:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #7b8799;
  --line: #e7ecf3;
  --primary: #5b6df7;
  --primary-dark: #4656d8;
  --primary-soft: #eef0ff;
  --success: #26a269;
  --warning: #b7791f;
  --danger: #d64545;
  --danger-soft: #fff0f0;
  --shadow: 0 10px 35px rgba(34, 48, 73, 0.07);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.muted { color: var(--muted); }

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 20%, rgba(91,109,247,.18), transparent 35%),
    radial-gradient(circle at 80% 70%, rgba(74,197,162,.14), transparent 34%),
    var(--bg);
}
.login-card {
  width: min(420px, 100%);
  padding: 36px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.brand-mark, .brand-icon {
  display: inline-grid;
  place-items: center;
  color: white;
  background: linear-gradient(135deg, #6171ff, #7c5cf2);
  border-radius: 12px;
}
.brand-mark { width: 52px; height: 52px; font-size: 26px; margin-bottom: 16px; }
.login-card h1 { margin: 0 0 8px; }
.login-card p { margin: 0 0 26px; color: var(--muted); }
.field-label { display: block; margin: 14px 0 8px; font-weight: 650; font-size: 14px; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 13px;
  outline: none;
  background: #fff;
  color: var(--text);
  transition: .2s ease;
}
input:focus, textarea:focus, select:focus { border-color: #aab2ff; box-shadow: 0 0 0 4px rgba(91,109,247,.1); }
.form-error { color: var(--danger); font-size: 13px; min-height: 20px; margin-top: 10px; }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 248px;
  background: #fff;
  border-right: 1px solid var(--line);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  z-index: 30;
}
.sidebar-brand { display: flex; align-items: center; gap: 12px; padding: 4px 8px 24px; }
.brand-icon { width: 38px; height: 38px; }
.sidebar-brand strong, .sidebar-brand small { display: block; }
.sidebar-brand small { color: var(--muted); margin-top: 2px; }
.nav-list { display: grid; gap: 6px; }
.nav-item {
  width: 100%;
  border: 0;
  background: transparent;
  color: #647084;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 14px;
  border-radius: 11px;
  text-align: left;
  font-weight: 650;
}
.nav-item:hover { background: #f6f7fb; color: var(--text); }
.nav-item.active { background: var(--primary-soft); color: var(--primary); }
.nav-item.danger { color: var(--danger); }
.sidebar-bottom { margin-top: auto; display: grid; gap: 10px; }
.security-badge { padding: 10px 12px; border-radius: 10px; color: #3d775d; background: #edf9f3; font-size: 13px; text-align: center; }

.main-content { margin-left: 248px; min-height: 100vh; }
.topbar {
  min-height: 92px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 34px;
  background: rgba(244,247,251,.92);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(231,236,243,.8);
}
.topbar h2 { margin: 0 0 5px; font-size: 21px; }
.topbar p { margin: 0; color: var(--muted); font-size: 13px; }
.topbar-actions { margin-left: auto; }
.page-view { padding: 28px 34px 42px; }

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: #435066;
  border-radius: 10px;
  padding: 10px 15px;
  font-weight: 650;
  transition: .18s ease;
}
.btn:hover { transform: translateY(-1px); border-color: #d7deea; box-shadow: 0 5px 16px rgba(31,45,69,.08); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-danger-soft { color: var(--danger); background: var(--danger-soft); border-color: #ffdada; }
.btn-block { width: 100%; margin-top: 18px; }
.icon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); background: #fff; color: #526077; }

.welcome-card {
  border-radius: 22px;
  padding: 34px;
  background: linear-gradient(135deg, #5c6ef7 0%, #7b5ee7 100%);
  color: #fff;
  box-shadow: 0 18px 46px rgba(91,109,247,.2);
  display: flex;
  justify-content: space-between;
  overflow: hidden;
}
.welcome-card .eyebrow { color: rgba(255,255,255,.75); }
.welcome-card h1 { font-size: 34px; margin: 8px 0; }
.welcome-card p { max-width: 620px; color: rgba(255,255,255,.84); }
.welcome-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.welcome-pills span { background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.18); padding: 8px 11px; border-radius: 999px; font-size: 13px; }
.welcome-art { font-size: 160px; line-height: .8; font-weight: 800; opacity: .13; transform: rotate(-8deg) translate(10px, 18px); }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 11px; font-weight: 800; color: var(--primary); }

.stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin: 20px 0; }
.stat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 15px;
  box-shadow: var(--shadow);
}
.stat-icon { width: 44px; height: 44px; display: grid; place-items: center; flex: 0 0 44px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); font-size: 22px; }
.stat-label { display: block; color: var(--muted); font-size: 13px; }
.stat-card strong { display: block; margin: 4px 0; font-size: 28px; }
.stat-card small { color: var(--muted); }

.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin-bottom: 20px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 14px; }
.panel-head h3 { margin: 5px 0 0; font-size: 20px; }
.guide-steps { display: grid; gap: 12px; }
.guide-step { display: flex; gap: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 13px; }
.guide-step > span { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); font-weight: 800; }
.guide-step p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.notice { border-radius: 12px; padding: 14px 16px; font-size: 14px; }
.notice.warning { background: #fff8ea; color: #806029; margin-top: 16px; border: 1px solid #ffe6b3; }
.notice.info { background: #edf5ff; color: #45668c; border: 1px solid #dcecff; }

.toolbar { display: grid; grid-template-columns: 180px minmax(250px,1fr); gap: 12px; }
.compact-field span { display: block; margin-bottom: 6px; font-size: 12px; font-weight: 700; color: var(--muted); }
.search-field { align-self: end; position: relative; }
.search-field span { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.search-field input { padding-left: 36px; }
.action-row { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0; }
.drop-zone { border: 1.5px dashed #cdd5e5; border-radius: 14px; min-height: 146px; display: grid; place-items: center; align-content: center; text-align: center; padding: 20px; background: #fbfcff; transition: .2s ease; }
.drop-zone.dragover { border-color: var(--primary); background: var(--primary-soft); }
.drop-zone strong { margin: 5px 0; }
.drop-zone p { margin: 0; color: var(--muted); font-size: 13px; }
.drop-icon { font-size: 28px; color: var(--primary); }
.result-line { padding-top: 13px; color: var(--muted); font-size: 13px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 980px; }
th, td { border-bottom: 1px solid var(--line); padding: 13px 11px; text-align: left; vertical-align: middle; }
th { color: #7a8799; font-size: 12px; font-weight: 750; background: #fbfcfe; }
td { font-size: 14px; }
td input[type="checkbox"], th input[type="checkbox"] { width: auto; }
.email-cell strong { display: block; }
.email-cell small { display: block; color: var(--muted); margin-top: 2px; max-width: 260px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tag { display: inline-flex; align-items: center; gap: 5px; padding: 5px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.tag.oauth { background: #eef0ff; color: var(--primary); }
.tag.manual { background: #f1f4f7; color: #667486; }
.tag.active { background: #ebf8f1; color: #2b7955; }
.table-actions { display: flex; gap: 7px; }
.table-actions button { border: 0; border-radius: 8px; padding: 7px 9px; background: #f5f7fa; color: #536178; }
.table-actions button:hover { background: #eceff5; }
.table-actions .read-mail { background: var(--primary-soft); color: var(--primary); }
.table-actions .trash-mail { background: #f5f1ff; color: #7057a8; }
.empty-state { text-align: center; color: var(--muted); padding: 44px; }
.pagination-bar { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding-top: 16px; }
.pagination-bar label { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; }
.pagination-bar select { width: 82px; padding: 7px 9px; }
.pagination-controls { display: flex; align-items: center; gap: 10px; }

.docs-panel { max-width: 1000px; }
.api-list { display: grid; gap: 9px; }
.api-list > div { display: grid; grid-template-columns: minmax(300px,.9fr) 1fr; gap: 18px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: 11px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: #f4f6fb; color: #4e5f7d; padding: 4px 7px; border-radius: 7px; font-size: 13px; }

.modal-backdrop { position: fixed; inset: 0; background: rgba(14,23,38,.48); backdrop-filter: blur(3px); z-index: 80; }
.modal { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 20px; }
.modal-card { width: min(660px, 100%); max-height: 88vh; overflow: hidden; background: #fff; border-radius: 18px; box-shadow: 0 30px 90px rgba(12,20,34,.25); }
.modal-card.small { width: min(500px, 100%); }
.modal-card.wide { width: min(920px, 100%); }
.modal-head { padding: 18px 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.modal-head h3 { margin: 0; }
.modal-head p { margin: 4px 0 0; }
.modal-close { border: 0; background: transparent; font-size: 26px; color: #8390a3; }
.modal-body { padding: 20px; overflow-y: auto; max-height: calc(88vh - 70px); }
.modal-body textarea { resize: vertical; }
.modal-actions { display: flex; justify-content: flex-end; gap: 9px; margin-top: 20px; }
.textarea-meta { color: var(--muted); font-size: 12px; margin-top: 7px; text-align: right; }

.messages-list { display: grid; gap: 10px; }
.message-item { border: 1px solid var(--line); border-radius: 13px; padding: 14px; }
.message-row {
  width: 100%;
  text-align: left;
  background: #fff;
  color: inherit;
  cursor: pointer;
  transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}
.message-row:hover { border-color: #c8d4e7; box-shadow: 0 8px 24px rgba(25,44,75,.08); transform: translateY(-1px); }
.mail-load-more-wrap { display: flex; justify-content: center; padding: 8px 0 2px; }
.mail-load-more { min-width: 150px; }
.mail-list-end { text-align: center; color: var(--muted); font-size: 12px; padding: 10px 0 2px; }
.message-item.unread { border-left: 4px solid var(--primary); }
.message-top { display: flex; justify-content: space-between; gap: 16px; }
.message-top strong { display: block; }
.message-top time { white-space: nowrap; color: var(--muted); font-size: 12px; }
.message-subject { font-size: 15px; line-height: 1.45; color: #24344c; }
.message-chevron { color: #9aa8bb; font-size: 24px; line-height: 1; }
.message-from { color: #52627a; font-size: 13px; margin-top: 8px; }
.message-from span { color: #7b8798; }
.message-date { display: block; color: var(--muted); font-size: 12px; margin-top: 7px; }
.message-preview { color: #69768a; font-size: 13px; margin: 10px 0 0; line-height: 1.55; }

.mail-detail-card { min-height: min(760px, 88vh); }
.mail-detail-head { align-items: flex-start; }
.mail-detail-head > div { min-width: 0; }
.mail-detail-head h3 { margin-top: 8px; font-size: 20px; line-height: 1.45; word-break: break-word; }
.mail-back-btn { border: 0; background: transparent; padding: 0; color: var(--primary); cursor: pointer; font-size: 13px; }
.mail-detail-body { min-height: 420px; background: #fafbfd; }
.mail-plain-body { margin: 0; white-space: pre-wrap; word-break: break-word; font: 14px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #27364c; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.mail-html-frame { width: 100%; min-height: 600px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }

.toast-container { position: fixed; right: 20px; bottom: 20px; z-index: 120; display: grid; gap: 10px; }
.toast { min-width: 260px; max-width: 390px; padding: 12px 14px; border-radius: 11px; box-shadow: 0 14px 40px rgba(20,30,48,.15); color: #fff; background: #364357; animation: toast-in .2s ease; }
.toast.success { background: #2f835f; }
.toast.error { background: #b94747; }
@keyframes toast-in { from { transform: translateY(8px); opacity: 0; } }

.mobile-only { display: none; }
@media (max-width: 920px) {
  .sidebar { transform: translateX(-100%); transition: .22s ease; box-shadow: 12px 0 40px rgba(20,30,48,.1); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .mobile-only { display: inline-grid; place-items: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .welcome-art { display: none; }
  .topbar, .page-view { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 650px) {
  .topbar { min-height: 76px; }
  .topbar p { display: none; }
  .topbar-actions .btn { padding: 8px 10px; font-size: 12px; }
  .page-view { padding: 18px 14px 30px; }
  .welcome-card { padding: 24px; }
  .welcome-card h1 { font-size: 28px; }
  .toolbar { grid-template-columns: 1fr; }
  .accounts-head { align-items: flex-start; }
  .pagination-bar { align-items: flex-start; flex-direction: column; }
  .api-list > div { grid-template-columns: 1fr; gap: 7px; }
  .modal { padding: 10px; }
}