1px;
    padding: var(--os-spacing-5) var(--os-spacing-7);
    border-top: 1px solid var(--os-outline-tertiary);
    cursor: pointer;
    user-select: none;
}

.project:first-child {
    border-top: 0;
}

.project:hover {
    background: var(--os-hover-secondary);
}

.project[aria-selected='true'] {
    background: color-mix(in srgb, var(--os-focus) 14%, var(--os-background-primary));
}

.project-list:focus-visible {
    outline-offset: 0;
}

.project-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.project-meta {
    grid-column: 1 / -1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11px;
    color: var(--os-text-secondary);
}

.status {
    display: inline-flex;
    align-items: center;
    gap: var(--os-spacing-4);
    font-size: 11px;
    color: var(--os-text-secondary);
    white-space: nowrap;
}

.status::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--os-text-tertiary--static);
}

.status-success::before {
    background: var(--os-success);
}

.status-error::before {
    background: var(--os-error);
}

.status-busy::before {
    background: var(--os-focus);
    animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
    50% { opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
    .status-busy::before {
        animation: none;
    }
}

.project-list-message {
    display: grid;
    justify-items: center;
    gap: var(--os-spacing-7);
    padding: var(--os-spacing-14) var(--os-spacing-10);
    text-align: center;
}

.pager {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--os-spacing-7);
}

.pager-range {
    font-size: 12px;
    color: var(--os-text-secondary);
}

.pager[aria-busy='true'] {
    opacity: 0.55;
    pointer-events: none;
}

.pager-pages {
    display: flex;
    align-items: center;
    gap: 2px;
}

.pager-btn {
    min-width: 26px;
    min-height: 26px;
    padding: 0 var(--os-spacing-4);
    border-color: transparent;
    font-size: 12px;
    line-height: 1;
}

.pager-btn:disabled {
    border-color: transparent;
    background: transparent;
}

.pager-current {
    border-color: var(--os-outline-secondary--static);
    background: var(--os-background-secondary);
    font-weight: 600;
}

.pager-gap {
    min-width: 14px;
    text-align: center;
    font-size: 12px;
    color: var(--os-text-tertiary--static);
}

.pull .group {
    margin-top: var(--os-spacing-5);
    padding-top: var(--os-spacing-14);
    border-top: 1px solid var(--os-outline-tertiary);
}

.project-browser {
    display: grid;
    gap: var(--os-spacing-10);
    min-width: 0;
}