:root {
  --bg-1: #1b1d1f;
  --bg-2: #e6efe8;
  --ink-1: #1f1b17;
  --ink-2: #5b5147;
  --accent: #ff6b4a;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-border: rgba(31, 27, 23, 0.12);
  --shadow: 0 18px 40px rgba(31, 27, 23, 0.18);
  --radius-lg: 20px;
  --radius-md: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Space Grotesk", "M PLUS 1p", sans-serif;
  color: var(--ink-1);
  background:
    radial-gradient(circle at 12% 12%, rgba(255, 246, 221, 0.9), transparent 45%),
    radial-gradient(circle at 82% 0%, rgba(210, 238, 230, 0.9), transparent 45%),
    linear-gradient(135deg, var(--bg-1), var(--bg-2));
}

#app {
  position: relative;
  min-height: 100vh;
  padding: 32px;
}

#stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px);
  border-radius: var(--radius-lg);
}

#canvas-wrap {
  position: relative;
}

#canvas-wrap canvas {
  display: block;
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: var(--shadow);
}

#empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
  color: var(--ink-2);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

#empty-state.is-visible {
  opacity: 1;
}

.empty-title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.empty-sub {
  margin-top: 8px;
  font-size: 14px;
  max-width: 360px;
}

#ui {
  position: fixed;
  top: 16px;
  right: 16px;
  width: min(320px, 80vw);
  max-height: calc(100vh - 32px);
  overflow: auto;
  padding: 16px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  z-index: 10;

  --tp-base-background-color: rgba(255, 255, 255, 0.78);
  --tp-base-shadow-color: rgba(0, 0, 0, 0.1);
  --tp-button-background-color: #1f1b17;
  --tp-button-foreground-color: #f6f1e6;
  --tp-container-background-color: rgba(255, 255, 255, 0.65);
  --tp-accent-color: #ff6b4a;
  --tp-accent-foreground-color: #1f1b17;
  --tp-label-foreground-color: #3c342b;
  --tp-input-background-color: rgba(255, 255, 255, 0.9);
  --tp-input-foreground-color: #1f1b17;
}

#ui.is-collapsed {
  padding-bottom: 8px;
}

#ui.is-collapsed .ui-block {
  display: none;
}

#ui .tp-btn {
  color: #f6f1e6;
}

#ui .tp-btn:hover {
  color: #f6f1e6;
}

.ui-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.ui-title {
  font-weight: 700;
  font-size: 18px;
}

#togglePanel {
  border: none;
  background: rgba(31, 27, 23, 0.08);
  color: var(--ink-1);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
}

#togglePanel:hover {
  background: rgba(31, 27, 23, 0.16);
}

.ui-block {
  margin-bottom: 14px;
  display: grid;
  gap: 8px;
}

.ui-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

#sampleSelect,
#fileInput,
#refreshSamples {
  font-family: inherit;
}

#sampleSelect {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(31, 27, 23, 0.2);
  background: rgba(255, 255, 255, 0.85);
}

.drop-zone {
  position: relative;
  display: grid;
  place-items: center;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(31, 27, 23, 0.35);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink-2);
  cursor: pointer;
  min-height: 88px;
  text-align: center;
}

.drop-zone-text {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.drop-zone.is-dragover {
  border-color: var(--accent);
  color: var(--ink-1);
  background: rgba(255, 255, 255, 0.92);
}

.drop-zone.is-disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.drop-zone #fileInput {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-zone.is-disabled #fileInput {
  pointer-events: none;
}

#refreshSamples {
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: none;
  background: var(--ink-1);
  color: #f6f1e6;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#refreshSamples:focus,
#refreshSamples:active {
  color: #f6f1e6;
}

#refreshSamples:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(31, 27, 23, 0.2);
}

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

.ui-actions button {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: none;
  background: var(--ink-1);
  color: #f6f1e6;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ui-actions button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.ui-actions button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(31, 27, 23, 0.2);
}

.ui-actions #stopButton {
  background: rgba(31, 27, 23, 0.12);
  color: var(--ink-1);
  border: 1px solid rgba(31, 27, 23, 0.2);
}

.ui-note {
  font-size: 11px;
  color: var(--ink-2);
  line-height: 1.4;
}

#pane {
  display: grid;
  gap: 10px;
}

.ui-status-tab {
  border: 1px solid rgba(31, 27, 23, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
  overflow: hidden;
}

.ui-status-tab summary {
  list-style: none;
  padding: 10px 12px;
  cursor: pointer;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ui-status-tab summary::-webkit-details-marker {
  display: none;
}

.ui-status-tab summary::after {
  content: "Show";
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-1);
  background: rgba(31, 27, 23, 0.08);
  padding: 4px 8px;
  border-radius: 999px;
}

.ui-status-tab[open] summary::after {
  content: "Hide";
}

.ui-status {
  border-top: 1px solid rgba(31, 27, 23, 0.12);
  padding: 10px 12px;
}

.ui-status-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-size: 12px;
  color: var(--ink-2);
}

.ui-status-row + .ui-status-row {
  margin-top: 6px;
}

#statusValue {
  color: var(--ink-1);
  font-weight: 600;
}

#statusValue.is-success {
  color: #1e6d4a;
}

#statusValue.is-error {
  color: #b13a2a;
}

.ui-shortcuts {
  margin-top: 8px;
  font-size: 11px;
  color: rgba(31, 27, 23, 0.5);
  letter-spacing: 0.06em;
}

#socialButtons {
  position: fixed;
  left: 20px;
  bottom: 20px;
  display: flex;
  gap: 10px;
  z-index: 9;
}

#socialButtons a {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink-1);
  text-decoration: none;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border: 1px solid rgba(31, 27, 23, 0.16);
  box-shadow: 0 10px 24px rgba(31, 27, 23, 0.18);
  backdrop-filter: blur(8px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#socialButtons a:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(31, 27, 23, 0.22);
}

@media (max-width: 720px) {
  #app {
    padding: 18px;
  }

  #stage {
    min-height: calc(100vh - 36px);
  }

  #ui {
    right: 8px;
    left: 8px;
    width: auto;
  }

  #socialButtons {
    left: 12px;
    bottom: 12px;
  }
}