/* ─── Compress Image Tool — Premium Styles ─── */
/* Inherits global.css light/dark CSS variables */

body {
  padding: 0;
  text-align: center;
}

/* ─── Container ─── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

/* ─── Tool Hero ─── */
.container h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 6px;
  padding-top: 16px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

/* ─── Upload Box ─── */
.upload-box {
  border: 2px dashed var(--border);
  padding: 52px 40px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.upload-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s;
}

.upload-box:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.upload-box:hover::before {
  opacity: 1;
}

.upload-box p {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.upload-box:hover p {
  color: var(--accent);
}

/* ─── Controls / Quality Adjuster ─── */
.controls {
  margin: 32px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  text-align: left;
  transition: all var(--transition);
}

.controls label {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.controls label span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  padding: 4px 12px;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 8px;
}

/* ─── Range Slider ─── */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--border);
  outline: none;
  cursor: pointer;
  transition: background var(--transition);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--surface);
  box-shadow: 0 2px 8px rgba(59, 109, 245, 0.3);
  cursor: grab;
  transition: transform 0.2s, box-shadow 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 14px rgba(59, 109, 245, 0.4);
}

input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.05);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--surface);
  box-shadow: 0 2px 8px rgba(59, 109, 245, 0.3);
  cursor: grab;
}

/* ─── Preview Split (Before / After) ─── */
.preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 10px;
}

.preview > div {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  width: auto;
}

.preview > div:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Label badges */
.preview h3 {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 20px;
  color: var(--text-secondary);
  background: var(--bg);
}

/* "Original" badge — neutral */
.preview > div:first-child h3 {
  color: var(--text-tertiary);
}

/* "Compressed" badge — accent */
.preview > div:last-child h3 {
  color: var(--accent);
  background: var(--accent-light);
}

/* Images */
.preview img {
  max-width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: auto;
  object-fit: contain;
  border: 1px solid var(--border);
  background: var(--bg);
}

/* ─── Size Display ─── */
.preview p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 12px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-secondary);
  display: inline-block;
}

/* Compressed size — green tint */
.preview > div:last-child p {
  color: var(--teal);
  background: var(--teal-light);
}

/* ─── Download Button ─── */
#downloadBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  padding: 13px 32px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  border-radius: var(--radius-md);
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(59, 109, 245, 0.25);
  width: 100%;
}

#downloadBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 109, 245, 0.35);
}

#downloadBtn:active {
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .container h1 { font-size: 1.7rem; }

  .preview {
    grid-template-columns: 1fr;
  }

  .controls {
    padding: 18px 20px;
  }

  .upload-box {
    padding: 36px 24px;
  }
}