/* ==========================================================================
   XÁC THỰC — thanh tài khoản trên navbar & hộp thoại đăng nhập
   Dùng lại token màu/khoảng cách khai báo trong style.css
   ========================================================================== */

/* --- Thanh tài khoản ---------------------------------------------------- */

.navbar-auth {
  display: flex;
  align-items: center;
  margin-left: 12px;
}

.btn-auth {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-white);
  background: var(--color-primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.btn-auth:hover {
  background: var(--color-secondary);
  box-shadow: var(--glow-cyan);
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 6px 5px 12px;
  background: var(--bg-surface-solid);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

.auth-user-name {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  max-width: 160px;
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-user-name .fa-user-shield { color: var(--color-purple); }
.auth-user-name .fa-user { color: var(--color-primary); }

.btn-auth-logout {
  padding: 6px 9px;
  color: var(--text-muted);
  background: transparent;
}

.btn-auth-logout:hover {
  color: var(--text-white);
  background: var(--color-danger);
  box-shadow: none;
}

/* --- Hộp thoại ---------------------------------------------------------- */

.auth-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
}

.auth-modal-overlay.active { display: flex; }

.auth-modal {
  width: 100%;
  max-width: 420px;
  background: var(--bg-surface-solid);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--glass-shadow), 0 20px 50px rgba(15, 23, 42, 0.18);
  animation: auth-modal-in 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes auth-modal-in {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-color);
}

.auth-modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.auth-modal-close {
  padding: 6px 10px;
  font-size: 16px;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.auth-modal-close:hover {
  color: var(--color-danger);
  background: rgba(239, 68, 68, 0.08);
}

.auth-modal-body { padding: 22px; }

/* --- Biểu mẫu ----------------------------------------------------------- */

.auth-label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.auth-optional {
  font-weight: 400;
  color: var(--text-muted);
}

.auth-input {
  width: 100%;
  margin-bottom: 16px;
  padding: 11px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-main);
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  outline: none;
  transition: var(--transition-smooth);
}

.auth-input:focus {
  background: var(--bg-surface-solid);
  border-color: var(--border-color-focus);
  box-shadow: var(--glow-cyan);
}

.auth-error {
  min-height: 18px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-danger);
}

.btn-auth-submit {
  width: 100%;
  padding: 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  background: var(--color-primary);
  border: none;
  border-radius: 9px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-auth-submit:hover:not(:disabled) {
  background: var(--color-secondary);
  box-shadow: var(--glow-cyan);
}

.btn-auth-submit:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.auth-switch {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.auth-switch-btn {
  padding: 0 2px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  background: none;
  border: none;
  cursor: pointer;
}

.auth-switch-btn:hover { text-decoration: underline; }

/* --- Màn hình nhỏ ------------------------------------------------------- */

@media (max-width: 768px) {
  .navbar-auth { margin-left: 8px; }
  .btn-auth span { display: none; }
  .auth-user-name { max-width: 90px; }
  .auth-modal { max-width: 100%; }
}