/* =========================================================
   Thiên Ân – Auth pages (login / register)
   Tận dụng design tokens & .btn từ main.css
   ========================================================= */

.auth-body {
    min-height: 100vh;
    background:
        linear-gradient(135deg, rgba(201, 168, 76, 0.05) 0%, rgba(255, 255, 255, 1) 60%),
        var(--gray-50);
    display: flex;
    flex-direction: column;
}

.auth-header-spacer {
    display: block;
    min-width: 0;
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-card);
    padding: 40px 36px;
    box-shadow: 0 16px 40px rgba(17, 17, 17, 0.08);
}

.auth-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin: 0 0 6px;
    position: relative;
    padding-bottom: 12px;
}

.auth-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 48px;
    height: 3px;
    background: var(--gold);
    border-radius: 2px;
}

.auth-subtitle {
    color: var(--gray);
    font-size: 0.94rem;
    margin: 0 0 28px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* ===== Form group ===== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--black);
    letter-spacing: 0.2px;
}

.form-group .optional-tag {
    color: var(--gray);
    font-weight: 400;
    font-size: 0.8rem;
    margin-left: 4px;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-input);
    background: var(--white);
    color: var(--black);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.form-group input::placeholder {
    color: var(--gray-300);
}

.form-group input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.18);
}

.error-message {
    color: #d32f2f;
    font-size: 0.8rem;
    min-height: 1em;
}

.password-hint {
    font-size: 0.78rem;
    color: var(--gray);
    min-height: 1em;
}

.password-hint--yếu          { color: #d32f2f; }
.password-hint--trung-bình   { color: #d97706; }
.password-hint--khỏe         { color: #16a34a; }
.password-hint--rất-khỏe     { color: #15803d; font-weight: 600; }

/* ===== Form-level message ===== */
.form-message {
    font-size: 0.9rem;
    padding: 0;
    min-height: 1em;
}

.form-message--error {
    color: #b91c1c;
    background: #fef2f2;
    border: 1px solid #fecaca;
    padding: 10px 14px;
    border-radius: var(--radius-input);
}

.form-message--success {
    color: #15803d;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 10px 14px;
    border-radius: var(--radius-input);
}

/* ===== Submit button ===== */
.btn-block {
    width: 100%;
    padding: 13px 22px;
    font-size: 1rem;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== Switch link ===== */
.auth-switch {
    margin: 22px 0 0;
    text-align: center;
    color: var(--gray);
    font-size: 0.92rem;
}

.auth-switch a {
    color: var(--gold);
    font-weight: 600;
    margin-left: 4px;
}

.auth-switch a:hover {
    color: var(--gold-dark);
    text-decoration: underline;
}

/* ===== Google auth divider ===== */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 4px 0;
    color: var(--gray-300);
    font-size: 0.82rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

.auth-divider span {
    color: var(--gray);
    white-space: nowrap;
}

/* ===== Google button wrapper ===== */
.google-btn-wrapper {
    display: flex;
    justify-content: center;
}

/* GSI injects an iframe – đảm bảo nó không bị cắt */
.google-btn-wrapper iframe {
    border-radius: var(--radius-btn) !important;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .auth-card {
        padding: 28px 22px;
    }
    .auth-title { font-size: 1.7rem; }
}

/* ===== Dark mode ===== */
:root[data-theme='dark'] .auth-body,
.dark .auth-body {
    background:
        linear-gradient(135deg, rgba(212, 160, 23, 0.07) 0%, var(--color-bg) 55%),
        var(--color-bg);
}

:root[data-theme='dark'] .auth-card,
.dark .auth-card {
    background: var(--color-bg-card);
    border-color: var(--color-border);
    box-shadow: var(--shadow-lg);
}

:root[data-theme='dark'] .auth-title,
.dark .auth-title {
    color: var(--color-text);
}

:root[data-theme='dark'] .auth-subtitle,
.dark .auth-subtitle {
    color: var(--color-text-muted);
}

:root[data-theme='dark'] .form-group label,
.dark .form-group label {
    color: var(--color-text);
}

:root[data-theme='dark'] .form-group input,
.dark .form-group input {
    background: var(--color-bg);
    border-color: var(--color-border);
    color: var(--color-text);
}

:root[data-theme='dark'] .form-group input::placeholder,
.dark .form-group input::placeholder {
    color: var(--color-text-muted);
}

:root[data-theme='dark'] .form-group input:focus,
.dark .form-group input:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 160, 23, 0.22);
}

:root[data-theme='dark'] .auth-switch,
.dark .auth-switch {
    color: var(--color-text-muted);
}

:root[data-theme='dark'] .auth-divider::before,
:root[data-theme='dark'] .auth-divider::after,
.dark .auth-divider::before,
.dark .auth-divider::after {
    background: var(--color-border);
}

:root[data-theme='dark'] .form-message--error,
.dark .form-message--error {
    color: #fca5a5;
    background: rgba(185, 28, 28, 0.15);
    border-color: rgba(248, 113, 113, 0.35);
}

:root[data-theme='dark'] .form-message--success,
.dark .form-message--success {
    color: #86efac;
    background: rgba(22, 163, 74, 0.15);
    border-color: rgba(74, 222, 128, 0.35);
}

:root[data-theme='dark'] .form-group input:-webkit-autofill,
:root[data-theme='dark'] .form-group input:-webkit-autofill:hover,
:root[data-theme='dark'] .form-group input:-webkit-autofill:focus,
.dark .form-group input:-webkit-autofill,
.dark .form-group input:-webkit-autofill:hover,
.dark .form-group input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px var(--color-bg) inset;
    -webkit-text-fill-color: var(--color-text);
    caret-color: var(--color-text);
    transition: background-color 9999s ease-out 0s;
}