:root {
  color-scheme: light;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: #f4f6fb;
  color: #1a1f2b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #f4f6fb 0%, #e9eef7 100%);
}

h1,
h2,
h3 {
  margin: 0;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 32px;
  background: #ffffff;
  border-bottom: 1px solid #d9dfea;
}

.app-header p {
  margin: 8px 0 0;
  color: #5a6476;
}

.connection {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: end;
  min-width: 420px;
}

.connection label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6b7280;
}

.connection input {
  padding: 8px 10px;
  border: 1px solid #c7cfdd;
  border-radius: 8px;
  font-size: 14px;
}

.connection button {
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  background: #1d4ed8;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.status {
  grid-column: 1 / -1;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #4338ca;
}

.status.error {
  background: #fee2e2;
  border-color: #fecaca;
  color: #b91c1c;
}

.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - 120px);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: #ffffff;
  border-right: 1px solid #d9dfea;
}

.tab {
  text-align: left;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: #f4f6fb;
  cursor: pointer;
  font-weight: 600;
  color: #334155;
}

.tab.is-active {
  background: #1d4ed8;
  color: #fff;
}

.content {
  padding: 24px 32px;
}

.panel {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.section-title {
  margin-bottom: 16px;
  font-size: 20px;
  color: #0f172a;
}

.section-subtitle {
  margin: 0 0 20px;
  color: #6b7280;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: #475569;
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #c7cfdd;
  font-size: 14px;
}

.action-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.action-row button {
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  background: #0f172a;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.action-row button.secondary {
  background: #e2e8f0;
  color: #0f172a;
}

.placeholder {
  border: 1px dashed #cbd5f5;
  border-radius: 12px;
  padding: 16px;
  background: #f8fafc;
  color: #475569;
  font-size: 14px;
}

.preview-host {
  margin-top: 16px;
  min-height: 320px;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  padding: 16px;
}

.list {
  margin: 0;
  padding-left: 18px;
  color: #475569;
}

.grid-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

@media (max-width: 960px) {
  .app-header {
    flex-direction: column;
  }

  .connection {
    grid-template-columns: 1fr;
    min-width: 0;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    flex-direction: row;
    flex-wrap: wrap;
  }
}