:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --ink: #202124;
  --ink-soft: #5f6368;
  --line: #e0e3e7;
  --hover: #f2f2f2;
  --selected: #c2e7ff;
  --selected-soft: #e8f0fe;
  --unread: #202124;
  --star: #f4b400;
  --gmail-red: #ea4335;
  --gmail-blue: #1a73e8;
  --compose: #c2e7ff;
  --send: #0b57d0;
  --danger: #d93025;
  --shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --font: "Roboto", "Helvetica Neue", Arial, sans-serif;
  --header-h: 56px;
  --nav-w: 256px;
  --list-w: minmax(340px, 40%);
  --radius: 16px;
  --app-height: 100dvh;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  height: var(--app-height);
  max-height: var(--app-height);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  position: fixed;
  inset: 0;
  width: 100%;
  touch-action: manipulation;
}

button,
input,
textarea {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.form-error {
  color: var(--danger);
  font-size: 0.875rem;
  margin: 0.5rem 0 0;
}

.icon-btn {
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
}

.icon-btn:hover {
  background: rgba(60, 64, 67, 0.08);
}

.icon-btn.light {
  color: #fff;
}

.icon-btn.light:hover {
  background: rgba(255, 255, 255, 0.12);
}

.text-link {
  border: 0;
  background: transparent;
  color: var(--gmail-blue);
  font-weight: 500;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
}

/* ---------- Google-style login ---------- */
.login-screen {
  position: relative;
  z-index: 5;
  height: var(--app-height);
  max-height: var(--app-height);
  overflow: hidden;
}

.login-screen[hidden] {
  display: none !important;
}

.gmail-login {
  height: var(--app-height);
  max-height: var(--app-height);
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  display: grid;
  place-items: center;
  padding: calc(1.5rem + var(--safe-top)) 1.5rem calc(1.5rem + var(--safe-bottom));
  background: #fff;
}

.gmail-login-card {
  width: min(450px, 100%);
  border: 1px solid #dadce0;
  border-radius: 8px;
  padding: 48px 40px 36px;
  text-align: center;
}

.gmail-logo-mark {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, #ea4335, #fbbc04, #34a853, #4285f4, #ea4335);
  position: relative;
}

.gmail-logo-mark::after {
  content: "M";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #5f6368;
  font-size: 1.2rem;
}

.gmail-login-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 400;
}

.gmail-login-sub {
  margin: 0.5rem 0 1.5rem;
  color: var(--ink);
  font-size: 1rem;
}

.gmail-login-form {
  display: grid;
  gap: 1rem;
  text-align: left;
}

.gfield input {
  width: 100%;
  border: 1px solid #dadce0;
  border-radius: 4px;
  padding: 13px 15px;
  font-size: 1rem;
}

.gfield input:focus {
  outline: none;
  border-color: var(--gmail-blue);
  box-shadow: inset 0 0 0 1px var(--gmail-blue);
}

.gmail-login-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

.btn-google-primary {
  border: 0;
  background: var(--gmail-blue);
  color: #fff;
  font-weight: 500;
  border-radius: 4px;
  padding: 0.65rem 1.5rem;
  cursor: pointer;
}

.btn-google-primary:hover {
  background: #1557b0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-google-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- Boot ---------- */
.app-page {
  height: var(--app-height);
  max-height: var(--app-height);
  overflow: hidden;
  background: var(--bg);
  padding:
    var(--safe-top)
    var(--safe-right)
    var(--safe-bottom)
    var(--safe-left);
}

.boot-screen {
  height: var(--app-height);
  max-height: var(--app-height);
  display: none;
  place-content: center;
  justify-items: center;
  gap: 0.75rem;
  color: var(--ink-soft);
  background: #fff;
  overflow: hidden;
}

.boot-screen.is-open {
  display: grid;
}

.gmail-logo-word {
  font-size: 1.75rem;
  font-weight: 400;
  color: #5f6368;
}

/* ---------- App grid ---------- */
.mail-app {
  height: 100%;
  max-height: 100%;
  min-height: 0;
  display: none;
  grid-template-columns: var(--nav-w) var(--list-w) 1fr;
  grid-template-rows: var(--header-h) minmax(0, 1fr);
  overflow: hidden;
}

.mail-app.is-open {
  display: grid;
}

/* Header */
.gmail-header {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0 1rem 0 0.5rem;
  background: var(--bg);
}

.gh-left,
.gh-right {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.gmail-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #5f6368;
  font-size: 1.375rem;
  padding: 0 0.5rem;
  white-space: nowrap;
}

.gmail-brand span {
  font-weight: 400;
  letter-spacing: -0.01em;
}

.gh-search {
  display: flex;
  justify-content: center;
}

.search-shell {
  width: min(720px, 100%);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #eaf1fb;
  border-radius: 24px;
  padding: 0 1rem;
  height: 46px;
  color: var(--ink-soft);
}

.search-shell:focus-within {
  background: #fff;
  box-shadow: var(--shadow);
}

.search-shell input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: none;
  font-size: 1rem;
  color: var(--ink);
}

.account-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
}

.account-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #7b1fa2;
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 500;
}

.account-email {
  font-size: 0.8rem;
  color: var(--ink-soft);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Left nav */
.gmail-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem 1rem 0.5rem;
  background: var(--bg);
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  min-height: 0;
}

.compose-btn {
  align-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  border: 0;
  background: var(--compose);
  color: #001d35;
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  border-radius: 16px;
  padding: 0.95rem 1.4rem 0.95rem 1rem;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15), 0 1px 3px 1px rgba(0, 0, 0, 0.1);
  margin: 0.25rem 0 0.5rem 0.35rem;
}

.compose-btn:hover {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2), 0 4px 8px rgba(0, 0, 0, 0.12);
}

.folder-nav {
  display: grid;
  gap: 0;
}

.folder-btn {
  border: 0;
  background: transparent;
  color: #202124;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.55rem 0.85rem 0.55rem 1.1rem;
  border-radius: 0 20px 20px 0;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  margin-right: 0.5rem;
}

.folder-btn:hover {
  background: rgba(32, 33, 36, 0.06);
}

.folder-btn.active {
  background: var(--selected-soft);
  color: #001d35;
  font-weight: 700;
}

.folder-btn .folder-icon {
  width: 20px;
  height: 20px;
  color: var(--ink-soft);
  flex: 0 0 auto;
}

.folder-btn.active .folder-icon {
  color: #001d35;
}

/* Message list */
.gmail-list,
.gmail-read {
  min-height: 0;
  height: 100%;
  max-height: 100%;
  background: var(--surface);
  border-radius: 16px 16px 0 0;
  margin: 0 0.5rem 0 0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.02);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.gmail-list {
  margin-right: 0.35rem;
}

.list-toolbar {
  display: flex;
  align-items: center;
  min-height: 48px;
  flex: 0 0 auto;
  padding: 0 1rem;
  border-bottom: 1px solid var(--line);
}

.list-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
}

.message-list {
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  flex: 1 1 auto;
  min-height: 0;
  touch-action: pan-y;
}

.msg-row {
  width: 100%;
  border: 0;
  border-bottom: 1px solid #f1f3f4;
  background: #fff;
  display: grid;
  grid-template-columns: 20px 180px 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.55rem 1rem;
  cursor: pointer;
  text-align: left;
  color: var(--ink-soft);
  font-size: 0.875rem;
}

.msg-row:hover {
  box-shadow: inset 1px 0 0 #dadce0, inset -1px 0 0 #dadce0, 0 1px 2px rgba(0, 0, 0, 0.1);
  z-index: 1;
  position: relative;
}

.msg-row.active {
  background: #c2dbff;
}

.msg-row.unread {
  background: #fff;
  box-shadow: inset 3px 0 0 var(--gmail-blue);
}

.msg-row.unread .msg-from,
.msg-row.unread .msg-subject {
  color: var(--unread);
  font-weight: 700;
}

.msg-star {
  color: #dadce0;
  font-size: 1rem;
  line-height: 1;
}

.msg-row.flagged .msg-star {
  color: var(--star);
}

.msg-from {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.msg-subject-line {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.msg-subject {
  color: var(--ink);
}

.msg-date {
  color: var(--ink-soft);
  font-size: 0.75rem;
  white-space: nowrap;
  font-weight: 500;
}

.msg-row.unread .msg-date {
  color: var(--ink);
  font-weight: 700;
}

.pane-status {
  padding: 3rem 1rem;
  text-align: center;
  color: var(--ink-soft);
}

/* Read pane */
.gmail-read {
  margin-left: 0;
}

.read-empty {
  margin: auto;
  text-align: center;
  color: var(--ink-soft);
}

.read-empty p {
  margin: 0.75rem 0 0;
}

.read-view {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: hidden;
}

.read-toolbar {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  min-height: 48px;
  flex: 0 0 auto;
  padding: 0 0.5rem;
  border-bottom: 1px solid var(--line);
}

.btn-reply {
  margin-left: auto;
  margin-right: 0.5rem;
  border: 1px solid #dadce0;
  background: #fff;
  border-radius: 18px;
  padding: 0.4rem 1rem;
  font-weight: 500;
  cursor: pointer;
}

.btn-reply:hover {
  background: var(--hover);
}

.read-scroll {
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  flex: 1 1 auto;
  min-height: 0;
  padding: 1rem 1.5rem 2rem;
  touch-action: pan-y;
}

.read-subject {
  margin: 0 0 1.25rem;
  font-size: 1.375rem;
  font-weight: 400;
  line-height: 1.3;
}

.read-meta {
  display: flex;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.read-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #1a73e8;
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 500;
  flex: 0 0 auto;
}

.read-from {
  font-weight: 700;
  font-size: 0.875rem;
}

.read-to,
.read-date {
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.read-body {
  font-size: 0.875rem;
  line-height: 1.5;
}

.read-body pre {
  white-space: pre-wrap;
  font-family: var(--font);
  margin: 0;
}

.read-attachments {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--ink-soft);
}

/* Compose */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  place-items: end end;
  padding: 0 var(--safe-right) var(--safe-bottom) 0;
  background: transparent;
  z-index: 50;
  pointer-events: none;
  height: var(--app-height);
  max-height: var(--app-height);
}

.modal.is-open {
  display: grid;
}

.modal-panel {
  pointer-events: auto;
  width: min(560px, calc(100vw - 1rem));
  background: #fff;
  border-radius: 8px 8px 0 0;
  box-shadow: 0 8px 10px 1px rgba(0, 0, 0, 0.14), 0 3px 14px 2px rgba(0, 0, 0, 0.12), 0 5px 5px -3px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  max-height: min(70vh, calc(var(--app-height) - 2rem));
  display: flex;
  flex-direction: column;
  margin-bottom: 0;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #404040;
  color: #fff;
  padding: 0.55rem 0.75rem 0.55rem 1rem;
}

.modal-header h2 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 500;
}

.compose-form {
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex: 1;
}

.compose-row {
  display: grid;
  grid-template-columns: 4rem 1fr;
  align-items: center;
  border-bottom: 1px solid #f1f3f4;
  padding: 0 0.75rem;
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.compose-row input {
  border: 0;
  outline: none;
  padding: 0.75rem 0.25rem;
  color: var(--ink);
}

.compose-form textarea {
  border: 0;
  outline: none;
  resize: none;
  padding: 0.85rem 1rem;
  flex: 1;
  min-height: 220px;
}

.compose-footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem 1rem;
}

.btn-send {
  border: 0;
  background: var(--send);
  color: #fff;
  font-weight: 500;
  border-radius: 18px;
  padding: 0.55rem 1.5rem;
  cursor: pointer;
}

.btn-send:hover {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

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

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  background: #323232;
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  font-size: 0.875rem;
  z-index: 60;
  box-shadow: var(--shadow);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.32);
  z-index: 30;
}

.mobile-only {
  display: none;
}

@media (max-width: 960px) {
  .mail-app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-h) minmax(0, 1fr);
    height: 100%;
    max-height: 100%;
  }

  .gmail-header {
    grid-template-columns: 1fr auto;
    min-height: var(--header-h);
    height: var(--header-h);
    padding: 0 0.5rem 0 0.15rem;
  }

  .gh-search {
    display: none;
  }

  .account-email {
    display: none;
  }

  .gmail-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(80vw, 280px);
    height: var(--app-height);
    max-height: var(--app-height);
    z-index: 35;
    transform: translateX(-105%);
    transition: transform 200ms ease;
    background: #fff;
    box-shadow: var(--shadow);
    padding-top: calc(0.5rem + var(--safe-top));
    padding-bottom: calc(1rem + var(--safe-bottom));
  }

  .gmail-nav.open {
    transform: translateX(0);
  }

  .mobile-only {
    display: inline-grid;
  }

  .gmail-list,
  .gmail-read {
    margin: 0;
    border-radius: 0;
    height: 100%;
    max-height: 100%;
  }

  .gmail-read {
    display: none;
  }

  .mail-app.show-read .gmail-list {
    display: none;
  }

  .mail-app.show-read .gmail-read {
    display: flex;
  }

  .msg-row {
    grid-template-columns: 20px 1fr auto;
  }

  .msg-from {
    display: none;
  }

  .modal {
    place-items: stretch stretch;
    padding: 0;
  }

  .modal-panel {
    width: 100%;
    max-width: 100%;
    height: var(--app-height);
    max-height: var(--app-height);
    border-radius: 0;
  }

  .compose-form textarea {
    min-height: 0;
    flex: 1 1 auto;
  }

  .sidebar-backdrop {
    height: var(--app-height);
  }
}

@media (min-width: 961px) {
  #openSidebarBtn {
    /* keep for Gmail parity */
  }
}

/* ---------- Admin dashboard ---------- */
.admin-app {
  height: var(--app-height);
  max-height: var(--app-height);
  display: none;
  background: #f6f8fc;
  color: #202124;
  overflow: hidden;
}

.admin-app.is-open {
  display: flex;
  flex-direction: column;
}

.admin-app[hidden] {
  display: none !important;
}

.admin-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex: 0 0 auto;
  min-height: var(--header-h);
  height: var(--header-h);
  padding: 0 1rem 0 0.5rem;
  background: var(--bg);
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.admin-brand .gmail-brand {
  padding-left: 0.25rem;
}

.admin-badge {
  flex: 0 0 auto;
  background: #fce8e6;
  color: #c5221f;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 0.2rem 0.45rem;
  line-height: 1.2;
}

.admin-top-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
}

.admin-inbox-btn {
  border: 0;
  background: transparent;
  color: var(--gmail-blue);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  padding: 0.45rem 0.75rem;
  border-radius: 20px;
  white-space: nowrap;
}

.admin-inbox-btn:hover {
  background: var(--selected-soft);
}

.admin-top .account-chip {
  margin-left: 0;
}

.admin-main {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  flex: 1 1 auto;
  min-height: 0;
  touch-action: pan-y;
}

.admin-hero h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 400;
}

.admin-hero p {
  margin: 0 0 1.5rem;
  color: #5f6368;
}

.admin-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.admin-card {
  background: #fff;
  border: 1px solid #e0e3e7;
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.admin-card h2 {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: #5f6368;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.admin-card p {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
  word-break: break-all;
}

.admin-panel {
  background: #fff;
  border: 1px solid #e0e3e7;
  border-radius: 12px;
  padding: 1rem 1.1rem 1.25rem;
}

.admin-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.admin-panel-head h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
}

.admin-create {
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.admin-create input {
  border: 1px solid #dadce0;
  border-radius: 4px;
  padding: 0.7rem 0.8rem;
}

.admin-create input:focus {
  outline: none;
  border-color: #1a73e8;
  box-shadow: inset 0 0 0 1px #1a73e8;
}

.admin-ok {
  color: #137333;
  font-size: 0.875rem;
  margin: 0 0 0.75rem;
}

.admin-account-list {
  display: grid;
  gap: 0.35rem;
}

.admin-account-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.75rem;
  border: 1px solid #f1f3f4;
  border-radius: 8px;
  background: #fafafa;
}

.admin-account-row strong {
  font-weight: 500;
}

.admin-account-row .admin-tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: #ea4335;
  margin-left: 0.4rem;
}

.btn-danger-text {
  border: 0;
  background: transparent;
  color: #d93025;
  font-weight: 500;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
}

.btn-danger-text:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

@media (max-width: 800px) {
  .admin-cards {
    grid-template-columns: 1fr;
  }

  .admin-create {
    grid-template-columns: 1fr;
  }

  .admin-top {
    padding: 0 0.5rem 0 0.15rem;
  }

  .admin-brand .gmail-brand span {
    display: none;
  }

  .admin-inbox-btn {
    padding: 0.4rem 0.55rem;
  }
}