/*
 * /join-only polish.
 *
 * The shared stylesheet is generated by Tailwind and covers the layout. This
 * file adds the three things that are specific to the early-access form:
 *   - a light-mode panel that stays readable over the dark hero photograph;
 *   - field error marks and the server's precise messages;
 *   - a centred in-flight overlay instead of a spinner under the button.
 *
 * It is linked only on /join, after home.css, so its `[data-theme="light"]`
 * rules win without touching the site-wide token contract.
 */

:root {
    --join-error: var(--color-error);
}

[data-theme="light"] {
    /* The dark-theme error red is too pale on a white panel. */
    --join-error: #b42318;
}

/* ------------------------------------------------------------- light contrast */

[data-theme="light"] .join-panel {
    /* Almost opaque: the glass still reads as glass, but the dark photo no
       longer bleeds through far enough to hurt the ink contrast. */
    background-color: color-mix(in oklab, var(--color-surface-bright) 94%, transparent);
    border-color: color-mix(in oklab, var(--color-on-surface) 14%, transparent);
    box-shadow: 0 24px 48px -24px rgb(15 23 42 / 0.3),
    0 2px 8px -2px rgb(15 23 42 / 0.1);
}

[data-theme="light"] .join-label {
    color: color-mix(in oklab, var(--color-on-surface) 78%, transparent);
}

[data-theme="light"] .join-field {
    background-color: #ffffff;
    border-color: color-mix(in oklab, var(--color-on-surface) 18%, transparent);
}

[data-theme="light"] .join-field:hover {
    border-color: color-mix(in oklab, var(--color-on-surface) 28%, transparent);
}

[data-theme="light"] .join-field::placeholder {
    color: color-mix(in oklab, var(--color-on-surface-variant) 62%, transparent);
}

[data-theme="light"] .join-role-option {
    background-color: #ffffff;
    border-color: color-mix(in oklab, var(--color-on-surface) 18%, transparent);
}

[data-theme="light"] .join-role-option:has(:checked) {
    background-color: color-mix(in oklab, var(--color-primary) 10%, transparent);
    border-color: var(--color-primary);
    color: var(--color-on-surface);
}

/* ------------------------------------------------------------------- fields */

.join-field {
    transition: border-color 150ms ease,
    box-shadow 150ms ease,
    background-color 150ms ease;
}

.join-field:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 24%, transparent);
}

.join-field[aria-invalid="true"] {
    border-color: var(--join-error);
    background-color: color-mix(in oklab, var(--join-error) 6%, var(--color-surface-container));
}

.join-field[aria-invalid="true"]:focus-visible {
    border-color: var(--join-error);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--join-error) 26%, transparent);
}

/* The radio group is the "field" here, so mark every option instead. */
.join-role-group[aria-invalid="true"] .join-role-option {
    border-color: color-mix(in oklab, var(--join-error) 52%, transparent);
    background-color: color-mix(in oklab, var(--join-error) 6%, transparent);
}

.join-error {
    margin-top: 0.45rem;
    color: var(--join-error);
    font-size: 0.75rem;
    line-height: 1.45;
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: 0.4rem;
}

.join-error::before {
    content: "";
    flex: none;
    width: 0.3rem;
    height: 0.3rem;
    margin-top: 0.4rem;
    border-radius: 9999px;
    background: currentColor;
}

.join-alert {
    margin-bottom: 0.25rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid color-mix(in oklab, var(--join-error) 38%, transparent);
    background-color: color-mix(in oklab, var(--join-error) 9%, transparent);
    color: var(--join-error);
    font-size: 0.875rem;
    line-height: 1.45;
}

/* ------------------------------------------------------------------- loader */

.join-form {
    position: relative;
}

.join-loader {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    background-color: color-mix(in oklab, var(--color-surface-bright) 72%, transparent);
    backdrop-filter: blur(6px);
    pointer-events: none;
    text-align: center;
    /* Hidden from first paint, not just after htmx's injected styles land. */
    opacity: 0;
    visibility: hidden;
    transition: opacity 180ms ease, visibility 180ms ease;
}

[data-theme="light"] .join-loader {
    background-color: color-mix(in oklab, var(--color-surface-bright) 82%, transparent);
}

.join-loader.htmx-request,
.htmx-request .join-loader {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.join-spinner {
    width: 2rem;
    height: 2rem;
    border-radius: 9999px;
    border: 2px solid color-mix(in oklab, var(--color-primary) 28%, transparent);
    border-top-color: var(--color-primary);
    animation: join-spin 0.7s linear infinite;
}

.join-loader-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-on-surface-variant);
}

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

@media (prefers-reduced-motion: reduce) {
    .join-spinner {
        animation-duration: 1.6s;
    }
}