:root {
  color-scheme: dark;
  --bg: #101820;
  --panel: #17222c;
  --panel-2: #1d2a34;
  --text: #f3f7f4;
  --muted: #9aaba9;
  --line: rgba(211, 228, 219, 0.14);
  --accent: #75f0c2;
  --accent-2: #ffcc66;
  --danger: #ff6b6b;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.32);
  font-family:
    ui-sans-serif,
    "Segoe UI",
    "Microsoft YaHei",
    "PingFang SC",
    sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f2f6f3;
  --panel: #ffffff;
  --panel-2: #edf3ef;
  --text: #15211f;
  --muted: #62716d;
  --line: rgba(22, 33, 31, 0.12);
  --accent: #007b5f;
  --accent-2: #a26300;
  --danger: #c64242;
  --shadow: 0 22px 70px rgba(17, 35, 30, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(117, 240, 194, 0.12), transparent 34%),
    linear-gradient(315deg, rgba(255, 204, 102, 0.12), transparent 28%),
    var(--bg);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.26;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, #000, transparent 78%);
}

button,
input,
select {
  font: inherit;
}

button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}

.shell {
  position: relative;
  width: min(1220px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 22px 0 34px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: var(--shadow);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.top-actions,
.action-row,
.panel-header,
.message-actions,
.message-meta {
  display: flex;
  align-items: center;
}

.top-actions {
  gap: 8px;
}

.ghost-link,
.icon-button,
.primary-button,
.secondary-button,
.danger-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.ghost-link,
.icon-button {
  display: inline-grid;
  place-items: center;
  width: 42px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
}

.ghost-link {
  width: auto;
  padding: 0 14px;
  font-weight: 700;
}

.primary-button,
.secondary-button,
.danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 16px;
  font-weight: 750;
}

.primary-button {
  border-color: color-mix(in srgb, var(--accent) 52%, transparent);
  background: var(--accent);
  color: #09201a;
}

.secondary-button {
  background: color-mix(in srgb, var(--panel) 86%, var(--text));
  color: var(--text);
}

.danger-button {
  border-color: color-mix(in srgb, var(--danger) 55%, transparent);
  background: color-mix(in srgb, var(--danger) 14%, var(--panel));
  color: var(--danger);
}

button:hover,
.ghost-link:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 52%, var(--line));
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
}

.workspace {
  display: grid;
  gap: 18px;
}

.hero-panel,
.control-strip,
.inbox-panel,
.message-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.54fr);
  gap: 24px;
  min-height: 280px;
  padding: 34px;
  overflow: hidden;
}

.hero-copy {
  align-self: center;
}

.eyebrow,
.section-kicker,
.card-label {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 16px;
  font-size: clamp(40px, 7vw, 86px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 22px;
}

.hero-text {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.address-card {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel-2) 88%, transparent), transparent),
    var(--panel-2);
}

.address-display {
  min-height: 58px;
  overflow-wrap: anywhere;
  font-family:
    "Cascadia Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
  font-size: 25px;
  font-weight: 800;
  line-height: 1.25;
}

.address-meta {
  min-height: 24px;
  color: var(--muted);
  line-height: 1.5;
}

.action-row {
  flex-wrap: wrap;
  gap: 10px;
}

.control-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 14px;
  padding: 16px;
}

.create-form,
.login-form {
  display: grid;
  align-items: end;
  gap: 12px;
}

.create-form {
  grid-template-columns: minmax(180px, 1fr) minmax(180px, 0.8fr) auto auto;
}

.login-form {
  grid-template-columns: minmax(0, 1fr) auto;
}

.field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.field span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.toggle-field {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 82%, transparent);
  color: var(--text);
  cursor: pointer;
  padding: 0 12px;
  user-select: none;
}

.toggle-field input {
  width: 16px;
  min-height: 16px;
  accent-color: var(--accent);
}

.toggle-field span {
  white-space: nowrap;
  color: var(--text);
  font-size: 13px;
  font-weight: 760;
}

.toggle-field:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.5;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 82%, transparent);
  color: var(--text);
  outline: none;
  padding: 0 12px;
}

input:focus,
select:focus {
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

.mail-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.42fr) minmax(0, 1fr);
  gap: 18px;
  min-height: 560px;
}

.inbox-panel,
.message-panel {
  min-width: 0;
  overflow: hidden;
}

.inbox-panel {
  display: flex;
  flex-direction: column;
  padding: 18px;
}

.panel-header {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.count-pill {
  display: inline-grid;
  place-items: center;
  min-width: 42px;
  height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-weight: 850;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 82%, transparent);
  padding: 0 12px;
}

.search-box input {
  border: 0;
  background: transparent;
  padding: 0;
  box-shadow: none;
}

.mail-list {
  display: grid;
  align-content: start;
  gap: 8px;
  overflow: auto;
  padding-right: 2px;
}

.mail-item {
  display: grid;
  gap: 7px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 72%, transparent);
  color: var(--text);
  text-align: left;
  padding: 14px;
}

.mail-item.active {
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--panel-2));
}

.mail-subject {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 800;
}

.mail-source,
.mail-time {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-state,
.message-empty {
  display: grid;
  place-items: center;
  gap: 8px;
  min-height: 260px;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}

.empty-state strong,
.message-empty strong {
  color: var(--text);
}

.message-panel {
  display: flex;
  flex-direction: column;
  background: color-mix(in srgb, var(--panel) 96%, transparent);
}

.message-head {
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.message-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.message-title-row h2 {
  overflow-wrap: anywhere;
}

.message-actions {
  flex-wrap: wrap;
  gap: 8px;
}

.message-meta {
  flex-wrap: wrap;
  gap: 8px;
}

.meta-chip {
  max-width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  padding: 6px 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-body {
  flex: 1;
  min-height: 430px;
  padding: 0;
}

.message-body iframe {
  display: block;
  width: 100%;
  min-height: 520px;
  height: 100%;
  border: 0;
  background: #fff;
}

.message-body pre {
  min-height: 520px;
  margin: 0;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  padding: 22px;
  color: var(--text);
  font-family:
    "Cascadia Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
  line-height: 1.62;
}

.empty-icon {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  font-size: 30px;
}

.toast-region {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 20;
  display: grid;
  gap: 10px;
  width: min(360px, calc(100vw - 32px));
}

.toast {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
  padding: 12px 14px;
  color: var(--text);
}

.toast.error {
  border-color: color-mix(in srgb, var(--danger) 64%, var(--line));
}

.toast.success {
  border-color: color-mix(in srgb, var(--accent) 64%, var(--line));
}

@media (max-width: 920px) {
  .hero-panel,
  .control-strip,
  .mail-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    padding: 24px;
  }

  .create-form,
  .login-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100vw - 20px, 1220px);
    padding-top: 12px;
  }

  .topbar,
  .message-title-row {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    justify-content: flex-end;
  }

  h1 {
    font-size: 42px;
  }

  .hero-panel,
  .address-card,
  .control-strip,
  .inbox-panel,
  .message-head {
    padding: 16px;
  }

  .mail-layout {
    min-height: auto;
  }

  .message-body iframe,
  .message-body pre {
    min-height: 420px;
  }
}