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

:root {
  --bg: #0d0d0f;
  --surface: #16161a;
  --border: #2a2a32;
  --text: #e8e8ed;
  --muted: #8888a0;
  --accent: #f5c518;
  --accent-dim: #c9a012;
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  position: relative;
}

.header h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.lang-switcher {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.lang-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 600;
  border: none;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.active {
  background: var(--accent);
  color: #111;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 140px;
  padding: 2rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: #1c1c22;
}

.dropzone-icon {
  font-size: 2rem;
}

.dropzone-text {
  color: var(--muted);
}

.sliders {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.slider-row label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.hint {
  margin: 0.25rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.format-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
}

.format-picker-label {
  font-size: 0.9rem;
  color: var(--muted);
}

.format-option {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.format-option input {
  accent-color: var(--accent);
}

.btn {
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn.primary {
  background: var(--accent);
  color: #111;
}

.btn.primary:hover {
  background: var(--accent-dim);
}

.compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: start;
  margin-top: 2rem;
}

.compare-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.compare-card:last-child h2 {
  color: var(--accent);
}

.frame {
  aspect-ratio: 1;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}

.frame img,
.frame canvas {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.compare-arrow {
  align-self: center;
  font-size: 1.5rem;
  color: var(--accent);
  padding-top: 2rem;
}

.meta {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .compare {
    grid-template-columns: 1fr;
  }

  .compare-arrow {
    display: none;
  }
}