/* ============================================================
   Lavrentev Cabinet — светлая тема
   ============================================================ */
:root{
  --bg:#f7f8fa;
  --surface:#ffffff;
  --ink:#1a1d24;
  --muted:#6b7280;
  --border:#e6e8ec;
  --accent:#4f7cff;
  --accent-soft:#eef2ff;
  --green:#22c55e;
  --red:#ef4444;
  --amber:#f59e0b;
  --radius:14px;
  --shadow:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --shadow-lg:0 10px 30px rgba(16,24,40,.10);
  --sidebar-w:248px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.5;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}

/* ---------- layout ---------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar-w);flex-shrink:0;background:var(--surface);
  border-right:1px solid var(--border);display:flex;flex-direction:column;
  position:fixed;top:0;bottom:0;left:0;z-index:40;
}
.sidebar__logo{display:flex;align-items:center;gap:10px;padding:20px 22px;font-weight:700;font-size:18px;border-bottom:1px solid var(--border)}
.sidebar__logo img{height:30px;width:auto}
.sidebar__nav{flex:1;padding:12px 12px;display:flex;flex-direction:column;gap:2px;overflow-y:auto}
.nav-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:10px;color:var(--muted);font-weight:500;font-size:15px;transition:background .15s,color .15s}
.nav-item:hover{background:var(--bg);color:var(--ink)}
.nav-item.is-active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav-item__icon{width:22px;text-align:center;font-size:16px}
.sidebar__foot{padding:16px 22px;border-top:1px solid var(--border)}
.sidebar__user{font-weight:600;font-size:14px;margin-bottom:4px}
.sidebar__logout{font-size:13px;color:var(--muted)}
.sidebar__logout:hover{color:var(--red)}

.content{flex:1;margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:14px;padding:18px 32px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:30}
.topbar__title{font-size:20px;font-weight:700}
.topbar__burger{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--ink)}
.page{padding:32px;flex:1}

/* ---------- cards ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card h2{font-size:18px;margin-bottom:8px}
.muted{color:var(--muted)}

/* ---------- dashboard grid ---------- */
.dash-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.widget__head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.widget__icon{width:34px;height:34px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);border-radius:9px;font-size:16px}
.widget h3{font-size:15px;font-weight:600}
.widget__link{display:inline-block;margin-top:14px;font-size:13px;color:var(--accent);font-weight:600}
.stat-big{font-size:34px;font-weight:800;letter-spacing:-.5px}
.widget--stat .stat-big{margin:4px 0}

.lesson-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.lesson-list li{display:flex;align-items:center;gap:10px;font-size:14px}
.lesson-list b{min-width:42px}
.dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}

.badge{font-size:11px;padding:2px 9px;border-radius:999px;font-weight:600;text-transform:capitalize}
.badge--planned{background:#eef2ff;color:#4f7cff}
.badge--done{background:#ecfdf3;color:#16a34a}
.badge--cancelled{background:#fef2f2;color:#dc2626}
.badge--moved{background:#fffbeb;color:#d97706}

.task-mini{list-style:none;display:flex;flex-direction:column;gap:9px}
.task-mini li{display:flex;align-items:center;gap:10px;font-size:14px}
.task-mini .check{width:16px;height:16px;border:2px solid var(--border);border-radius:5px;flex-shrink:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--ink);font-weight:600;font-size:14px;cursor:pointer;transition:all .15s}
.btn:hover{background:var(--bg)}
.btn--primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn--primary:hover{background:#3d68f0}
.btn--full{width:100%;justify-content:center}

/* ---------- login ---------- */
.login-body{display:grid;place-items:center;min-height:100vh;background:linear-gradient(135deg,#eef2ff,#f7f8fa)}
.login-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:44px 38px;width:100%;max-width:380px;box-shadow:var(--shadow-lg);text-align:center}
.login-logo img{height:46px;margin-bottom:18px}
.login-title{font-size:24px;font-weight:800}
.login-sub{color:var(--muted);font-size:14px;margin-bottom:26px}
.login-form{display:flex;flex-direction:column;gap:16px;text-align:left}
.login-form label{font-size:13px;font-weight:600;color:var(--muted);display:flex;flex-direction:column;gap:6px}
.login-form input{padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:15px;color:var(--ink);transition:border .15s}
.login-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.login-error{background:#fef2f2;color:#dc2626;padding:10px 14px;border-radius:10px;font-size:14px;margin-bottom:16px}

/* ---------- mobile ---------- */
@media(max-width:860px){
  .sidebar{transform:translateX(-100%);transition:transform .25s}
  .sidebar.is-open{transform:translateX(0);box-shadow:var(--shadow-lg)}
  .content{margin-left:0}
  .topbar__burger{display:block}
  .page{padding:20px}
}