:root {
  color-scheme: light;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #f4f7f8;
  color: #1b2a2f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(120deg, rgba(10, 119, 138, 0.12), transparent 34%),
    #f4f7f8;
}

button {
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  min-height: 40px;
  padding: 0 16px;
}

.app-shell {
  margin: 0 auto;
  max-width: 1120px;
  padding: 32px 20px;
}

.topbar {
  align-items: center;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  margin-bottom: 28px;
}

.eyebrow {
  color: #0d7788;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 6px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.15;
  margin-bottom: 0;
}

.session-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.status-pill {
  background: #e6edf0;
  border-radius: 999px;
  color: #486168;
  font-size: 0.86rem;
  padding: 8px 12px;
}

.primary-button {
  background: #0d7788;
  color: #ffffff;
}

.secondary-button {
  background: #dce7ea;
  color: #1b2a2f;
}

.notice-panel,
.preview-panel {
  background: #ffffff;
  border: 1px solid #dbe5e8;
  border-radius: 8px;
  box-shadow: 0 16px 34px rgba(25, 46, 54, 0.08);
  padding: 24px;
}

.notice-panel p,
.preview-panel p,
.metric-card small {
  color: #60757b;
}

.dashboard {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 16px;
}

.metric-card {
  background: #ffffff;
  border: 1px solid #dbe5e8;
  border-radius: 8px;
  min-height: 142px;
  padding: 18px;
}

.metric-label {
  color: #60757b;
  display: block;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.metric-card strong {
  display: block;
  font-size: 1.9rem;
  line-height: 1.1;
  margin-bottom: 12px;
}

.preview-panel {
  align-items: center;
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 360px);
}

.image-placeholder {
  align-items: center;
  aspect-ratio: 16 / 9;
  background: #edf3f5;
  border: 1px dashed #a9bdc3;
  border-radius: 8px;
  color: #6a7f86;
  display: flex;
  justify-content: center;
  width: 100%;
}

@media (max-width: 820px) {
  .topbar,
  .preview-panel {
    align-items: stretch;
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
  }

  .session-actions {
    justify-content: flex-start;
  }

  .dashboard {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .app-shell {
    padding: 24px 14px;
  }

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