/* Core Viewport and Tab Mechanics */
.viewport-display {
  flex-grow: 1;
  padding: 0 16px;
  position: relative;
}

.tab-panel {
  display: none;
  opacity: 0;
  transform: scale(0.98) translateY(10px);
  transition: opacity 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1),
              transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* M3 Component Surfaces */
.m3-card {
  background-color: var(--m3-sys-surface-container);
  border-radius: var(--m3-radius-large);
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}

.hero-card {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero-main {
  display: flex;
  align-items: center;
  gap: 24px;
}

.hero-icon-frame {
  width: 96px;
  height: 96px;
}

.hero-icon-frame img { width: 100%; height: 100%; object-fit: contain; }

.hero-metrics h1 { font-size: 64px; font-weight: 300; color: #fff; letter-spacing: -2px; }
.hero-metrics .unit { color: var(--m3-sys-secondary); font-size: 32px; font-weight: 400; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.metric-tile {
  background-color: var(--m3-sys-surface-container-high);
  padding: 16px;
  border-radius: var(--m3-radius-standard);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-tile .lbl { font-size: 13px; color: var(--m3-sys-secondary); }
.metric-tile .val { font-size: 18px; font-weight: 600; color: #fff; }

/* Responsive Grid Arrays */
.forecast-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 16px;
}

@media(min-width: 600px) {
  .forecast-grid { grid-template-columns: repeat(5, 1fr); }
}

.fc-card {
  background-color: var(--m3-sys-surface-container);
  border-radius: var(--m3-radius-standard);
  padding: 16px;
  text-align: center;
}

/* Embedded Media Layer */
.iframe-container {
  width: 100%;
  height: 70vh;
  border-radius: var(--m3-radius-large);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.iframe-container iframe { width: 100%; height: 100%; border: none; }

/* Severe Workspace Splits */
.severe-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media(min-width: 768px) {
  .severe-workspace { grid-template-columns: 240px 1fr; }
}

.severe-controls-sidebar {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 60vh;
  overflow-y: auto;
}

.spc-selector {
  background: var(--m3-sys-surface-container);
  color: var(--m3-sys-secondary);
  border: none;
  padding: 14px 18px;
  text-align: left;
  border-radius: var(--m3-radius-standard);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.spc-selector.active {
  background-color: var(--m3-sys-primary);
  color: var(--m3-sys-on-primary);
  font-weight: 600;
}

.severe-viewer-frame {
  border-radius: var(--m3-radius-large);
  overflow: hidden;
  background-color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.severe-viewer-frame img { max-width: 100%; height: auto; transition: opacity 0.2s; }