:root {
  --bg: #f5f7fc;
  --bg-accent: #eef4ff;
  --panel: #ffffff;
  --panel-soft: #f1f5ff;
  --border: #d8e3f2;
  --text: #0f172a;
  --muted: #55607a;
  --primary: #1f7aec;
  --primary-strong: #0ea5e9;
  --accent: #f59e0b;
  --shadow: 0 12px 36px rgba(15, 23, 42, 0.12);
  --radius: 18px;
}

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

body {
  font-family: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(31, 122, 236, 0.08), transparent 30%),
    radial-gradient(circle at 85% 0%, rgba(245, 158, 11, 0.08), transparent 25%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-accent) 55%, #e8f0ff 100%);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero {
  background: linear-gradient(135deg, #f7fbff 0%, #eef3ff 50%, #e9f5ff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  box-shadow: var(--shadow);
}

.hero-copy h1 {
  font-size: 28px;
  margin: 6px 0 6px;
}

.lede {
  color: var(--muted);
  max-width: 460px;
  line-height: 1.5;
}

.eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--primary-strong);
}

.credential-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(200px, 240px));
  gap: 12px 16px;
  align-items: end;
  flex: 1;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

.field input {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 12px;
  outline: none;
  transition: border 0.2s, box-shadow 0.2s, transform 0.15s;
}

.field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.25);
  transform: translateY(-1px);
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.3s ease, color 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 60%, #38bdf8 100%);
  color: #0f172a;
  box-shadow: 0 10px 28px rgba(31, 122, 236, 0.28);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 34px rgba(125, 211, 252, 0.38);
}

.btn.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn.ghost:hover {
  border-color: var(--primary);
  color: var(--primary-strong);
}

.hint {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 13px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 16px;
  min-height: 480px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
  min-height: 0;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-heading h2 {
  margin-top: 4px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  background: rgba(31, 122, 236, 0.06);
}

.pill.muted { color: var(--muted); }
.pill.success { color: #34d399; border-color: rgba(52, 211, 153, 0.3); }
.pill.danger { color: #f87171; border-color: rgba(248, 113, 113, 0.35); }

.email-list {
  flex: 1;
  overflow: auto;
  border-radius: 12px;
  background: #f9fbff;
  border: 1px solid var(--border);
}

.email-item {
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.email-item:last-child { border-bottom: none; }

.email-item:hover {
  background: #eef4ff;
  border-color: rgba(31, 122, 236, 0.3);
  transform: translateY(-1px);
}

.email-item.active {
  background: linear-gradient(120deg, rgba(31, 122, 236, 0.12), rgba(245, 158, 11, 0.08));
  border-left: 3px solid var(--primary-strong);
}

.item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sender {
  font-weight: 600;
  color: var(--text);
  max-width: 65%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.subject {
  margin-top: 6px;
  color: var(--text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-detail {
  flex: 1;
  overflow: auto;
  padding: 6px 4px 4px;
}

.detail-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
  margin-bottom: 14px;
}

.detail-subject {
  font-size: 22px;
  margin-bottom: 10px;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text);
}

.body-content {
  line-height: 1.6;
  font-size: 15px;
  color: var(--text);
}

.body-content pre {
  background: #f2f5fb;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 28px 14px;
}

.message {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f8fbff;
  color: var(--muted);
}

.message.error { color: #f87171; border-color: rgba(248, 113, 113, 0.35); }
.message.success { color: #34d399; border-color: rgba(52, 211, 153, 0.3); }

@media (max-width: 900px) {
  .hero { flex-direction: column; }
  .credential-form { grid-template-columns: 1fr; }
  .layout { grid-template-columns: 1fr; }
}