:root {
  color-scheme: dark;
  --bg-page: #12151c;
  --bg-hero: #161a23;
  --surface-card: #191e28;
  --surface-elevated: #202634;
  --surface-subtle: #141820;
  --surface-hover: #242b3a;
  --border-subtle: #283040;
  --border-strong: #384257;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-soft: #cbd5e1;
  --accent-btn-bg: #d4dce8;
  --accent-btn-text: #131720;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --font-sans: "Be Vietnam Pro", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-family: var(--font-sans);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

button, input, select {
  font-family: var(--font-sans);
  font-size: inherit;
}

button {
  cursor: pointer;
}

code, pre {
  font-family: var(--font-mono);
}

.tmail-app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ================= TOP SOFT MATTE HERO ================= */
.tmail-hero {
  background: linear-gradient(180deg, #181c26 0%, #141820 100%);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 24px 34px;
}

.tmail-nav {
  max-width: 1200px;
  margin: 0 auto;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.tmail-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text-primary);
  text-decoration: none;
}

.tmail-logo-box {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent-btn-bg);
  color: var(--accent-btn-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
}

.tmail-brand-text {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.tmail-version-pill {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--surface-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.tmail-nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tmail-live-pill,
.tmail-ttl-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.tmail-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #94a3b8;
  box-shadow: 0 0 0 3px rgba(148, 163, 184, 0.16);
}

.tmail-hero-center {
  max-width: 680px;
  margin: 26px auto 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.tmail-kicker {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* Signature TMail Email Pill */
.tmail-address-pill {
  width: 100%;
  min-height: 60px;
  background: var(--surface-elevated);
  color: var(--text-primary);
  border-radius: var(--radius-pill);
  padding: 7px 9px 7px 22px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  border: 1.5px solid var(--border-strong);
}

.tmail-mail-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.tmail-address-pill code {
  font-family: var(--font-mono);
  font-size: clamp(1.08rem, 2.4vw, 1.45rem);
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tmail-pill-copy {
  height: 42px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--accent-btn-bg);
  color: var(--accent-btn-text);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 140ms ease;
}

.tmail-pill-copy:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
}

/* 4-Button TMail Row */
.tmail-actions-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 2px;
}

.tmail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 17px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 140ms ease;
}

.tmail-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.tmail-btn-white {
  background: var(--accent-btn-bg);
  color: var(--accent-btn-text);
  border: 1px solid var(--accent-btn-bg);
}

.tmail-btn-white:hover:not(:disabled) {
  background: #e2e8f0;
  border-color: #e2e8f0;
}

.tmail-btn-outline {
  background: var(--surface-card);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.tmail-btn-outline:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: #4b5563;
}

.tmail-btn-black {
  background: var(--surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.tmail-btn-black:hover:not(:disabled) {
  background: var(--surface-hover);
}

/* Custom Mailbox Switcher Bar */
.tmail-custom-bar {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius-md);
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
}

.tmail-custom-input-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  background: var(--surface-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.tmail-custom-input-group:focus-within {
  border-color: var(--accent-soft);
}

.tmail-custom-input-group input {
  border: 0;
  background: transparent;
  color: var(--text-primary);
  padding: 0 14px;
  min-height: 40px;
  outline: none;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
}

.tmail-custom-input-group select {
  border: 0;
  border-left: 1px solid var(--border-subtle);
  background: var(--surface-card);
  color: var(--text-secondary);
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.tmail-meta-text {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.tmail-meta-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.tmail-status-text {
  margin: 0;
  min-height: 18px;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--accent-soft);
}

/* Instant OTP Banner */
.tmail-otp-banner {
  width: 100%;
  background: var(--surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.tmail-otp-banner[hidden] {
  display: none !important;
}

.tmail-otp-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.tmail-otp-label {
  font-family: var(--font-sans);
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--surface-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
}

.tmail-otp-left strong {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

/* ================= MAIN EYE-CARE WORKSPACE ================= */
.tmail-workspace {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 26px 24px 40px;
}

.tmail-grid {
  display: grid;
  grid-template-columns: 390px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.tmail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.tmail-card,
.tmail-reader-card {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.tmail-card-header {
  background: var(--surface-elevated);
  color: var(--text-primary);
  min-height: 48px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tmail-card-title {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.tmail-count-badge {
  background: var(--surface-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  min-width: 24px;
  height: 22px;
  padding: 0 8px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Filter Bar */
.tmail-filter-bar {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--surface-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.tmail-filter-chip {
  flex: 1;
  min-height: 32px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--surface-card);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 120ms ease;
}

.tmail-filter-chip:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.tmail-filter-chip.is-active {
  background: var(--surface-hover);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* Inbox List */
.tmail-inbox-list {
  display: flex;
  flex-direction: column;
  max-height: 410px;
  overflow-y: auto;
}

.message-item {
  width: 100%;
  text-align: left;
  background: var(--surface-card);
  color: var(--text-primary);
  border: 0;
  border-bottom: 1px solid var(--border-subtle);
  border-left: 3px solid transparent;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: background 120ms ease;
}

.message-item:hover {
  background: var(--surface-elevated);
}

.message-item.is-selected {
  background: var(--surface-elevated);
  border-left-color: var(--accent-soft);
}

.message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.77rem;
  color: var(--text-secondary);
}

.message-meta strong {
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.datlk-subject-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.message-subject {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-item.is-selected .message-subject {
  color: var(--text-primary);
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--surface-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

/* Public 24h History List */
.tmail-history-list {
  display: flex;
  flex-direction: column;
  max-height: 290px;
  overflow-y: auto;
}

.datlk-history-chip {
  width: 100%;
  text-align: left;
  background: var(--surface-card);
  color: var(--text-primary);
  border: 0;
  border-bottom: 1px solid var(--border-subtle);
  border-left: 3px solid transparent;
  padding: 11px 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  transition: background 120ms ease;
}

.datlk-history-chip:hover {
  background: var(--surface-elevated);
}

.datlk-history-chip.is-active {
  background: var(--surface-elevated);
  border-left-color: var(--accent-soft);
}

.datlk-history-addr {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.datlk-history-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

/* Right Reader Card */
.tmail-reader-card {
  min-height: 620px;
  display: flex;
  flex-direction: column;
}

.tmail-reader-topbar {
  min-height: 48px;
  padding: 0 22px;
  background: var(--surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tmail-reader-title {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.tmail-reader-hint {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.tmail-message-view {
  flex: 1;
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.tmail-message-view header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.datlk-detail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.tmail-message-view h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.tmail-message-view header p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.tmail-message-view header p strong {
  color: var(--text-primary);
  font-weight: 600;
}

.message-body {
  background: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 20px;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  line-height: 1.72;
  color: #d8dee9;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  min-height: 320px;
}

/* Empty & Waiting States */
.empty-state {
  flex: 1;
  min-height: 220px;
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
  gap: 10px;
}

.tmail-waiting-box {
  margin: auto;
  max-width: 420px;
  padding: 40px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.tmail-waiting-icon {
  width: 66px;
  height: 66px;
  border-radius: 50%;
  border: 1.5px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  background: var(--surface-subtle);
}

.tmail-waiting-box h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tmail-waiting-box p {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.tmail-empty-small {
  padding: 18px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Footer */
.tmail-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--surface-subtle);
  padding: 18px 24px;
}

.tmail-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.tmail-footer-inner strong {
  color: var(--text-primary);
  font-weight: 600;
}

@media (max-width: 960px) {
  .tmail-grid {
    grid-template-columns: 1fr;
  }
  .tmail-reader-card {
    min-height: 420px;
  }
}

@media (max-width: 600px) {
  .tmail-hero {
    padding: 0 16px 28px;
  }
  .tmail-custom-bar {
    grid-template-columns: 1fr;
  }
  .tmail-address-pill {
    padding-left: 14px;
  }
  .tmail-workspace {
    padding: 18px 14px 30px;
  }
}


/* Language Switcher */
.tmail-lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: var(--radius-pill);
  background: var(--surface-subtle);
  border: 1px solid var(--border-strong);
  gap: 2px;
}

.tmail-lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  transition: all 120ms ease;
}

.tmail-lang-btn:hover {
  color: var(--text-primary);
}

.tmail-lang-btn.is-active {
  background: var(--accent-btn-bg);
  color: var(--accent-btn-text);
}