:root{
  --bg:#eef2f9; --card:#ffffff; --ink:#0f172a; --muted:#64748b;
  --primary:#1d4ed8; --primary-600:#1e40af; --primary-050:#eff4ff;
  --line:#e6ebf3; --ok:#16a34a; --warn:#d97706; --danger:#dc2626; --leave:#7c3aed;
  --radius:16px; --shadow:0 6px 20px rgba(15,23,42,.06); --shadow-lg:0 10px 30px rgba(15,23,42,.10);
  --hdr:58px; --bnav:64px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,sans-serif;
  background:var(--bg); color:var(--ink); -webkit-font-smoothing:antialiased;
  padding-top:var(--hdr); padding-bottom:calc(var(--bnav) + env(safe-area-inset-bottom));
}
a{text-decoration:none;color:inherit}
::selection{background:var(--primary);color:#fff}

/* ---------- Header ---------- */
.app-header{position:fixed;top:0;left:0;right:0;height:var(--hdr);z-index:1030;
  background:linear-gradient(120deg,var(--primary),var(--primary-600));color:#fff;box-shadow:0 2px 12px rgba(29,78,216,.28)}
.app-header-inner{max-width:760px;margin:0 auto;height:100%;display:flex;align-items:center;gap:12px;padding:0 14px}
.hdr-btn{width:40px;height:40px;border:0;border-radius:12px;background:rgba(255,255,255,.15);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:1.05rem;flex:0 0 auto;transition:background .2s}
.hdr-btn:hover{background:rgba(255,255,255,.28);color:#fff}
.app-brand{display:flex;align-items:center;gap:10px;flex:1;min-width:0}
.brand-badge{width:34px;height:34px;border-radius:10px;background:#fff;color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:1rem;flex:0 0 auto}
.brand-badge.lg{width:46px;height:46px;font-size:1.2rem}
.brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand-text strong{font-size:.98rem;font-weight:700}
.brand-text small{font-size:.7rem;opacity:.85;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- Drawer ---------- */
.nav-drawer{max-width:300px}
.nav-drawer .offcanvas-header{background:var(--primary-050)}
.drawer-user{display:flex;align-items:center;gap:12px}
.drawer-user .brand-badge{background:var(--primary);color:#fff}
.drawer-user strong{display:block;font-size:.95rem}
.drawer-user small{color:var(--muted);font-size:.72rem}
.offcanvas-body{padding:10px}
.nav-item{display:flex;align-items:center;gap:14px;padding:13px 14px;border-radius:12px;color:var(--ink);
  font-weight:500;font-size:.92rem;margin-bottom:2px;transition:background .18s,color .18s}
.nav-item i:first-child{width:20px;text-align:center;color:var(--muted)}
.nav-item .chev{margin-left:auto;font-size:.7rem;color:#cbd5e1}
.nav-item:hover{background:#f1f5fb}
.nav-item.active{background:var(--primary);color:#fff}
.nav-item.active i{color:#fff}
.nav-item.danger{color:var(--danger)} .nav-item.danger i{color:var(--danger)}

/* ---------- Main ---------- */
.app-main{max-width:760px;margin:0 auto;padding:16px 14px 28px}
.page-title{font-size:1.25rem;font-weight:800;margin:2px 0 4px}
.page-sub{color:var(--muted);font-size:.82rem;margin-bottom:16px}

/* ---------- Cards ---------- */
.card-soft{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:14px}
.card-soft.p0{padding:0;overflow:hidden}

/* Dashboard quick grid */
.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:18px}
.quick-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:16px;display:flex;flex-direction:column;gap:10px;transition:transform .15s,box-shadow .15s;position:relative;overflow:hidden}
.quick-card:active{transform:scale(.98)}
.quick-card:hover{box-shadow:var(--shadow-lg)}
.qc-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.15rem;color:#fff}
.qc-title{font-weight:700;font-size:.95rem}
.qc-sub{color:var(--muted);font-size:.75rem}
.bg-blue{background:linear-gradient(135deg,#2563eb,#1d4ed8)}
.bg-green{background:linear-gradient(135deg,#16a34a,#15803d)}
.bg-amber{background:linear-gradient(135deg,#f59e0b,#d97706)}
.bg-violet{background:linear-gradient(135deg,#8b5cf6,#7c3aed)}
.bg-rose{background:linear-gradient(135deg,#f43f5e,#e11d48)}
.bg-cyan{background:linear-gradient(135deg,#06b6d4,#0891b2)}

/* Stat strip */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:18px}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.stat-num{font-size:1.5rem;font-weight:800;line-height:1}
.stat-lbl{color:var(--muted);font-size:.74rem;margin-top:4px}
.section-label{font-size:.78rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin:6px 2px 10px}

/* ---------- Forms ---------- */
.form-label{font-weight:600;font-size:.82rem;margin-bottom:6px;color:#334155}
.form-control,.form-select{border-radius:12px;border:1.5px solid var(--line);padding:12px 14px;font-size:.95rem;min-height:50px}
.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(29,78,216,.12)}
textarea.form-control{min-height:110px}
.btn{border-radius:12px;font-weight:700;padding:12px 18px;font-size:.95rem}
.btn-lg-touch{min-height:52px;font-size:1rem}
.btn-primary{background:var(--primary);border-color:var(--primary)}
.btn-primary:hover,.btn-primary:active{background:var(--primary-600);border-color:var(--primary-600)}
.btn-soft{background:var(--primary-050);color:var(--primary);border:1.5px solid #dbe6ff}
.btn-soft:hover{background:#e2ecff;color:var(--primary-600)}
.filter-actions{display:flex;gap:10px}

/* ---------- Student attendance cards ---------- */
.stu-card{display:flex;gap:12px;align-items:center;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:12px;margin-bottom:10px;box-shadow:var(--shadow)}
.stu-avatar{position:relative;width:46px;height:46px;border-radius:50%;background:var(--primary-050);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem;flex:0 0 auto;overflow:hidden}
.stu-avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.stu-info{flex:1;min-width:0}
.stu-name{font-weight:700;font-size:.92rem}
.stu-meta{color:var(--muted);font-size:.74rem}
.stu-adm{display:inline-block;background:#f1f5fb;color:#475569;border-radius:6px;padding:1px 7px;font-size:.68rem;font-weight:600;margin-bottom:2px}
.att-select{max-width:130px;min-height:44px;font-weight:700;border-radius:10px}
.att-select.s-Present{color:var(--ok);border-color:#bbf7d0;background:#f0fdf4}
.att-select.s-Absent{color:var(--danger);border-color:#fecaca;background:#fef2f2}
.att-select.s-Leave{color:var(--leave);border-color:#ddd6fe;background:#f5f3ff}
.att-select.s-Holiday{color:var(--warn);border-color:#fde68a;background:#fffbeb}

.toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0 12px}
.count-pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.78rem;font-weight:700;box-shadow:var(--shadow)}

/* Sticky action bar */
.sticky-actions{position:fixed;left:0;right:0;bottom:calc(var(--bnav) + env(safe-area-inset-bottom));z-index:1020;
  background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:10px 14px}
.sticky-actions .inner{max-width:760px;margin:0 auto}

/* ---------- List cards (homework/assignment/notice) ---------- */
.list-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-bottom:12px}
.lc-head{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:5px;background:var(--primary-050);color:var(--primary);
  border-radius:999px;padding:4px 10px;font-size:.72rem;font-weight:700}
.chip.gray{background:#f1f5fb;color:#475569}
.chip.date{background:#ecfdf5;color:#047857}
.lc-note{font-size:.9rem;line-height:1.5;color:#334155;white-space:pre-line;word-break:break-word}
.lc-note.clamp{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.lc-actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.lc-actions .btn{padding:8px 14px;font-size:.82rem;flex:1;min-width:110px}
.status-dot{font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:999px}
.status-dot.active{background:#dcfce7;color:#166534}
.status-dot.inactive{background:#fee2e2;color:#991b1b}

/* ---------- Alerts / states ---------- */
.banner{border-radius:12px;padding:12px 14px;font-size:.85rem;font-weight:600;display:flex;gap:10px;align-items:center;margin-bottom:14px}
.banner.info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}
.banner.warn{background:#fffbeb;color:#92400e;border:1px solid #fde68a}
.empty{text-align:center;padding:40px 16px;color:var(--muted)}
.empty i{font-size:2.4rem;color:#cbd5e1;margin-bottom:10px}
.skel{background:linear-gradient(90deg,#eef2f9 25%,#e2e8f0 37%,#eef2f9 63%);background-size:400% 100%;
  animation:sh 1.3s ease infinite;border-radius:14px;height:70px;margin-bottom:10px}
@keyframes sh{0%{background-position:100% 0}100%{background-position:-100% 0}}

/* ---------- Toast ---------- */
.toast-stack{position:fixed;top:calc(var(--hdr) + 8px);left:0;right:0;z-index:1080;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none;padding:0 14px}
.toast-msg{max-width:520px;width:100%;background:#fff;border-left:4px solid var(--primary);border-radius:12px;
  box-shadow:var(--shadow-lg);padding:12px 14px;font-size:.86rem;font-weight:600;display:flex;gap:10px;align-items:center;
  animation:slideIn .25s ease;pointer-events:auto}
.toast-msg.ok{border-left-color:var(--ok)} .toast-msg.ok i{color:var(--ok)}
.toast-msg.err{border-left-color:var(--danger)} .toast-msg.err i{color:var(--danger)}
.toast-msg.info i{color:var(--primary)}
@keyframes slideIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* Confirm modal */
.confirm-card{border:0;border-radius:18px;text-align:center}
.confirm-card .modal-body{padding:22px 22px 6px}
.confirm-icon{width:56px;height:56px;border-radius:50%;background:#fff7ed;color:var(--warn);
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin:0 auto 12px}
.confirm-card .modal-footer{border:0;gap:10px;padding:16px 22px 22px}

/* Bottom nav */
.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--bnav) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);z-index:1030;background:#fff;border-top:1px solid var(--line);
  display:flex;box-shadow:0 -4px 16px rgba(15,23,42,.06)}
.bottom-nav .bn-item{flex:1;border:0;background:none;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;color:var(--muted);font-size:.66rem;font-weight:600;padding:6px 2px}
.bottom-nav .bn-item i{font-size:1.15rem}
.bottom-nav .bn-item.active{color:var(--primary)}

/* Loading overlay */
#loadOverlay{position:fixed;inset:0;background:rgba(255,255,255,.6);backdrop-filter:blur(2px);z-index:2000;
  display:none;align-items:center;justify-content:center}
#loadOverlay.show{display:flex}
.spinner{width:44px;height:44px;border:4px solid #dbe6ff;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.btn-loading{position:relative;pointer-events:none;opacity:.85}
.btn-loading .lbl{visibility:hidden}
.btn-loading::after{content:"";position:absolute;inset:0;margin:auto;width:18px;height:18px;border:2.5px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}

/* ---------- Login ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(1200px 600px at 50% -10%,#3b82f6 0%,#1d4ed8 45%,#1e3a8a 100%)}
.login-card{width:100%;max-width:380px;background:#fff;border-radius:22px;box-shadow:0 24px 60px rgba(2,6,23,.35);padding:28px 24px}
.login-logo{width:64px;height:64px;border-radius:18px;background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin:0 auto 14px;box-shadow:0 10px 22px rgba(29,78,216,.4)}
.login-card h1{font-size:1.35rem;font-weight:800;text-align:center;margin:0}
.login-card .sub{text-align:center;color:var(--muted);font-size:.82rem;margin:4px 0 22px}
.input-icon{position:relative}
.input-icon i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:#94a3b8}
.input-icon .form-control{padding-left:42px}

@media(min-width:600px){ .quick-grid{grid-template-columns:repeat(4,1fr)} .stat-grid{grid-template-columns:repeat(4,1fr)} }