/* =========================================================
   E-Class Modern System Theme v19
   A shared visual layer for teacher/admin/student pages.
   It intentionally overrides older inline page styling without
   touching core PHP logic or database behavior.
   ========================================================= */
:root{
  --ec-primary:#2563eb;
  --ec-primary-2:#06b6d4;
  --ec-primary-3:#7c3aed;
  --ec-success:#10b981;
  --ec-warning:#f59e0b;
  --ec-danger:#ef4444;
  --ec-ink:#0f172a;
  --ec-muted:#64748b;
  --ec-soft:#f8fafc;
  --ec-line:#e2e8f0;
  --ec-card:rgba(255,255,255,.88);
  --ec-radius:20px;
  --ec-shadow:0 18px 50px rgba(15,23,42,.10);
  --ec-shadow-sm:0 8px 24px rgba(15,23,42,.08);
  --ec-sidebar:#07111f;
  --ec-sidebar-2:#0f172a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:
    radial-gradient(circle at top left, rgba(37,99,235,.13), transparent 34rem),
    radial-gradient(circle at top right, rgba(6,182,212,.14), transparent 30rem),
    linear-gradient(135deg,#f8fafc 0%,#eef6ff 46%,#f8fafc 100%) !important;
  color:var(--ec-ink);
  min-height:100vh;
}
a{transition:color .18s ease, background .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease}
.page-container{min-height:100vh;background:transparent!important}
.sidebar{
  background:
    radial-gradient(circle at top, rgba(37,99,235,.32), transparent 19rem),
    linear-gradient(180deg,var(--ec-sidebar),var(--ec-sidebar-2) 58%,#020617)!important;
  box-shadow:10px 0 35px rgba(15,23,42,.12);
  position:sticky!important;
  top:0;
  height:100vh;
  overflow-y:auto;
  border-right:1px solid rgba(255,255,255,.08);
}
.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-thumb{background:rgba(148,163,184,.35);border-radius:999px}
.sidebar-header{
  display:flex!important;
  align-items:center;
  gap:12px;
  text-align:left!important;
  padding:24px 22px!important;
  letter-spacing:0!important;
  text-transform:none!important;
  border-bottom:1px solid rgba(255,255,255,.08)!important;
}
.brand-mark{
  width:44px;height:44px;border-radius:16px;
  display:grid;place-items:center;
  color:white;
  background:linear-gradient(135deg,var(--ec-primary),var(--ec-primary-2));
  box-shadow:0 12px 30px rgba(37,99,235,.35);
  flex:0 0 auto;
}
.brand-title{font-size:1rem;font-weight:900;color:white;line-height:1.1}.brand-subtitle{font-size:.74rem;color:#94a3b8;margin-top:3px;font-weight:600}
.nav-section-label{padding:18px 24px 7px;color:#64748b;text-transform:uppercase;letter-spacing:.12em;font-size:.68rem;font-weight:900}
.sidebar-nav{padding:10px 10px 20px!important}.sidebar a{
  border-left:0!important;
  border-radius:14px!important;
  margin:3px 8px!important;
  padding:12px 14px!important;
  color:#aebbd0!important;
  gap:10px;
}
.sidebar a i{margin-right:0!important;width:22px!important;color:#7dd3fc}.sidebar a:hover{
  background:rgba(255,255,255,.08)!important;color:#fff!important;transform:translateX(3px)
}
.sidebar a.active{
  background:linear-gradient(135deg,rgba(37,99,235,.96),rgba(6,182,212,.82))!important;
  color:#fff!important;
  box-shadow:0 14px 30px rgba(37,99,235,.24);
}
.sidebar a.active i{color:#fff}.sidebar-footer{background:rgba(2,6,23,.36)!important;border-top:1px solid rgba(255,255,255,.08)!important;padding:18px 0!important}.sidebar-footer p{color:#cbd5e1!important;font-weight:800!important}.sidebar-footer .logout-btn{border-radius:14px!important;border-color:rgba(239,68,68,.45)!important;color:#fecaca!important}.sidebar-footer .logout-btn:hover{background:#ef4444!important;color:#fff!important}
.dashboard-main{background:transparent!important;min-width:0}.header,.modern-topbar{
  margin:0 0 24px!important;
  background:rgba(255,255,255,.78)!important;
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(226,232,240,.9)!important;
  box-shadow:0 12px 28px rgba(15,23,42,.05)!important;
  padding:28px 40px!important;
  justify-content:space-between!important;
  gap:18px;
}
.topbar-eyebrow{font-size:.75rem;font-weight:900;text-transform:uppercase;letter-spacing:.14em;color:var(--ec-primary)}
.header h1,.modern-topbar h1{font-size:clamp(1.45rem,2vw,2.15rem)!important;font-weight:900!important;letter-spacing:-.045em!important;margin:4px 0 5px!important;color:#0f172a!important}.topbar-subtitle{margin:0;color:var(--ec-muted);font-weight:600;font-size:.93rem}.topbar-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.topbar-action{display:inline-flex;align-items:center;gap:8px;padding:11px 14px;border-radius:14px;text-decoration:none;font-weight:800;font-size:.86rem;border:1px solid #dbeafe;background:#fff;color:#1d4ed8;box-shadow:0 10px 22px rgba(37,99,235,.08)}.topbar-action.primary{background:linear-gradient(135deg,var(--ec-primary),var(--ec-primary-2));border:0;color:#fff}.topbar-action:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(37,99,235,.16)}
.content{padding:0 40px 40px!important;gap:28px!important}.card{
  background:var(--ec-card)!important;
  border:1px solid rgba(226,232,240,.85)!important;
  border-radius:var(--ec-radius)!important;
  box-shadow:var(--ec-shadow)!important;
  backdrop-filter:blur(14px);
  overflow:hidden;
}
.card h2{letter-spacing:-.025em}.left-panel,.right-panel{min-width:0}.right-panel{position:sticky;top:20px;align-self:flex-start}
.dashboard-hero{
  position:relative;
  overflow:hidden;
  border-radius:24px;
  padding:26px;
  background:
    linear-gradient(135deg,rgba(15,23,42,.96),rgba(30,64,175,.9) 52%,rgba(6,182,212,.78)),
    radial-gradient(circle at 85% 20%,rgba(255,255,255,.24),transparent 18rem);
  color:#fff;
  margin-bottom:24px;
}
.dashboard-hero:after{content:'';position:absolute;right:-70px;top:-80px;width:220px;height:220px;border-radius:999px;border:36px solid rgba(255,255,255,.09)}
.dashboard-hero .hero-meta{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.18);padding:7px 11px;border-radius:999px;font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:#e0f2fe}.dashboard-hero h2{color:#fff!important;border:0!important;margin:14px 0 8px!important;font-size:clamp(1.55rem,2.6vw,2.35rem)!important;letter-spacing:-.05em!important}.dashboard-hero p{max-width:740px;color:#dbeafe;line-height:1.6;margin:0}.hero-stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:20px;position:relative;z-index:1}.hero-stat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:15px}.hero-stat strong{display:block;font-size:1.55rem;color:#fff;line-height:1}.hero-stat span{display:block;color:#bae6fd;font-size:.78rem;font-weight:800;margin-top:7px;text-transform:uppercase;letter-spacing:.04em}
.quick-action-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0 0 24px}.quick-action-card{display:flex;align-items:center;gap:12px;text-decoration:none;border:1px solid #e2e8f0;background:#fff;border-radius:18px;padding:15px;color:#0f172a;box-shadow:var(--ec-shadow-sm)}.quick-action-card i{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:#eff6ff;color:#2563eb;font-size:1.05rem}.quick-action-card strong{display:block;font-size:.92rem}.quick-action-card span{display:block;font-size:.76rem;color:var(--ec-muted);margin-top:3px}.quick-action-card:hover{transform:translateY(-2px);border-color:#bfdbfe;box-shadow:0 18px 32px rgba(37,99,235,.12)}
.identity-policy,.dashboard-student-search{border-radius:20px!important}.identity-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important}.identity-card{border-radius:20px!important;box-shadow:var(--ec-shadow-sm)!important;position:relative;overflow:hidden}.identity-card:before{content:'';position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,var(--ec-primary),var(--ec-primary-2))}.identity-card strong{font-size:1.9rem!important;letter-spacing:-.04em}.dashboard-student-search{background:linear-gradient(180deg,rgba(239,246,255,.95),rgba(255,255,255,.94))!important;box-shadow:var(--ec-shadow-sm)!important;padding:22px!important}.student-search-form input[type="text"],input[type="text"],input[type="number"],input[type="file"],textarea,select{border-radius:14px!important;background:#fff!important;border:1px solid #d8e1ee!important;box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}.student-search-form button,.student-search-clear,.student-search-all,.submit-btn,.print-btn,button[type="submit"]{border-radius:14px!important;font-weight:900!important}.submit-btn,button[type="submit"]{background:linear-gradient(135deg,var(--ec-primary),var(--ec-primary-2))!important;border:0!important;box-shadow:0 14px 28px rgba(37,99,235,.18)!important}.submit-btn:hover,button[type="submit"]:hover{filter:saturate(1.05) brightness(.98);transform:translateY(-1px)}
.school-year-block{margin-bottom:26px!important}.sy-summary{border-radius:20px!important;background:linear-gradient(135deg,#0f172a,#1e40af)!important;box-shadow:var(--ec-shadow-sm)!important}.roster-group{grid-template-columns:repeat(auto-fill,minmax(310px,1fr))!important;gap:18px!important}.sticky-note{background:#fff!important;border-radius:22px!important;border:1px solid rgba(226,232,240,.9)!important;box-shadow:var(--ec-shadow-sm)!important;transform:none!important;max-height:none!important;overflow:hidden!important}.sticky-note:before{display:none!important}.sticky-note:hover{transform:translateY(-3px)!important;box-shadow:0 20px 42px rgba(15,23,42,.12)!important}.sticky-note summary{padding:20px 22px!important;background:linear-gradient(180deg,#fff,#f8fafc)!important}.sticky-note summary:before{content:'';position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(180deg,var(--ec-primary),var(--ec-primary-2))}.sticky-note summary span{color:#64748b!important}.roster-group-content{background:#fff!important}.sticky-table,.bordered-table,table{border-radius:16px;overflow:hidden}.sticky-table th,.sticky-table td,table th,table td{border-color:#e2e8f0!important}.sticky-table th,table th{background:#f8fafc!important;color:#334155!important}.sticky-table tr:hover td,table tr:hover td{background:#f8fbff!important}.action-links a,.sticky-table a{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:34px;border-radius:12px;background:#f8fafc;text-decoration:none!important}.action-view{color:#0284c7!important}.action-edit{color:#d97706!important}.action-delete{color:#dc2626!important}.action-migrate{color:#7c3aed!important}.migration-student-list{border-radius:18px!important;background:#fff!important}.message{border-radius:16px!important}.success{background:#ecfdf5!important}.error{background:#fff1f2!important}.toolbar{box-shadow:0 16px 40px rgba(15,23,42,.18)!important}.sheet{border-radius:22px;overflow:hidden}.table-responsive{width:100%;overflow-x:auto}
@media (max-width:1180px){.content{flex-direction:column!important}.right-panel{position:static}.hero-stat-grid,.quick-action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.identity-grid{grid-template-columns:1fr!important}}
@media (max-width:820px){.page-container{display:block!important}.sidebar{position:relative!important;height:auto!important;width:100%!important}.sidebar-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}.nav-section-label{grid-column:1/-1}.header,.modern-topbar{padding:20px!important;align-items:flex-start!important;flex-direction:column!important}.content{padding:0 16px 28px!important}.card{padding:22px!important}.hero-stat-grid,.quick-action-grid{grid-template-columns:1fr}.gender-group{display:block!important}.student-search-form{display:block!important}.student-search-form input,.student-search-form button,.student-search-clear,.student-search-all{width:100%;margin-top:8px}.roster-group{grid-template-columns:1fr!important}.sticky-table{font-size:.82rem}.sidebar-footer{display:none}}
@media print{body{background:#fff!important}.sidebar,.toolbar,.topbar-actions{display:none!important}.dashboard-main,.content,.card{box-shadow:none!important;background:#fff!important;border:0!important}.header{display:none!important}}

/* =========================================================
   Teacher sidebar reorganization + dedicated class creation
   ========================================================= */
.sidebar-nav-group{margin:0 0 10px}.sidebar a .nav-link-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}.sidebar a .nav-link-text strong{font-size:.86rem;font-weight:850;white-space:normal}.sidebar a .nav-link-text small{font-size:.68rem;color:#718096;font-weight:700;margin-top:3px;white-space:normal}.sidebar a:hover .nav-link-text small,.sidebar a.active .nav-link-text small{color:rgba(255,255,255,.76)}.sidebar a.nav-danger i{color:#fca5a5!important}.sidebar a.nav-danger:hover{background:rgba(239,68,68,.12)!important}.content-dashboard-full .left-panel{flex:1 1 100%}.content-dashboard-full .card{width:100%}
.create-class-page{padding:0!important;overflow:hidden}.create-class-intro{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px;background:linear-gradient(135deg,rgba(15,23,42,.96),rgba(30,64,175,.90),rgba(6,182,212,.78));color:#fff}.create-class-intro .hero-meta{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.18);padding:7px 11px;border-radius:999px;font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:#e0f2fe}.create-class-intro h2{color:#fff!important;border:0!important;margin:14px 0 8px!important;font-size:clamp(1.7rem,2.8vw,2.5rem)!important;letter-spacing:-.05em!important}.create-class-intro p{max-width:760px;color:#dbeafe;line-height:1.6;margin:0}.create-class-current-year{min-width:220px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.12);border-radius:20px;padding:18px;text-align:center}.create-class-current-year span{display:block;color:#bae6fd;font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.create-class-current-year strong{display:block;color:#fff;font-size:1.35rem;margin-top:5px}.create-class-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;padding:30px}.create-method-card{border:1px solid #e2e8f0;background:#fff;border-radius:22px;padding:24px;box-shadow:var(--ec-shadow-sm);min-width:0}.method-header{display:flex;gap:14px;align-items:flex-start;margin-bottom:22px}.method-icon{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:#eff6ff;color:#2563eb;font-size:1.15rem;flex:0 0 auto}.method-header h3{margin:0;color:#0f172a;font-size:1.12rem;letter-spacing:-.025em}.method-header p{margin:5px 0 0;color:#64748b;line-height:1.45;font-size:.9rem}.form-row-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.create-gender-group textarea{height:230px}.csv-upload-panel{background:#f8fafc;border:1px dashed #cbd5e1;border-radius:18px;padding:16px;margin-bottom:20px}.csv-format-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.csv-format-header label{margin:0}.template-download{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:900;font-size:.82rem;background:#f59e0b;color:#fff!important;padding:9px 12px;border-radius:12px;box-shadow:0 10px 22px rgba(245,158,11,.18)}.csv-upload-panel small{display:block;color:#64748b;line-height:1.45}.csv-upload-panel code{font-size:.78rem;color:#334155}.csv-upload-panel input[type="file"]{margin-top:14px}.csv-upload-panel p{font-size:.84rem;color:#64748b;margin:10px 0 0;line-height:1.45}@media (max-width:1180px){.create-class-grid{grid-template-columns:1fr}.create-class-intro{align-items:flex-start;flex-direction:column}.create-class-current-year{text-align:left;min-width:0;width:100%}}@media (max-width:820px){.form-row-2{grid-template-columns:1fr}.create-class-grid,.create-class-intro{padding:20px}.csv-format-header{align-items:flex-start;flex-direction:column}.template-download{width:100%;justify-content:center}}