:root{
  --bg:#0b0d12;
  --surface:#12161d;
  --surface2:#171c25;
  --surface3:#1e2632;
  --border:#283243;
  --text:#e7edf7;
  --muted:#8793a5;
  --accent:#67b7ff;
  --ok:#7df0a5;
  --warn:#ffc76b;
  --danger:#ff8b8b;
  --today:#18253d;
  --planner:#67b7ff;
  --lesson:#7df0a5;
  --payment:#ffc76b;
  --deadline:#ff8b8b;
  --shadow:0 12px 32px rgba(0,0,0,.24);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:linear-gradient(180deg,#0a0c11 0%, #0d1016 100%);color:var(--text);font-family:'DM Sans',sans-serif;font-size:14px;line-height:1.55;min-height:100vh}
button,input,select,textarea{font:inherit}
a{color:inherit}
.hidden{display:none!important}
.mono{font-family:'DM Mono',monospace}
header{padding:26px 30px 18px;border-bottom:1px solid var(--border);background:rgba(10,12,17,.88);backdrop-filter:blur(10px);position:sticky;top:0;z-index:40}
.head-wrap{display:flex;gap:16px;justify-content:space-between;align-items:flex-end;flex-wrap:wrap}
.h-left h1{font-family:'DM Serif Display',serif;font-size:2rem;line-height:1.08}
.h-left h1 em{color:var(--accent);font-style:italic}
.h-left p{margin-top:8px;color:var(--muted);font-size:12px}
.h-right{display:flex;gap:8px;flex-wrap:wrap}
.pill{background:var(--surface2);border:1px solid var(--border);border-radius:999px;padding:7px 12px;font-size:11px;color:var(--muted);font-family:'DM Mono',monospace}
.pill strong{color:var(--text);font-weight:600}
.top-alert{margin-top:12px;background:rgba(103,183,255,.08);border:1px solid rgba(103,183,255,.22);border-left:4px solid var(--accent);border-radius:12px;padding:12px 14px;color:#d7eaff;display:flex;gap:10px;align-items:flex-start}
.app-shell{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 115px)}
.sidebar{background:#0f141b;border-right:1px solid var(--border);padding:18px 14px;display:flex;flex-direction:column;gap:12px}
.sidebar h2{font-size:15px}
.nav a{display:block;padding:10px 12px;border-radius:10px;text-decoration:none;color:#cfd9e6;border:1px solid transparent}
.nav a:hover,.nav a.active{background:#1d2836;border-color:#39506d;color:#fff}
.sidebox{margin-top:auto;border:1px solid var(--border);border-radius:12px;padding:10px;background:#12161d;font-size:12px;color:#9aa8ba}
.main{padding:22px 24px 40px}
.section-title{font-family:'DM Serif Display',serif;font-size:1.25rem;margin-bottom:14px}
.hero{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;flex-wrap:wrap;margin-bottom:16px}
.hero h1{font-family:'DM Serif Display',serif;font-size:2rem}
.hero p{color:var(--muted);margin-top:6px}
.card{background:linear-gradient(180deg,var(--surface),#11161d);border:1px solid var(--border);border-radius:18px;padding:16px;box-shadow:var(--shadow)}
.card-title{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.card-title h3{font-size:14px;font-weight:800}
.card-sub{font-size:12px;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
.stat .k{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.stat .v{font-size:1.5rem;font-weight:800;margin-top:8px}
.stat .s{margin-top:6px;font-size:12px;color:var(--muted)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:18px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin-bottom:18px}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}
.btn{appearance:none;border:1px solid var(--border);background:var(--surface2);color:var(--text);padding:9px 12px;border-radius:12px;cursor:pointer;font-weight:700}
.btn:hover{background:var(--surface3)}
.btn.accent{background:rgba(103,183,255,.1);border-color:rgba(103,183,255,.26);color:#dff0ff}
.btn.danger{background:rgba(255,139,139,.08);border-color:rgba(255,139,139,.22);color:#ffd5d5}
.input,.select,.textarea{background:var(--surface2);border:1px solid var(--border);color:var(--text);border-radius:12px;padding:10px 11px}
.textarea{min-height:140px;width:100%;resize:vertical}
.fgroup{display:flex;flex-direction:column;gap:6px}
.fgroup label{font-size:12px;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.form-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.form-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.list{display:flex;flex-direction:column;gap:10px}
.item{border:1px solid var(--border);border-radius:14px;padding:11px 12px;background:rgba(255,255,255,.02)}
.item strong{display:block}
.item small{color:var(--muted)}
.table-wrap{overflow:auto;border-radius:14px;border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;min-width:900px;background:var(--surface)}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;font-size:13px;vertical-align:top}
th{background:var(--surface2);font-size:11px;text-transform:uppercase;color:var(--muted)}
tr:last-child td{border-bottom:none}
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 8px;border-radius:999px;border:1px solid var(--border);background:var(--surface2);font-size:11px;color:var(--muted)}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px}
.subject-card{padding:16px;border:1px solid var(--border);border-radius:16px;background:linear-gradient(180deg,var(--surface),#11161d)}
.subject-top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start;margin-bottom:10px}
.subject-name{font-size:15px;font-weight:800}
.small{font-size:11px;color:var(--muted)}
.bar{width:100%;height:8px;border-radius:999px;background:var(--surface3);overflow:hidden;border:1px solid rgba(255,255,255,.03)}
.fill{height:100%;border-radius:999px}
.todo{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.02)}
.todo.done{opacity:.62}.todo.done .todo-title{text-decoration:line-through}
.todo-title{font-size:13px;font-weight:700}
.todo-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}
.tag{font-size:10px;padding:3px 7px;border-radius:999px;font-weight:700;border:1px solid var(--border);background:var(--surface2);color:var(--muted)}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.login-card{width:min(440px,100%);background:linear-gradient(180deg,var(--surface),#10151b);border:1px solid var(--border);border-radius:22px;padding:24px;box-shadow:0 14px 40px rgba(0,0,0,.28)}
.login-card h1{font-family:'DM Serif Display',serif;font-size:2rem;line-height:1.1}.login-card p{margin-top:10px;color:var(--muted);font-size:13px}
.form{display:flex;flex-direction:column;gap:12px;margin-top:22px}.msg{margin-top:10px;color:#ffb5b5;font-size:13px;min-height:18px}
.month-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:8px}
.month-head{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;padding:4px 6px}
.month-cell{min-height:118px;border:1px solid var(--border);border-radius:14px;background:rgba(255,255,255,.02);padding:8px;display:flex;flex-direction:column;gap:6px}
.month-cell.out{opacity:.35}.month-cell.today{background:rgba(103,183,255,.08);border-color:rgba(103,183,255,.26)}
.month-day{font-family:'DM Mono',monospace;font-size:11px;color:var(--muted)}
.month-item{font-size:10px;padding:4px 6px;border-radius:8px;background:var(--surface2);border:1px solid var(--border);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.month-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.status-dot{display:inline-block;width:10px;height:10px;border-radius:50%}
.kpi{display:flex;flex-direction:column;gap:5px}.kpi .k{font-size:11px;color:var(--muted);text-transform:uppercase}.kpi .v{font-size:1.3rem;font-weight:800}
.editor-row{padding:12px;border:1px solid var(--border);border-radius:14px;background:rgba(255,255,255,.025)}
.editor-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.editor-head strong{font-size:13px}
.help{color:var(--muted);font-size:12px;margin-top:8px}
@media (max-width:1200px){.cards,.grid-2,.grid-3,.form-grid,.form-grid-2,.form-grid-3{grid-template-columns:1fr 1fr}}
@media (max-width:860px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;top:0;z-index:30;flex-direction:row;overflow:auto}.sidebox{display:none}.cards,.grid-2,.grid-3,.form-grid,.form-grid-2,.form-grid-3,.month-grid{grid-template-columns:1fr}.main{padding:18px}}