/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  overflow: hidden;
  height: 100vh;
}

/* ===== App Layout ===== */
.app {
  display: flex;
  height: 100vh;
}

/* ===== Controls Panel ===== */
.controls-panel {
  width: 320px;
  min-width: 320px;
  background: #16213e;
  padding: 20px;
  overflow-y: auto;
  border-right: 2px solid #0f3460;
}

.controls-panel h1 {
  font-size: 1.4rem;
  color: #e0ca3c;
  margin-bottom: 2px;
}

.controls-panel .subtitle {
  font-size: 0.8rem;
  color: #7a7a9e;
  margin-bottom: 20px;
}

/* ===== Control Groups ===== */
.control-group {
  margin-bottom: 18px;
  padding: 14px;
  background: #1a1a3a;
  border-radius: 8px;
  border: 1px solid #2a2a5a;
}

.control-group h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8888bb;
  margin-bottom: 10px;
}

/* ===== Inputs ===== */
.input-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.input-row label {
  font-size: 0.82rem;
  color: #b0b0cc;
}

.input-row input[type="number"] {
  width: 80px;
  padding: 4px 8px;
  background: #0d1b36;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.85rem;
  text-align: right;
}

.input-row select {
  width: 160px;
  padding: 4px 8px;
  background: #0d1b36;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.85rem;
  cursor: pointer;
}

.input-row select:focus {
  border-color: #e0ca3c;
  outline: none;
}

.input-row input[type="color"] {
  width: 40px;
  height: 28px;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  cursor: pointer;
  background: transparent;
}

/* ===== Sliders ===== */
.slider-row {
  margin-bottom: 10px;
}

.slider-row label {
  display: block;
  font-size: 0.82rem;
  color: #b0b0cc;
  margin-bottom: 4px;
}

.slider-with-value {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slider-with-value input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: #2a2a5a;
  border-radius: 3px;
  outline: none;
}

.slider-with-value input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #e0ca3c;
  cursor: pointer;
  border: 2px solid #1a1a2e;
}

.slider-with-value input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #e0ca3c;
  cursor: pointer;
  border: 2px solid #1a1a2e;
}

.value-display {
  min-width: 42px;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 600;
  color: #e0ca3c;
  font-family: 'Consolas', 'Courier New', monospace;
}

.value-input {
  width: 64px;
  min-width: 54px;
  padding: 2px 4px;
  background: #0d1b36;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  color: #e0ca3c;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: 'Consolas', 'Courier New', monospace;
  text-align: right;
  -moz-appearance: textfield;
}

.value-input:focus {
  border-color: #e0ca3c;
  outline: none;
}

.value-input::-webkit-inner-spin-button,
.value-input::-webkit-outer-spin-button {
  opacity: 1;
  height: 20px;
}

/* ===== Checkboxes ===== */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.checkbox-row input[type="checkbox"] {
  accent-color: #e0ca3c;
  width: 16px;
  height: 16px;
}

.checkbox-row label {
  font-size: 0.82rem;
  color: #b0b0cc;
  cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
  padding: 8px 16px;
  background: #0f3460;
  color: #e0e0e0;
  border: 1px solid #3a3a6a;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: background 0.2s, border-color 0.2s;
}

.btn:hover {
  background: #1a4a80;
  border-color: #e0ca3c;
}

.export-buttons {
  display: flex;
  gap: 8px;
}

.export-buttons .btn {
  flex: 1;
}

.btn-small {
  margin-top: 6px;
  padding: 4px 10px;
  font-size: 0.75rem;
  width: 100%;
}

.btn-reset {
  margin-top: 10px;
  width: 100%;
  background: #2a1a3a;
  border-color: #5a3a7a;
}

.btn-reset:hover {
  background: #3a2a5a;
  border-color: #e0ca3c;
}

.btn-accent {
  background: #1a4a30;
  border-color: #3a8a5a;
}

.btn-accent:hover {
  background: #2a6a40;
  border-color: #e0ca3c;
}

.btn-tiny {
  padding: 3px 8px;
  font-size: 0.72rem;
  min-width: 32px;
  text-align: center;
}

.btn-tiny.active {
  background: #e0ca3c;
  color: #1a1a2e;
  border-color: #e0ca3c;
  font-weight: 700;
}

.button-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.button-row .btn {
  flex: 1;
}

.spiral-presets {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.stats {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.76rem !important;
  color: #b0b0cc !important;
  margin-top: 6px !important;
}

.hint {
  display: block;
  font-size: 0.7rem;
  color: #6a6a8e;
  margin-top: 2px;
  font-style: italic;
}

/* ===== Info section ===== */
.control-group.info p {
  font-size: 0.78rem;
  color: #7a7a9e;
  margin-bottom: 4px;
  line-height: 1.5;
}

.control-group.info code {
  background: #0d1b36;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.78rem;
  color: #c0c0ee;
}

/* ===== Canvas Area ===== */

/* ===== Presets ===== */
.preset-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

.preset-name-input {
  flex: 1;
  padding: 4px 8px;
  background: #0d1b36;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.82rem;
}

.preset-name-input:focus {
  border-color: #e0ca3c;
  outline: none;
}

.preset-select {
  flex: 1;
  padding: 4px 8px;
  background: #0d1b36;
  border: 1px solid #3a3a6a;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.82rem;
  cursor: pointer;
}

.preset-select:focus {
  border-color: #e0ca3c;
  outline: none;
}

.btn-small-inline {
  padding: 4px 10px;
  font-size: 0.75rem;
  white-space: nowrap;
}

.btn-danger {
  background: #3a1a1a;
  border-color: #7a3a3a;
}

.btn-danger:hover {
  background: #5a2a2a;
  border-color: #e04040;
}

/* ===== Canvas Area (continued) ===== */
.canvas-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #12121f;
  overflow: auto;
  padding: 20px;
}

#sunflowerCanvas {
  background: #ffffff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  cursor: crosshair;
}

/* ===== Scrollbar ===== */
.controls-panel::-webkit-scrollbar {
  width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
  background: #16213e;
}

.controls-panel::-webkit-scrollbar-thumb {
  background: #3a3a6a;
  border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
  background: #5a5a9a;
}

/* ===== Responsive: Tablet & Mobile ===== */
@media (max-width: 768px) {
  .app {
    flex-direction: column;
    height: auto;
    min-height: 100vh;
  }

  body {
    overflow: auto;
    height: auto;
  }

  .controls-panel {
    width: 100%;
    min-width: unset;
    max-height: 45vh;
    border-right: none;
    border-bottom: 2px solid #0f3460;
    padding: 12px;
  }

  .controls-panel h1 {
    font-size: 1.2rem;
  }

  .canvas-area {
    min-height: 55vh;
    padding: 10px;
  }

  #sunflowerCanvas {
    max-width: 100%;
    height: auto;
  }

  .export-buttons {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .controls-panel {
    padding: 8px;
    max-height: 40vh;
  }

  .control-group {
    padding: 10px;
    margin-bottom: 10px;
  }

  .control-group h2 {
    font-size: 0.78rem;
  }

  .slider-row label,
  .input-row label,
  .checkbox-row label {
    font-size: 0.75rem;
  }

  .btn {
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  .export-buttons {
    flex-direction: column;
  }

  .export-buttons .btn {
    flex: unset;
    width: 100%;
  }

  .value-input {
    width: 52px;
    min-width: 44px;
    font-size: 0.75rem;
  }
}