:root {
  --bg: #efe7da;
  --bg-soft: #f8f3ea;
  --surface: rgba(255, 252, 246, 0.84);
  --surface-strong: #fffdf7;
  --ink: #1b2631;
  --ink-soft: #546271;
  --line: rgba(27, 38, 49, 0.12);
  --accent: #cb5d2d;
  --accent-deep: #a4421a;
  --teal: #285f6b;
  --shadow: 0 18px 40px rgba(32, 44, 59, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(203, 93, 45, 0.16), transparent 32%),
    radial-gradient(circle at top right, rgba(40, 95, 107, 0.16), transparent 26%),
    linear-gradient(180deg, #f4ede1 0%, #eee5d7 100%);
}

button,
input,
textarea {
  font: inherit;
}

.page-shell {
  max-width: 1580px;
  margin: 0 auto;
  padding: 32px 22px 36px;
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 20px;
  margin-bottom: 22px;
}

.hero-copy,
.hero-meta,
.panel {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 28px;
  border-radius: 30px;
}

.hero-meta {
  padding: 20px;
  border-radius: 30px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.hero-card {
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.72), rgba(255, 247, 236, 0.92));
  border: 1px solid rgba(27, 38, 49, 0.08);
}

.hero-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.3rem;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

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

h1 {
  font-size: clamp(2rem, 3.8vw, 4.2rem);
  line-height: 0.96;
  margin-bottom: 16px;
}

.hero-text,
.panel-heading p,
.meta-text,
.token-hint,
.mailbox-subline,
.message-meta,
.empty-state {
  color: var(--ink-soft);
}

.label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.top-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  margin-bottom: 18px;
}

.panel {
  padding: 20px;
  border-radius: 26px;
}

.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-heading h2 {
  font-size: 1.18rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.8fr auto;
  gap: 12px;
}

.form-grid label,
.token-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.token-row {
  flex-direction: row;
  align-items: center;
}

.auth-form {
  display: grid;
  gap: 12px;
}

.session-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.session-card {
  display: grid;
  gap: 8px;
}

.hidden {
  display: none !important;
}

input {
  width: 100%;
  border: 1px solid rgba(27, 38, 49, 0.12);
  background: rgba(255, 253, 248, 0.96);
  color: var(--ink);
  border-radius: 16px;
  padding: 13px 14px;
  outline: none;
}

input:focus {
  border-color: rgba(203, 93, 45, 0.55);
  box-shadow: 0 0 0 4px rgba(203, 93, 45, 0.12);
}

button {
  border: none;
  border-radius: 16px;
  padding: 13px 18px;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: white;
}

.secondary-btn {
  background: linear-gradient(135deg, var(--teal), #1d4f5a);
  color: white;
}

.ghost-btn {
  background: rgba(27, 38, 49, 0.06);
  color: var(--ink);
}

.status-strip {
  margin-bottom: 18px;
}

.flash {
  min-height: 24px;
  padding: 0 4px;
  color: var(--teal);
}

.flash.error {
  color: #b33224;
}

.workspace {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr 1.2fr;
  gap: 20px;
  min-height: 620px;
}

.mailbox-list,
.message-list,
.message-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 520px;
}

.mailbox-card,
.message-card,
.detail-card {
  border: 1px solid rgba(27, 38, 49, 0.08);
  border-radius: 20px;
  background: var(--surface-strong);
}

.mailbox-card {
  padding: 16px;
}

.mailbox-card.active,
.message-card.active {
  border-color: rgba(203, 93, 45, 0.45);
  box-shadow: 0 10px 24px rgba(203, 93, 45, 0.12);
}

.mailbox-top,
.message-top,
.detail-header,
.detail-meta,
.mailbox-actions {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.mailbox-address,
.message-subject,
.detail-title {
  font-weight: 700;
}

.mailbox-subline,
.message-meta,
.detail-meta,
.detail-pre {
  font-size: 0.94rem;
}

.mailbox-actions {
  margin-top: 14px;
}

.mailbox-actions button,
.copy-btn {
  padding: 9px 12px;
  font-size: 0.92rem;
}

.code-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 2px;
}

.code-badges-large {
  margin-top: 0;
}

.code-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(203, 93, 45, 0.12);
  color: var(--accent-deep);
  border: 1px solid rgba(203, 93, 45, 0.18);
  font-size: 0.96rem;
  font-weight: 700;
}

.code-empty {
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.metric-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(40, 95, 107, 0.1);
  color: var(--teal);
  font-size: 0.88rem;
}

.message-card {
  padding: 14px 16px;
  cursor: pointer;
}

.detail-card {
  padding: 18px;
  overflow: hidden;
}

.detail-body {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.detail-section {
  border: 1px solid rgba(27, 38, 49, 0.08);
  border-radius: 18px;
  padding: 14px;
  background: rgba(247, 243, 235, 0.72);
}

.detail-section h3 {
  margin-bottom: 10px;
  font-size: 0.96rem;
}

.detail-pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
}

.html-frame {
  width: 100%;
  min-height: 360px;
  border: 1px solid rgba(27, 38, 49, 0.08);
  border-radius: 14px;
  background: #fff;
}

.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px dashed rgba(27, 38, 49, 0.18);
  border-radius: 20px;
  padding: 28px;
  background: rgba(255, 252, 246, 0.46);
}

.mono {
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
}

@media (max-width: 1180px) {
  .hero,
  .top-grid,
  .workspace {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 720px) {
  .page-shell {
    padding: 18px 14px 24px;
  }

  .hero-copy,
  .hero-meta,
  .panel {
    border-radius: 22px;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .form-grid,
  .token-row,
  .session-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .workspace {
    min-height: auto;
  }

  .mailbox-list,
  .message-list,
  .message-detail {
    min-height: auto;
  }
}