:root {
  color-scheme: dark;
  --bg: #0e0e0f;
  --panel: #1a1a1c;
  --panel-raised: #202023;
  --border: #2d2d31;
  --text: #ededee;
  --text-dim: #98989e;
  --accent: #1db954;
  --accent-hover: #1ed760;
  --danger: #e0685f;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  background: var(--bg);
  background-image: radial-gradient(circle at 20% 0%, rgba(29, 185, 84, 0.08), transparent 45%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

.page {
  width: 100%;
  max-width: 440px;
  padding: 2.5rem 1.5rem 4rem;
}

.page-header {
  margin-bottom: 1.75rem;
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 0.3rem;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

input[type='text'],
input[type='number'] {
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
}

input[type='text']:focus,
input[type='number']:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
}

input[type='range'] {
  accent-color: var(--accent);
}

.hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 0.25rem 0 0;
}

.preview-card {
  align-items: center;
  text-align: center;
}

.preview-frame {
  position: relative;
  width: 192px;
  height: 192px;
  background: #000;
  border-radius: 10px;
  border: 3px solid #050505;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.preview-frame img {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  display: block;
}

.preview-frame img[src=''],
.preview-frame img:not([src]) {
  display: none;
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}

.preview-info {
  width: 100%;
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.3rem 0;
}

.status-label {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.status-value {
  font-weight: 600;
  text-align: right;
}

.button-row {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

button {
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: #052e10;
  transition:
    background 0.15s ease,
    opacity 0.15s ease,
    transform 0.05s ease;
}

.button-row button {
  flex: 1;
}

button:hover {
  background: var(--accent-hover);
}

button:active {
  transform: scale(0.98);
}

button:disabled {
  opacity: 0.55;
  cursor: default;
  transform: none;
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

button.secondary:hover {
  background: var(--border);
}

.error-message {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

.mode-toggle {
  display: flex;
  gap: 0.5rem;
}

.mode-button {
  flex: 1;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.mode-button:hover {
  background: var(--border);
}

.mode-button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #052e10;
}

.manual-row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.manual-row button {
  flex: 0 0 auto;
}

input[type='color'] {
  width: 3rem;
  height: 2.4rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-raised);
}

select {
  flex: 1;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
  color: var(--text);
  font-size: 0.95rem;
}

input[type='file'] {
  flex: 1;
  color: var(--text-dim);
  font-size: 0.85rem;
  min-width: 0;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(0.5rem);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 1.1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  border-color: var(--accent);
}

@media (max-width: 480px) {
  .page {
    padding: 1.5rem 1rem 3rem;
  }

  .preview-frame {
    width: 45vw;
    height: 45vw;
    max-width: 192px;
    max-height: 192px;
  }

  .manual-row {
    flex-wrap: wrap;
  }

  .manual-row select,
  .manual-row input[type='file'] {
    flex-basis: 100%;
  }

  .mode-toggle,
  .button-row {
    flex-direction: column;
  }

  .toast {
    left: 1rem;
    right: 1rem;
    transform: translateY(0.5rem);
    text-align: center;
  }

  .toast.visible {
    transform: translateY(0);
  }
}