@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600&display=swap');

:root {
  --bg-dark: #050505;
  --bg-panel: #101822;
  --bg-panel-alt: #0f2338;
  --accent: #6cf4ff;
  --accent-strong: #47b5ff;
  --text-primary: #f8fbff;
  --text-muted: #94a7c6;
  --border: rgba(255, 255, 255, 0.08);
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top, #11273f, #050b15 60%);
  color: var(--text-primary);
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

.control-panel {
  width: 320px;
  padding: 2.5rem 2rem;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 10;
}

.panel-header .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.7rem;
  color: var(--accent);
  margin: 0 0 0.5rem 0;
}

.panel-header h1 {
  font-size: 2rem;
  margin: 0 0 0.75rem 0;
}

.panel-header .lead {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.controller-form {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.control-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-field label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.control-field select {
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0.75rem;
  appearance: none;
}

.control-field select:focus {
  outline: none;
  border-color: var(--accent);
}

.control-field.is-disabled {
  opacity: 0.4;
}

.form-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.button-group button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  font-size: 1rem;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.button-group button:hover {
  border-color: var(--accent);
}

.button-group button.is-active {
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #041421;
  border-color: transparent;
  font-weight: 600;
}

.panel-footnote {
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.viewer-panel {
  flex: 1;
  position: relative;
  background: var(--bg-panel-alt);
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.viewer-root {
  flex: 1;
  min-height: 100vh;
}

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

  .control-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .viewer-root {
    min-height: 70vh;
  }
}