/* QuizArena MVP styles — PHP 7.4 / server-rendered HTML */
:root{--ink:#17213d;--muted:#77839b;--line:#e7eaf2;--surface:#f4f6fb;--card:#fff;--brand:#5b4ee8;--brand-dark:#4034b8;--brand-soft:#efedff;--green:#169878;--green-soft:#e6f8f2;--orange:#d98a25;--orange-soft:#fff4dd;--red:#d95868;--red-soft:#fff0f2;--shadow:0 14px 35px rgba(41,44,92,.07);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--surface);font-size:14px}button,input,select,textarea{font:inherit}button,a{cursor:pointer}a{color:inherit;text-decoration:none}.app-shell{display:flex;min-height:calc(100vh - 38px)}.sidebar{width:244px;flex:0 0 244px;padding:24px 15px;border-right:1px solid var(--line);background:#fff;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:10px;padding:0 12px 30px;font-size:20px;font-weight:850;letter-spacing:-.05em}.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:12px;color:#fff;background:linear-gradient(145deg,#796dff,#4a3bd1);box-shadow:0 8px 18px rgba(91,78,232,.24)}.profile-card{margin:0 4px 27px;padding:11px;border:1px solid #d9efe8;border-radius:13px;background:#f2fcf8;display:flex;align-items:center;gap:10px}.line-avatar{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;color:#fff;background:#06c755;font-size:12px;font-weight:800}.profile-card strong{display:block;font-size:12px}.profile-card small{display:block;margin-top:2px;color:var(--green);font-size:10px}.menu-label{padding:0 12px;margin:0 0 8px;color:#a1a9ba;font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.nav-list{display:grid;gap:4px;margin-bottom:26px}.nav-item{display:flex;align-items:center;gap:11px;padding:11px 12px;border-radius:10px;color:#68748d;font-weight:650;transition:.2s}.nav-item:hover,.nav-item.active{color:var(--brand);background:var(--brand-soft)}.nav-icon{width:19px;color:currentColor;text-align:center;font-size:17px}.sidebar-bottom{margin-top:auto;padding:13px 12px;border-radius:12px;color:#69758c;background:#f8f8fc;font-size:11px;line-height:1.7}.sidebar-bottom strong{display:block;color:var(--ink);font-size:12px}.sidebar-bottom a{color:var(--brand);font-weight:700}.main{min-width:0;flex:1}.topbar{height:73px;padding:0 38px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;gap:18px}.breadcrumb{color:var(--muted);font-size:12px}.breadcrumb strong{color:var(--ink)}.top-actions{display:flex;align-items:center;gap:12px}.line-login{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 14px;border:0;border-radius:9px;color:#fff;background:#06c755;font-size:12px;font-weight:750}.line-login:hover{background:#05a948}.line-login.compact{padding:8px 12px}.content{max-width:1480px;margin:0 auto;padding:32px 38px 50px}.page-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:25px}.eyebrow{color:var(--brand);font-size:10px;font-weight:850;letter-spacing:.1em;text-transform:uppercase}h1{margin:5px 0 7px;font-size:clamp(25px,3vw,34px);letter-spacing:-.055em}.page-heading p{margin:0;color:var(--muted)}.mock-badge{display:inline-flex;align-items:center;gap:7px;padding:7px 11px;border:1px solid #f3d79d;border-radius:20px;color:#805d1d;background:#fff9e9;font-size:11px;font-weight:750;white-space:nowrap}.mock-badge:before{content:"";width:7px;height:7px;border-radius:50%;background:#e6a32e}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:9px;padding:10px 14px;font-weight:750;transition:.2s}.primary-button{border:0;color:#fff;background:var(--brand);box-shadow:0 7px 15px rgba(91,78,232,.17)}.primary-button:hover{background:var(--brand-dark);transform:translateY(-1px)}.secondary-button{border:1px solid var(--line);color:#67738b;background:#fff}.secondary-button:hover{color:var(--brand);border-color:#bcb7ff}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin-bottom:25px}.stat-card{min-height:119px;padding:17px;border:1px solid var(--line);border-radius:14px;background:var(--card);box-shadow:var(--shadow)}.stat-label{display:block;color:var(--muted);font-size:11px}.stat-value{display:block;margin-top:10px;font-size:25px;letter-spacing:-.05em}.stat-note{display:block;margin-top:5px;color:var(--green);font-size:10px;font-weight:750}.panel{border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow)}.panel-header{padding:19px 21px 15px;display:flex;align-items:center;justify-content:space-between;gap:15px}.panel-header h2{margin:0;font-size:16px;letter-spacing:-.025em}.panel-header p{margin:4px 0 0;color:var(--muted);font-size:11px}.exam-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;padding:0 21px 21px}.exam-card{padding:16px;border:1px solid var(--line);border-radius:12px;transition:.2s}.exam-card:hover{border-color:#bdb8ff;box-shadow:0 7px 17px rgba(91,78,232,.08)}.exam-heading{display:flex;align-items:flex-start;gap:10px}.exam-emblem{width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;border-radius:10px;color:var(--brand);background:var(--brand-soft);font-size:19px}.exam-heading h3{margin:1px 0 5px;font-size:13px}.exam-heading p{margin:0;color:var(--muted);font-size:10px}.status{display:inline-flex;align-items:center;justify-content:center;padding:5px 8px;border:0;border-radius:7px;font-size:10px;font-weight:750;white-space:nowrap}.status.open{color:var(--green);background:var(--green-soft)}.status.closed{color:var(--muted);background:#f0f2f6}.exam-heading .status{margin-left:auto}.exam-description{min-height:31px;margin:14px 0 12px;color:#5d6a83;font-size:11px;line-height:1.55}.exam-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;color:var(--muted);font-size:10px}.exam-footer{display:flex;align-items:center;justify-content:space-between;gap:10px}.small-muted{color:var(--muted);font-size:11px}.state{padding:42px 20px;color:var(--muted);text-align:center}.state-icon{width:45px;height:45px;display:grid;place-items:center;margin:0 auto 11px;border-radius:14px;color:var(--brand);background:var(--brand-soft);font-size:22px}.state h3{margin:0 0 5px;color:var(--ink);font-size:15px}.state p{max-width:320px;margin:0 auto 15px;font-size:12px}.alert{margin-bottom:18px;padding:12px 15px;border:1px solid;border-radius:10px;font-size:12px}.alert-success{border-color:#bfe8dc;color:#167764;background:#effdf8}.alert-danger{border-color:#f2c6cc;color:#ad3f4e;background:#fff3f4}.alert-warning{border-color:#f3dfb3;color:#94661d;background:#fffaf0}.exam-form .panel{overflow:hidden}.question-list{display:grid;gap:14px;padding:0 21px 20px}.question-box{margin:0;padding:17px;border:1px solid var(--line);border-radius:12px}.question-box legend{padding:0 8px 0 0}.question-number{display:inline-block;margin-right:6px;color:var(--ink);font-weight:800}.question-type{display:inline-block;padding:5px 7px;border-radius:6px;color:var(--brand);background:var(--brand-soft);font-size:10px;font-weight:750}.question-type.essay{color:var(--orange);background:var(--orange-soft)}.question-box h3{margin:11px 0 15px;font-size:14px;line-height:1.55}.option-list{display:grid;gap:8px}.option{display:flex;align-items:center;gap:9px;padding:11px;border:1px solid var(--line);border-radius:9px;color:#5f6c83;background:#fff;font-size:12px}.option:hover{border-color:#aaa5ff;color:var(--brand);background:#faf9ff}.option input{accent-color:var(--brand)}.essay-input{width:100%;resize:vertical;border:1px solid var(--line);border-radius:9px;padding:11px;outline:0;color:var(--ink)}.essay-input:focus{border-color:#aaa5ff;box-shadow:0 0 0 3px rgba(91,78,232,.08)}.form-actions{padding:16px 21px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}.timer{padding:8px 10px;border-radius:8px;color:var(--red);background:var(--red-soft);font-size:11px;font-weight:800}.result-layout{display:grid;grid-template-columns:minmax(280px,.65fr) minmax(0,1.35fr);gap:20px}.result-panel{padding:30px;text-align:center}.result-medal{width:62px;height:62px;display:grid;place-items:center;margin:0 auto 14px;border-radius:50%;color:#d18b22;background:#fff2ce;font-size:30px}.result-panel h2{margin:0 0 4px;font-size:21px}.score-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:22px 0}.score-box{padding:13px 8px;border-radius:9px;background:#f7f7fc}.score-box.highlight{color:var(--brand);background:var(--brand-soft)}.score-box strong{display:block;font-size:19px}.score-box span{color:var(--muted);font-size:10px}.leaderboard-table{padding:0 21px 20px}.rank-row{display:grid;grid-template-columns:35px 1fr auto;gap:9px;align-items:center;padding:13px 0;border-bottom:1px solid #f0f1f6;font-size:12px}.rank-row.current{margin:0 -10px;padding-left:10px;padding-right:10px;border-radius:8px;background:#f7f6ff}.rank-number{color:#9ca5b8;font-weight:800}.rank-row>span:last-child{color:var(--brand);font-weight:800}.admin-tabs{display:flex;gap:6px;margin-bottom:18px;border-bottom:1px solid var(--line)}.admin-tabs a{padding:10px 14px;color:var(--muted);font-size:12px;font-weight:750}.admin-tabs a.active{border-bottom:2px solid var(--brand);color:var(--brand)}.admin-tabs span{padding:2px 5px;border-radius:10px;color:var(--orange);background:var(--orange-soft);font-size:10px}.admin-columns{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:20px;align-items:start}.admin-side{display:grid;gap:15px}.side-card{padding:18px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow)}.side-card h2{margin:0 0 14px;font-size:14px}.table-wrap{overflow-x:auto}.data-table{width:100%;min-width:590px;border-collapse:collapse}.data-table th{padding:12px 20px;color:#9da6b7;font-size:10px;letter-spacing:.07em;text-align:left;text-transform:uppercase}.data-table td{padding:14px 20px;border-top:1px solid #f0f1f6;color:#5e6b84;font-size:11px;vertical-align:middle}.data-table td strong{display:block;color:var(--ink);font-size:12px}.data-table td small{display:block;margin-top:3px;color:var(--muted);font-size:10px}.inline-form{margin:0}.stack-form,.question-admin-form{display:grid;gap:11px}.stack-form label,.question-admin-form label,.grade-form label{display:grid;gap:5px;color:#69758c;font-size:11px;font-weight:650}.stack-form input,.stack-form textarea,.stack-form select,.question-admin-form input,.question-admin-form textarea,.question-admin-form select,.grade-form input{width:100%;border:1px solid var(--line);border-radius:8px;padding:9px;outline:0;color:var(--ink);background:#fff;font-size:12px}.stack-form input:focus,.stack-form textarea:focus,.stack-form select:focus,.question-admin-form input:focus,.question-admin-form textarea:focus,.question-admin-form select:focus{border-color:#aaa5ff;box-shadow:0 0 0 3px rgba(91,78,232,.08)}.question-manager{margin-top:20px}.question-admin-form{grid-template-columns:1fr 1fr 120px;padding:0 21px 21px}.question-admin-form .full{grid-column:1/-1}.option-inputs{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.grading-list{display:grid;gap:12px;padding:0 21px 21px}.grading-card{padding:16px;border:1px solid var(--line);border-radius:12px}.grading-header{display:flex;justify-content:space-between;gap:10px;font-size:11px}.grading-header span{color:var(--muted)}.grading-card h3{margin:12px 0 9px;font-size:13px;line-height:1.55}.answer-text{margin:0 0 14px;padding:12px;border-radius:8px;color:#5d6a83;background:#f8f8fc;font-size:12px;line-height:1.65}.grade-form{display:flex;align-items:end;justify-content:flex-end;gap:9px}.grade-form label{width:125px}.site-footer{min-height:38px;padding:11px 20px;color:#8992a4;background:#fff;border-top:1px solid var(--line);font-size:10px;text-align:center}.login-layout{min-height:calc(100vh - 170px);display:grid;grid-template-columns:minmax(0,1fr) 410px;align-items:center;gap:70px;max-width:1000px;margin:0 auto}.login-copy{padding:20px}.login-copy h1{font-size:clamp(35px,5vw,58px);line-height:1.05}.login-copy p{max-width:480px;color:var(--muted);font-size:16px;line-height:1.7}.login-features{display:grid;gap:10px;margin-top:26px;color:#59667e;font-size:13px}.login-card{padding:35px 30px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow);text-align:center}.login-logo{width:54px;height:54px;display:grid;place-items:center;margin:0 auto 17px;border-radius:17px;color:#fff;background:linear-gradient(145deg,#796dff,#4a3bd1);font-size:25px;font-weight:800}.login-card h2{margin:0 0 6px;font-size:23px}.login-card p{margin:0 0 22px;color:var(--muted);font-size:12px}.login-button{width:100%;padding:13px}.demo-divider{display:flex;align-items:center;gap:10px;margin:24px 0 13px;color:#a3aaba;font-size:10px}.demo-divider:before,.demo-divider:after{content:"";height:1px;flex:1;background:var(--line)}.demo-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.hint{display:block;margin-top:14px;color:#9aa4b7;font-size:10px}.standalone-state{max-width:520px;margin:15vh auto;padding:40px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow);text-align:center}.standalone-state h1{font-size:25px}.standalone-state p{color:var(--muted);line-height:1.7}.standalone-state small{color:var(--muted)}.hidden{display:none!important}
@media(max-width:1050px){.sidebar{width:215px;flex-basis:215px}.content,.topbar{padding-left:24px;padding-right:24px}.result-layout,.admin-columns{grid-template-columns:1fr}.login-layout{gap:30px;padding:0 25px}}@media(max-width:760px){.sidebar{display:none}.topbar{height:auto;padding-top:16px;padding-bottom:16px}.content{padding:24px 15px 40px}.page-heading{display:block}.page-heading .mock-badge{display:inline-flex;margin-top:15px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:10px}.exam-grid{grid-template-columns:1fr;padding-left:15px;padding-right:15px}.panel-header{padding-left:15px;padding-right:15px}.question-list,.leaderboard-table,.grading-list{padding-left:15px;padding-right:15px}.form-actions{padding-left:15px;padding-right:15px;align-items:flex-start;flex-direction:column}.question-admin-form{grid-template-columns:1fr;padding-left:15px;padding-right:15px}.question-admin-form .full{grid-column:auto}.option-inputs{grid-template-columns:1fr}.login-layout{min-height:auto;display:block;padding:35px 15px}.login-copy{padding:0 0 25px}.login-copy h1{font-size:38px}.login-card{max-width:450px;margin:0 auto}.exam-footer{align-items:flex-start;flex-direction:column}.exam-footer .primary-button,.exam-footer .secondary-button{width:100%}.score-summary{grid-template-columns:1fr}.grade-form{align-items:stretch;flex-direction:column}.grade-form label{width:100%}}