/* Centered authentication screen — gradient/mesh background, single card. */

.auth-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-5);
    background:
        radial-gradient(ellipse 80% 55% at 18% 12%, color-mix(in srgb, var(--color-primary) 16%, transparent), transparent 60%),
        radial-gradient(ellipse 60% 50% at 88% 92%, color-mix(in srgb, var(--color-primary) 12%, transparent), transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 110%, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent 60%),
        var(--color-bg);
}

.auth-screen__brand {
    color: var(--color-primary);
    height: 44px;
    margin-bottom: var(--space-6);
}
.auth-screen__brand svg { height: 100%; width: auto; }

.auth-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--elev-3);
    padding: var(--space-7);
    width: 100%;
    max-width: 420px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: var(--space-2);
}

.auth-card__subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-body);
    margin-bottom: var(--space-6);
}

.auth-notice {
    margin-bottom: var(--space-5);
    padding: var(--space-3) var(--space-4);
    background: color-mix(in srgb, var(--color-warning) 14%, var(--color-surface));
    border: 1px solid color-mix(in srgb, var(--color-warning) 40%, transparent);
    border-radius: var(--radius-card);
    color: var(--color-text);
    font-size: var(--text-body);
    text-align: center;
}

.auth-tabs {
    display: flex;
    background: var(--color-surface-2);
    border-radius: var(--radius-button);
    padding: 4px;
    margin-bottom: var(--space-5);
    gap: 2px;
}

.auth-tabs button {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    background: transparent;
    color: var(--color-text-muted);
    border: none;
    border-radius: calc(var(--radius-button) - 2px);
    font: inherit;
    font-size: var(--text-body);
    font-weight: var(--weight-medium);
    cursor: pointer;
    transition: background var(--motion-fast) var(--ease-standard),
                color var(--motion-fast) var(--ease-standard);
}
.auth-tabs button.is-active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--elev-1);
}

.auth-form { display: flex; flex-direction: column; gap: var(--space-4); }

.auth-footer {
    margin-top: var(--space-6);
    font-size: var(--text-caption);
    color: var(--color-text-muted);
    text-align: center;
}

/* Password strength meter */
.password-meter {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-caption);
}
.password-meter__bar {
    flex: 1;
    height: 4px;
    background: var(--color-surface-3);
    border-radius: var(--radius-pill);
    overflow: hidden;
}
.password-meter__fill {
    height: 100%;
    width: 0%;
    background: var(--color-text-muted);
    transition: width var(--motion-normal) var(--ease-standard),
                background var(--motion-fast) var(--ease-standard);
}
.password-meter[data-score='0'] .password-meter__fill { width: 10%;  background: var(--color-danger); }
.password-meter[data-score='1'] .password-meter__fill { width: 30%;  background: var(--color-danger); }
.password-meter[data-score='2'] .password-meter__fill { width: 55%;  background: var(--color-warning); }
.password-meter[data-score='3'] .password-meter__fill { width: 80%;  background: var(--color-success); }
.password-meter[data-score='4'] .password-meter__fill { width: 100%; background: var(--color-success); }