:root{
  --navy:#00253d;--navy-2:#003b63;--blue:#0099df;--sky:#e8f8fe;--line:#cfe5ef;--bg:#f4fbfe;--card:#ffffff;--text:#0a2438;--muted:#5d7588;--good:#007ab8;--bad:#c43d3d;--warn:#b7791f;--shadow:0 20px 60px rgba(0,37,61,.12);--radius:22px;
}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,select{font:inherit}button{cursor:pointer}.app-shell{display:grid;grid-template-columns:310px 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,var(--navy),#00192c 58%, var(--navy-2) 100%);color:#fff;padding:28px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:26px}.brand{display:flex;gap:14px;align-items:center}.brand-mark{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:#fff;color:var(--navy);font-weight:900;letter-spacing:.5px}.brand strong{display:block;font-size:18px}.brand span{display:block;color:#b8c6db;font-size:13px;margin-top:3px}.nav-tabs{display:flex;flex-direction:column;gap:10px}.tab-btn{border:0;text-align:left;border-radius:16px;padding:14px 16px;background:rgba(255,255,255,.06);color:#dbe8ff;transition:.2s}.tab-btn:hover,.tab-btn.active{background:linear-gradient(90deg,#ffffff,#ebfafe);color:var(--navy);transform:translateX(3px)}.side-card{margin-top:auto;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:18px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:11px;color:#2d8fb8;font-weight:800;margin:0 0 8px}.side-card .eyebrow{color:#b8d5ff}.progress-ring{width:92px;height:92px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--blue) var(--deg,0deg),rgba(255,255,255,.15) 0);margin:14px 0}.progress-ring span{width:70px;height:70px;border-radius:50%;display:grid;place-items:center;background:var(--navy);font-weight:900}.side-card p{color:#c4d2e8;font-size:13px;line-height:1.45;margin:0}.content{padding:34px;max-width:1500px;width:100%;margin:0 auto}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}.topbar h1{font-size:clamp(28px,4vw,48px);line-height:1.05;margin:0;letter-spacing:-.04em;color:var(--navy)}.top-actions{display:flex;gap:10px;align-items:center}.hero-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:24px}.metric-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 30px rgba(16,32,51,.05)}.metric-card span{display:block;color:var(--muted);font-size:13px}.metric-card strong{display:block;font-size:32px;margin-top:8px;letter-spacing:-.03em}.tab-panel{display:none}.tab-panel.active{display:block}.panel-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:18px;box-shadow:0 10px 30px rgba(16,32,51,.04)}.panel-heading h2{font-size:28px;margin:0 0 6px}.panel-heading p{margin:0;color:var(--muted);line-height:1.45}.filters{display:flex;gap:10px}.compact-filters{min-width:min(520px,100%)}select,input{border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px 14px;color:var(--text);outline:none}input{min-width:210px}.learn-layout{display:grid;grid-template-columns:360px 1fr;gap:18px}.question-list{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px;height:680px;overflow:auto}.list-item{width:100%;border:0;background:#fff;border-radius:16px;text-align:left;padding:13px 14px;margin-bottom:8px;border:1px solid transparent;display:flex;gap:10px;align-items:flex-start}.list-item:hover,.list-item.active{background:var(--sky);border-color:#c6ddff}.list-num{flex:0 0 auto;background:var(--navy);color:white;border-radius:999px;font-size:12px;font-weight:800;padding:4px 8px}.list-body{font-size:13px;color:#2a3b50;line-height:1.35}.list-meta{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap}.pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 8px;background:#edf3fb;color:#47627e;font-size:11px;font-weight:700}.pill.good{background:#e6f7ef;color:var(--good)}.pill.image{background:#fff5d6;color:#8a650e}.question-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);min-height:420px}.question-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;margin-bottom:18px}.question-head h3{font-size:24px;line-height:1.2;margin:0}.question-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.question-image-wrap{background:#f8fafc;border:1px solid var(--line);border-radius:18px;padding:16px;margin:16px 0;display:flex;justify-content:center;align-items:center;min-height:120px}.question-image{max-width:min(520px,100%);max-height:300px;object-fit:contain;border-radius:10px}.answers{display:grid;gap:10px;margin-top:18px}.answer-btn{width:100%;border:1px solid var(--line);background:#fff;border-radius:16px;padding:15px;text-align:left;display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;transition:.16s}.answer-btn:hover{border-color:#9dc4ff;background:#f6faff}.answer-btn.selected{border-color:var(--blue);background:#eef6ff;box-shadow:0 0 0 3px rgba(21,101,216,.12)}.answer-btn.selected .letter{background:var(--blue);color:#fff}.letter{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#eef3fb;font-weight:900;color:var(--navy)}.answer-btn.correct{border-color:#9ee3c0;background:#effbf5}.answer-btn.correct .letter{background:var(--good);color:#fff}.answer-btn.wrong{border-color:#f1b2b2;background:#fff4f4}.answer-btn.wrong .letter{background:var(--bad);color:#fff}.explanation{margin-top:18px;border-radius:18px;background:#f6f9ff;border:1px solid #dbeaff;padding:18px;line-height:1.55}.explanation strong{color:var(--navy)}.explanation ul{margin:10px 0 0;padding-left:20px}.card-actions{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}button.primary,button.secondary,button.ghost,button.success,button.danger{border:0;border-radius:14px;padding:12px 16px;font-weight:800}button.primary{background:linear-gradient(135deg,var(--blue),var(--navy-2));color:#fff}button.secondary{background:#eef3fb;color:var(--navy)}button.ghost{background:#fff;border:1px solid var(--line);color:var(--navy)}button.success{background:linear-gradient(135deg,var(--navy-2),var(--blue));color:#fff}button.danger{background:var(--bad);color:#fff}button.large{font-size:17px;padding:16px 22px}.flash-area{max-width:860px;margin:0 auto}.flash-progress{display:flex;justify-content:space-between;color:var(--muted);font-weight:800;margin:10px 0 14px}.flash-card{width:100%;min-height:430px;border:0;background:linear-gradient(145deg,#fff,#f7fbff);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:30px;padding:34px;text-align:left;color:var(--text);transition:.22s}.flash-card:hover{transform:translateY(-2px)}.flash-inner{display:flex;flex-direction:column;gap:14px;height:100%}.flash-title{font-size:26px;line-height:1.25;font-weight:900}.flash-hint{color:var(--muted);font-weight:700}.flash-answer{font-size:22px;font-weight:900;color:var(--good)}.flash-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}.exam-setup{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;align-items:end;box-shadow:0 10px 30px rgba(16,32,51,.05)}.exam-setup label{font-weight:800;color:#32465d;display:grid;gap:8px}.hidden{display:none!important}.exam-toolbar{background:var(--navy);color:#fff;border-radius:20px;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.exam-toolbar div{display:flex;gap:16px;align-items:center}.exam-toolbar span{background:rgba(255,255,255,.12);padding:8px 10px;border-radius:999px}.exam-grid{display:grid;grid-template-columns:260px 1fr;gap:18px}.exam-nav{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;display:grid;grid-template-columns:repeat(5,1fr);gap:8px;align-content:start;max-height:650px;overflow:auto}.exam-nav button{border:1px solid var(--line);background:#fff;border-radius:12px;height:42px;font-weight:900;color:var(--navy)}.exam-nav button.active{background:var(--blue);color:#fff;border-color:var(--blue)}.exam-nav button.answered{background:#e6f7ef;border-color:#a8e3c2}.exam-result{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.score-big{font-size:54px;font-weight:950;letter-spacing:-.05em;margin:0}.review-list{display:grid;gap:12px;margin-top:20px}.review-item{border:1px solid var(--line);border-radius:18px;padding:16px;background:#fff}.database-list{display:grid;gap:12px}.db-item{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px}.db-item h3{margin:0 0 12px;font-size:18px}.db-options{display:grid;gap:6px;margin-top:10px}.db-options div{padding:9px 11px;border-radius:12px;background:#f8fafc}.db-options div.correct{background:#e6f7ef;color:#075d3d;font-weight:800}.toast{position:fixed;bottom:24px;right:24px;transform:translateY(120px);transition:.25s;background:var(--navy);color:#fff;padding:14px 18px;border-radius:14px;box-shadow:var(--shadow);font-weight:800;z-index:50}.toast.show{transform:translateY(0)}
@media(max-width:1100px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.nav-tabs{display:grid;grid-template-columns:repeat(4,1fr)}.side-card{display:none}.hero-grid{grid-template-columns:repeat(2,1fr)}.learn-layout,.exam-grid{grid-template-columns:1fr}.question-list{height:300px}.exam-setup{grid-template-columns:1fr 1fr}.panel-heading{align-items:stretch;flex-direction:column}.compact-filters{min-width:0}.filters{flex-direction:column}.exam-nav{grid-template-columns:repeat(10,1fr)}}
@media(max-width:640px){.content{padding:18px}.sidebar{padding:20px}.nav-tabs{grid-template-columns:1fr 1fr}.hero-grid{grid-template-columns:1fr}.topbar{flex-direction:column}.question-card{padding:18px}.question-head h3,.flash-title{font-size:20px}.answer-btn{grid-template-columns:34px 1fr}.letter{width:34px;height:34px}.exam-setup{grid-template-columns:1fr}.exam-nav{grid-template-columns:repeat(6,1fr)}input{min-width:0}.flash-card{padding:22px;min-height:380px}}

/* Branding and palette aligned to logo */
.brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.brand-logo{display:block;max-width:220px;width:100%;height:auto;object-fit:contain;filter:drop-shadow(0 8px 22px rgba(0,0,0,.18))}
.brand-copy strong{display:block;font-size:16px;letter-spacing:.08em;text-transform:uppercase}
.brand-copy span{display:block;color:#b9d8e8;font-size:12px;margin-top:4px;letter-spacing:.1em;text-transform:uppercase;line-height:1.45}
.metric-card,.panel-heading,.question-card,.exam-result,.exam-setup,.db-item,.question-list,.exam-nav{border-color:var(--line)}
.metric-card strong,.score-big,.flash-answer{color:var(--navy)}
.panel-heading{background:linear-gradient(180deg,#ffffff 0%, #fbfeff 100%)}
.question-image-wrap,.flash-card{background:linear-gradient(180deg,#fafdff 0%, #f3fbfe 100%)}
.answer-btn.selected{box-shadow:0 0 0 3px rgba(0,153,223,.14)}
.explanation{background:#f3fbfe;border-color:#d7edf6}
.exam-toolbar{background:linear-gradient(135deg,var(--navy),var(--navy-2))}
@media(max-width:1100px){.brand-logo{width:190px}}
@media(max-width:640px){.brand-logo{width:180px}}


.student-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:16px;color:#fff}
.student-card strong{display:block;font-size:20px;line-height:1.2;margin-bottom:6px}
.student-card p{color:#c4d2e8;font-size:13px;line-height:1.45;margin:0 0 12px}
button.small{padding:9px 12px;font-size:13px;border-radius:12px}
.student-card button.secondary{background:#ebfafe;color:var(--navy);width:100%}
@media(max-width:1100px){.student-card{display:none}}


/* User login */
.login-overlay{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 20% 20%,rgba(0,153,223,.22),transparent 30%),linear-gradient(135deg,var(--navy),#001726 65%,var(--navy-2));}
.login-card{width:min(520px,100%);background:#fff;border:1px solid rgba(255,255,255,.5);border-radius:30px;padding:32px;box-shadow:0 30px 100px rgba(0,0,0,.32)}
.login-logo{display:block;width:260px;max-width:100%;height:auto;margin:0 0 22px}
.login-card h1{margin:0 0 8px;color:var(--navy);font-size:34px;letter-spacing:-.04em}
.login-muted,.login-note{color:var(--muted);line-height:1.5;margin:0 0 18px}
.login-note{font-size:13px;margin-top:18px}
.login-form{display:grid;gap:14px;margin:18px 0 22px}
.login-form label{display:grid;gap:8px;font-weight:900;color:var(--navy)}
.login-form input{width:100%;min-width:0;font-size:18px}
.saved-users{border-top:1px solid var(--line);padding-top:18px}
.saved-users-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.saved-user-btn{border:1px solid var(--line);background:#f3fbfe;color:var(--navy);border-radius:999px;padding:10px 14px;font-weight:900}
.student-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:18px}
.student-card strong{display:block;font-size:20px;margin-bottom:6px}
.student-card p{color:#c4d2e8;font-size:13px;line-height:1.45;margin:0 0 12px}
button.small{padding:9px 12px;font-size:13px}
.login-required .app-shell{filter:blur(2px);pointer-events:none;user-select:none}
@media(max-width:640px){.login-card{padding:24px;border-radius:24px}.login-card h1{font-size:28px}.login-logo{width:220px}}


/* ---- Fixes: visible logo + updated branding ---- */
.brand-logo,
.login-logo{
  background: rgba(255,255,255,.98);
  padding: 14px 18px;
  border-radius: 22px;
  box-shadow: 0 12px 30px rgba(0,0,0,.22);
}
.brand-logo{
  width: min(240px, 100%);
}
.login-logo{
  width: min(280px, 100%);
  margin-bottom: 22px;
}
.brand-copy strong{font-size:15px}
.brand-copy span{color:#d7ecf7}

/* ---- Admin panel ---- */
.nav-tabs{gap:9px}
.admin-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:16px}
.admin-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.admin-table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:auto;box-shadow:0 10px 30px rgba(0,37,61,.06)}
.admin-table{width:100%;border-collapse:collapse;min-width:880px}
.admin-table th,.admin-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
.admin-table th{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:#2d8fb8;background:#f3fbfe}
.admin-table td span{color:var(--muted);font-size:12px}
button.small{padding:8px 11px;border-radius:11px;font-size:12px}
@media(max-width:1100px){.admin-grid{grid-template-columns:1fr}}


/* ---- Better logo visibility without white box ---- */
.sidebar{
  background:
    radial-gradient(circle at 18% 8%, rgba(202,242,255,.98) 0, rgba(133,212,246,.95) 12%, rgba(0,153,223,.30) 26%, transparent 42%),
    linear-gradient(180deg, #0a3d66 0%, #00253d 36%, #00192c 68%, #003b63 100%) !important;
}
.brand{
  width:100%;
  padding:18px 16px 14px;
  border-radius:28px;
  background:linear-gradient(180deg, rgba(204,240,252,.86) 0%, rgba(130,208,244,.52) 34%, rgba(0,0,0,0) 100%);
}
.login-card{
  background:linear-gradient(180deg, #dff5fd 0%, #f6fcff 28%, #ffffff 48%) !important;
}
.brand-logo,
.login-logo{
  background:transparent !important;
  padding:0 !important;
  border-radius:0 !important;
  box-shadow:none;
  filter:drop-shadow(0 10px 18px rgba(0,0,0,.18));
}
.brand-copy strong{color:#fff; text-shadow:0 1px 2px rgba(0,0,0,.18)}
.brand-copy span{color:#e5f6fd}

/* ---- Admin access + responsive panel ---- */
.admin-only.hidden{display:none !important}
.top-actions{flex-wrap:wrap}
#adminAccessBtn{width:100%; margin-top:8px}
.admin-cards{display:none; gap:12px; margin-bottom:14px}
.admin-card-mobile{background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px; box-shadow:0 10px 26px rgba(0,37,61,.06)}
.admin-card-head{display:flex; justify-content:space-between; gap:12px; align-items:flex-start; margin-bottom:12px}
.admin-card-head strong{font-size:18px; color:var(--navy)}
.admin-card-head span{font-size:12px; color:var(--muted)}
.admin-kv{display:flex; justify-content:space-between; gap:12px; padding:8px 0; border-top:1px solid #eef4f8}
.admin-kv:first-of-type{border-top:0; padding-top:0}
.admin-kv span{color:var(--muted); font-size:13px}
.admin-kv strong{color:var(--navy); font-size:14px; text-align:right}
.admin-empty{background:#fff; border:1px dashed var(--line); border-radius:18px; padding:18px; color:var(--muted)}
@media(max-width:1100px){
  .nav-tabs{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .admin-grid{grid-template-columns:1fr}
  .admin-table-wrap{display:none}
  .admin-cards{display:grid}
  .admin-actions{flex-direction:column}
  .admin-actions button{width:100%}
  .top-actions{width:100%}
  .top-actions .ghost{flex:1 1 auto}
}

/* ---- Official-site package + question editor ---- */
.editor-panel{margin-top:22px}
.editor-heading{margin-top:0}
.editor-layout{display:grid;grid-template-columns:360px 1fr;gap:18px}
.editor-question-list{height:620px}
.question-editor-form{display:grid;gap:14px}
.question-editor-form label{display:grid;gap:8px;font-weight:900;color:var(--navy)}
.question-editor-form textarea{border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;resize:vertical;min-width:0}
.editor-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.editor-actions{display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:900px){
  .editor-layout{grid-template-columns:1fr}
  .editor-question-list{height:320px}
  .editor-options{grid-template-columns:1fr}
  .editor-actions{flex-direction:column}
  .editor-actions button{width:100%}
}


/* Logo / brand click redirects to main website */
.brand-home-link,
.login-logo-link{
  color: inherit;
  text-decoration: none;
}
.brand-home-link{
  cursor: pointer;
  transition: transform .18s ease, filter .18s ease;
}
.brand-home-link:hover{
  transform: translateY(-2px);
  filter: brightness(1.04);
}
.login-logo-link{
  display:inline-block;
}


/* Update: simplified learning base and fixed trial exam */
.top-guarantee{margin:14px 0 0;color:var(--navy);font-weight:900;background:#e9f8ff;border:1px solid #c8eafb;padding:12px 14px;border-radius:16px;max-width:920px}
.exam-setup-fixed{grid-template-columns:2fr 1fr auto}
.exam-fixed-info{background:#f3fbfe;border:1px solid var(--line);border-radius:18px;padding:16px}
.exam-fixed-info strong{display:block;font-size:22px;color:var(--navy);margin:4px 0 6px}
.exam-fixed-info p{margin:0;color:var(--muted);line-height:1.45}
@media(max-width:900px){.exam-setup-fixed{grid-template-columns:1fr}.top-guarantee{font-size:14px}}