/* ========== SIGNIN PAGE ========== */

.signin-page {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 60vh;
    padding: 1rem;
}

.signin-container {
    width: 100%;
    max-width: 420px;
}

.signin-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: 0 20px 45px rgba(31, 42, 48, 0.08);
}

.signin-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.signin-header h1 {
    font-size: 1.6rem;
    margin-bottom: 0.35rem;
}

.signin-header p {
    color: var(--muted);
    margin: 0;
}

.signin-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background: rgb(from var(--mud-palette-primary) r g b / 0.06);
    padding: 0.25rem;
    border-radius: 0.75rem;
}

.signin-tab {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    border-radius: 0.5rem;
    font-weight: 500;
    color: var(--muted);
    cursor: pointer;
    transition: all 150ms ease;
}

.signin-tab.active {
    background: var(--surface);
    color: var(--accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.signin-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ink);
}

.form-group input {
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    font-size: 1rem;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgb(from var(--mud-palette-primary) r g b / 0.1);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--muted);
}

.signin-error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: rgba(185, 52, 52, 0.1);
    border: 1px solid rgba(185, 52, 52, 0.2);
    border-radius: 0.6rem;
    color: #b03434;
    font-size: 0.85rem;
}

.btn-full {
    width: 100%;
}

.btn-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 0.5rem;
}

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

.signin-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.signin-divider::before,
.signin-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--line);
}

.guest-btn {
    background: rgb(from var(--mud-palette-primary) r g b / 0.08);
    border: 1px solid rgb(from var(--mud-palette-primary) r g b / 0.2);
    color: var(--accent-strong);
}

.guest-btn:hover:not(:disabled) {
    background: rgb(from var(--mud-palette-primary) r g b / 0.12);
}

.guest-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.75rem;
}

.signin-success {
    text-align: center;
}

.signin-success-icon {
    color: var(--accent);
    margin-bottom: 1rem;
}

/* Renders as an h1 so FocusOnNavigate has a target in the signed-in state, but keeps the
   size the h2 had (browser default 1.5em) rather than the global h1 clamp. */
.signin-success h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.signin-success p {
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.signin-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}