:root{
    --bg: #0b1020;
    --panel: rgba(255,255,255,.06);
    --panel2: rgba(255,255,255,.10);
    --text: rgba(255,255,255,.92);
    --muted: rgba(255,255,255,.65);
    --border: rgba(255,255,255,.10);
    --brand: #6ea8ff;
    --brand2:#7c3aed;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --radius: 16px;
    --radius2: 20px;
    --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  }
  
  html[data-theme="light"]{
    --bg: #f6f7fb;
    --panel: rgba(0,0,0,.04);
    --panel2: rgba(0,0,0,.06);
    --text: rgba(10,12,18,.92);
    --muted: rgba(10,12,18,.62);
    --border: rgba(10,12,18,.10);
    --brand: #2563eb;
    --brand2:#7c3aed;
    --shadow: 0 12px 30px rgba(10,12,18,.10);
  }
  
  *{ box-sizing: border-box; }
  body{
    margin:0;
    font-family: var(--font);
    color: var(--text);
    background: radial-gradient(1200px 700px at 20% 10%, rgba(124,58,237,.25), transparent 55%),
                radial-gradient(900px 600px at 70% 0%, rgba(110,168,255,.20), transparent 55%),
                var(--bg);
    min-height: 100vh;
  }
  
  a{ color: inherit; text-decoration: none; }
  a:hover{ text-decoration: underline; }
  
  .container{
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 18px;
  }
  
  .topbar{
    display:flex;
    justify-content: space-between;
    align-items:center;
    gap:12px;
    margin-bottom: 18px;
  }
  
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
  }
  .brand-badge{
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brand2), var(--brand));
    box-shadow: var(--shadow);
  }
  .brand h1{
    font-size: 18px;
    margin:0;
    letter-spacing: .2px;
  }
  .brand p{
    margin:2px 0 0;
    font-size: 12px;
    color: var(--muted);
  }
  
  .btn{
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 12px;
    cursor: pointer;
    display:inline-flex;
    gap:8px;
    align-items:center;
    transition: transform .05s ease, background .15s ease, border-color .15s ease;
  }
  .btn:hover{ background: var(--panel2); }
  .btn:active{ transform: translateY(1px); }
  .btn-primary{
    background: linear-gradient(135deg, rgba(124,58,237,.85), rgba(37,99,235,.85));
    border-color: rgba(255,255,255,.18);
  }
  html[data-theme="light"] .btn-primary{
    border-color: rgba(10,12,18,.12);
  }
  
  .card{
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius2);
    box-shadow: var(--shadow);
  }
  
  .card-inner{ padding: 18px; }
  
  .form{
    display:grid;
    gap: 12px;
  }
  .input{
    width: 100%;
    padding: 12px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.05);
    color: var(--text);
    outline: none;
  }
  html[data-theme="light"] .input{ background: rgba(0,0,0,.02); }
  .input:focus{ border-color: rgba(110,168,255,.55); }
  
  .hint{
    font-size: 12px;
    color: var(--muted);
  }
  
  .alert{
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(255, 80, 80, .35);
    background: rgba(255, 80, 80, .12);
    color: var(--text);
  }
  
  .calendar-head{
    display:flex;
    justify-content: space-between;
    align-items:flex-end;
    gap:12px;
    margin: 18px 0 14px;
  }
  .calendar-title{
    margin:0;
    font-size: 20px;
  }
  .calendar-sub{
    margin:4px 0 0;
    color: var(--muted);
    font-size: 12px;
  }
  
  .grid{
    display:grid;
    gap: 12px;
    grid-template-columns: repeat(7, 1fr);
  }
  @media (max-width: 980px){
    .grid{ grid-template-columns: repeat(4, 1fr); }
  }
  @media (max-width: 640px){
    .grid{ grid-template-columns: repeat(2, 1fr); }
  }
  
  .day{
    min-height: 110px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 12px;
    display:flex;
    flex-direction: column;
    gap: 10px;
  }
  .day-top{
    display:flex;
    justify-content: space-between;
    align-items:center;
  }
  .day-num{
    font-weight: 700;
    letter-spacing: .2px;
  }
  .tag{
    font-size: 11px;
    padding: 5px 8px;
    border-radius: 999px;
    border: 1px solid var(--border);
    color: var(--muted);
  }
  .tag-ok{
    color: rgba(200,255,220,.9);
    border-color: rgba(60, 200, 120, .35);
    background: rgba(60, 200, 120, .10);
  }
  html[data-theme="light"] .tag-ok{
    color: rgba(12,110,60,.9);
    background: rgba(16,185,129,.10);
  }
  
  .file{
    display:flex;
    flex-direction: column;
    gap: 8px;
    margin-top:auto;
  }
  .file-name{
    font-size: 12px;
    color: var(--muted);
    word-break: break-all;
  }
  .file-actions{
    display:flex;
    gap:8px;
  }
  .btn-sm{
    padding: 8px 10px;
    border-radius: 10px;
    font-size: 12px;
  }