/* ============ 基础层：变量、重置、按钮、表单、提示 ============ */
:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --ink: #24221e;
  --muted: #8a857c;
  --line: #e8e5df;
  --line-soft: #f1efeb;
  --accent: #2f8f7b;
  --accent-dark: #237263;
  --accent-soft: #e7f3ef;
  --income: #2e8b57;
  --expense: #c4554a;
  --warn: #d99a2b;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(28, 25, 20, .04), 0 8px 24px rgba(28, 25, 20, .05);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.income { color: var(--income); }
.expense { color: var(--expense); }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.small, small { font-size: 12px; }
.inline { display: inline; }
.clamp { max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- 标识 ---------- */
.brand-mark {
  width: 40px; height: 40px; flex: 0 0 40px;
  display: grid; place-items: center;
  background: var(--accent);
  color: #fff; font-size: 20px; font-weight: 600;
  border-radius: 12px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: inherit; font-size: 14px;
  padding: 10px 16px; border-radius: 10px;
  border: 1px solid transparent; cursor: pointer;
  text-decoration: none; transition: .15s;
  white-space: nowrap;
}
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: #fff; border-color: var(--line); color: #55504a; }
.btn-ghost:hover { border-color: #d6d2ca; background: #fbfaf8; }
.btn-danger { background: var(--expense); color: #fff; }
.btn-danger:hover { filter: brightness(.94); }
.icon-btn {
  border: 0; background: transparent; font-size: 18px; color: var(--muted);
  cursor: pointer; padding: 4px 8px; border-radius: 8px; line-height: 1;
}
.icon-btn:hover { background: var(--line-soft); color: var(--ink); }
.link {
  border: 0; background: none; padding: 0; font: inherit; font-size: 13px;
  color: var(--accent); cursor: pointer; text-decoration: none;
}
.link:hover { text-decoration: underline; }
.link-danger { color: var(--expense); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }

/* ---------- 表单 ---------- */
.form { display: flex; flex-direction: column; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #55504a; }
.form input[type=text], .form input[type=password], .form input[type=date],
.form input[type=month], .form input[type=number], .form select, .form input[type=file] {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fdfcfa;
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  width: 100%;
}
.form input:focus, .form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: #fff;
}
.form input::placeholder { color: #b3aea6; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.row-3 { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 12px; }
.form-actions { display: flex; gap: 10px; margin-top: 4px; }
.hint { color: var(--muted); font-size: 12px; margin: 0; }

.amount-field input {
  font-size: 26px !important;
  font-weight: 600;
  letter-spacing: .5px;
  padding: 14px 14px !important;
}

/* ---------- 收支分段控件 ---------- */
.seg { display: flex; gap: 4px; background: var(--line-soft); border-radius: 10px; padding: 4px; }
.seg-item { flex: 1; position: relative; cursor: pointer; }
.seg-item input { position: absolute; opacity: 0; pointer-events: none; }
.seg-item span {
  display: block; text-align: center; padding: 9px; border-radius: 8px;
  font-size: 14px; color: #5b564f; transition: .15s;
}
.seg-item input:checked + span { background: #fff; color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.07); }
.seg-item input:checked + span.income-txt { color: var(--income); }

/* ---------- 提示 ---------- */
.toast-area { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 80; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast {
  background: #2c2a26; color: #fff; padding: 10px 18px; border-radius: 10px;
  font-size: 13px; box-shadow: 0 8px 24px rgba(0,0,0,.18);
  animation: toastIn .2s ease-out;
  max-width: 80vw;
}
.toast.err { background: #a8433a; }
.toast.ok { background: #256b53; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

.empty { padding: 28px 10px; text-align: center; color: var(--muted); font-size: 13px; }
.warn-box {
  background: #fdf3f1; border: 1px solid #f2d8d3; color: #9c453b;
  border-radius: 10px; padding: 10px 12px; font-size: 12.5px; margin-bottom: 14px;
}
.note-line { margin-top: 10px; font-size: 12.5px; color: var(--muted); padding-top: 10px; border-top: 1px solid var(--line-soft); }

@media (max-width: 820px) {
  .row-2, .row-3 { grid-template-columns: 1fr; }
}