/**
 * 时间范围分段 Tab（Range segment）
 * 用于：学习统计弹窗「近两周 / 近一个月 / … / 自定义」等互斥选项。
 * 未选中：浅底 + Headline + 8px 圆角；**1px** 实线 `var(--color-btn-outline-border)`（可见；不要用 transparent）；hover 时 `--color-neutral-3`；
 * 选中 `.is-active`：2px `--color-progress-alpha-2` 实线（与未选中 1px 切齐避免错位）。
 *
 * 结构：
 *   <div class="range-segment" role="tablist"> 或带修饰 .range-segment--grid-5
 *     <button type="button" class="range-segment__btn is-active" …>近两周</button>
 *     <button type="button" class="range-segment__btn range-segment__btn--picker">自定义<svg>…</svg></button>
 *   </div>
 */

.range-segment {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 8px;
  max-width: 620px;
  margin: 0 auto 8px;
}

/* 固定 5 列等宽（设计系统演示或独立使用） */
.range-segment--grid-5 {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  max-width: 100%;
  margin: 0;
  gap: 8px;
  align-items: stretch;
}

/* 统计弹窗右侧窄槽：与 --grid-5 同布局，无需额外类名 */
.stats-modal__range-slot .range-segment {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  max-width: 100%;
  margin: 0;
  gap: 8px;
  align-items: stretch;
}

.range-segment__btn {
  flex: 1 1 0;
  min-width: 72px;
  min-height: 36px;
  height: 36px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 14px;
  border: 1px solid var(--color-btn-outline-border);
  border-image: none;
  border-radius: 8px;
  background: var(--color-btn-outline);
  color: var(--color-neutral-7);
  font-family: var(--font-family-sans);
  font-size: var(--text-headline-size);
  font-weight: var(--text-headline-weight);
  line-height: var(--text-headline-line-height);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  transition:
    transform 0.1s ease,
    border-color 0.15s ease,
    color 0.15s ease,
    background-color 0.15s ease;
}

.range-segment__btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: transparent;
  transition: background 0.15s ease;
  pointer-events: none;
  border-radius: inherit;
}

.range-segment__btn:hover:not(.is-active)::after {
  background: rgba(26, 26, 26, 0.05);
}

.range-segment__btn:hover:not(.is-active) {
  border-color: var(--color-neutral-3);
}

.range-segment__btn:active {
  transform: scale(0.98);
}

.range-segment__btn:active:not(.is-active)::after {
  background: rgba(26, 26, 26, 0.1);
}

.range-segment--grid-5 > .range-segment__btn,
.stats-modal__range-slot .range-segment__btn {
  flex: none;
  min-width: 0;
  width: 100%;
  padding: 4px 8px;
}

.range-segment__btn.is-active {
  border-width: 2px;
  border-style: solid;
  border-color: var(--color-progress-alpha-2);
  border-image: none;
  color: var(--color-text-2);
  background: var(--color-btn-outline);
}

.range-segment__btn.is-active:hover {
  background: var(--color-neutral-1);
  color: var(--color-text-1);
}

.range-segment__btn.is-active:hover::after {
  background: transparent;
}

.range-segment__btn.is-active:active::after {
  background: transparent;
}

.range-segment__btn--picker {
  gap: 4px;
}

.range-segment--grid-5 > .range-segment__btn--picker,
.stats-modal__range-slot .range-segment__btn--picker {
  gap: 4px;
}

.range-segment__btn--picker svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-text-4);
  transition: color 0.15s ease;
}

.range-segment__btn:hover .range-segment__btn--picker svg,
.range-segment__btn.is-active .range-segment__btn--picker svg {
  color: inherit;
}

[data-theme="dark"] .range-segment__btn:not(.is-active) {
  background: var(--color-btn-outline);
  border-width: 1px;
  border-style: solid;
  border-color: var(--color-btn-outline-border);
  border-image: none;
  color: var(--color-text-3);
}

[data-theme="dark"] .range-segment__btn:hover:not(.is-active) {
  border-color: var(--color-neutral-5);
}

[data-theme="dark"] .range-segment__btn:hover:not(.is-active)::after {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .range-segment__btn:active:not(.is-active)::after {
  background: rgba(0, 0, 0, 0.14);
}

[data-theme="dark"] .range-segment__btn.is-active {
  border-width: 2px;
  border-style: solid;
  border-color: var(--color-progress-alpha-2);
  border-image: none;
  color: var(--color-text-2);
}

[data-theme="dark"] .range-segment__btn.is-active:hover {
  background: var(--color-neutral-2);
  color: var(--color-text-1);
}