*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #060a12;
  --surface:     #0c1220;
  --surface2:    #111827;
  --surface3:    #1a2236;
  --border:      #1e293b;
  --border2:     #2d3f5c;
  --accent:      #3b82f6;
  --accent2:     #6366f1;
  --text:        #e2e8f0;
  --text-muted:  #64748b;
  --text-dim:    #94a3b8;
  --success:     #10b981;
  --danger:      #ef4444;
  --warning:     #f59e0b;
  --radius:      10px;
  --radius-lg:   16px;
  --sidebar-w:   300px;
}

/* ── Light mode ── */
[data-theme="light"] {
  --bg:        #f8fafc;
  --surface:   #ffffff;
  --surface2:  #f1f5f9;
  --surface3:  #e2e8f0;
  --border:    #e2e8f0;
  --border2:   #cbd5e1;
  --text:      #0f172a;
  --text-muted:#64748b;
  --text-dim:  #475569;
  --accent-glow: rgba(59,130,246,.15);
}

[data-theme="light"] .email-item.unread {
  background: rgba(59,130,246,.06);
}
[data-theme="light"] .email-item.unread:hover {
  background: rgba(59,130,246,.12);
}
[data-theme="light"] #htmlFrame { background: #fff; }

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* ── Layout ── */
.page { display: flex; height: 100vh; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
  gap: 16px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 4px 12px;
  border-bottom: 1px solid var(--border);
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.logo-text { font-size: 17px; font-weight: 700; letter-spacing: -.3px; flex: 1; }

.btn-theme {
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 6px;
  transition: background .15s;
  margin-left: auto;
}
.btn-theme:hover { background: var(--surface3); }

/* ── Address card ── */
.address-card {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.address-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-muted);
  font-weight: 600;
}

.address-value {
  font-size: 13px;
  font-family: 'Courier New', monospace;
  color: var(--accent);
  word-break: break-all;
  font-weight: 500;
  min-height: 18px;
}

.address-actions { display: flex; gap: 6px; }

/* ── Buttons ── */
.btn {
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all .15s;
  padding: 8px 14px;
  white-space: nowrap;
}

.btn-primary  { background: var(--accent); color: #fff; flex: 1; }
.btn-primary:hover { background: #2563eb; }

.btn-secondary {
  background: var(--surface3);
  color: var(--text);
  border: 1px solid var(--border2);
}
.btn-secondary:hover { background: var(--border2); }

.btn-ghost { background: var(--surface3); color: var(--text-dim); padding: 8px 10px; }
.btn-ghost:hover { background: var(--border2); color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-full { width: 100%; }
.btn-icon { font-size: 15px; }

/* ── TTL ── */
.ttl-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ttl-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.ttl-select {
  flex: 1;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 7px;
  color: var(--text);
  padding: 4px 8px;
  font-size: 12px;
  font-family: inherit;
  outline: none;
  cursor: pointer;
}
.ttl-select:focus { border-color: var(--accent); }

.ttl-bar { display: flex; align-items: center; gap: 8px; }

.ttl-bar-track {
  flex: 1;
  height: 4px;
  background: var(--border2);
  border-radius: 99px;
  overflow: hidden;
}

.ttl-bar-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px;
  transition: width 1s linear;
}
.ttl-bar-fill.low { background: linear-gradient(90deg, var(--warning), var(--danger)); }

.ttl-text {
  font-size: 11px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 38px;
  text-align: right;
}

/* ── Custom section ── */
.custom-section { display: flex; flex-direction: column; gap: 8px; }

.custom-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-muted);
  font-weight: 600;
}

.custom-row { display: flex; align-items: center; gap: 4px; }

.input-custom {
  flex: 1;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  padding: 7px 10px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  min-width: 0;
}
.input-custom:focus { border-color: var(--accent); }

.at-sign { color: var(--text-muted); font-size: 13px; flex-shrink: 0; }

.select-domain {
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  padding: 7px 8px;
  font-size: 12px;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  max-width: 130px;
}
.select-domain:focus { border-color: var(--accent); }

/* ── History ── */
.history-section { display: flex; flex-direction: column; gap: 6px; }

.history-list { display: flex; flex-direction: column; gap: 4px; }

.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: var(--surface3);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
}
.history-item:hover { border-color: var(--accent); background: var(--surface2); }
.history-item.active { border-color: var(--accent); }

.history-addr {
  flex: 1;
  font-size: 11px;
  font-family: monospace;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-item.active .history-addr { color: var(--accent); }

.history-del {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 2px;
  font-size: 13px;
  line-height: 1;
  flex-shrink: 0;
}
.history-del:hover { color: var(--danger); }

/* ── Sidebar footer ── */
.sidebar-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  transition: background .3s;
}
.status-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.error { background: var(--danger); }

.btn-notif {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 15px;
  opacity: .5;
  transition: opacity .15s;
  padding: 2px;
}
.btn-notif:hover { opacity: 1; }
.btn-notif.active { opacity: 1; }

/* ── Donate button ── */
.btn-donate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, #f59e0b22, #ef444422);
  border: 1px solid #f59e0b44;
  border-radius: var(--radius);
  color: #fbbf24;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
}
.btn-donate:hover { background: linear-gradient(135deg, #f59e0b33, #ef444433); border-color: #f59e0b88; }

/* ── Main ── */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.main-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
}

.inbox-title { font-size: 17px; font-weight: 600; }

.inbox-badge {
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  min-width: 24px;
  text-align: center;
}

.email-list {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}

/* ── Empty state ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 100%;
  padding: 60px 20px;
  text-align: center;
}
.empty-icon { font-size: 48px; opacity: .6; }
.empty-title { font-size: 16px; font-weight: 600; color: var(--text-dim); }
.empty-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ── Email item ── */
.email-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background .1s;
  animation: slideIn .2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.email-item:hover { background: var(--surface2); }
.email-item.unread { background: rgba(59,130,246,.04); }
.email-item.unread:hover { background: rgba(59,130,246,.09); }

.avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
  text-transform: uppercase;
}

.email-info { flex: 1; min-width: 0; }

.email-from {
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-subject {
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}
.email-item.unread .email-subject { font-weight: 600; }

.email-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  flex-shrink: 0;
}

.email-time { font-size: 11px; color: var(--text-muted); }

.unread-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
}
.email-item.unread .unread-dot { opacity: 1; }

/* ── Modal base ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(4px);
  z-index: 50;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 51;
  width: min(760px, calc(100vw - 32px));
  max-height: 85vh;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalIn .2s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: translate(-50%, calc(-50% + 12px)); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

/* ── Email modal ── */
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.modal-sender { display: flex; gap: 14px; align-items: flex-start; flex: 1; min-width: 0; }
.modal-meta { flex: 1; min-width: 0; }
.modal-subject { font-size: 15px; font-weight: 600; word-break: break-word; }
.modal-from, .modal-date { font-size: 12px; color: var(--text-muted); margin-top: 3px; }
.modal-controls { display: flex; gap: 8px; flex-shrink: 0; }

/* ── OTP badge (trong inbox list) ── */
.otp-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 4px;
  background: linear-gradient(135deg, #10b98122, #3b82f622);
  border: 1px solid #10b98155;
  color: #34d399;
  font-size: 12px;
  font-weight: 700;
  font-family: monospace;
  padding: 3px 10px;
  border-radius: 99px;
  cursor: pointer;
  transition: all .15s;
  letter-spacing: .5px;
}
.otp-badge:hover {
  background: linear-gradient(135deg, #10b98133, #3b82f633);
  border-color: #10b981aa;
}

/* ── OTP bar (trong modal) ── */
.otp-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #10b98115, #3b82f615);
  border-bottom: 1px solid #10b98133;
}

.otp-label {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

.otp-code {
  font-size: 22px;
  font-weight: 800;
  font-family: monospace;
  color: #34d399;
  letter-spacing: 4px;
  flex: 1;
}

.otp-copy {
  background: #10b981;
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 6px 14px;
  font-size: 12px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  white-space: nowrap;
}
.otp-copy:hover { background: #059669; }

/* ── Attachments bar ── */
.attachments-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.attachment-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 99px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
  transition: all .15s;
}
.attachment-chip:hover { border-color: var(--accent); color: var(--accent); }
.attachment-chip-icon { font-size: 14px; }
.attachment-size { color: var(--text-muted); font-size: 11px; }

/* ── Tabs ── */
.modal-tabs {
  display: flex;
  gap: 4px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
}

.tab {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 7px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
}
.tab:hover { background: var(--surface3); color: var(--text); }
.tab.active { background: var(--accent); color: #fff; }

.modal-body { flex: 1; overflow: hidden; }

#htmlFrame {
  width: 100%;
  height: 100%;
  min-height: 380px;
  border: none;
  background: #fff;
}

#textContent {
  padding: 20px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-y: auto;
  max-height: 400px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── QR modal ── */
.qr-modal {
  width: min(340px, calc(100vw - 32px));
}

.qr-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
}

.qr-modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 20px;
}

.qr-code-img {
  width: 220px;
  height: 220px;
  border-radius: var(--radius);
  background: #fff;
  padding: 10px;
  display: block;
}

.qr-address {
  font-size: 12px;
  font-family: monospace;
  color: var(--text-muted);
  text-align: center;
  word-break: break-all;
}

/* ── Donate modal ── */
.donate-modal { width: min(460px, calc(100vw - 32px)); max-height: 90vh; }

.donate-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
}

.donate-title { font-size: 16px; font-weight: 700; }
.donate-subtitle { font-size: 12px; color: var(--text-muted); margin-top: 3px; }

.donate-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.qr-wrap {
  display: flex;
  justify-content: center;
  background: #fff;
  border-radius: var(--radius);
  padding: 12px;
}

.qr-img { width: 100%; max-width: 240px; border-radius: 8px; display: block; }

.bank-info {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.bank-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.bank-row:last-child { border-bottom: none; }

.bank-label { font-size: 12px; color: var(--text-muted); flex-shrink: 0; }
.bank-value { font-size: 13px; font-weight: 500; text-align: right; }
.bank-note { color: var(--warning); }
.bank-stk { display: flex; align-items: center; gap: 8px; }

.btn-copy-stk {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s;
  white-space: nowrap;
}
.btn-copy-stk:hover { background: #2563eb; }

.donate-thanks {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.7;
}

/* ── Toast ── */
#toastContainer {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
}

.toast {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 12px 16px;
  min-width: 260px;
  max-width: 340px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  animation: toastIn .25s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

.toast-icon { font-size: 18px; flex-shrink: 0; }
.toast-body { flex: 1; min-width: 0; }
.toast-title { font-size: 13px; font-weight: 600; }
.toast-desc { font-size: 12px; color: var(--text-muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Utils ── */
.hidden { display: none !important; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

/* ── Mobile ── */
@media (max-width: 640px) {
  .page { flex-direction: column; overflow: auto; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .main { min-height: 50vh; }
  body { overflow: auto; }
  .modal { top: auto; bottom: 0; left: 0; right: 0; transform: none; width: 100%; max-height: 90vh; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  @keyframes modalIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}