.account-messenger-button {
  position: fixed;
  right: 18px;
  bottom: 142px;
  z-index: 1200;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid rgba(30, 64, 175, .18);
  border-radius: 999px;
  color: #12326b;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 10px 30px rgba(15, 42, 84, .14);
  font: 700 13px/1 "Pretendard", "Noto Sans KR", sans-serif;
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.account-messenger-dialog {
  box-sizing: border-box;
  width: min(720px, calc(100vw - 28px));
  height: min(760px, calc(100dvh - 28px));
  max-height: min(820px, calc(100dvh - 28px));
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 24px;
  color: #102344;
  background: #f7faff;
  box-shadow: 0 28px 90px rgba(6, 25, 58, .3);
}

.account-messenger-dialog[open] {
  display: flex;
  flex-direction: column;
}

.account-messenger-dialog::backdrop {
  background: rgba(5, 17, 39, .56);
  backdrop-filter: blur(5px);
}

.account-messenger-dialog > header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 26px 18px;
  color: white;
  background: radial-gradient(circle at 82% 10%, rgba(89, 171, 255, .45), transparent 35%), linear-gradient(135deg, #0c2b64, #1769df);
}

.account-messenger-dialog > header > div {
  min-width: 0;
}

.account-messenger-dialog header small {
  display: block;
  line-height: 1.35;
  letter-spacing: .13em;
  opacity: .75;
  overflow-wrap: anywhere;
}

.account-messenger-dialog h2,
.account-messenger-dialog h3,
.account-messenger-dialog p { margin: 0; }
.account-messenger-dialog h2 { margin-top: 5px; font-size: clamp(20px, 4vw, 28px); }
.account-messenger-dialog h3 { margin: 18px 0 10px; font-size: 15px; }

.account-messenger-dialog header button {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  color: white;
  background: rgba(255, 255, 255, .15);
  font-size: 26px;
}

.account-messenger-dialog > p,
.account-messenger-dialog > form,
.account-messenger-dialog > .account-provider-note { margin: 18px 26px 0; }

.account-auth-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin: 16px 26px 0;
  padding: 5px;
  border: 1px solid #dce6f4;
  border-radius: 14px;
  background: #edf4fd;
}

.account-auth-tabs button { min-width: 0; border-color: transparent; background: transparent; font-size: 12px; }
.account-auth-tabs button.active { color: white; border-color: #1769df; background: #1769df; box-shadow: 0 5px 14px rgba(23, 105, 223, .2); }
.account-auth-help,
.account-messenger-dialog label small { color: #718198; font-size: 11px; font-weight: 500; line-height: 1.5; }
.account-registration-summary {
  display: grid;
  gap: 4px;
  margin: 16px 26px 0;
  padding: 14px 16px;
  border: 1px solid #b8d9cc;
  border-radius: 14px;
  color: #0d5549;
  background: #edfaf5;
}
.account-registration-summary span { color: #5f756f; font-size: 12px; }

.account-messenger-dialog > nav {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  min-height: 53px;
  border-bottom: 1px solid #dbe5f4;
  background: white;
}

.account-messenger-dialog > nav button {
  min-height: 50px;
  border: 0;
  border-bottom: 3px solid transparent;
  color: #687791;
  background: transparent;
  font-weight: 700;
}

.account-messenger-dialog > nav button.active { color: #145fd2; border-bottom-color: #2879ef; }
.account-messenger-dialog > main {
  position: relative;
  z-index: auto;
  display: block;
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
  max-height: none;
  margin: 0;
  padding: 18px 22px 28px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.account-messenger-dialog > main.account-auth-main { display: grid; gap: 16px; max-height: min(650px, calc(100dvh - 120px)); padding: 20px 26px 28px; }
.account-messenger-dialog > main.account-auth-main {
  flex: 1 1 auto;
  min-height: 0;
  max-height: none;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.account-auth-main > p,
.account-auth-main > form,
.account-auth-main > .account-auth-tabs,
.account-auth-main > .account-registration-summary { margin: 0; }
.account-auth-main > .account-registration-steps { margin: 0; }
.account-auth-main > .account-status { margin: 0 -26px; }
.account-auth-main > .account-provider-note { padding-bottom: 0; }

.account-messenger-dialog form {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid #dce6f4;
  border-radius: 16px;
  background: white;
}

.account-messenger-dialog label { display: grid; gap: 7px; color: #465875; font-size: 13px; font-weight: 700; }
.account-messenger-dialog input {
  min-width: 0;
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid #cfdced;
  border-radius: 11px;
  color: #102344;
  background: #fbfdff;
  font: inherit;
}

.account-messenger-dialog button {
  min-height: 40px;
  padding: 0 13px;
  border: 1px solid #bdd0ea;
  border-radius: 11px;
  color: #174986;
  background: #eef5ff;
  font-weight: 750;
  cursor: pointer;
}

.account-messenger-dialog form > button { color: white; border-color: #1769df; background: #1769df; }
.account-messenger-dialog button.danger { color: #a32525; border-color: #f2c7c7; background: #fff3f3; }
.account-messenger-dialog button:disabled { opacity: .55; cursor: wait; }
.account-messenger-dialog article {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 9px;
  padding: 13px;
  border: 1px solid #dce6f4;
  border-radius: 14px;
  background: white;
}

.account-messenger-dialog article > div { display: grid; flex: 1; min-width: 0; gap: 4px; }
.account-messenger-dialog article span { overflow: hidden; color: #6b7a91; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.account-status {
  box-sizing: border-box;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 26px;
  color: #23558f;
  background: #e9f3ff;
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}
.account-provider-note { padding-bottom: 22px; color: #738199; font-size: 12px; }
.account-registration-steps {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  border: 1px solid #c7dbf4;
  border-radius: 13px;
  color: #31557f;
  background: #eef6ff;
  font-size: 12px;
  line-height: 1.45;
}
.account-registration-steps b { color: #1769df; white-space: nowrap; }
.account-checkbox { grid-template-columns: 24px 1fr !important; align-items: center; }
.account-checkbox input { min-height: auto; }
.account-active-session { margin-bottom: 18px; padding: 18px; border-radius: 17px; color: white; background: linear-gradient(135deg, #0d7b72, #10a084); }
.account-active-session > span { display: block; margin: 5px 0 14px; opacity: .78; font-size: 12px; }
.account-active-session > div { display: flex; flex-wrap: wrap; gap: 7px; }
.account-active-session button { color: #075b54; border: 0; background: white; }
.account-plus-dashboard { display: grid; gap: 14px; }
.account-plan-card { padding: 20px; border-radius: 18px; color: white; background: linear-gradient(135deg, #0b3478, #1479df 65%, #12a594); }
.account-plan-card.pro { background: radial-gradient(circle at 90% 0, rgba(78, 205, 196, .42), transparent 36%), linear-gradient(135deg, #082753, #075985 58%, #0f766e); }
.account-plan-card small { font-weight: 900; letter-spacing: .12em; opacity: .78; }
.account-plan-card h3 { margin: 7px 0 !important; font-size: 18px !important; }
.account-plan-card p { opacity: .82; font-size: 13px; }
.account-plus-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.account-plus-grid article { margin: 0; }
.account-plus-grid article span { white-space: normal; }
.account-clipboard-panel { padding: 17px; border: 1px solid #cfe0f5; border-radius: 17px; background: #fff; }
.account-clipboard-panel > p { margin: 0 0 12px; color: #64748b; font-size: 13px; line-height: 1.55; }
.account-clipboard { margin-top: 12px !important; border-color: #a7dfcf !important; background: #effcf7 !important; }
.account-history-row span { white-space: normal !important; line-height: 1.45; }
.account-pro-dashboard > section { padding: 17px; border: 1px solid #cfe0f5; border-radius: 17px; background: #fff; }
.account-filter-row { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 12px; }
.account-filter-row button { min-height: 34px; padding: 0 10px; font-size: 12px; }
.account-session-detail pre { max-height: 260px; margin: 10px 0 0; padding: 13px; overflow: auto; border-radius: 12px; color: #d7e9ff; background: #0b1f3a; font: 12px/1.55 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }

@media (max-width: 640px) {
  .account-messenger-button { right: 10px; bottom: 142px; min-height: 36px; padding: 0 12px; }
  .account-messenger-dialog {
    width: 100vw;
    max-width: none;
    height: 100dvh;
    max-height: 100dvh;
    margin: 0;
    border-radius: 0;
  }
  .account-messenger-dialog > header {
    min-height: 132px;
    padding: max(18px, env(safe-area-inset-top)) 17px 14px;
  }
  .account-messenger-dialog > header h2 { line-height: 1.2; }
  .account-messenger-dialog > .account-status { min-height: 46px; padding: 10px 16px; }
  .account-messenger-dialog > main {
    max-height: none;
    padding: 16px 16px max(28px, calc(env(safe-area-inset-bottom) + 20px));
  }
  .account-messenger-dialog > main.account-auth-main {
    max-height: none;
    padding: 16px 16px max(36px, calc(env(safe-area-inset-bottom) + 24px));
  }
  .account-auth-main > .account-status { margin: 0 -16px; }
  .account-messenger-dialog > nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    min-height: 54px;
    overflow: hidden;
  }
  .account-messenger-dialog > nav button {
    min-width: 0;
    min-height: 54px;
    padding: 6px 2px;
    font-size: 11px;
    line-height: 1.2;
    white-space: normal;
  }
  .account-plus-grid { grid-template-columns: 1fr; }
  .account-messenger-dialog article { align-items: stretch; flex-wrap: wrap; }
  .account-messenger-dialog article > div { flex-basis: 100%; }
  .account-messenger-dialog > p,
  .account-messenger-dialog > form,
  .account-messenger-dialog > .account-provider-note { margin-right: 16px; margin-left: 16px; }
  .account-auth-tabs,
  .account-registration-summary { margin-right: 16px; margin-left: 16px; }
  .account-auth-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .account-auth-tabs button { min-height: 44px; padding: 6px 4px; font-size: 11px; line-height: 1.25; }
}