:root{--brand:#4f46e5;--brand-dark:#4338ca;--bg:#f4f5fb;--card:#fff;--text:#1f2937;--muted:#6b7280;--border:#e5e7eb;--ok:#047857;--ok-bg:#ecfdf5;--err:#b91c1c;--err-bg:#fef2f2}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:var(--brand)}
.nav{background:var(--card);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1080px;margin:0 auto;padding:.75rem 1.25rem;display:flex;align-items:center;gap:1.25rem;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.15rem;color:var(--brand);text-decoration:none;letter-spacing:.02em}
.brand small{color:var(--muted);font-weight:500;margin-left:.35rem}
.nav-links{display:flex;gap:1rem;flex:1}
.nav-links a{color:var(--muted);text-decoration:none;font-weight:500;padding:.25rem 0;border-bottom:2px solid transparent}
.nav-links a.active,.nav-links a:hover{color:var(--text);border-color:var(--brand)}
.nav-user{display:flex;align-items:center;gap:.75rem;color:var(--muted);font-size:.9rem}
.badge{display:inline-block;padding:.1rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600;background:#eef2ff;color:var(--brand-dark);text-transform:capitalize}
.container{max-width:1080px;margin:2rem auto;padding:0 1.25rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.75rem;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:1.25rem}
.tile{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.1rem}
.tile h3{margin:0 0 .25rem;font-size:1rem}
.tile p{margin:0;color:var(--muted);font-size:.9rem}
.muted{color:var(--muted)}
h1{margin:0 0 .35rem;font-size:1.6rem}
.btn{display:inline-block;border:0;border-radius:8px;padding:.6rem 1.1rem;font-weight:600;font-size:.95rem;cursor:pointer;background:var(--brand);color:#fff;text-decoration:none}
.btn:hover{background:var(--brand-dark)}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--border);padding:.4rem .8rem;font-size:.85rem}
.btn-ghost:hover{background:#f9fafb;color:var(--text)}
.btn-block{width:100%}
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem}
.auth-card{width:100%;max-width:420px}
.auth-brand{text-align:center;margin-bottom:1.25rem}
.auth-brand .brand{font-size:1.6rem}
.auth-brand p{margin:.25rem 0 0;color:var(--muted)}
.field{margin-bottom:1rem}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.35rem}
.field input,.field select{width:100%;padding:.6rem .75rem;border:1px solid var(--border);border-radius:8px;font-size:.95rem;background:#fff}
.field input:focus,.field select:focus{outline:2px solid #c7d2fe;border-color:var(--brand)}
.check{display:flex;align-items:center;gap:.5rem;font-size:.9rem}
.row{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.alert{padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.92rem}
.alert-ok{background:var(--ok-bg);color:var(--ok)}
.alert-err{background:var(--err-bg);color:var(--err)}
.alert-err ul{margin:0;padding-left:1.1rem}
.footer-link{text-align:center;margin-top:1rem;font-size:.9rem;color:var(--muted)}
dl.meta{display:grid;grid-template-columns:max-content 1fr;gap:.4rem 1.25rem;margin:1.25rem 0 0}
dl.meta dt{color:var(--muted)}
dl.meta dd{margin:0;font-weight:500}

/* —— App shell (student / teacher / parent / ticket pages) —— */
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:color-mix(in srgb, var(--card) 88%, transparent);border-bottom:1px solid var(--border)}
.topbar-inner{max-width:1120px;margin:0 auto;padding:.7rem 1.25rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.brand-lockup{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--text);min-width:max-content}
.brand-mark{width:36px;height:36px;border-radius:10px;display:block;box-shadow:0 4px 12px rgba(15,23,42,.18)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:1.05rem;font-weight:800;letter-spacing:.01em}
.brand-text small{color:var(--muted);font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.primary-nav{display:flex;align-items:center;gap:.35rem;flex:1;flex-wrap:wrap}
.nav-link{display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .75rem;border-radius:999px;text-decoration:none;color:var(--muted);font-weight:600;font-size:.9rem;border:1px solid transparent;transition:background .15s,color .15s,border-color .15s}
.nav-link:hover{color:var(--text);background:color-mix(in srgb, var(--brand) 10%, transparent)}
.nav-link.is-active{color:var(--text);background:color-mix(in srgb, var(--brand) 16%, transparent);border-color:color-mix(in srgb, var(--brand) 35%, transparent)}
.nav-link--accent{color:var(--brand-dark)}
.nav-link--muted{font-weight:500;font-size:.82rem;opacity:.9}
.nav-ico{font-size:.95rem;line-height:1}
.nav-more{display:flex;align-items:center;gap:.15rem;margin-left:.25rem;padding-left:.35rem;border-left:1px solid var(--border)}
.topbar-actions{display:flex;align-items:center;gap:.65rem;margin-left:auto}
.user-chip{display:flex;align-items:center;gap:.55rem;font-size:.88rem;color:var(--muted)}
.user-chip__name{font-weight:600;color:var(--text);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.logout-form{display:inline}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--card);padding:10px 9px;cursor:pointer;flex-direction:column;justify-content:space-between}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text)}
.app-footer{margin-top:auto;border-top:1px solid var(--border);padding:1rem 1.25rem;color:var(--muted);font-size:.85rem}
.app-footer-inner{max-width:1120px;margin:0 auto;display:flex;gap:1rem;flex-wrap:wrap;align-items:center;justify-content:space-between}
.app-footer a{color:var(--muted);text-decoration:none;font-weight:500}
.app-footer a:hover{color:var(--text)}

/* Ticket pages */
.ticket-page{display:flex;flex-direction:column;gap:1rem}
.ticket-hero{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;flex-wrap:wrap}
.ticket-hero h1{margin:0}
.eyebrow{margin:0 0 .35rem;font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.ticket-form-card{padding:1.5rem 1.75rem}
.ticket-form .form-grid{margin-bottom:.5rem}
.ticket-form .field{margin-bottom:0}
.ticket-form .field .optional,.ticket-meta{color:var(--muted);font-weight:500;font-size:.82rem}
.ticket-meta{display:flex;flex-wrap:wrap;gap:.75rem 1.25rem;padding:.85rem 0 1rem;border-top:1px solid var(--border);margin-top:.5rem}
.ticket-actions{display:flex;gap:.65rem;flex-wrap:wrap;align-items:center}
.ticket-body{white-space:pre-wrap;margin-top:.75rem;line-height:1.65}
.ticket-reply{border-left:3px solid #64748b;padding:.55rem .85rem;margin:.65rem 0;border-radius:0 10px 10px 0;background:color-mix(in srgb, var(--card) 70%, transparent)}
.ticket-reply--admin{border-left-color:#14b8a6;background:color-mix(in srgb, #14b8a6 8%, var(--card))}
.table-wrap{overflow-x:auto}
.field input[type=file]{padding:.45rem;font-size:.85rem}

@media(max-width:900px){
  .nav-toggle{display:flex}
  .primary-nav{display:none;width:100%;order:5;flex-direction:column;align-items:stretch;padding:.35rem 0 .5rem;border-top:1px solid var(--border)}
  .primary-nav.is-open{display:flex}
  .nav-more{margin:0;padding:.35rem 0 0;border-left:0;border-top:1px solid var(--border);flex-wrap:wrap}
  .topbar-actions{margin-left:0}
  .user-chip__name{display:none}
  .container{margin:1.15rem auto}
}