html.auth-page {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

.auth-body {
    min-height: 100vh;
    min-height: 100dvh;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.12), transparent),
        var(--bg-app);
    padding:
        max(1.5rem, env(safe-area-inset-top))
        max(1.5rem, env(safe-area-inset-right))
        max(1.5rem, env(safe-area-inset-bottom))
        max(1.5rem, env(safe-area-inset-left));
    position: relative;
    overscroll-behavior-x: none;
    box-sizing: border-box;
}

.auth-shell {
    width: 100%;
    max-width: min(420px, 100%);
    margin-inline: auto;
    flex: 0 1 auto;
    min-width: 0;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-x: hidden;
    box-sizing: border-box;
}

.auth-theme-toggle {
    position: fixed;
    top: max(1rem, env(safe-area-inset-top));
    right: max(1rem, env(safe-area-inset-right));
    z-index: 10;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem;
    padding: 0.25rem;
    margin-bottom: 1.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
}

.auth-tab {
    display: block;
    text-align: center;
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.auth-tab:hover {
    color: var(--text);
}

.auth-tab--active {
    background: var(--bg-card);
    color: var(--text);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.auth-panel--hidden {
    display: none;
}

.auth-panel h1 {
    margin: 0 0 0.25rem;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.0625rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1.75rem;
    text-decoration: none;
}

.auth-logo:hover {
    opacity: 0.9;
}

.auth-help {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.auth-subtitle {
    color: var(--text-muted);
    margin: 0 0 1.5rem;
    font-size: 0.875rem;
}

.auth-form,
.auth-form .form-group {
    min-width: 0;
    max-width: 100%;
}

.auth-form .form-group { margin-bottom: 1rem; }

.auth-form label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text);
}

.auth-form input,
.auth-form select,
.auth-form textarea,
.auth-form .form-control {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    background: var(--bg-elevated);
    color: var(--text);
    font-family: inherit;
    box-sizing: border-box;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.auth-form input:focus,
.auth-form select:focus,
.auth-form textarea:focus {
    outline: none;
    border-color: rgba(139, 92, 246, 0.45);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
}

.auth-btn {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.65rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
    color: var(--text-dim);
    font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    transition: background var(--transition-fast), transform var(--duration-press) var(--ease-out);
}

.btn-google:hover { background: var(--bg-card); }
.btn-google:active { transform: scale(0.98); }

.auth-footer {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.auth-error {
    color: var(--expense);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
}

.auth-success {
    color: var(--income);
    font-size: 0.8125rem;
    margin: 0 0 1rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-sm);
    background: rgba(74, 222, 128, 0.1);
}

.auth-panel h1,
.auth-logo {
    color: var(--text);
    font-weight: var(--font-weight-heading);
}

.auth-form label {
    color: var(--text);
    font-weight: var(--font-weight-label);
}

[data-theme="light"] .auth-body {
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.08), transparent),
        var(--bg-app);
}

@media (max-width: 480px) {
    .auth-body {
        align-items: center;
        padding:
            max(1rem, env(safe-area-inset-top))
            max(1rem, env(safe-area-inset-right))
            max(1rem, env(safe-area-inset-bottom))
            max(1rem, env(safe-area-inset-left));
    }

    .auth-shell {
        width: 100%;
        max-width: 100%;
    }

    .auth-card {
        padding: 1.25rem 1rem;
        border-radius: calc(var(--radius) - 2px);
    }

    .auth-logo {
        margin-bottom: 1.25rem;
    }

    .auth-panel h1 {
        font-size: 1.375rem;
    }

    .auth-tabs {
        margin-bottom: 1.25rem;
    }

    .auth-form input,
    .auth-form select,
    .auth-form textarea,
    .auth-form .form-control {
        font-size: 16px;
    }

    .auth-btn {
        min-height: 44px;
    }
}