/* ═══════════════════════════════════════
   绿蛙科技财务记账 — Green Frog Theme
   ═══════════════════════════════════════ */

:root {
  --green: #2e7d32;
  --green-light: #4caf50;
  --green-pale: #e8f5e9;
  --green-dark: #1b5e20;
  --ink: #1c1c1e;
  --ink-soft: #555;
  --ink-muted: #999;
  --bg: #f5f7f5;
  --surface: #fff;
  --red: #c62828;
  --red-pale: #ffebee;
  --border: #e0e0e0;
  --r: 6px;
  --font: 'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.6}

/* Header */
header{
  background:linear-gradient(135deg,var(--green-dark),var(--green));
  color:#fff;padding:0 var(--sp,24px);display:flex;
  align-items:center;justify-content:space-between;flex-wrap:wrap;
  gap:12px;min-height:60px;
}
.brand{font-size:1.2rem;font-weight:700;letter-spacing:.04em}
.frog{font-size:1.5rem;margin-right:6px;vertical-align:middle}
nav{display:flex;gap:4px;flex-wrap:wrap}
.nav-btn{
  color:rgba(255,255,255,.75);text-decoration:none;padding:8px 16px;
  border-radius:var(--r);font-size:.88rem;transition:all .2s;
}
.nav-btn:hover,.nav-btn.active{background:rgba(255,255,255,.15);color:#fff}

/* Main */
main{max-width:1100px;margin:0 auto;padding:24px 16px}
.tab{display:none}
.tab.active{display:block}

/* Stats Grid */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:16px}
.stat-card{
  background:var(--surface);padding:20px 24px;border-radius:var(--r);
  border:1px solid var(--border);text-align:center;
  box-shadow:0 1px 3px rgba(0,0,0,.04);
}
.stat-card.alltime{background:linear-gradient(135deg,#e8f5e9,#f1f8e9)}
.stat-label{font-size:.82rem;color:var(--ink-muted);margin-bottom:8px}
.stat-value{font-size:1.8rem;font-weight:700}
.stat-value.income{color:#2e7d32}
.stat-value.expense{color:#c62828}
.stat-card.highlight{background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-color:#4caf50}
.stat-card.highlight .stat-value{font-size:2.2rem;color:#1b5e20}

/* Panel */
.panel{
  background:var(--surface);padding:24px;border-radius:var(--r);
  border:1px solid var(--border);margin-bottom:16px;
  box-shadow:0 1px 3px rgba(0,0,0,.04);
}
.panel h2{font-size:1.05rem;margin-bottom:16px;color:var(--green-dark)}
.sub{font-weight:400;font-size:.85rem;color:var(--ink-muted);margin-left:12px}

/* Inline Form */
.inline-form{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}
.inline-form input,.inline-form select{
  padding:9px 12px;border:1px solid var(--border);border-radius:var(--r);
  font-size:.9rem;font-family:var(--font);min-width:100px;
}
.inline-form input[type="date"]{min-width:140px}
.inline-form input:focus,.inline-form select:focus{
  outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(46,125,50,.1);
}

/* Buttons */
.btn{
  display:inline-block;padding:9px 20px;background:var(--green);
  color:#fff;border:none;border-radius:var(--r);font-size:.9rem;
  cursor:pointer;font-family:var(--font);transition:all .2s;
  text-decoration:none;
}
.btn:hover{background:var(--green-dark)}
.btn-sm{padding:5px 12px;font-size:.78rem}
.btn-danger{background:var(--red)}
.btn-danger:hover{background:#b71c1c}

/* Table */
table{width:100%;border-collapse:collapse}
th,td{padding:10px 12px;text-align:left;font-size:.9rem}
th{background:var(--green-pale);color:var(--green-dark);font-weight:600;font-size:.82rem}
td{border-bottom:1px solid var(--border)}
tr:hover td{background:#f9fbf9}
.empty{text-align:center;color:var(--ink-muted);padding:30px}
.row-income{border-left:3px solid var(--green)}
.row-expense{border-left:3px solid var(--red)}

/* Report */
pre{
  background:#1c1c1e;color:#a5d6a7;padding:20px 24px;border-radius:var(--r);
  font-size:.85rem;line-height:1.8;overflow-x:auto;white-space:pre-wrap;
  max-height:500px;overflow-y:auto;
}

/* Responsive */
@media(max-width:640px){
  header{flex-direction:column;align-items:flex-start;padding:12px 16px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-value{font-size:1.4rem}
  .inline-form input,.inline-form select{flex:1 1 100%}
}