/* ── page wrapper ── */
    .vs-profile {
      max-width: 640px;
      margin: 0 auto;
      padding: 40px 20px 64px;
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      gap: 0;
    }

    /* ── page header ── */
    .vs-profile-header {
      margin-bottom: 32px;
    }
    .vs-profile-header h2 {
      font-family: 'Syne', sans-serif;
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -.025em;
      color: var(--stt_text);
      margin-bottom: 6px;
    }
    .vs-profile-header p {
      font-family: 'DM Mono', monospace;
      font-size: .72rem;
      color: var(--stt_muted);
      line-height: 1.5;
    }

    /* ── group label ── */
    .u_group-label {
      font-family: 'DM Mono', monospace;
      font-size: .67rem;
      letter-spacing: .1em;
      text-transform: uppercase;
      color: var(--stt_muted);
      padding-left: 2px;
      margin-bottom: 10px;
      margin-top: 28px;
    }
    .u_group-label:first-of-type { margin-top: 0; }

    /* ── card ── */
    .u_card {
      background: var(--surface);
      border: 1px solid var(--stt_border);
      border-radius: 18px;
      overflow: hidden;
      margin-bottom: 10px;
      position: relative;
      transition: border-color .2s;
    }

    /* top accent line */
    .u_card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
    }
    .u_card::before {
      background: linear-gradient(90deg, transparent, var(--green), var(--cyan), transparent);
    }
    .u_card.warning-card::before {
      background: linear-gradient(90deg, transparent, var(--yellow), transparent);
    }
    .u_card.danger-card::before {
      background: linear-gradient(90deg, transparent, var(--warn), transparent);
    }

    /* card variants */
    .u_card.warning-card { border-color: rgba(247,201,72,.18); }
    .u_card.danger-card  { border-color: rgba(255,107,107,.18); }

    /* ── card header row (always visible) ── */
    .u_card-head {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 18px 22px;
    }

    /* icon ring */
    .u_card-icon {
      width: 38px; height: 38px;
      border-radius: 11px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .u_card-icon svg { width: 18px; height: 18px; fill: currentColor; }
    .u_card-icon--green  { background: rgba(79,255,176,.1);  border: 1px solid rgba(79,255,176,.2);  color: var(--green); }
    .u_card-icon--cyan   { background: rgba(0,201,255,.1);   border: 1px solid rgba(0,201,255,.2);   color: var(--cyan); }
    .u_card-icon--yellow { background: rgba(247,201,72,.1);  border: 1px solid rgba(247,201,72,.2);  color: var(--yellow); }
    .u_card-icon--warn   { background: rgba(255,107,107,.08);border: 1px solid rgba(255,107,107,.18);color: var(--warn); }

    /* card title + current value */
    .u_card-info { flex: 1; min-width: 0; }
    .u_card-info h3 {
      font-family: 'Syne', sans-serif;
      font-size: .9rem;
      font-weight: 700;
      color: var(--stt_text);
      margin: 0 0 3px;
    }
    .u_card-info .u_current-val {
      font-family: 'DM Mono', monospace;
      font-size: .74rem;
      color: var(--stt_muted);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .u_current-val.is-set   { color: var(--cyan); }
    .u_current-val.is-unset { color: var(--stt_muted); font-style: italic; }

    /* card body (danger cards — no form, just text + button) */
    .u_card-body {
      padding: 0 22px 20px;
    }
    .u_card-body p {
      font-family: 'DM Mono', monospace;
      font-size: .78rem;
      color: var(--stt_muted);
      line-height: 1.65;
      margin-bottom: 14px;
    }
    .u_card-body p strong { color: var(--stt_text); }
    .u_card-body p strong.u_danger { color: var(--warn); }

    /* ── pencil / edit button ── */
    .btn-icon,
    .u_settings_icon {
      width: 32px; height: 32px;
      border-radius: 9px;
      border: 1px solid var(--stt_border);
      background: var(--panel);
      display: flex; align-items: center; justify-content: center;
      cursor: pointer; flex-shrink: 0;
      font-size: .82rem; line-height: 1;
      transition: border-color .18s, background .18s, transform .13s;
      padding: 0; margin: 0;
    }
    .btn-icon:hover,
    .u_settings_icon:hover {
      border-color: var(--green);
      background: rgba(79,255,176,.08);
      transform: scale(1.08);
    }

    /* ── slide-down form container ── */
    #emailFormContainer,
    #pwFormContainer,
    #hintFormContainer {
      border-top: 1px solid var(--stt_border);
      padding: 20px 22px 22px;
      animation: uSlideDown .2s ease;
    }
    @keyframes uSlideDown {
      from { opacity: 0; transform: translateY(-5px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* ── error box (PHP session errors) ── */
    .error-box {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      background: rgba(255,107,107,.07);
      border: 1px solid rgba(255,107,107,.22);
      border-radius: 10px;
      padding: 11px 14px;
      margin-bottom: 16px;
      font-family: 'DM Mono', monospace;
      font-size: .76rem;
      color: var(--warn);
    }
    .error-box ul {
      list-style: none;
      margin: 0; padding: 0;
      display: flex; flex-direction: column; gap: 4px;
    }
    .error-box ul li::before { content: '⚠ '; }

    /* js inline error spans */
    #email_error,
    #hint_error,
    .error_msg {
      display: block;
      font-family: 'DM Mono', monospace;
      font-size: .72rem;
      color: var(--warn);
      margin-bottom: 10px;
      min-height: 0;
    }

    /* ── notice box ── */
    .u_notice {
      background: rgba(0,201,255,.05);
      border: 1px solid rgba(0,201,255,.13);
      border-radius: 8px;
      padding: 10px 13px;
      margin-bottom: 16px;
    }
    .u_notice small {
      font-family: 'DM Mono', monospace;
      font-size: .72rem;
      color: var(--stt_muted);
      line-height: 1.65;
    }
    .a-dot { color: var(--cyan); margin-right: 3px; }

    /* ── form fields ── */
    .u_field { margin-bottom: 14px; }
    .u_field:last-of-type { margin-bottom: 0; }

    .u_field label {
      display: block;
      font-family: 'DM Mono', monospace;
      font-size: .68rem;
      letter-spacing: .06em;
      text-transform: uppercase;
      color: var(--stt_muted);
      margin-bottom: 6px;
    }

    /* field row (label + input side by side) */
    .u_field-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .u_field-row label {
      font-family: 'DM Mono', monospace;
      font-size: .68rem;
      letter-spacing: .06em;
      text-transform: uppercase;
      color: var(--stt_muted);
      white-space: nowrap;
      flex: 1;
    }
    .u_field-row input { flex: 4; }

    /* all text/email/password inputs */
    .u_card input[type="text"],
    .u_card input[type="email"],
    .u_card input[type="password"] {
      width: 100%;
      background: var(--panel);
      border: 1px solid var(--stt_border);
      border-radius: 10px;
      color: var(--stt_text);
      font-family: 'DM Mono', monospace;
      font-size: .84rem;
      padding: 10px 13px;
      outline: none;
      box-sizing: border-box;
      transition: border-color .22s, box-shadow .22s;
    }
    .u_card input[type="text"]:hover,
    .u_card input[type="email"]:hover,
    .u_card input[type="password"]:hover  { border-color: #3a4260; }
    .u_card input[type="text"]:focus,
    .u_card input[type="email"]:focus,
    .u_card input[type="password"]:focus  {
      border-color: var(--green);
      box-shadow: 0 0 0 3px rgba(79,255,176,.07);
    }
    .u_card input::placeholder { color: var(--stt_muted); }

    /* password wrapper */
    .password-wrapper {
      position: relative;
      display: flex;
      align-items: center;
    }
    .password-wrapper input {
      padding-right: 40px !important;
    }
    .eye-icon {
      position: absolute;
      right: 11px;
      cursor: pointer;
      user-select: none;
      font-size: .9rem;
      color: var(--stt_muted);
      transition: color .18s;
      line-height: 1;
    }
    .eye-icon:hover { color: var(--stt_text); }

    /* confirm email section */
    #confirm_section { margin-top: 14px; }

    /* ── buttons ── */
    .u_btn-row {
      display: flex;
      gap: 9px;
      margin-top: 18px;
      flex-wrap: wrap;
    }

    /* base button */
    .btn_change_info,
    .btn_update_password,
    .btn_update_hint,
    .btn-cancel,
    .btn-logout_all,
    .btn-delete-account {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      padding: 10px 20px;
      border-radius: 10px;
      font-family: 'Syne', sans-serif;
      font-size: .8rem;
      font-weight: 700;
      cursor: pointer;
      border: 1px solid;
      transition: background .18s, box-shadow .18s, transform .13s;
      text-decoration: none;
    }
    .btn_change_info:active,
    .btn_update_password:active,
    .btn_update_hint:active,
    .btn-cancel:active,
    .btn-logout_all:active,
    .btn-delete-account:active { transform: scale(.97); }

    /* save — green */
    .btn_change_info,
    .btn_update_password,
    .btn_update_hint {
      background: rgba(79,255,176,.1);
      border-color: rgba(79,255,176,.35);
      color: var(--green);
    }
    .btn_change_info:hover,
    .btn_update_password:hover,
    .btn_update_hint:hover {
      background: rgba(79,255,176,.18);
      box-shadow: 0 4px 16px rgba(79,255,176,.12);
      transform: translateY(-1px);
    }

    /* cancel — neutral */
    .btn-cancel {
      background: transparent;
      border-color: var(--stt_border);
      color: var(--stt_muted);
    }
    .btn-cancel:hover {
      border-color: #3a4260;
      color: var(--stt_text);
      background: var(--panel);
    }

    /* logout all — yellow */
    .btn-logout_all {
      background: rgba(247,201,72,.08);
      border-color: rgba(247,201,72,.35);
      color: var(--yellow);
    }
    .btn-logout_all:hover {
      background: rgba(247,201,72,.16);
      box-shadow: 0 4px 16px rgba(247,201,72,.1);
      transform: translateY(-1px);
    }

    /* delete — red */
    .btn-delete-account {
      background: rgba(255,107,107,.08);
      border-color: rgba(255,107,107,.35);
      color: var(--warn);
    }
    .btn-delete-account:hover {
      background: rgba(255,107,107,.16);
      box-shadow: 0 4px 16px rgba(255,107,107,.1);
      transform: translateY(-1px);
    }

    /* ── responsive ── */
    @media (max-width: 480px) {
      .vs-profile { padding: 22px 12px 48px; }
      .u_card-head { padding: 16px 16px; }
      #emailFormContainer,
      #pwFormContainer,
      #hintFormContainer { padding: 16px 16px 18px; }
      .u_card-body { padding: 0 16px 18px; }
      .u_field-row { flex-direction: column; align-items: flex-start; }
      .u_field-row input { width: 100%; }
      .btn_change_info,
      .btn_update_password,
      .btn_update_hint,
      .btn-cancel,
      .btn-logout_all,
      .btn-delete-account { width: 100%; }
    }