/* 图片压缩工具 - 响应式样式 */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2f6fed;
  --primary-dark: #1f56c4;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
}

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- 头部 ---- */
.site-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}
.site-header h1 { font-size: 1.6rem; margin-bottom: .3rem; }
.tagline { color: var(--text-muted); font-size: .95rem; }
.tagline strong { color: var(--green); }

/* ---- 主容器 ---- */
.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem;
}

/* ---- 通用按钮 ---- */
.btn {
  display: inline-block;
  border: none;
  border-radius: 10px;
  padding: .7rem 1.4rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background .15s, transform .05s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  font-size: 1.1rem;
  padding: .85rem 2rem;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-secondary:hover { background: #eef3fe; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---- 上传区 ---- */
.upload-zone {
  background: var(--card);
  border: 2px dashed #c3ccd9;
  border-radius: var(--radius);
  padding: 2.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  box-shadow: var(--shadow);
}
.upload-zone.dragover {
  border-color: var(--primary);
  background: #eef3fe;
}
.upload-icon { font-size: 3rem; line-height: 1; }
.upload-title { font-size: 1.15rem; margin: .8rem 0 .3rem; font-weight: 600; }
.upload-hint { color: var(--text-muted); font-size: .9rem; margin-bottom: 1.2rem; }

/* ---- 参数面板 ---- */
.panel {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.2rem 1.4rem;
  margin-top: 1.2rem;
}
.panel h2, .results-head h2 { font-size: 1.1rem; margin-bottom: .8rem; }

.param-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}
@media (min-width: 640px) {
  .param-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.param label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: .4rem;
}
.param select,
.param input[type="number"] {
  width: 100%;
  padding: .5rem .6rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
  color: var(--text);
}
.param select:focus,
.param input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

.range-row {
  display: flex;
  align-items: center;
  gap: .6rem;
}
.range-row input[type="range"] { flex: 1; accent-color: var(--primary); }
.range-value {
  min-width: 3rem;
  text-align: right;
  font-weight: 600;
  color: var(--primary);
}
.param-hint { font-size: .8rem; color: var(--text-muted); margin-top: .3rem; }

.scale-inputs { margin-top: .5rem; }
.scale-inputs .hidden { display: none; }
.scale-inputs .unit { font-size: .9rem; color: var(--text-muted); margin-left: .3rem; }
.scale-inputs label { font-size: .82rem; font-weight: 500; }
.scale-inputs input { margin-top: .2rem; }

.hidden { display: none !important; }

/* ---- 结果区 ---- */
.results {
  margin-top: 1.2rem;
}
.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .6rem;
  margin-bottom: .6rem;
}
.progress-text { color: var(--text-muted); font-size: .9rem; }

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: .8rem;
}
.progress-bar-inner {
  height: 100%;
  width: 0;
  background: var(--primary);
  transition: width .2s;
}

/* ---- 卡片列表 ---- */
.card-list { display: grid; gap: .8rem; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: .9rem;
  display: flex;
  gap: .9rem;
  align-items: flex-start;
}
.card.error { border-left: 4px solid var(--red); }

.card-thumb {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
  background: #f0f2f5;
  flex-shrink: 0;
}
.card-body { flex: 1; min-width: 0; }
.card-name {
  font-weight: 600;
  font-size: .95rem;
  word-break: break-all;
  margin-bottom: .25rem;
}
.card-meta { font-size: .85rem; color: var(--text-muted); }
.card-meta .size-new { color: var(--green); font-weight: 600; }
.card-meta .size-old { text-decoration: line-through; }
.card-meta .saved { color: var(--green); font-weight: 600; margin-left: .4rem; }
.card-err { color: var(--red); font-size: .85rem; }

.card-actions { display: flex; flex-direction: column; gap: .4rem; align-items: flex-end; }
.card-actions .btn { padding: .45rem 1rem; font-size: .88rem; white-space: nowrap; }
.btn-delete {
  background: #fff;
  color: var(--red);
  border: 1.5px solid #f3c4c4;
  padding: .45rem 1rem;
  font-size: .88rem;
}
.btn-delete:hover { background: #fdf0f0; }
.card-target {
  display: inline-block;
  margin-left: .4rem;
  background: #eef3fe;
  color: var(--primary-dark);
  border-radius: 6px;
  padding: 0 .45rem;
  font-size: .8rem;
  font-weight: 600;
}

/* ---- 底部提示 ---- */
.footer-note {
  text-align: center;
  color: var(--text-muted);
  font-size: .82rem;
  margin: 1.5rem 0 2rem;
}

/* ---- 小屏微调 ---- */
@media (max-width: 480px) {
  .site-header h1 { font-size: 1.35rem; }
  .card { flex-wrap: wrap; }
  .card-actions { flex-direction: row; width: 100%; justify-content: flex-end; }
  .btn-secondary { font-size: .85rem; }
}