:root{
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #60a5fa;
  --grid: #1f2937;
  --today: #22c55e;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --chip: #0b1330;
}

*{box-sizing:border-box}

html,body{
  height:100%;
  margin:0;
  background: radial-gradient(1200px 800px at 10% -10%, #1e293b 0, #0b1220 60%, #060a13 100%);
  color:var(--text);
  font: 16px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial;
}

.app-header{
  position:sticky; top:0; z-index:10;
  backdrop-filter: saturate(140%) blur(6px);
  background: rgba(15,23,42,.6);
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 14px clamp(12px, 3vw, 24px);
}
.app-header h1{ margin: 0 0 8px; font-size: clamp(18px, 2vw, 22px); letter-spacing:.2px; }

.controls{
  display:flex; gap:12px; align-items:center; justify-content:space-between; flex-wrap:wrap;
}
.nav, .view-switch{ display:flex; gap:8px; }

button{
  border:1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, #111827, #0b1220);
  color:var(--text);
  padding:10px 12px;
  border-radius:10px;
  cursor:pointer;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
}
button:hover{ transform: translateY(-1px); border-color: rgba(255,255,255,.16); }
button:active{ transform: translateY(0); }
.view-switch button.active{
  background: linear-gradient(180deg, #1f2937, #0e1729);
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(96,165,250,.2), 0 6px 16px rgba(2,132,199,.2);
}
.current-range{ margin-top:10px; color:var(--muted); font-size:.95rem; }

/* Calendar surface */
.calendar{
  margin: 20px auto;
  width:min(1100px, 95vw);
  background: linear-gradient(180deg, #0c1424, #0a1220);
  border:1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}

/* Month view */
.month-grid{ display:grid; grid-template-rows: auto 1fr; }
.weekdays{
  display:grid; grid-template-columns: repeat(7, 1fr); gap:1px; background: var(--grid); border-bottom:1px solid var(--grid);
}
.weekdays div{
  padding:10px 6px; text-align:center; font-weight:600; color: var(--muted);
  background: linear-gradient(180deg, #101826, #0c1424);
}
.days{ display:grid; grid-template-columns: repeat(7, 1fr); gap:1px; background: var(--grid); }
.cell{
  min-height: 120px;
  background: linear-gradient(180deg, #0e1729, #0a1220);
  padding:8px;
  position:relative;
  cursor:pointer;
}
.cell .date-badge{
  position:absolute; top:6px; right:8px; font-size:.9rem; color:var(--muted);
}
.cell.other-month .date-badge{ opacity:.35; }
.cell.today{
  outline: 2px solid var(--today);
  outline-offset:-2px;
  box-shadow: inset 0 0 0 2px rgba(34,197,94,.15);
}
.cell.today .date-badge{ color: var(--today); }

.events{
  margin-top:26px; display:flex; flex-direction:column; gap:6px;
}
.event-chip{
  display:block; width:100%;
  background: linear-gradient(180deg, #0e1430, #0b1226);
  border:1px solid rgba(96,165,250,.25);
  border-left:3px solid var(--accent);
  padding:6px 8px; border-radius:8px;
  font-size:.85rem; color:#dbeafe; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}

/* Week view */
.week-view{ display:grid; grid-template-rows: auto 1fr; }
.week-head{ display:grid; grid-template-columns: 80px repeat(7, 1fr); border-bottom:1px solid var(--grid); }
.week-head div{ padding:10px; text-align:center; color:var(--muted); background: linear-gradient(180deg, #101826, #0c1424); border-right:1px solid var(--grid); }
.week-head div:last-child{ border-right:none; }
.week-grid{ display:grid; grid-template-columns: 80px repeat(7, 1fr); height: 640px; position:relative; }
.hour-col{ border-right:1px solid var(--grid); background: linear-gradient(180deg, #0c1424, #0a1220); }
.hour{ height:40px; padding:4px 6px; color:var(--muted); font-size:.85rem; border-bottom:1px dashed rgba(255,255,255,.06); }
.day-col{ border-right:1px solid var(--grid);
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(255,255,255,.04),
      rgba(255,255,255,.04) 1px,
      transparent 1px,
      transparent 40px
    );
  cursor:pointer;
}
.day-col:last-child{ border-right:none; }
.now-line{
  position:absolute; left:80px; right:0; height:2px; background: var(--today); box-shadow: 0 0 10px rgba(34,197,94,.7);
}

/* Day view */
.day-view{ display:grid; grid-template-columns: 100px 1fr; min-height: 500px; border-top:1px solid var(--grid); position:relative; }
.day-hours{ border-right:1px solid var(--grid); background: linear-gradient(180deg, #0c1424, #0a1220); }
.day-hours .hour{ height:44px; }
.day-slots{
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(255,255,255,.04),
      rgba(255,255,255,.04) 1px,
      transparent 1px,
      transparent 44px
    );
  position:relative;
}
.day-now-line{
  position:absolute; left:100px; right:0; height:2px; background: var(--today); box-shadow: 0 0 10px rgba(34,197,94,.7);
}

/* Modal */
.modal{
  border:none; padding:0; border-radius: 14px; box-shadow: var(--shadow);
  width:min(520px, 92vw); background: #0b1220; color: var(--text);
}
.modal::backdrop{ background: rgba(0,0,0,.55); backdrop-filter: blur(2px); }
#event-form{ padding:18px; }
#event-form h2{ margin:0 0 4px; font-size:1.15rem; }
.modal-date{ margin:0 0 14px; color:var(--muted); font-size:.95rem; }
.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:12px; }
.field input, .field textarea{
  background:#0b1226; color:var(--text); border:1px solid rgba(255,255,255,.08);
  border-radius:10px; padding:10px 12px; outline:none;
}
.field input:focus, .field textarea:focus{ border-color: var(--accent); box-shadow: 0 0 0 2px rgba(96,165,250,.2) inset; }
.grid2{ display:grid; grid-template-columns: 1fr 1fr; gap:10px; }
.actions{ display:flex; justify-content:flex-end; gap:10px; margin-top:6px; }
.btn{ padding:10px 12px; border-radius:10px; border:1px solid rgba(255,255,255,.12); cursor:pointer; }
.btn.ghost{ background: #0a1120; color: var(--text); }
.btn.primary{ background: #0d1b36; border-color: var(--accent); }
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); }

/* Responsive tweaks */
@media (max-width: 700px){
  .week-head div span.long { display:none; }
  .week-head div span.short { display:inline; }
}
@media (min-width: 701px){
  .week-head div span.short { display:none; }
  .week-head div span.long { display:inline; }
}

.app-footer{ margin: 18px 0 40px; text-align:center; color:var(--muted); }