*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#0A2240;--navy2:#143460;--navy3:#1B4580;
  --blue:#1A6FC4;--blue2:#2B87E3;--blue3:#5AACE8;
  --pale:#D6EAFB;--sky:#E8F4FD;--off:#F5F9FE;
  --white:#fff;--text:#0A2240;--muted:#4A6080;--border:#C5DCF0;
  --green:#16a34a;--green-bg:#dcfce7;
  --red:#dc2626;--red-bg:#fee2e2;
  --orange:#d97706;--orange-bg:#fef3c7;
  --radius:10px;--radius-lg:16px;
  --shadow:0 4px 24px rgba(10,34,64,.10);
  --shadow-lg:0 12px 48px rgba(10,34,64,.15);
}
html{font-size:15px;scroll-behavior:smooth;overflow-x:hidden}
body{font-family:'Sora',sans-serif;background:var(--off);color:var(--text);min-height:100vh;overflow-x:hidden}
button{font-family:'Sora',sans-serif;cursor:pointer}
input,select,textarea{font-family:'Sora',sans-serif}

/* ── SHELL (admin/aluno layout) ── */
.shell{display:flex;min-height:100vh}
.sidebar{
  width:240px;background:var(--navy);flex-shrink:0;
  display:flex;flex-direction:column;position:fixed;height:100vh;z-index:50;
  border-right:1px solid rgba(255,255,255,.05);
}
.sb-logo{
  padding:1.25rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;gap:10px;
}
.sb-mark{
  width:36px;height:36px;background:var(--blue2);border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;color:#fff;letter-spacing:-1px;flex-shrink:0;
}
.sb-brand{display:flex;flex-direction:column}
.sb-name{font-size:.88rem;font-weight:700;color:#fff;line-height:1}
.sb-sub{font-size:.65rem;color:var(--blue3);letter-spacing:.1em;text-transform:uppercase;margin-top:2px}
.sb-user{
  padding:1rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.07);
  display:flex;align-items:center;gap:10px;
}
.sb-avatar{
  width:34px;height:34px;border-radius:50%;background:rgba(43,135,227,.3);
  display:flex;align-items:center;justify-content:center;
  font-size:.75rem;font-weight:700;color:var(--blue3);flex-shrink:0;
}
.sb-uname{font-size:.8rem;font-weight:600;color:rgba(255,255,255,.85);line-height:1;margin-bottom:2px}
.sb-urole{font-size:.67rem;color:rgba(255,255,255,.4);letter-spacing:.06em;text-transform:uppercase}
.sb-nav{flex:1;padding:1rem 0;overflow-y:auto}
.sb-section{
  font-size:.62rem;font-weight:700;color:rgba(255,255,255,.3);
  letter-spacing:.12em;text-transform:uppercase;padding:.5rem 1.5rem .25rem;
}
.sb-link{
  display:flex;align-items:center;gap:10px;padding:.62rem 1.5rem;
  color:rgba(255,255,255,.6);text-decoration:none;font-size:.84rem;font-weight:400;
  transition:all .2s;border-left:3px solid transparent;
}
.sb-link:hover{background:rgba(255,255,255,.05);color:rgba(255,255,255,.9)}
.sb-link.active{background:rgba(43,135,227,.15);color:var(--blue3);border-left-color:var(--blue2);font-weight:600}
.sb-icon{width:18px;text-align:center;font-size:1rem;flex-shrink:0}
.sb-footer{padding:1rem 1.25rem;border-top:1px solid rgba(255,255,255,.07)}
.btn-logout{
  width:100%;background:rgba(220,38,38,.1);border:1px solid rgba(220,38,38,.2);
  color:rgba(255,100,100,.8);padding:.55rem;border-radius:7px;
  font-size:.78rem;font-weight:500;transition:all .2s;
}
.btn-logout:hover{background:rgba(220,38,38,.2);color:#f87171}
.main{margin-left:240px;flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{
  background:var(--white);border-bottom:1px solid var(--border);
  padding:.9rem 2rem;display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:40;
}
.topbar-title{font-size:1.1rem;font-weight:700;color:var(--navy)}
.badge-role{
  background:var(--pale);color:var(--blue);font-size:.7rem;font-weight:700;
  padding:.3rem .8rem;border-radius:100px;letter-spacing:.06em;text-transform:uppercase;
  border:1px solid rgba(43,135,227,.2);
}
.content{padding:2rem;flex:1}

/* ── STATS ── */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:2rem}
.stat-box{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:1.25rem 1.5rem;display:flex;align-items:center;gap:1rem;
}
.stat-ico{width:44px;height:44px;border-radius:10px;background:var(--sky);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.stat-num{font-size:1.7rem;font-weight:700;color:var(--navy);line-height:1}
.stat-lbl{font-size:.73rem;color:var(--muted);margin-top:2px;font-weight:400}

/* ── CARDS ── */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card-thumb{height:130px;display:flex;align-items:center;justify-content:center;font-size:2.5rem;position:relative;background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%)}
.card-body{padding:1rem 1.25rem 1.25rem}
.card-cat{font-size:.68rem;color:var(--blue);font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:.3rem}
.card-title{font-size:.95rem;font-weight:700;color:var(--navy);margin-bottom:.35rem;line-height:1.35}
.card-desc{font-size:.8rem;color:var(--muted);line-height:1.6;margin-bottom:.85rem}
.card-meta{display:flex;align-items:center;gap:.75rem;font-size:.73rem;color:var(--muted);padding-top:.75rem;border-top:1px solid var(--border)}
.card-meta span{display:flex;align-items:center;gap:3px}
.card-actions{display:flex;gap:.5rem;margin-left:auto}

/* ── BUTTONS ── */
.btn-sm{padding:.38rem .85rem;border-radius:6px;font-size:.75rem;font-weight:600;border:none;transition:all .2s}
.btn-primary-sm{background:var(--navy);color:#fff}.btn-primary-sm:hover{background:var(--blue2)}
.btn-danger-sm{background:var(--red-bg);color:var(--red)}.btn-danger-sm:hover{background:var(--red);color:#fff}
.btn-edit-sm{background:var(--sky);color:var(--blue)}.btn-edit-sm:hover{background:var(--blue2);color:#fff}
.btn-add{
  background:var(--blue2);color:#fff;border:none;
  padding:.65rem 1.25rem;border-radius:8px;font-size:.83rem;font-weight:600;
  display:flex;align-items:center;gap:.4rem;transition:background .2s;
}
.btn-add:hover{background:var(--blue3)}

/* ── TABLE ── */
.table-wrap{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.tbl-header{padding:1rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.tbl-title{font-size:.9rem;font-weight:700;color:var(--navy)}
table{width:100%;border-collapse:collapse}
thead tr{background:var(--off)}
th{padding:.7rem 1rem;text-align:left;font-size:.72rem;font-weight:700;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;border-bottom:1px solid var(--border)}
td{padding:.75rem 1rem;font-size:.82rem;color:var(--text);border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--sky)}
.badge{display:inline-flex;align-items:center;padding:.25rem .7rem;border-radius:100px;font-size:.68rem;font-weight:700;letter-spacing:.04em}
.badge-green{background:var(--green-bg);color:var(--green)}
.badge-blue{background:var(--pale);color:var(--blue)}
.badge-orange{background:var(--orange-bg);color:var(--orange)}

/* ── MODAL ── */
.modal-backdrop{position:fixed;inset:0;background:rgba(10,34,64,.6);z-index:200;display:none;align-items:center;justify-content:center;padding:1rem}
.modal-backdrop.open{display:flex}
.modal{background:var(--white);border-radius:var(--radius-lg);width:100%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}
.modal-header{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:#fff;z-index:1}
.modal-title{font-size:1rem;font-weight:700;color:var(--navy)}
.modal-close{width:30px;height:30px;border:none;background:var(--off);border-radius:6px;font-size:1.1rem;color:var(--muted);display:flex;align-items:center;justify-content:center;transition:background .2s}
.modal-close:hover{background:var(--border)}
.modal-body{padding:1.5rem}
.modal-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);display:flex;gap:.75rem;justify-content:flex-end}

/* ── FORM ── */
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
.form-field{margin-bottom:1rem}
.form-field label{display:block;font-size:.73rem;font-weight:700;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:.35rem}
.form-field input,.form-field select,.form-field textarea{
  width:100%;border:1.5px solid var(--border);border-radius:7px;
  padding:.6rem .85rem;font-size:.85rem;outline:none;color:var(--text);
  transition:border-color .2s,box-shadow .2s;background:var(--off);
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--blue2);box-shadow:0 0 0 3px rgba(43,135,227,.1);background:#fff}
.form-field textarea{resize:vertical;min-height:80px}
.btn-cancel{background:var(--off);border:1px solid var(--border);color:var(--muted);padding:.6rem 1.2rem;border-radius:7px;font-size:.83rem;font-weight:500}
.btn-cancel:hover{background:var(--border)}
.btn-save{background:var(--blue2);color:#fff;border:none;padding:.6rem 1.4rem;border-radius:7px;font-size:.83rem;font-weight:600}
.btn-save:hover{background:var(--blue3)}

/* ── PAGE HEADER ── */
.page-hdr{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}
.page-hdr-left h1{font-size:1.2rem;font-weight:700;color:var(--navy);margin-bottom:.2rem}
.page-hdr-left p{font-size:.8rem;color:var(--muted)}

/* ── PROGRESS ── */
.progress-wrap{margin-top:.5rem}
.progress-label{display:flex;justify-content:space-between;font-size:.72rem;color:var(--muted);margin-bottom:.3rem}
.progress-bar{height:6px;background:var(--border);border-radius:100px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--blue2),var(--blue3));border-radius:100px;transition:width .4s}

/* ── VIDEO LIST ── */
.video-list{display:flex;flex-direction:column;gap:.75rem}
.video-item{background:var(--off);border:1px solid var(--border);border-radius:var(--radius);padding:.85rem 1rem;display:flex;align-items:center;gap:.85rem}
.video-num{width:28px;height:28px;border-radius:6px;background:var(--blue2);color:#fff;font-size:.72rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.video-info{flex:1;min-width:0}
.video-title{font-size:.85rem;font-weight:600;color:var(--navy);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-url{font-size:.72rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-actions{display:flex;gap:.4rem;flex-shrink:0}
.video-done{width:22px;height:22px;border-radius:50%;border:2px solid var(--border);background:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;cursor:pointer;transition:all .2s;flex-shrink:0}
.video-done.done{background:var(--green);border-color:var(--green);color:#fff}
.video-play{width:30px;height:30px;border-radius:6px;background:var(--blue2);color:#fff;font-size:.8rem;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:background .2s}
.video-play:hover{background:var(--blue3)}

/* ── PLAYER ── */
.player-wrap{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:1.5rem}
.player-info{padding:1.25rem 1.5rem}
.player-title{font-size:1.05rem;font-weight:700;color:var(--navy);margin-bottom:.3rem}
.player-course{font-size:.78rem;color:var(--muted)}

/* ── ENROLLED ── */
.enrolled-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.enrolled-card{background:var(--white);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;cursor:pointer;transition:transform .2s,box-shadow .2s;text-decoration:none;display:block}
.enrolled-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.enrolled-thumb{height:110px;background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%);display:flex;align-items:center;justify-content:center;font-size:2.2rem}
.enrolled-body{padding:1rem 1.1rem 1.1rem}
.enrolled-title{font-size:.9rem;font-weight:700;color:var(--navy);margin-bottom:.25rem;line-height:1.35}
.enrolled-desc{font-size:.76rem;color:var(--muted);margin-bottom:.7rem;line-height:1.5}
.enrolled-meta{font-size:.73rem;color:var(--muted);margin-bottom:.6rem}

/* ── COURSE DETAIL ── */
.course-detail-header{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%);border-radius:var(--radius-lg);padding:2rem;margin-bottom:1.5rem;display:flex;align-items:center;gap:1.5rem}
.course-detail-header h1{font-family:'Lora',serif;font-size:1.4rem;color:#fff;margin-bottom:.3rem}
.course-detail-header p{font-size:.82rem;color:rgba(255,255,255,.6)}
.back-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.8);padding:.45rem .9rem;border-radius:7px;font-size:.78rem;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:.4rem;transition:background .2s;text-decoration:none}
.back-btn:hover{background:rgba(255,255,255,.18)}
.two-col{display:grid;grid-template-columns:1fr 320px;gap:1.5rem;align-items:start}
.sidebar-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem}
.sidebar-box h3{font-size:.88rem;font-weight:700;color:var(--navy);margin-bottom:.85rem}

/* ── EMPTY ── */
.empty{text-align:center;padding:3rem 1rem;color:var(--muted)}
.empty-ico{font-size:2.5rem;margin-bottom:.75rem}
.empty-title{font-size:.95rem;font-weight:600;color:var(--navy);margin-bottom:.35rem}
.empty p{font-size:.8rem}

/* ── ALERT ── */
.alert{padding:.75rem 1rem;border-radius:8px;font-size:.82rem;margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}
.alert-success{background:var(--green-bg);color:var(--green)}
.alert-danger{background:var(--red-bg);color:var(--red)}

/* ── TOAST ── */
.toast{position:fixed;bottom:1.5rem;right:1.5rem;z-index:999;background:var(--navy);color:#fff;padding:.75rem 1.25rem;border-radius:10px;font-size:.83rem;font-weight:500;box-shadow:var(--shadow-lg);transform:translateY(80px);opacity:0;transition:all .3s;pointer-events:none;display:flex;align-items:center;gap:.5rem}
.toast.show{transform:translateY(0);opacity:1}

/* ── TWO COL EQUAL ── */
.two-col-equal{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}

/* ── IMPORT STATS GRID ── */
.import-stats-grid{display:grid;grid-template-columns:repeat(var(--cols,3),1fr);gap:1rem;margin-bottom:1rem}

/* ── COURSES CHECK ── */
.courses-check{display:grid;grid-template-columns:1fr 1fr;gap:.4rem;max-height:180px;overflow-y:auto;padding:.5rem;background:var(--off);border:1px solid var(--border);border-radius:7px}
.courses-check label{display:flex;align-items:center;gap:.4rem;font-size:.8rem;cursor:pointer;padding:.35rem .5rem;border-radius:5px;background:var(--white);border:1px solid var(--border)}
.courses-check input[type=checkbox]{accent-color:var(--blue2)}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ── SIDEBAR TOGGLE (mobile) ── */
.sb-toggle{display:none;background:var(--off);border:1px solid var(--border);border-radius:7px;width:38px;height:38px;align-items:center;justify-content:center;font-size:1.1rem;color:var(--navy);flex-shrink:0}
.sb-overlay{display:none;position:fixed;inset:0;background:rgba(10,34,64,.5);z-index:45}
.sb-overlay.open{display:block}

/* ── RESPONSIVE (tablet/mobile) ── */
@media (max-width:900px){
  .sidebar{transform:translateX(-100%);transition:transform .25s ease;box-shadow:var(--shadow-lg)}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .sb-toggle{display:flex}
  .topbar{padding:.8rem 1.1rem}
  .content{padding:1.1rem}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .enrolled-grid{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr}
  .two-col-equal{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .courses-check{grid-template-columns:1fr}
  .table-wrap{overflow-x:auto}
  table{min-width:520px}
  .course-detail-header{padding:1.5rem;flex-wrap:wrap}
  .import-stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  .stats-row{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .enrolled-grid{grid-template-columns:1fr}
  .import-stats-grid{grid-template-columns:1fr}
  .page-hdr{flex-direction:column;align-items:flex-start;gap:.75rem}
  .modal{max-width:100%}
  .toast{left:1rem;right:1rem;bottom:1rem}
}