/* ───────── 設計變數 ───────── */
:root{
  --bg:#f6f4ff;
  --bg-2:#ecebff;
  --surface:#ffffff;
  --surface-2:#f8f7ff;
  --border:#ece9ff;
  --border-strong:#dcd6ff;
  --text:#22203a;
  --text-2:#5d5b7a;
  --muted:#9491b3;

  --primary:#7c5cff;
  --primary-dark:#5d40e6;
  --primary-soft:#efeaff;
  --accent:#ff7ab6;

  --success:#22c393;
  --danger:#ef5d6f;
  --warning:#ffb547;

  --radius:18px;
  --radius-sm:12px;
  --shadow-sm:0 2px 8px rgba(124,92,255,.08);
  --shadow:0 12px 30px rgba(124,92,255,.12);
  --shadow-lg:0 24px 60px rgba(124,92,255,.18);

  --font:'Noto Sans TC','PingFang TC','Microsoft JhengHei',system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  background:linear-gradient(135deg,var(--bg) 0%,var(--bg-2) 100%);
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
button,input,select{font-family:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
.hidden{display:none !important}
.muted{color:var(--muted);font-size:13px}
.small-tip{font-size:12px;color:var(--muted);margin-bottom:12px}
.spacer{flex:1}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border-radius:12px;font-weight:500;font-size:14px;
  transition:transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 6px 16px rgba(124,92,255,.35)}
.btn.primary:hover{box-shadow:0 8px 22px rgba(124,92,255,.5)}
.btn.ghost{background:transparent;color:var(--text-2)}
.btn.ghost:hover{background:var(--primary-soft);color:var(--primary-dark)}
.btn.small{padding:6px 12px;font-size:13px}
.btn.icon{padding:8px 12px;font-size:18px;line-height:1}
.btn.block{width:100%;padding:12px}
.btn.danger{background:#fff0f2;color:var(--danger)}
.btn.danger:hover{background:#ffd9df}

/* Login */
.login-page{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:20px;
  background:
    radial-gradient(circle at 15% 10%, #ffd1e8 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, #c8b9ff 0%, transparent 45%),
    linear-gradient(135deg,#f6f4ff,#ecebff);
}
.login-card{
  background:var(--surface);
  border-radius:24px;
  padding:36px 32px;
  width:100%;
  max-width:380px;
  box-shadow:var(--shadow-lg);
  text-align:center;
}
.login-logo{
  font-size:48px;
  width:80px;height:80px;margin:0 auto 12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#ffd1e8,#c8b9ff);
  border-radius:50%;
}
.login-card h1{margin:8px 0 4px;font-size:24px}
.login-card form{margin-top:24px;text-align:left;display:flex;flex-direction:column;gap:14px}
.login-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-2)}
.login-card input{
  padding:12px 14px;border:1.5px solid var(--border-strong);
  border-radius:12px;font-size:15px;background:var(--surface-2);transition:.2s;
}
.login-card input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px var(--primary-soft)}
.error-msg{color:var(--danger);font-size:13px;text-align:center;min-height:18px}

/* App layout */
.app-page{padding-bottom:80px}
.topbar{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--border);
  padding:12px 24px;
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:17px}
.brand-icon{
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#ffd1e8,#c8b9ff);border-radius:10px;font-size:18px;
}
.tabs{display:flex;gap:4px;background:var(--primary-soft);padding:4px;border-radius:12px}
.tab{
  padding:8px 16px;border-radius:8px;font-weight:500;font-size:14px;
  color:var(--text-2);transition:.2s;
}
.tab.active{background:#fff;color:var(--primary-dark);box-shadow:var(--shadow-sm)}
.user-area{margin-left:auto;display:flex;align-items:center;gap:12px}
.user-display{font-size:14px;color:var(--text-2)}

.tab-panel{display:none;padding:24px;max-width:1280px;margin:0 auto}
.tab-panel.active{display:block}

/* Card */
.card{
  background:var(--surface);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow-sm);
  margin-bottom:20px;
}
.card h2{margin:0 0 16px;font-size:16px}
.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}
.card-head h2{margin:0}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-2 > .card{margin-bottom:0}

/* Month header */
.month-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px}
.month-picker{display:flex;align-items:center;gap:8px}
.ym{display:flex;gap:6px}
.ym select{
  padding:8px 12px;border:1.5px solid var(--border);border-radius:10px;
  background:#fff;font-weight:500;font-size:14px;
}

/* Stats */
.big-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.big-stat{
  background:var(--surface-2);
  border-radius:14px;
  padding:14px;
  display:flex;flex-direction:column;gap:4px;
  border:1px solid var(--border);
}
.big-stat span{font-size:12px;color:var(--muted)}
.big-stat strong{font-size:20px;font-weight:700;letter-spacing:.5px}
.big-stat.expense strong{color:var(--danger)}
.big-stat.savings strong{color:var(--primary-dark)}
.big-stat.income strong{color:var(--success)}
.big-stat.balance strong{color:var(--text)}

/* Tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
table thead th{
  text-align:left;padding:10px 12px;
  background:var(--surface-2);
  color:var(--text-2);font-weight:600;font-size:13px;
  border-bottom:1px solid var(--border);
}
table tbody td{
  padding:12px;
  border-bottom:1px solid var(--border);
  vertical-align:middle;
}
table tbody tr:hover{background:var(--surface-2)}
.cat-table td:nth-child(2),
.cat-table td:nth-child(3),
.cat-table td:nth-child(4){text-align:right;font-variant-numeric:tabular-nums}
.cat-table .editable{cursor:pointer;color:var(--primary-dark);font-weight:500}
.cat-table .neg{color:var(--danger)}
.cat-table .pos{color:var(--success)}
.record-table td{font-variant-numeric:tabular-nums}
.record-table td.amount{text-align:left;font-weight:500}
.record-table td.note{text-align:left;font-weight:500}
.record-table .row-actions{display:flex;gap:4px;justify-content:flex-end}

.tag{
  display:inline-block;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:500;
  background:var(--primary-soft);color:var(--primary-dark);
}
.tag-expense{background:#ffe6f0;color:#c43b6f}
.tag-saving{background:#dcf5ea;color:#157f54}
.tag-income{background:#e2f8d9;color:#3a7d1c}
.tag-卡費{background:#ffe6f0;color:#c43b6f}
.tag-現金{background:#fff3d6;color:#a06410}
.tag-匯款{background:#dff5ff;color:#1e6f9c}
.tag-稅費{background:#e9e3ff;color:#5d40e6}
.tag-存股{background:#dcf5ea;color:#157f54}
.tag-收入{background:#e2f8d9;color:#3a7d1c}

.empty{padding:24px;text-align:center;color:var(--muted);font-size:14px}

/* Filters */
.filter-row{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;margin-bottom:14px}
.filter-row label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--text-2)}
.filter-row input,
.filter-row select{
  padding:9px 12px;border:1.5px solid var(--border);border-radius:10px;background:#fff;font-size:14px;
}
.filter-row input:focus,
.filter-row select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}

/* Charts */
.chart-wrap{position:relative;height:280px}

/* Settings tabs */
.settings-tabs{
  display:flex;gap:6px;margin-bottom:18px;
  background:var(--surface);padding:6px;border-radius:14px;
  box-shadow:var(--shadow-sm);overflow-x:auto;
}
.settings-tab{
  padding:8px 16px;border-radius:10px;font-weight:500;font-size:14px;
  color:var(--text-2);transition:.2s;white-space:nowrap;
}
.settings-tab.active{background:var(--primary-soft);color:var(--primary-dark)}
.settings-panel{display:none}
.settings-panel.active{display:block}

.pw-form{display:flex;flex-direction:column;gap:14px;max-width:400px}
.pw-form label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--text-2)}
.pw-form input{
  padding:10px 12px;border:1.5px solid var(--border);border-radius:10px;background:#fff;font-size:14px;
}
.pw-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.pw-form button{align-self:flex-start}

.checkbox-label{flex-direction:row !important;align-items:center;gap:8px !important;padding-top:24px}
.checkbox-label input{width:16px;height:16px;accent-color:var(--primary)}

.badge{
  display:inline-flex;align-items:center;padding:2px 10px;border-radius:99px;
  font-size:12px;font-weight:500;background:var(--primary-soft);color:var(--primary-dark);
}
.badge.gray{background:#eee;color:#666}

/* Modal */
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:16px}
.modal-mask{position:absolute;inset:0;background:rgba(34,32,58,.45);backdrop-filter:blur(4px)}
.modal-body{
  position:relative;background:var(--surface);border-radius:20px;
  width:100%;max-width:520px;padding:24px;box-shadow:var(--shadow-lg);
  animation:pop .2s ease;max-height:90vh;overflow-y:auto;
}
.modal-body.small{max-width:380px}
@keyframes pop{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.modal-head h3{margin:0;font-size:18px}
.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:14px}
.form-row label{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--text-2)}
.form-row input,
.form-row select{
  padding:10px 12px;border:1.5px solid var(--border);border-radius:10px;background:#fff;font-size:14px;
}
.form-row input:focus,
.form-row select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.form-row input[readonly]{background:var(--surface-2);color:var(--text-2)}
.modal-foot{display:flex;align-items:center;gap:8px;margin-top:18px;padding-top:14px;border-top:1px solid var(--border)}

/* Toast */
.toast{
  position:fixed;left:50%;bottom:32px;transform:translateX(-50%);
  background:var(--text);color:#fff;padding:10px 18px;border-radius:99px;
  font-size:14px;z-index:100;box-shadow:var(--shadow);
  animation:fadeUp .25s ease;
}
@keyframes fadeUp{from{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%,0)}}

/* RWD */
@media (max-width:880px){
  .grid-2{grid-template-columns:1fr}
  .big-stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .topbar{flex-wrap:wrap;gap:10px;padding:10px 14px}
  .brand-text{display:none}
  .tabs{order:3;width:100%;overflow-x:auto}
  .tab{flex:1;text-align:center;padding:8px 4px;font-size:13px}
  .user-area{margin-left:auto;order:2}
  .user-display{display:none}
  .tab-panel{padding:14px}
  .card{padding:14px;border-radius:14px}
  .month-header{flex-direction:column;align-items:stretch;gap:10px}
  .month-picker{justify-content:space-between}
  .ym{flex:1;justify-content:center}
  .ym select{flex:1}
  .big-stat strong{font-size:17px}
  table{font-size:13px}
  table thead th{padding:8px 8px;font-size:12px}
  table tbody td{padding:10px 8px}
  .filter-row{gap:8px}
  .filter-row label{flex:1;min-width:140px}
  .form-row{grid-template-columns:1fr}
  .modal-body{padding:18px;border-radius:16px}
  .chart-wrap{height:240px}
  .checkbox-label{padding-top:0}
}