/* ============================================================
   云快充协议报文解析工具 — 样式 v2
   设计语言：现代开发者工具风格（浅色主题）
   ============================================================ */

/* ---------------- 设计令牌 ---------------- */
:root {
  /* 色彩 */
  --bg: #f2f5f9;
  --bg-soft: #f8fafc;
  --card: #ffffff;
  --border: #e5eaf1;
  --border-strong: #d5dce6;
  --text: #1c2430;
  --text-2: #57616f;
  --text-3: #8b95a5;
  --primary: #2f6bff;
  --primary-deep: #1f56e6;
  --primary-weak: #eef3ff;
  --primary-ring: rgba(47, 107, 255, .16);
  --success: #0e9f6e;
  --success-weak: #e7f8f0;
  --warn: #b45309;
  --warn-weak: #fdf3e0;
  --error: #c93a3a;
  --error-weak: #fdeeee;
  --hl: #fff3d6;
  --hl-line: #f59e0b;

  /* 字体 */
  --font: "Inter", -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", "SF Mono", Consolas, "Courier New", monospace;

  /* 几何 */
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 7px;
  --shadow-card: 0 1px 2px rgba(23, 32, 46, .04), 0 4px 16px rgba(23, 32, 46, .05);
  --shadow-pop: 0 6px 24px rgba(23, 32, 46, .12);
  --bar-bg: #0b1220;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 420px at 20% -8%, rgba(47, 107, 255, .06), transparent 60%),
    radial-gradient(1000px 380px at 90% -6%, rgba(14, 159, 110, .05), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- 顶部应用栏 ---------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 28px;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand-logo {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(135deg, #2f6bff 0%, #22b8e5 100%);
  box-shadow: 0 4px 12px rgba(47, 107, 255, .32);
}

.brand-text h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .3px;
  line-height: 1.3;
}

.subtitle {
  margin: 1px 0 0;
  color: var(--text-3);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-actions select {
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--card) url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2357616f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center;
  appearance: none;
  -webkit-appearance: none;
  color: var(--text);
  font-size: 13px;
  font-family: var(--font);
  max-width: 240px;
  outline: none;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease;
}

.header-actions select:hover { border-color: #b9c3d2; }
.header-actions select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: all .16s ease;
  user-select: none;
}

.btn:active { transform: translateY(1px) scale(.99); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--primary-ring); }

.btn-primary {
  background: linear-gradient(180deg, #3d78ff, var(--primary));
  color: #fff;
  box-shadow: 0 2px 6px rgba(47, 107, 255, .32), inset 0 1px 0 rgba(255, 255, 255, .22);
}

.btn-primary:hover {
  background: linear-gradient(180deg, var(--primary), var(--primary-deep));
  box-shadow: 0 4px 12px rgba(47, 107, 255, .38), inset 0 1px 0 rgba(255, 255, 255, .22);
}

.btn-ghost {
  background: var(--card);
  border-color: var(--border-strong);
  color: var(--text-2);
}

.btn-ghost:hover {
  background: var(--bg-soft);
  border-color: #b9c3d2;
  color: var(--text);
}

.btn svg { flex-shrink: 0; }

/* ---------------- 主体布局 ---------------- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 22px 28px 44px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 18px 20px;
}

/* 结果卡片出现时的轻量动画 */
.result-card:not([hidden]) { animation: cardIn .28s ease; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- 输入区 ---------------- */
.input-card { padding: 18px 20px 14px; }

.input-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.input-title {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.card-index {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-weak);
  border: 1px solid rgba(47, 107, 255, .18);
  border-radius: 6px;
  padding: 1px 6px;
  letter-spacing: .5px;
}

.input-title label {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.input-hint {
  color: var(--text-3);
  font-size: 12px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

#frameInput {
  width: 100%;
  min-height: 104px;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  color: var(--text);
  resize: vertical;
  outline: none;
  word-break: break-all;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

#frameInput:hover { border-color: #b9c3d2; }

#frameInput:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.input-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
}

.byte-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1px 10px;
}

.byte-count.is-err { color: var(--error); background: var(--error-weak); border-color: #f5c2c2; }
.byte-count.is-odd { color: var(--warn); background: var(--warn-weak); border-color: #f0d9a8; }

.kbd-hint { color: var(--text-3); font-size: 12px; }

/* ---------------- 消息提示区 ---------------- */
.msg-card { padding: 10px 12px; }

.msg {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.55;
  word-break: break-all;
  border: 1px solid transparent;
  border-left-width: 4px;
}

.msg + .msg { margin-top: 6px; }

.msg .msg-icon {
  flex-shrink: 0;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  margin-top: 1px;
}

.msg-error {
  background: var(--error-weak);
  border-color: #f3c4c4;
  border-left-color: var(--error);
  color: #9c2b2b;
}
.msg-error .msg-icon { background: var(--error); color: #fff; }

.msg-warn {
  background: var(--warn-weak);
  border-color: #efd9a8;
  border-left-color: var(--warn);
  color: #8a4d08;
}
.msg-warn .msg-icon { background: var(--warn); color: #fff; }

.msg-info {
  background: var(--primary-weak);
  border-color: #c6d8ff;
  border-left-color: var(--primary);
  color: #1f4fce;
}
.msg-info .msg-icon { background: var(--primary); color: #fff; }

/* ---------------- 结果区 ---------------- */
.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.result-title {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.result-title h2 { margin: 0; font-size: 16px; letter-spacing: .2px; }

.frame-meta {
  font-size: 12.5px;
  color: var(--text-2);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 11px;
  font-family: var(--mono);
}

.badge {
  font-size: 12px;
  font-weight: 700;
  border-radius: 20px;
  padding: 2px 11px;
  letter-spacing: .2px;
}

.badge-ok {
  background: var(--success-weak);
  color: var(--success);
  border: 1px solid #bfe9d6;
}

.badge-warn {
  background: var(--warn-weak);
  color: var(--warn);
  border: 1px solid #f0d9a8;
}

.result-actions { display: flex; gap: 8px; }

/* ---------------- 帧结构可视化 ---------------- */
.byte-bar-wrap { margin: 6px 0 4px; }

.vis-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.vis-hint { color: var(--text-3); font-size: 12px; }

.byte-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 10px;
  background: var(--bar-bg);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, 0));
  border-radius: var(--radius-md);
  font-family: var(--mono);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05), 0 1px 3px rgba(11, 18, 32, .2);
}

.seg {
  padding: 3px 6px;
  border-radius: 5px;
  font-size: 12px;
  letter-spacing: .3px;
  cursor: default;
  transition: transform .12s ease, box-shadow .12s ease, opacity .18s ease, filter .18s ease;
  user-select: none;
}

.seg[data-hl] { cursor: pointer; }
.seg:hover { transform: translateY(-1px); filter: brightness(1.05); }

.seg.hl-on {
  outline: 2px solid var(--hl-line);
  outline-offset: 1px;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, .28);
  z-index: 2;
}

.seg.dim { opacity: .32; }

.byte-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-2);
}

.legend-item { display: inline-flex; align-items: center; gap: 6px; }

.legend-chip {
  width: 13px;
  height: 13px;
  border-radius: 4px;
  display: inline-block;
  border: 1px solid rgba(0, 0, 0, .14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25);
}

/* ---------------- 表格 ---------------- */
.table-title {
  margin: 16px 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.table-title::before {
  content: "";
  width: 4px;
  height: 15px;
  background: linear-gradient(180deg, var(--primary), #22b8e5);
  border-radius: 2px;
}

.table-wrap {
  overflow: auto;
  max-height: 480px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
}

.parse-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

.parse-table thead th {
  position: sticky;
  top: 0;
  z-index: 5;
  background: #f4f6fa;
  color: #465061;
  text-align: left;
  padding: 9px 14px;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: .5px;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-strong);
}

.parse-table tbody td {
  padding: 7px 14px;
  border-bottom: 1px solid #eef1f5;
  vertical-align: top;
  word-break: break-all;
}

.parse-table tbody tr:last-child td { border-bottom: none; }

.parse-table tbody tr:nth-child(even) { background: #fafbfd; }
.parse-table tbody tr:hover { background: var(--primary-weak); }

.parse-table tr.row-hl {
  background: var(--hl) !important;
  box-shadow: inset 3px 0 0 var(--hl-line);
}

/* 序号徽章 */
.col-idx { width: 44px; }

.row-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 21px;
  height: 21px;
  border-radius: 6px;
  background: #e9edf3;
  color: #68738a;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
}

tr:hover .row-idx { background: #dde7ff; color: var(--primary); }

/* 单元格语义色 */
td.val-mono {
  font-family: var(--mono);
  font-size: 12.5px;
  color: #0f172a;
  white-space: pre-wrap;
}

td.explain { color: #0d7a63; }
td.desc { color: var(--text-3); font-size: 12.5px; }

/* ---------------- 页脚 ---------------- */
.app-footer {
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-3);
  border-top: 1px dashed var(--border-strong);
  padding-top: 12px;
}

.app-footer p { margin: 4px 0; }
.app-footer strong { color: var(--text-2); font-weight: 600; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 760px) {
  main { padding: 14px 12px 32px; }
  .app-header { padding: 10px 14px; }
  .brand-text .subtitle { display: none; }
  .header-actions { width: 100%; }
  .header-actions select { flex: 1; min-width: 0; }
  .input-actions, .result-actions { width: 100%; }
  .btn { flex: 1; }
  .input-hint { display: none; }
  .table-wrap { max-height: 400px; }
}