/* ECHO — Shared Styles */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --dark:#0f172a;
  --mid:#7c3aed;
  --navy:#4c1d95;
  --light:#e2e8f0;
  --accent:#f5f3ff;
  --bg:#f8fafc;
  --white:#fff;
  --border:#e2e8f0;
  --text:#1e293b;
  --muted:#64748b;
  --red:#dc2626;
  --green:#16a34a;
  --orange:#d97706;
  --purple:#7c3aed;
}
body{
  background:var(--bg);
  font-family:'Inter',system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--text);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
input,select,button,textarea{font-family:inherit;}
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px;}
a{color:var(--mid);}

/* ── Navbar ──────────────────────────────────────────────────────────────── */
.nav{
  background:#ffffff;
  border-bottom:1px solid #e8e8ec;
  padding:0 24px;
  height:52px;
  display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:200;
}
.nav-brand{display:flex;flex-direction:column;text-decoration:none;gap:1px;}
.nav-domain{color:#9ca3af;font-size:9px;letter-spacing:2.5px;text-transform:uppercase;}
.nav-title{color:#0f172a;font-weight:700;font-size:14px;letter-spacing:.3px;}
.nav-links{display:flex;gap:2px;}
.nav-link{
  color:#4a4a4a;font-size:13px;text-decoration:none;
  padding:6px 12px;border-radius:6px;
  transition:color .12s,background .12s;
}
.nav-link:hover{color:var(--mid);background:var(--accent);}
.nav-link.active{color:var(--mid);background:var(--accent);}
.nav-menu{display:none;background:none;border:1px solid var(--border);color:#4a4a4a;border-radius:6px;padding:4px 10px;cursor:pointer;font-size:18px;line-height:1;}
.nav-links.open{display:flex !important;flex-direction:column;position:absolute;top:52px;left:0;right:0;
  background:#fff;border-bottom:1px solid #e8e8ec;padding:8px 16px 14px;z-index:199;gap:2px;
  box-shadow:0 6px 20px rgba(0,0,0,.08);}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.page{padding:32px 16px;min-height:calc(100vh - 52px);}
.page-center{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 52px);padding:24px 16px;}
.container{max-width:1100px;margin:0 auto;}
.wrap-sm{max-width:520px;margin:0 auto;width:100%;}
.wrap-md{max-width:760px;margin:0 auto;width:100%;}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card{background:var(--white);border-radius:10px;border:1px solid var(--border);overflow:hidden;}
.card-head{padding:22px 28px;border-bottom:1px solid var(--border);}
.card-body{padding:24px 28px;}
.card-head h2,.card-head h1{color:var(--text);font-size:17px;font-weight:700;margin-bottom:3px;}
.card-head p{color:var(--muted);font-size:13px;}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;border-radius:7px;padding:9px 18px;
  font-size:14px;font-weight:600;cursor:pointer;
  text-decoration:none;
  transition:background .12s,transform .1s;
  line-height:1;
}
.btn:active:not(:disabled){transform:translateY(1px);}
.btn:disabled{opacity:.45;cursor:not-allowed;}
.btn-primary{background:var(--mid);color:#fff;}
.btn-primary:hover:not(:disabled){background:#6d28d9;}
.btn-mid{background:var(--mid);color:#fff;}
.btn-mid:hover:not(:disabled){background:#6d28d9;}
.btn-success{background:#15803d;color:#fff;}
.btn-success:hover:not(:disabled){background:#166534;}
.btn-danger{background:var(--red);color:#fff;}
.btn-danger:hover:not(:disabled){background:#b91c1c;}
.btn-outline{background:transparent;color:var(--mid);border:1.5px solid var(--mid);}
.btn-outline:hover:not(:disabled){background:var(--accent);}
.btn-ghost{background:transparent;color:var(--muted);border:none;}
.btn-ghost:hover:not(:disabled){background:#f1f5f9;color:var(--text);}
.btn-lg{padding:11px 24px;font-size:15px;border-radius:8px;}
.btn-sm{padding:5px 12px;font-size:12px;border-radius:5px;}
.btn-block{width:100%;}

/* ── Forms ───────────────────────────────────────────────────────────────── */
.fg{margin-bottom:16px;}
.fg label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:5px;}
.fg label .req{color:var(--red);margin-left:2px;}
.inp{
  width:100%;border:1px solid var(--border);
  border-radius:6px;padding:9px 12px;font-size:14px;
  outline:none;background:#fff;color:var(--text);
  transition:border-color .15s,box-shadow .15s;
}
.inp:focus{border-color:var(--mid);box-shadow:0 0 0 3px rgba(124,58,237,.12);}
.inp.err{border-color:var(--red);}
.inp-sm{padding:6px 10px;font-size:13px;}
.ferr{color:var(--red);font-size:12px;margin-top:4px;}
.fhint{color:var(--muted);font-size:12px;margin-top:4px;}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px;}

/* ── Alerts ──────────────────────────────────────────────────────────────── */
.alert{padding:11px 14px;border-radius:7px;font-size:13px;margin-bottom:12px;line-height:1.55;}
.alert-err{background:#fef2f2;border:1px solid #fca5a5;color:#991b1b;}
.alert-ok{background:#f0fdf4;border:1px solid #86efac;color:#15803d;}
.alert-warn{background:#fffbeb;border-left:3px solid #f59e0b;color:#92400e;padding-left:14px;}
.alert-info{background:var(--accent);border-left:3px solid var(--mid);color:#5b21b6;padding-left:14px;}

/* ── Badges ──────────────────────────────────────────────────────────────── */
.badge{display:inline-block;border-radius:5px;padding:2px 8px;font-size:11px;font-weight:700;letter-spacing:.2px;}
.b-A2{background:#dcfce7;color:#15803d;}
.b-B1{background:#fef3c7;color:#b45309;}
.b-B2{background:#f3e8ff;color:#7c3aed;}
.b-C1{background:#dbeafe;color:#1d4ed8;}
.b-FCE{background:#fef9c3;color:#854d0e;}
.b-CAE{background:#e0e7ff;color:#3730a3;}
.b-dark{background:#0f172a;color:#fff;}
.b-ok{background:#dcfce7;color:#15803d;}
.b-red{background:#fee2e2;color:#991b1b;}
.b-mid{background:#ede9ff;color:#6d28d9;}
.b-gray{background:#f1f5f9;color:#475569;}

/* ── Admin panels ─────────────────────────────────────────────────────────── */
.panel{background:#fff;border-radius:10px;border:1px solid var(--border);margin-bottom:20px;overflow:hidden;}
.panel-head{padding:13px 20px;display:flex;align-items:center;justify-content:space-between;}
.panel-head-dark{background:#0f172a;}
.panel-head-mid{background:var(--mid);}
.panel-head h3{color:#fff;font-size:14px;font-weight:700;margin:0;}
.panel-head p{color:rgba(255,255,255,.6);font-size:12px;margin:3px 0 0;}
.panel-body{padding:20px;}

/* ── Session status chips ─────────────────────────────────────────────────── */
.status-active{background:var(--mid);color:#fff;border-radius:20px;padding:3px 12px;font-weight:700;font-size:11px;display:inline-block;}
.status-finished{background:#15803d;color:#fff;border-radius:20px;padding:3px 12px;font-weight:700;font-size:11px;display:inline-block;}
.status-pending{background:#f1f5f9;color:#64748b;border-radius:20px;padding:3px 12px;font-weight:700;font-size:11px;display:inline-block;}
.countdown{font-family:monospace;font-weight:700;font-size:16px;color:var(--text);}
.countdown.urgent{color:var(--red);}

/* ── Checklist ────────────────────────────────────────────────────────────── */
.checklist{max-height:260px;overflow-y:auto;border:1px solid var(--border);border-radius:7px;}
.checklist-row{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid #f8fafc;cursor:pointer;}
.checklist-row:last-child{border-bottom:none;}
.checklist-row.selected{background:var(--accent);}

/* ── Modal overlay ────────────────────────────────────────────────────────── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:400;display:flex;align-items:flex-start;justify-content:center;padding:40px 16px;overflow-y:auto;}
.modal-box{background:#fff;border-radius:12px;border:1px solid var(--border);box-shadow:0 8px 40px rgba(0,0,0,.12);width:100%;max-width:780px;}
.modal-box-sm{max-width:540px;}
.modal-head{border-radius:12px 12px 0 0;padding:16px 22px;display:flex;justify-content:space-between;align-items:center;}
.modal-head-dark{background:#0f172a;}
.modal-head-mid{background:var(--mid);}
.modal-head h3{color:#fff;font-size:15px;font-weight:700;margin:0;}
.modal-head p{color:rgba(255,255,255,.65);font-size:12px;margin:3px 0 0;}
.modal-close{background:rgba(255,255,255,.12);border:none;color:#fff;border-radius:6px;padding:5px 12px;cursor:pointer;font-size:13px;font-weight:600;}
.modal-close:hover{background:rgba(255,255,255,.2);}
.modal-body{padding:22px;overflow-y:auto;max-height:70vh;}

/* ── Tabs ────────────────────────────────────────────────────────────────── */
.tabs{display:flex;border-bottom:1px solid var(--border);margin-bottom:20px;gap:0;overflow-x:auto;}
.tab{background:none;border:none;border-bottom:2px solid transparent;padding:9px 16px;cursor:pointer;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:-1px;white-space:nowrap;transition:color .12s;}
.tab:hover{color:var(--text);}
.tab.on{color:var(--mid);border-bottom-color:var(--mid);}

/* ── Tables ──────────────────────────────────────────────────────────────── */
.tbl{width:100%;border-collapse:collapse;font-size:13px;}
.tbl th{background:var(--bg);color:var(--muted);padding:9px 12px;text-align:left;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;white-space:nowrap;border-bottom:1px solid var(--border);}
.tbl td{padding:9px 12px;border-bottom:1px solid #f1f5f9;vertical-align:middle;}
.tbl tr:hover td{background:var(--bg);}
.tbl-wrap{overflow-x:auto;border-radius:0 0 10px 10px;}

/* ── Exam-specific ───────────────────────────────────────────────────────── */
.sec-badge{
  background:var(--bg);border:1px solid var(--border);
  border-radius:7px;padding:9px 14px;margin-bottom:10px;
  display:flex;justify-content:space-between;align-items:center;
}
.sec-badge span:first-child{color:var(--text);font-weight:700;font-size:12px;letter-spacing:.5px;text-transform:uppercase;}
.sec-badge span:last-child{background:var(--mid);color:#fff;border-radius:20px;padding:2px 11px;font-size:11px;font-weight:600;}
.instr{
  font-style:italic;color:var(--muted);font-size:12px;
  background:#f8fafc;border-left:2px solid var(--mid);
  padding:8px 12px;border-radius:0 5px 5px 0;margin:0 0 14px;
}
.ans-inp{border:1px solid var(--border);border-radius:5px;padding:6px 10px;font-size:13px;outline:none;transition:border-color .15s;}
.ans-inp:focus{border-color:var(--mid);box-shadow:0 0 0 2px rgba(124,58,237,.12);}
.timer{background:var(--mid);color:#fff;border-radius:7px;padding:5px 14px;font-weight:700;font-size:16px;font-family:monospace;letter-spacing:1px;}
.timer.urgent{background:var(--red);animation:blink 1s infinite;}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.6}}

/* ── Access code display ─────────────────────────────────────────────────── */
.code-box{
  font-size:28px;font-weight:700;letter-spacing:8px;
  color:var(--mid);font-family:'Courier New',monospace;
  background:var(--accent);border:1px dashed #c4b5fd;
  border-radius:8px;padding:14px 24px;text-align:center;
}

/* ── Misc ────────────────────────────────────────────────────────────────── */
.divider{height:1px;background:var(--border);margin:20px 0;}
.text-center{text-align:center;}
.text-muted{color:var(--muted);font-size:12px;}
.mt8{margin-top:8px;}.mt16{margin-top:16px;}.mb16{margin-bottom:16px;}
.gap8{gap:8px;}.flex{display:flex;}.flex-center{display:flex;align-items:center;}
.chip{display:inline-block;background:var(--accent);border:1px solid #c4b5fd;border-radius:5px;padding:2px 9px;font-size:11px;font-weight:700;color:var(--mid);}

/* ── Click-to-answer gaps ─────────────────────────────────────────────────── */
.gap-btn{display:inline-flex;align-items:center;gap:4px;min-width:54px;padding:1px 9px;margin:0 2px;
  border-radius:5px;font-weight:600;font-size:13px;cursor:pointer;
  border:1px dashed #cbd5e1;background:#f8fafc;color:#94a3b8;
  font-family:inherit;line-height:1.5;
  transition:background .12s,border-color .12s,color .12s;vertical-align:baseline;}
.gap-btn:hover{border-color:var(--mid);color:var(--mid);background:#f5f3ff;}
.gap-btn.filled{border-style:solid;border-color:var(--mid);
  background:#f5f3ff;color:var(--mid);}
.gap-btn .gap-num{font-family:monospace;font-weight:700;font-size:11px;color:#94a3b8;}
.gap-btn.filled .gap-num{color:#a78bfa;}
.gap-btn .gap-val{font-weight:600;}
.gap-btn .gap-empty{color:#cbd5e1;letter-spacing:1px;font-weight:400;}

/* Question rows (p5/p6/p8) */
.q-row{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;
  border:1px solid var(--border);border-radius:8px;margin-bottom:8px;
  background:#fff;cursor:pointer;
  transition:border-color .12s,background .12s;}
.q-row:hover{border-color:#94a3b8;background:#faf8ff;}
.q-row.answered{border-color:var(--mid);background:#f5f3ff;}
.q-row .q-num{font-weight:700;color:var(--mid);min-width:24px;font-size:13px;}
.q-row .q-text{flex:1;font-size:13px;line-height:1.55;color:var(--text);}
.q-row .q-ans{font-weight:700;color:var(--mid);min-width:30px;text-align:right;font-size:14px;}
.q-row .q-ans-empty{color:#cbd5e1;font-weight:400;}

/* MC option pills (in popup) */
.mc-pill{display:flex;align-items:center;gap:10px;padding:10px 14px;
  border:1px solid var(--border);border-radius:7px;background:#fff;cursor:pointer;
  font-size:14px;color:var(--text);width:100%;text-align:left;
  font-family:inherit;
  transition:border-color .12s,background .12s;}
.mc-pill:hover{border-color:var(--mid);background:#fafcff;}
.mc-pill.selected{border-color:var(--mid);background:var(--accent);}
.mc-pill .ltr{display:inline-flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:5px;background:var(--accent);
  color:var(--mid);font-weight:700;font-size:12px;flex-shrink:0;}
.mc-pill.selected .ltr{background:var(--mid);color:#fff;}

/* Reading passage */
.passage{background:#fff;padding:18px 22px;border-radius:8px;
  border:1px solid var(--border);font-size:15px;line-height:1.85;
  color:var(--text);max-width:68ch;}
.passage strong.title{display:block;font-weight:700;margin-bottom:10px;font-size:15px;color:var(--text);}

/* Code-style line listing (p7 paragraphs / ec lines) */
.line-list{background:#f8fafc;border:1px solid var(--border);border-radius:8px;padding:14px;
  font-family:'JetBrains Mono','Courier New',monospace;font-size:13px;line-height:2;}
.line-row{display:flex;gap:12px;align-items:center;padding:4px 8px;
  border-radius:5px;cursor:pointer;
  transition:background .12s;}
.line-row:hover{background:#f5f3ff;}
.line-row.answered{background:#f5f3ff;}
.line-row .ln-num{color:var(--mid);font-weight:700;min-width:28px;}
.line-row .ln-text{flex:1;color:var(--text);}
.line-row .ln-ans{color:var(--mid);font-weight:700;font-size:12px;background:#fff;
  border:1px solid var(--border);border-radius:4px;padding:1px 8px;min-width:60px;text-align:center;}
.line-row .ln-ans.empty{color:#cbd5e1;border-style:dashed;}

/* 2-col grid for p6 paragraphs / p8 texts — collapses to 1 col on mobile */
.para-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
@media(max-width:640px){.para-grid{grid-template-columns:1fr;}}

/* Paragraph chips (p6 reference list) */
.para-chip{background:#fff;border:1px solid var(--border);border-radius:7px;padding:10px 12px;
  font-size:12px;line-height:1.6;color:var(--text);cursor:pointer;
  transition:border-color .12s,background .12s;text-align:left;width:100%;font-family:inherit;}
.para-chip:hover{border-color:var(--mid);background:#fafcff;}
.para-chip.selected{border-color:var(--mid);background:var(--accent);}
.para-chip .p-label{display:inline-block;background:var(--accent);color:var(--mid);
  font-weight:700;font-size:11px;padding:1px 7px;border-radius:4px;margin-right:6px;}
.para-chip.selected .p-label{background:var(--mid);color:#fff;}

/* Modal sizes */
.modal-box-xs{max-width:440px;}

/* Exam section card */
.exam-section{background:#fff;border:1px solid var(--border);border-radius:10px;
  padding:22px;margin-bottom:18px;}

/* ── App sidebar layout ──────────────────────────────────────────────────── */
.app-layout{display:flex;min-height:100vh;}
.app-sidebar{
  width:220px;flex-shrink:0;
  background:#fff;border-right:1px solid #e8e8ec;
  display:flex;flex-direction:column;
  position:fixed;top:0;left:0;height:100vh;z-index:300;
  overflow-y:auto;
}
.app-sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid #f1f5f9;}
.app-sidebar-logo{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,#7c3aed,#4c1d95);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:15px;letter-spacing:.5px;
  margin-bottom:10px;
}
.app-sidebar-domain{color:#9ca3af;font-size:9px;letter-spacing:2px;text-transform:uppercase;margin-bottom:2px;}
.app-sidebar-title{color:#0f172a;font-weight:700;font-size:13px;}
.app-sidebar-profile{padding:14px 20px;border-bottom:1px solid #f1f5f9;}
.app-sidebar-name{font-size:13px;font-weight:700;color:#0f172a;margin-bottom:4px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.app-sidebar-nav{flex:1;padding:10px 12px;}
.app-sidebar-link{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:7px;
  font-size:13px;font-weight:600;color:#4a4a4a;
  text-decoration:none;margin-bottom:2px;
  transition:background .12s,color .12s;
}
.app-sidebar-link:hover{background:#f5f3ff;color:var(--mid);}
.app-sidebar-link.active{background:#f5f3ff;color:var(--mid);}
.app-sidebar-link svg,.app-sidebar-link .s-icon{opacity:.65;}
.app-sidebar-link.active svg,.app-sidebar-link.active .s-icon{opacity:1;}
.app-sidebar-footer{padding:16px 12px;border-top:1px solid #f1f5f9;}
.app-main{margin-left:220px;flex:1;min-width:0;}

/* ── Gradient session/level cards ────────────────────────────────────────── */
.card-A2  {background:linear-gradient(135deg,#34d399 0%,#059669 100%);}
.card-B1  {background:linear-gradient(135deg,#fbbf24 0%,#d97706 100%);}
.card-B2  {background:linear-gradient(135deg,#a78bfa 0%,#7c3aed 100%);}
.card-C1  {background:linear-gradient(135deg,#60a5fa 0%,#2563eb 100%);}
.card-FCE {background:linear-gradient(135deg,#f472b6 0%,#db2777 100%);}
.card-CAE {background:linear-gradient(135deg,#818cf8 0%,#4338ca 100%);}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media(max-width:768px){
  .app-sidebar{display:none;}
  .app-main{margin-left:0;}
}
@media(max-width:640px){
  .grid2{grid-template-columns:1fr;}
  .nav-links{display:none;}
  .nav-menu{display:block;}
  .card-head,.card-body{padding:18px 20px;}
  .hide-sm{display:none;}

  /* Passage text: single col, no max-width */
  .passage{max-width:100%;padding:12px 14px;font-size:14px;}

  /* q-rows: wrap answer to new line */
  .q-row{flex-wrap:wrap;}
  .q-row .q-ans{min-width:auto;}

  /* Line rows: allow text wrap */
  .line-row{flex-wrap:wrap;}
  .line-row .ln-text{min-width:0;word-break:break-word;}

  /* Gap buttons: smaller */
  .gap-btn{min-width:44px;font-size:12px;}

  /* Paragraph chips: full width */
  .para-chip{font-size:12px;}

  /* Exam page: tighter padding */
  .exam-wrap{padding:12px 10px 70px;}

  /* Admin table: allow horizontal scroll */
  .tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;}

  /* Inputs full width on mobile */
  .ans-inp{width:100%!important;max-width:100%;}

  /* Modal: full screen feel */
  .modal-overlay{padding:8px;}
  .modal-box{border-radius:10px;}
}