/* Base styles - variables, reset, layout */
:root{
  --bg:#0f1216;
  --panel:#171b21;
  --panel-2:#11151a;
  --text:#e9f1f1;
  --muted:#9fb0b2;
  --line:#26303a;
  --mint:#34f1c9;
  --mint-2:#5ff0d6;
  --danger:#ff6b6b;
  --accent:#24313a;
}

*{box-sizing:border-box}
html,body{height:100%}
html{color-scheme:dark}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

/* Background glow */
#bg-glow{
  position:fixed;
  top:-8vh; left:50%;
  transform:translateX(-50%);
  width:120vw; height:60vh;
  pointer-events:none;
  background:
    radial-gradient(60% 70% at 50% 0%, rgba(52,241,201,0.12), transparent 60%);
  filter: blur(12px);
  z-index:0;
}

/* Main layout */
.sidebar{
  position:fixed; inset:0 auto 0 0; width:210px; background:var(--panel-2);
  border-right:1px solid var(--line); padding:14px; z-index:1;
}

.brand{display:flex; gap:12px; align-items:center; margin-bottom:12px}
.brand-logo{width:28px;height:28px;display:block;border-radius:6px}
.brand-text small{color:#7f8ea3;opacity:.9;margin-left:6px}
.brand small{display:block; color:var(--muted); font-size:12px; margin-top:2px}

.nav-item{
  width:100%; padding:10px 12px; margin:6px 0; background:transparent; border:1px solid var(--line);
  border-radius:10px; color:var(--text); text-align:left; cursor:pointer;
}
.nav-item.active{outline:2px solid var(--mint);}
.nav-item:disabled{opacity:.5; cursor:not-allowed}

#app{ margin-left:210px; padding:24px; position:relative; z-index:1;}

/* Page header */
.page-header{ display:flex; align-items:center; justify-content:space-between; margin-bottom:12px;}
.page-header h1{ margin:0; font-size:22px;}
.actions{ display:flex; gap:10px; align-items:center}
.actions select,.actions input{ background:var(--panel-2); color:var(--text); border:1px solid var(--line); border-radius:10px; padding:8px 10px}

.divider {
  color: var(--muted);
  margin: 0 8px;
}

/* Page visibility */
section.page{ display:none; }
section.page.visible{ display:block; }

/* Cards */
.card{ background:var(--panel); border:1px solid var(--line); border-radius:14px; overflow:hidden}

/* Month navigation */
.month-nav{
  display:grid;
  grid-template-columns: 40px 200px 40px;
  align-items:center;
  justify-content:center;
  gap:14px;
  padding:10px 0 6px;
}
.month-btn{
  width:40px; height:40px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.08);
  background:#0f1419;
  display:grid;
  place-items:center;
  font-size:18px;
  line-height:1;
  cursor:pointer;
}
.month-btn:focus{ outline:2px solid var(--mint); outline-offset:2px; }
.month-label{
  width:200px;
  text-align:center;
  font-weight:600;
  font-size:18px;
  letter-spacing:0.3px;
}

/* Confirm modal */
.confirm-overlay{
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: grid; place-items: center; z-index: 9998;
}
.confirm-modal{
  background: #0f1419; border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px; padding: 16px; width: min(440px, 92vw);
  box-shadow: 0 10px 24px rgba(0,0,0,0.5);
}
.confirm-title{ font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.confirm-text{ color: var(--muted); margin-bottom: 16px; }
.confirm-actions{ display: flex; gap: 8px; justify-content: flex-end; }