:root {
  --bg: #0b1020;
  --panel: #141b34;
  --panel-border: #27304d;
  --text: #eef2ff;
  --muted: #a8b0cc;
  --accent: #73a7ff;
  --accent-strong: #4c8dff;
  --danger: #ff7878;
  --success: #86efac;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, #09101f 0%, #111831 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--accent);
  color: white;
  transition: 0.18s ease;
}

button:hover {
  background: var(--accent-strong);
}

button:disabled {
  background: rgba(168, 176, 204, 0.35);
  cursor: not-allowed;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  background: rgba(9, 16, 31, 0.88);
  backdrop-filter: blur(12px);
  z-index: 10;
}

.topbar h1 {
  margin: 0;
  font-size: 24px;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.status-banner {
  padding: 10px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(115, 167, 255, 0.08);
  font-size: 13px;
}

.layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1.1fr;
  gap: 16px;
  padding: 16px;
}

.panel {
  background: rgba(20, 27, 52, 0.95);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  min-height: 72vh;
  display: flex;
  flex-direction: column;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.panel-header h2 {
  margin: 0;
  font-size: 18px;
}

.email-list {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: auto;
}

.email-item {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  text-align: left;
  color: inherit;
}

.email-item:hover {
  border-color: rgba(115, 167, 255, 0.5);
}

.email-item.active {
  border-color: var(--accent);
  background: rgba(115, 167, 255, 0.14);
}

.email-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}

.email-subject {
  font-weight: 700;
  margin-bottom: 6px;
}

.email-from {
  color: var(--muted);
  font-size: 13px;
}

.detail-box {
  padding: 18px;
  overflow: auto;
  white-space: pre-wrap;
}

.empty-state {
  color: var(--muted);
}

.composer-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.composer-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.composer-form span {
  font-size: 13px;
  color: var(--muted);
}

.composer-form input,
.composer-form textarea,
.composer-form select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 12px;
}

.composer-form textarea {
  resize: vertical;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

.muted {
  color: var(--muted);
}

.success {
  color: var(--success);
}

.error {
  color: var(--danger);
}

pre.inline-code {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: auto;
  }
}