/* ===================================================================
   Image Resizer — Clean, modern tool UI
   Independent file, follows cream-world design system.
   =================================================================== */

:root {
  /* Page */
  --bg-1: #faf6f1;
  --bg-2: #f3eee5;

  /* Surfaces */
  --surface: #ffffff;
  --surface-2: #faf6ed;
  --border: #e8dfcc;
  --border-soft: #f0e9da;

  /* Ink */
  --ink: #1f1a14;
  --ink-2: #5c5547;
  --ink-dim: #6e6557;

  /* Accent */
  --accent: #e85f4d;
  --accent-2: #d44a39;
  --accent-glow: rgba(232, 95, 77, 0.30);

  /* Upload */
  --dash-border: #d4c9b0;
  --dash-hover: var(--accent);

  /* Controls */
  --input-bg: #fcfbf7;
  --input-border: var(--border);

  /* Chip */
  --chip-bg: var(--surface);
  --chip-border: var(--border);
  --chip-hover-bg: #fef5f3;
  --chip-hover-border: var(--accent);
  --chip-active-bg: #fef0ed;
  --chip-active-border: var(--accent-2);

  /* Download */
  --download-bg: var(--accent);
  --download-hover: var(--accent-2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html, body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "PingFang SC", "Hiragino Sans", "Noto Sans CJK", sans-serif;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(255, 235, 220, 0.55) 0%, transparent 70%),
    var(--bg-1);
  background-attachment: fixed;
  color: var(--ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.app {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(16px, 4vw, 32px) clamp(12px, 3vw, 24px) 60px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  font-weight: 600;
  text-decoration: none;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ============ Top bar ============ */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  gap: 12px;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lang-switcher {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink-dim) 50%),
    linear-gradient(135deg, var(--ink-dim) 50%, transparent 50%);
  background-position: calc(100% - 12px) 50%, calc(100% - 7px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 22px;
  max-width: 130px;
}
.lang-switcher:hover { border-color: var(--accent); }
.lang-switcher:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.lang-switcher option {
  background: #ffffff;
  color: var(--ink);
}
.brand {
  font-family: Georgia, serif;
  font-size: clamp(14px, 3.6vw, 17px);
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.5px;
  font-weight: 700;
}
.brand:hover { opacity: 0.85; }
.nav-link {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: clamp(11px, 2.8vw, 13px);
  letter-spacing: 0.5px;
}
.nav-link:hover { color: var(--accent); }

.page-title {
  font-family: Georgia, serif;
  text-align: center;
  font-size: clamp(26px, 6vw, 42px);
  color: var(--ink);
  letter-spacing: 1.5px;
  margin-bottom: 6px;
}
.page-sub {
  text-align: center;
  color: var(--ink-dim);
  font-size: clamp(11px, 2.8vw, 13px);
  letter-spacing: 0.8px;
  margin-bottom: clamp(20px, 5vw, 32px);
  padding: 0 8px;
}

/* ============ Upload Zone ============ */
.upload-stage {
  max-width: 640px;
  margin: 0 auto clamp(24px, 5vw, 40px);
}
.upload-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: clamp(32px, 8vw, 56px) 24px;
  border: 2.5px dashed var(--dash-border);
  border-radius: 12px;
  background: var(--surface-2);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--dash-hover);
  background: #fef5f3;
}
.upload-zone.has-image {
  padding: 16px 24px;
  gap: 8px;
  border-style: solid;
  border-color: var(--border);
  background: var(--surface);
}
.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.upload-icon {
  width: 48px;
  height: 48px;
  color: var(--ink-dim);
  opacity: 0.5;
  transition: all 0.2s ease;
}
.upload-zone:hover .upload-icon,
.upload-zone.drag-over .upload-icon {
  opacity: 0.8;
  color: var(--accent);
}
.upload-zone.has-image .upload-icon {
  width: 28px;
  height: 28px;
}
.upload-label {
  font-size: clamp(14px, 3.6vw, 16px);
  color: var(--ink-dim);
  font-weight: 500;
}
.upload-hint {
  font-size: 12px;
  color: var(--ink-dim);
  opacity: 0.6;
}

/* ============ Preview ============ */
.preview-stage {
  max-width: 720px;
  margin: 0 auto clamp(24px, 5vw, 32px);
}
.preview-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: start;
}
.preview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.preview-card-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--ink-dim);
}
.preview-canvas {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  background:
    repeating-conic-gradient(#eee 0% 25%, #f6f6f6 0% 50%) 50% / 16px 16px;
}
.preview-info {
  font-size: 11px;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
}
.preview-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--ink-dim);
  padding-top: 30px;
}

/* ============ Controls ============ */
.controls-stage {
  max-width: 640px;
  margin: 0 auto clamp(24px, 5vw, 32px);
}
.controls-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: clamp(16px, 4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.control-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  min-width: 64px;
  flex-shrink: 0;
}
.control-input {
  flex: 1;
  padding: 10px 14px; min-height: 44px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s;
  font-variant-numeric: tabular-nums;
}
.control-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 95, 77, 0.10);
}
.lock-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.lock-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.lock-btn[aria-pressed="true"] {
  background: #fef5f3;
  border-color: var(--accent);
  color: var(--accent);
}
.lock-btn[aria-pressed="true"] .icon-unlocked { display: none; }
.lock-btn[aria-pressed="false"] .icon-locked { display: none; }
.lock-btn svg {
  width: 18px;
  height: 18px;
}

/* Toggle switch */
.control-row-toggle {
  margin-top: -4px;
}
.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
  user-select: none;
}
.toggle-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-track {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--border);
  border-radius: 11px;
  transition: background 0.2s;
  flex-shrink: 0;
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}
.toggle-label input:checked + .toggle-track {
  background: var(--accent);
}
.toggle-label input:checked + .toggle-track::after {
  transform: translateX(18px);
}

/* Control label static (for presets) */
.control-label-static {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
}

/* Preset chips */
.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.preset-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 16px; min-height: 44px;
  border: 1px solid var(--chip-border);
  border-radius: 8px;
  background: var(--chip-bg);
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  color: var(--ink-2);
  transition: all 0.15s;
}
.preset-chip:hover {
  border-color: var(--chip-hover-border);
  background: var(--chip-hover-bg);
}
.preset-chip.active {
  border-color: var(--chip-active-border);
  background: var(--chip-active-bg);
  color: var(--accent-2);
}
.preset-name {
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.5px;
}
.preset-dims {
  font-size: 10px;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
}
.preset-chip.active .preset-dims {
  color: var(--accent);
}

/* Format + Quality split row */
.control-row-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.control-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.control-select {
  padding: 10px 14px; min-height: 44px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink-dim) 50%),
    linear-gradient(135deg, var(--ink-dim) 50%, transparent 50%);
  background-position: calc(100% - 14px) 50%, calc(100% - 9px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px;
}
.control-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 95, 77, 0.10);
}
.quality-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.quality-range {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.quality-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.quality-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.quality-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Download button */
.btn-download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: 10px;
  background: var(--download-bg);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 0 2px 8px rgba(232, 95, 77, 0.25);
}
.btn-download:hover {
  background: var(--download-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(232, 95, 77, 0.35);
}
.btn-download:active {
  transform: translateY(0);
}
.btn-download:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-download::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 18px;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='7 10 12 15 17 10'/%3E%3Cline x1='12' y1='15' x2='12' y2='3'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='7 10 12 15 17 10'/%3E%3Cline x1='12' y1='15' x2='12' y2='3'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ============ Info section ============ */
.info {
  max-width: 640px;
  margin: clamp(20px, 5vw, 40px) auto 0;
  padding: 0 8px;
}
.info h2 {
  font-family: Georgia, serif;
  color: var(--ink);
  font-size: clamp(18px, 4.5vw, 22px);
  margin: 28px 0 12px;
  letter-spacing: 0.5px;
}
.info p, .info li {
  font-size: clamp(14px, 3.6vw, 15px);
  line-height: 1.75;
  color: var(--ink-2);
}
.info ol {
  padding-left: 22px;
  margin-bottom: 12px;
}
.info ol li { margin-bottom: 6px; }

/* ============ Footer ============ */
.site-footer {
  max-width: 640px;
  margin: 56px auto 0;
  padding: 24px 12px 0;
  border-top: 1px solid var(--border-soft);
  text-align: center;
}
.site-footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  font-size: 13px;
  color: var(--ink-dim);
}
.site-footer a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 0.15s;
}
.site-footer a:hover { color: var(--accent); }
.site-footer .sub {
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 2px;
  opacity: 0.6;
}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ RWD ============ */

/* Smaller phones */
@media (max-width: 480px) {
  .preview-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .preview-arrow {
    transform: rotate(90deg);
    padding-top: 0;
    font-size: 20px;
  }
  .control-row-split {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .preset-chips {
    justify-content: center;
  }
}

/* Very small phones */
@media (max-width: 420px) {
  .topbar-right .nav-link { display: none; }
  .topbar-right { gap: 6px; }
  .lang-switcher { max-width: 130px; font-size: 12px; padding: 4px 22px 4px 8px; }
}

/* Tablet / Desktop */
@media (min-width: 700px) {
  .controls-card {
    padding: 28px 32px;
  }
}