/*!
 * abinScience 科研计算器组件样式（摩尔计算器 / 稀释计算器）独立版
 * 纯 CSS，无框架依赖；主题色通过 .abin-calc-widget 上的 CSS 变量覆盖即可。
 */

.abin-calc-widget {
  /* ===== 主题变量（可在宿主页面覆盖） ===== */
  --abin-primary: #e87a1e;
  --abin-primary-dark: #c9630f;
  --abin-primary-soft: #fff7f0;
  --abin-ink: #1f2d3d;
  --abin-muted: #63748a;
  --abin-border: #e3e8ee;
  --abin-border-strong: #cfd8e3;
  --abin-surface: #ffffff;
  --abin-surface-alt: #f7f9fc;
  --abin-danger: #c0392b;
  --abin-danger-soft: #fdecea;
  --abin-radius: 10px;

  box-sizing: border-box;
  max-width: 720px;
  padding: 18px 20px 22px;
  background: var(--abin-surface);
  border: 1px solid var(--abin-border);
  border-radius: var(--abin-radius);
  box-shadow: 0 2px 10px rgba(24, 46, 74, .05);
  color: var(--abin-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.abin-calc-widget *,
.abin-calc-widget *::before,
.abin-calc-widget *::after {
  box-sizing: border-box;
}

/* ================= 选项卡 ================= */
.abin-calc-tabs {
  display: flex;
  gap: 4px;
  margin: -4px -6px 16px;
  border-bottom: 1px solid var(--abin-border);
}

.abin-calc-tab {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  padding: 8px 14px 10px;
  border: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  font: inherit;
  font-weight: 600;
  color: var(--abin-muted);
  cursor: pointer;
  position: relative;
  transition: color .18s ease, background-color .18s ease;
}

.abin-calc-tab:hover {
  color: var(--abin-ink);
  background: var(--abin-surface-alt);
}

.abin-calc-tab.active {
  color: var(--abin-primary);
}

.abin-calc-tab.active::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--abin-primary);
}

.abin-calc-tab:focus-visible {
  outline: 2px solid var(--abin-primary);
  outline-offset: 2px;
}

.abin-calc-panel {
  display: none;
}

.abin-calc-panel.active {
  display: block;
}

/* ================= 公式与提示 ================= */
.abin-calc-formula {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: var(--abin-primary-soft);
  border: 1px solid #f6ddc6;
  border-left: 3px solid var(--abin-primary);
  border-radius: 8px;
}

.abin-calc-formula-label {
  flex: 0 0 auto;
  margin-top: 1px;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--abin-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 18px;
}

.abin-calc-formula-text {
  font-size: 13.5px;
  color: #8a4a10;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.abin-calc-hint {
  margin-top: 10px;
  color: var(--abin-muted);
  font-size: 12.5px;
}

.abin-calc-hint strong {
  color: var(--abin-ink);
  font-weight: 600;
}

/* ================= 表单行 ================= */
.abin-calc-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-top: 14px;
}

.abin-calc-field {
  flex: 1 1 180px;
  min-width: 152px;
  transition: box-shadow .18s ease;
}

.abin-calc-label {
  margin-bottom: 6px;
  color: var(--abin-muted);
  font-size: 12.5px;
  font-weight: 600;
}

.abin-calc-label .req {
  color: var(--abin-primary);
}

.abin-calc-input-group {
  display: flex;
  align-items: stretch;
  overflow: hidden;
  background: var(--abin-surface);
  border: 1px solid var(--abin-border-strong);
  border-radius: 7px;
  transition: border-color .18s ease, box-shadow .18s ease;
}

.abin-calc-input-group:hover {
  border-color: #b9c6d4;
}

.abin-calc-input-group:focus-within {
  border-color: var(--abin-primary);
  box-shadow: 0 0 0 3px rgba(232, 122, 30, .14);
}

.abin-calc-input {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  padding: 9px 10px;
  border: 0;
  background: transparent;
  font: inherit;
  font-variant-numeric: tabular-nums;
  color: var(--abin-ink);
  outline: none;
}

.abin-calc-input::placeholder {
  color: #aeb9c6;
}

.abin-calc-input[readonly] {
  color: var(--abin-muted);
}

.abin-calc-select {
  flex: 0 0 auto;
  max-width: 46%;
  padding: 8px 6px;
  border: 0;
  border-left: 1px solid var(--abin-border);
  background: var(--abin-surface-alt);
  font: inherit;
  font-size: 13px;
  color: #3d4f63;
  cursor: pointer;
  outline: none;
}

.abin-calc-select:focus-visible {
  background: #fff;
  box-shadow: inset 0 0 0 2px var(--abin-primary);
}

.abin-calc-operator {
  flex: 0 0 auto;
  align-self: flex-end;
  padding-bottom: 9px;
  color: #9aa9b8;
  font-size: 16px;
  font-weight: 600;
  user-select: none;
}

.abin-calc-section-title {
  margin-top: 16px;
  margin-bottom: 2px;
  color: var(--abin-ink);
  font-size: 12.5px;
  font-weight: 700;
}

.abin-calc-section-title::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 10px;
  margin-right: 6px;
  border-radius: 2px;
  background: var(--abin-primary);
  vertical-align: -1px;
}

.abin-calc-eq-sign {
  margin: 6px 0 -4px;
  color: #b3c0cc;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
}

/* 结果对应的那个输入项做淡高亮，提示"这个量是算出来的" */
.abin-calc-field.is-solved .abin-calc-input-group {
  border-color: #f0c49a;
  box-shadow: 0 0 0 3px rgba(232, 122, 30, .08);
}

/* ================= 按钮 ================= */
.abin-calc-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.abin-calc-btn {
  appearance: none;
  -webkit-appearance: none;
  padding: 9px 22px;
  border: 1px solid transparent;
  border-radius: 7px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease;
}

.abin-calc-btn:focus-visible {
  outline: 2px solid var(--abin-primary);
  outline-offset: 2px;
}

.abin-calc-btn-primary {
  background: var(--abin-primary);
  border-color: var(--abin-primary);
  color: #fff;
}

.abin-calc-btn-primary:hover {
  background: var(--abin-primary-dark);
  border-color: var(--abin-primary-dark);
}

.abin-calc-btn-primary:active {
  transform: translateY(1px);
}

.abin-calc-btn-secondary {
  background: var(--abin-surface-alt);
  border-color: var(--abin-border-strong);
  color: #46586b;
}

.abin-calc-btn-secondary:hover {
  background: #eef2f7;
  border-color: #b9c6d4;
}

/* ================= 错误 / 结果 ================= */
.abin-calc-error {
  display: none;
  margin-top: 12px;
  padding: 9px 12px;
  border: 1px solid #f3c9c4;
  border-radius: 7px;
  background: var(--abin-danger-soft);
  color: var(--abin-danger);
  font-size: 13px;
}

.abin-calc-error.show {
  display: block;
}

.abin-calc-result {
  display: none;
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid #f6ddc6;
  border-radius: 8px;
  background: var(--abin-primary-soft);
}

.abin-calc-result.show {
  display: block;
}

.abin-calc-result-label {
  margin-bottom: 4px;
  color: #a1631f;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
}

.abin-calc-result-value {
  color: #b8560d;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.abin-calc-result-note {
  margin-top: 6px;
  color: #7a6a58;
  font-size: 12.5px;
}

.abin-calc-result-note:empty {
  display: none;
}

/* ================= 小屏适配 ================= */
@media (max-width: 640px) {
  .abin-calc-widget {
    padding: 14px 14px 18px;
  }

  .abin-calc-row {
    gap: 10px;
  }

  .abin-calc-field {
    flex: 1 1 100%;
    min-width: 0;
  }

  .abin-calc-operator {
    display: none;
  }

  .abin-calc-btn {
    flex: 1 1 auto;
    text-align: center;
  }
}