/*
 * "Sign in with OneVault" button, v1.
 * Specification: docs/integration/brand/SIGN-IN-BUTTON.md
 *
 * Markup:
 *   <a class="ovb" href="...">
 *     <img class="ovb__mark" src="/brand/sign-in/onevault-mark-silver.svg" alt="" width="20" height="20">
 *     <span class="ovb__label">Sign in with OneVault</span>
 *   </a>
 *
 * Modifiers: ovb--outline, ovb--compact, ovb--large, ovb--pill, ovb--on-dark, ovb--block.
 * Loading: add aria-busy="true" and replace the mark with <span class="ovb__spinner" aria-hidden="true"></span>.
 */
.ovb {
    --ovb-bg: #00392c;
    --ovb-fg: #f4f5f4;
    --ovb-border: #0b5b47;
    --ovb-bg-hover: #0b5b47;
    --ovb-bg-pressed: #002f24;
    --ovb-focus: #0b5b47;
    --ovb-height: 44px;
    --ovb-font-size: 15px;
    --ovb-mark: 20px;

    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 220px;
    height: var(--ovb-height);
    margin: 0;
    padding: 0 16px;
    border: 1px solid var(--ovb-border);
    border-radius: 10px;
    background: var(--ovb-bg);
    color: var(--ovb-fg);
    font-family: var(--ovb-font, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif);
    font-size: var(--ovb-font-size);
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: background-color .15s ease, border-color .15s ease;
}

.ovb:hover { background: var(--ovb-bg-hover); color: var(--ovb-fg); text-decoration: none; }
.ovb:active { background: var(--ovb-bg-pressed); }

.ovb:focus { outline: none; }
.ovb:focus-visible {
    outline: 3px solid var(--ovb-focus);
    outline-offset: 2px;
}

.ovb__mark,
.ovb__spinner {
    display: block;
    flex: 0 0 var(--ovb-mark);
    width: var(--ovb-mark);
    height: var(--ovb-mark);
}

.ovb__label { display: block; overflow: hidden; text-overflow: ellipsis; }

.ovb__spinner {
    box-sizing: border-box;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: ovb-spin .8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
    .ovb { transition: none; }
    .ovb__spinner { animation-duration: 2.4s; }
}

/* Outline variant: for interfaces that are already green-heavy. */
.ovb--outline {
    --ovb-bg: #ffffff;
    --ovb-fg: #00392c;
    --ovb-border: #00392c;
    --ovb-bg-hover: #f4f5f4;
    --ovb-bg-pressed: #d7dcda;
}

/* Placed on a dark surface: silver keyline border and a silver focus ring. */
.ovb--on-dark { --ovb-focus: #d7dcda; }
.ovb--on-dark:not(.ovb--outline) { --ovb-border: #aeb7b3; }

.ovb--compact { --ovb-height: 40px; }
.ovb--large { --ovb-height: 52px; --ovb-font-size: 16px; --ovb-mark: 24px; padding: 0 20px; gap: 12px; }
.ovb--pill { border-radius: 999px; }
.ovb--block { display: flex; width: 100%; }

.ovb:disabled,
.ovb[aria-disabled="true"],
.ovb[aria-busy="true"] { cursor: default; }

.ovb:disabled,
.ovb[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }

a.ovb[aria-disabled="true"],
.ovb[aria-busy="true"] { pointer-events: none; }

.ovb:disabled:hover,
.ovb:disabled:active,
.ovb[aria-disabled="true"]:hover,
.ovb[aria-disabled="true"]:active,
.ovb[aria-busy="true"]:hover,
.ovb[aria-busy="true"]:active { background: var(--ovb-bg); }

@media (forced-colors: active) {
    .ovb { border-color: ButtonText; }
    .ovb:focus-visible { outline-color: Highlight; }
}