@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500;600;700&family=Inter:wght@400;500;600;700&family=Roboto+Mono:wght@500;600&display=swap');

:root{
  /* Institutional palette: deep academic green + graduation gold.
     Deliberately not the generic AI cream/terracotta pairing. */
  --ink:#182b23;
  --green-900:#0f3d2e;
  --green-800:#14532d;
  --green-700:#1c6b3f;
  --gold:#c9962c;
  --gold-dark:#a5791c;
  --paper:#f6f4ee;
  --surface:#ffffff;
  --line:#e6e2d6;
  --text:#20241f;
  --muted:#6b7061;
  --danger:#b3261e;
  --warning:#b06a06;
  --success:#1c6b3f;
  --info:#1d4ed8;
  --radius:12px;
  --sidebar-w:250px;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  background:var(--paper);
  font-family:'Inter',system-ui,Arial,sans-serif;
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{font-family:'Poppins',system-ui,sans-serif;font-weight:600;color:var(--ink);}
a{color:var(--green-700);}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;}

/* ---------- App shell: sidebar + content ---------- */
.app-shell{display:flex;min-height:100vh;}

.sidebar{
  width:var(--sidebar-w);
  flex-shrink:0;
  background:linear-gradient(180deg,var(--green-900),var(--green-800) 70%);
  color:#eaf3ec;
  display:flex;
  flex-direction:column;
  position:sticky;
  top:0;
  height:100vh;
  overflow-y:auto;
  z-index:40;
}
.sidebar-brand{
  display:flex;align-items:center;gap:10px;
  padding:20px 18px 14px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.sidebar-brand .mark{
  width:38px;height:38px;border-radius:10px;background:var(--gold);
  display:flex;align-items:center;justify-content:center;color:var(--green-900);
  font-family:'Poppins',sans-serif;font-weight:700;font-size:1.1rem;flex-shrink:0;
}
.sidebar-brand .name{font-family:'Poppins',sans-serif;font-weight:600;font-size:.95rem;line-height:1.2;}
.sidebar-brand .sub{font-size:.7rem;color:#bcd6c4;letter-spacing:.03em;}

.sidebar-cta{margin:16px 14px;}
.sidebar-cta a{
  display:flex;align-items:center;justify-content:center;gap:8px;
  background:var(--gold);color:var(--green-900) !important;
  font-family:'Poppins',sans-serif;font-weight:600;font-size:.92rem;
  padding:11px 12px;border-radius:10px;text-decoration:none;
  box-shadow:0 4px 14px rgba(0,0,0,.18);transition:transform .12s ease, background .12s ease;
}
.sidebar-cta a:hover{background:#e0ac3c;transform:translateY(-1px);}

.sidebar-nav{padding:6px 10px;flex:1;}
.sidebar-section-label{
  font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;
  color:#8fb89b;padding:16px 10px 6px;font-weight:600;
}
.sidebar-nav a.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:8px;color:#dcecdf !important;
  text-decoration:none;font-size:.9rem;margin-bottom:2px;
  transition:background .12s ease;
}
.sidebar-nav a.nav-item i{font-size:1rem;width:18px;text-align:center;}
.sidebar-nav a.nav-item:hover{background:rgba(255,255,255,.08);color:#fff !important;}
.sidebar-nav a.nav-item.active{background:rgba(201,150,44,.22);color:#fff !important;font-weight:600;}

.sidebar-user{
  padding:14px 16px;border-top:1px solid rgba(255,255,255,.12);
  font-size:.82rem;
}
.sidebar-user .who{font-weight:600;color:#fff;}
.sidebar-user .role{color:#a9cbb2;font-size:.75rem;}
.sidebar-user a{color:#dcecdf;font-size:.78rem;}

.topbar{
  display:none; /* only shown on mobile */
  align-items:center;justify-content:space-between;
  background:var(--surface);border-bottom:1px solid var(--line);
  padding:12px 16px;position:sticky;top:0;z-index:30;
}
.topbar .toggle{background:none;border:1px solid var(--line);border-radius:8px;padding:6px 10px;}

.content{flex:1;min-width:0;}
.app-body{padding:28px 32px;max-width:1400px;}

/* ---------- Cards / stats ---------- */
.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 1px 3px rgba(20,20,10,.04);}
.card-header{background:var(--surface);border-bottom:1px solid var(--line);border-radius:var(--radius) var(--radius) 0 0 !important;font-weight:600;font-family:'Poppins',sans-serif;font-size:.95rem;}

.stat-card{
  border-radius:var(--radius);padding:18px 20px;color:#fff;
  box-shadow:0 6px 16px rgba(15,61,46,.16);position:relative;overflow:hidden;
}
.stat-card i.bg-icon{position:absolute;right:10px;top:8px;font-size:2.4rem;opacity:.18;}
.stat-card h2{font-size:1.9rem;margin-bottom:0;font-weight:700;color:#fff;font-family:'Poppins',sans-serif;}
.stat-card .label{opacity:.92;font-size:.8rem;font-weight:500;}
.bg-green{background:linear-gradient(135deg,var(--green-700),var(--green-900));}
.bg-blue{background:linear-gradient(135deg,#2f6fed,#1d3f9e);}
.bg-orange{background:linear-gradient(135deg,#e08a1f,#a5620c);}
.bg-red{background:linear-gradient(135deg,#d1453a,#8a231c);}

/* ---------- Period cards (signature element - the "class bell") ---------- */
.period-card{border-radius:var(--radius);border:1px solid var(--line);transition:.15s;background:var(--surface);}
.period-card:hover{box-shadow:0 10px 22px rgba(20,20,10,.08);transform:translateY(-1px);}
.period-card.taken{background:#f2f8f4;border-color:#bfe0cb;}
.period-badge{
  width:46px;height:46px;border-radius:50%;
  background:var(--green-800);color:var(--gold);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-family:'Poppins',sans-serif;font-size:.95rem;
  border:2px solid var(--gold);
}

.btn-brand{background:var(--green-800);border-color:var(--green-800);color:#fff;font-weight:500;}
.btn-brand:hover{background:var(--green-900);border-color:var(--green-900);color:#fff;}
.btn-gold{background:var(--gold);border-color:var(--gold);color:var(--green-900);font-weight:600;}
.btn-gold:hover{background:var(--gold-dark);border-color:var(--gold-dark);color:#fff;}

/* ---------- Attendance entry - the core, most-used screen ---------- */
textarea.absentee-box{
  font-size:1.3rem;font-family:'Roboto Mono',monospace;letter-spacing:.5px;
  line-height:1.7;border:2px solid var(--line);border-radius:10px;
}
textarea.absentee-box:focus{border-color:var(--green-700);box-shadow:0 0 0 3px rgba(28,107,63,.12);}
#livePreview{font-family:'Poppins',sans-serif;font-size:1rem;}
.sticky-save-bar{
  position:sticky;bottom:0;background:var(--surface);
  border-top:1px solid var(--line);padding:14px 0;margin-top:16px;
  z-index:20;
}

/* ---------- Login ---------- */
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle at 20% 20%, var(--green-700), var(--green-900) 60%);
  padding:20px;
}
.login-card{width:100%;max-width:400px;border-radius:16px;border:none;box-shadow:0 20px 50px rgba(0,0,0,.3);}
.login-mark{
  width:56px;height:56px;border-radius:14px;background:var(--gold);
  display:flex;align-items:center;justify-content:center;color:var(--green-900);
  font-family:'Poppins',sans-serif;font-weight:700;font-size:1.5rem;margin:0 auto;
}

/* ---------- Tables ---------- */
table.table thead{background:var(--paper);}
table.table thead th{font-family:'Poppins',sans-serif;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);border-bottom:2px solid var(--line) !important;}
table.table tbody tr:hover{background:#faf9f4;}

/* ---------- Empty states ---------- */
.empty-state{text-align:center;padding:48px 20px;color:var(--muted);}
.empty-state i{font-size:2.4rem;color:var(--line);display:block;margin-bottom:10px;}

/* ---------- Misc ---------- */
.badge{font-weight:500;}
footer.app-footer{color:var(--muted);font-size:.8rem;padding:18px 32px;}

/* ---------- Mobile touch-target and readability improvements ---------- */
.btn{min-height:38px;}
.btn-sm{min-height:34px;padding:.35rem .65rem;}
.table .btn-sm{min-width:34px;}
input.form-control, select.form-select, textarea.form-control{min-height:42px;font-size:1rem;}
.table-responsive{-webkit-overflow-scrolling:touch;}
@media (max-width:767px){
  .card-body{padding:16px;}
  h4{font-size:1.15rem;}
  .stat-card h2{font-size:1.6rem;}
  .stat-card{padding:14px 16px;}
  .table-responsive{position:relative;}
  .table-responsive::after{
    content:"";position:absolute;top:0;right:0;bottom:0;width:16px;pointer-events:none;
    background:linear-gradient(90deg, rgba(0,0,0,0), rgba(0,0,0,.06));
  }
  .sidebar-cta a{font-size:.95rem;padding:13px 12px;}
  .period-badge{width:42px;height:42px;font-size:.85rem;}
}

@media (max-width:991px){
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);transition:transform .2s ease;}
  .sidebar.open{transform:translateX(0);box-shadow:0 0 40px rgba(0,0,0,.35);}
  .topbar{display:flex;}
  .app-body{padding:18px;}
  .sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:35;}
  .sidebar-backdrop.show{display:block;}
}

/* ---------- Print (Attendance Register) ---------- */
.register-table{font-size:.8rem;}
.register-table th, .register-table td{padding:.35rem .4rem;}
@media print{
  .sidebar, .topbar, .app-footer, .no-print{display:none !important;}
  .app-shell, .content, .app-body{display:block !important;padding:0 !important;margin:0 !important;width:100% !important;}
  body{background:#fff;}
  .card{border:none;box-shadow:none;}
  .register-table{font-size:10px;}
  .register-table th, .register-table td{padding:2px 3px;border:1px solid #999 !important;}
  @page{size:A4 landscape;margin:10mm;}
}

/* ===== Extra mobile & security/UX polish (colors unchanged) ===== */
@media (max-width: 575px) {
  .app-body { padding: 12px !important; }
  .btn { font-size: 0.9rem; }
  .stat-card h2 { font-size: 1.4rem; }
  .d-flex.gap-2 { gap: 0.4rem !important; }
  .table { font-size: 0.85rem; }
}
/* Larger touch targets on mobile */
@media (pointer: coarse) {
  .nav-item { padding: 12px 12px !important; min-height: 44px; }
  .btn-sm { min-height: 40px; min-width: 40px; }
}
/* Safe area for notched phones */
@supports (padding: env(safe-area-inset-bottom)) {
  .sidebar-user { padding-bottom: calc(14px + env(safe-area-inset-bottom)); }
}