/* ============================================================================
   buttons.css — 全站按钮 / 图标按钮 / 胶囊 / 菜单项 / 分段 / 开关的唯一样式源。
   最后加载，靠 source-order 压过各文件里零散的 body.dark 覆盖（同特指度即可，
   不用 !important）。只用已有 token：--gradient-primary / --color-primary /
   --color-primary-rgb / --color-danger / --color-text* / --dark-l1/l2/l3。
   ========================================================================== */
:root {
  --btn-radius: 8px;
  --btn-radius-sm: 6px;
  --btn-pad-y: 8px;
  --btn-pad-x: 16px;
  --btn-font: 13px;
  --btn-primary-ink: #072320;                 /* 青→绿渐变上的深墨字（对齐设计稿 07/08）*/
  --btn-ghost-border: rgba(15, 23, 42, 0.14);
  --btn-ghost-bg: #ffffff;
  --btn-ghost-ink: #5b6675;
  --btn-focus-ring: 0 0 0 3px rgba(var(--color-primary-rgb), 0.30);
  --btn-danger-rgb: 238, 85, 85;              /* == --color-danger #e55 */
}
body.dark {
  --btn-ghost-border: rgba(255, 255, 255, 0.12);
  --btn-ghost-bg: var(--dark-l2);
  --btn-ghost-ink: #c8cdd6;
}

/* ── base ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border: 1px solid transparent;
  border-radius: var(--btn-radius);
  font-family: inherit; font-size: var(--btn-font); font-weight: 600; line-height: 1;
  cursor: pointer; user-select: none; white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: filter .15s, box-shadow .15s, background .15s, border-color .15s,
              color .15s, transform .1s, opacity .15s;
}
.btn:focus-visible { outline: none; box-shadow: var(--btn-focus-ring); }
.btn:active { transform: translateY(.5px) scale(.985); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; pointer-events: none; }

/* ── variants ─────────────────────────────────────────────────────────────── */
.btn--primary { background: var(--gradient-primary); color: var(--btn-primary-ink); }
.btn--primary svg { fill: var(--btn-primary-ink); }
.btn--primary:hover { filter: brightness(1.05); box-shadow: 0 4px 16px rgba(var(--color-primary-rgb), .28); }

.btn--ghost { background: var(--btn-ghost-bg); border-color: var(--btn-ghost-border); color: var(--btn-ghost-ink); }
.btn--ghost:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), .06);
}

.btn--subtle { background: transparent; color: var(--color-text-muted); }
.btn--subtle:hover { background: rgba(var(--color-primary-rgb), .08); color: var(--color-primary); }

.btn--danger { background: transparent; color: var(--color-danger); }
.btn--danger:hover { background: rgba(var(--btn-danger-rgb), .10); border-color: rgba(var(--btn-danger-rgb), .35); }
.btn--danger-solid { background: var(--color-danger); color: #fff; }
.btn--danger-solid:hover { filter: brightness(1.05); }

/* 石墨侧栏 CTA（新对话 / 新任务）—— 非渐变深色实心，比纯黑提亮一档 */
.btn--graphite {
  background: #2a2f3d; color: #fff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .06) inset, 0 1px 2px rgba(15, 23, 42, .18);
}
.btn--graphite:hover { filter: brightness(1.12); transform: translateY(-1px); }
.btn--graphite:active { transform: translateY(0) scale(.97); }
body.dark .btn--graphite {
  background: #2e3340; border-color: rgba(var(--color-primary-rgb), .22);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .4);
}

/* ── modifiers ────────────────────────────────────────────────────────────── */
.btn--sm { --btn-pad-y: 6px; --btn-pad-x: 12px; --btn-font: 12px; --btn-radius: var(--btn-radius-sm); }
.btn--lg { --btn-pad-y: 11px; --btn-pad-x: 22px; --btn-font: 14px; }
.btn--block { display: flex; width: 100%; }

/* ── icon button（32 圆）—— 镜像 extras.css 顶部图标按钮块 ─────────────────── */
.btn-icon {
  width: 32px; height: 32px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .5);
  background: rgba(255, 255, 255, .4);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  color: #666; cursor: pointer;
  transition: all .25s cubic-bezier(.22, 1, .36, 1);
}
.btn-icon:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), .08);
}
.btn-icon:focus-visible { outline: none; box-shadow: var(--btn-focus-ring); }
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon--sm { width: 26px; height: 26px; }
.btn-icon--34 { width: 34px; height: 34px; }
.btn-icon--square { border-radius: 8px; }
.btn-icon--flush {
  border-color: transparent; background: transparent;
  backdrop-filter: none; -webkit-backdrop-filter: none;
}
body.dark .btn-icon { border-color: rgba(255, 255, 255, .1); background: var(--dark-l2); color: #ccc; }
body.dark .btn-icon:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), .12);
}

/* ── close-x（元素上再加 .btn-icon .btn-icon--flush）───────────────────────── */
.btn-close { font-size: 22px; line-height: 1; color: var(--color-text-muted); border-radius: var(--btn-radius); }
.btn-close:hover { color: var(--color-text); background: rgba(15, 23, 42, .06); }
body.dark .btn-close:hover { background: rgba(255, 255, 255, .06); }

/* ── pill / chip ─────────────────────────────────────────────────────────── */
.pill {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 600; padding: 2px 10px; border-radius: 999px;
  border: 1px solid var(--btn-ghost-border); background: transparent; color: var(--color-text-muted);
}
.pill--on { border-color: var(--color-primary); background: rgba(var(--color-primary-rgb), .10); color: var(--color-primary); }
.pill--brand { border-color: transparent; background: var(--gradient-primary); color: var(--btn-primary-ink); border-radius: 4px; }

/* ── menu-item（下拉 / 右键菜单）────────────────────────────────────────────── */
.menu-item {
  display: flex; align-items: center; gap: 9px; width: 100%;
  padding: 8px 9px; border: 0; border-radius: 7px; background: none;
  color: var(--color-text); font-size: 12.5px; text-align: left; cursor: pointer;
}
.menu-item:hover { background: rgba(var(--color-primary-rgb), .08); }
.menu-item svg, .menu-item img { width: 15px; height: 15px; flex-shrink: 0; }
body.dark .menu-item { color: #e8e8e8; }
body.dark .menu-item:hover { background: rgba(var(--color-primary-rgb), .15); }

/* ── 分段 / tab ───────────────────────────────────────────────────────────── */
.seg { display: inline-flex; gap: 2px; padding: 3px; border-radius: 8px; background: rgba(15, 23, 42, .05); }
.seg-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 5px 10px; border: 0; border-radius: 6px; background: none;
  color: var(--color-text-muted); font-size: 12px; cursor: pointer;
  transition: background .15s, color .15s;
}
.seg-btn.is-active { background: var(--color-primary); color: #fff; }
body.dark .seg { background: rgba(255, 255, 255, .05); }
.tab-underline {
  border: 0; border-bottom: 2px solid transparent; background: none;
  padding: 8px 10px; color: var(--color-text-muted); cursor: pointer; font-size: 13px;
}
.tab-underline.is-active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ── 开关 ────────────────────────────────────────────────────────────────── */
.switch { position: relative; display: inline-block; width: 34px; height: 19px; flex-shrink: 0; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch-track {
  position: absolute; inset: 0; border-radius: 999px; background: #ccd3de;
  cursor: pointer; transition: background .15s;
}
.switch-track::before {
  content: ""; position: absolute; width: 15px; height: 15px; left: 2px; top: 2px;
  border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .2); transition: transform .15s;
}
.switch input:checked + .switch-track { background: var(--gradient-primary); }
.switch input:checked + .switch-track::before { transform: translateX(15px); }
.switch input:focus-visible + .switch-track { box-shadow: var(--btn-focus-ring); }
body.dark .switch-track { background: rgba(255, 255, 255, .18); }

/* ── 表单字段（select / input 共用外观）────────────────────────────────────── */
.field {
  width: 100%; box-sizing: border-box; padding: 8px 10px;
  border: 1px solid var(--btn-ghost-border); border-radius: var(--btn-radius);
  font: inherit; font-size: 13px; color: var(--color-text);
  background: var(--btn-ghost-bg); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field:focus { border-color: var(--color-primary); }
.field--select {
  -webkit-appearance: none; appearance: none; cursor: pointer;
  padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2399a3b3' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
body.dark .field--select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}

/* ── 少数需要 token 覆盖不到的固定几何的保留项 ──────────────────────────────── */
.btn--gold { background: #e6a817; color: #fff; }
.btn--gold:hover { background: #c99312; }
.btn--pay { background: #1677ff; color: #fff; }          /* 结账页保留支付宝蓝作支付提示 */
.btn--pay:hover { background: #0e69e8; }