:root{--ink:#172b3a;--muted:#667987;--blue:#176b87;--blue2:#0f526b;--pale:#eaf3f5;--line:#dce5e8;--paper:#fff;--bg:#f5f8f9;--green:#18794e;--red:#b42318}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,'Segoe UI',Arial,sans-serif;font-size:15px;line-height:1.65}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{font-family:Manrope,'DM Sans',sans-serif;line-height:1.2;letter-spacing:-.025em}h1{font-size:clamp(2rem,4vw,3.35rem);margin:10px 0 14px}h2{font-size:1.7rem;margin:0 0 18px}h3{font-size:1.15rem}.container{width:min(1120px,calc(100% - 40px));margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav-wrap{width:min(1180px,calc(100% - 40px));margin:auto;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-family:Manrope;font-weight:800;letter-spacing:.02em}.brand small{display:block;font:600 9px 'DM Sans';letter-spacing:.16em;color:var(--muted)}.brand-mark{background:var(--blue);color:#fff;border-radius:9px;padding:10px 9px;font-size:14px}.site-header nav{display:flex;align-items:center;gap:25px}.site-header nav a{font-size:13px;font-weight:600;color:#415665}.site-header nav .nav-cta{background:var(--blue);color:#fff;padding:10px 17px;border-radius:6px}.menu-toggle{display:none;background:none;border:0;font-size:24px}.hero{margin:36px 0 24px;background:#eaf2f3;border-radius:15px;display:grid;grid-template-columns:1.15fr .85fr;overflow:hidden;min-height:400px}.hero-copy{padding:58px 52px}.eyebrow{display:block;font-size:10px;font-weight:700;letter-spacing:.18em;color:var(--blue);text-transform:uppercase}.hero h1{font-size:clamp(2.4rem,5vw,4.1rem);max-width:620px}.hero h1 em{font-style:normal;color:var(--blue)}.hero-copy>p{max-width:550px;color:#526876;font-size:16px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:27px 0 19px}.hero-note,.small,.muted{font-size:12px;color:var(--muted)}.hero-panel{background:#173849;color:#d9e9ed;padding:45px 35px;display:flex;flex-direction:column;justify-content:center;align-items:center}.hero-panel p{font-family:Manrope;font-size:13px;letter-spacing:.04em}.radio-art{width:min(310px,100%);height:210px;background:linear-gradient(145deg,#283d49,#101d25);border:7px solid #42545c;border-radius:17px;padding:20px;box-shadow:0 22px 35px #07151c66;position:relative}.radio-label{font:700 10px Manrope;letter-spacing:.2em;color:#9cb3bc}.radio-screen{margin-top:20px;background:#09191a;border:2px solid #53666b;border-radius:5px;padding:12px 14px;color:#8ee3bd;font:700 30px monospace;display:flex;justify-content:space-between;align-items:center}.radio-screen small{font:10px monospace;color:#7ba997}.radio-dial{position:absolute;right:25px;bottom:17px;width:38px;height:38px;border:5px solid #6b7c83;border-radius:50%;background:#17252c}.radio-bars{position:absolute;left:24px;bottom:27px;display:flex;gap:4px;align-items:end}.radio-bars i{width:5px;background:#5bc99b;height:9px;border-radius:2px}.radio-bars i:nth-child(2n){height:16px}.radio-bars i:nth-child(3n){height:22px}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px;margin:0 0 65px}.stats-row div{text-align:center;border-right:1px solid var(--line)}.stats-row div:last-child{border:0}.stats-row strong{display:block;font:800 24px Manrope;color:var(--blue)}.stats-row span{font-size:12px;color:var(--muted)}.section{margin:55px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-heading h2{margin:5px 0 0}.section-heading>a{font-size:13px;font-weight:700}.feature-grid,.admin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:25px;display:block;color:var(--ink);transition:.18s}.feature-card:hover{border-color:#8eb4c0;transform:translateY(-2px);text-decoration:none}.feature-icon{display:inline-flex;width:38px;height:38px;border-radius:8px;background:var(--pale);color:var(--blue);align-items:center;justify-content:center;font:700 12px Manrope}.feature-card h3{margin:18px 0 8px}.feature-card p{margin:0;color:var(--muted);font-size:13px}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.category-grid a{display:flex;justify-content:space-between;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--ink);font-weight:600;font-size:13px}.category-grid b{color:var(--blue)}.callout{margin:60px 0;background:#173849;color:#fff;border-radius:12px;padding:32px 38px;display:flex;justify-content:space-between;align-items:center;gap:25px}.callout .eyebrow{color:#91c6d2}.callout h2{margin:7px 0}.callout p{color:#c4d5db;margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:6px;padding:12px 19px;font:700 13px 'DM Sans';cursor:pointer;text-decoration:none;min-height:43px}.btn:hover{background:var(--blue2);color:#fff;text-decoration:none}.btn-outline{background:transparent;color:var(--blue)}.btn-outline:hover{background:var(--pale);color:var(--blue2)}.btn-small{padding:8px 13px;min-height:35px}.full{width:100%}.page-intro{padding:48px 0 25px}.page-intro h1{font-size:2.7rem}.page-intro p{color:var(--muted);max-width:700px}.filter-bar{display:flex;gap:10px;background:#fff;border:1px solid var(--line);padding:12px;border-radius:8px;margin:10px 0 18px}.filter-bar input{flex:1}.filter-bar input,.filter-bar select,input,select,textarea{font:inherit;color:var(--ink);border:1px solid #cbd8dd;border-radius:6px;padding:11px 12px;background:#fff;min-width:0}.filter-bar select{min-width:210px}.result-count{font-size:12px;color:var(--muted)}.question-card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:22px 24px;margin:14px 0}.question-meta{display:flex;justify-content:space-between;gap:12px;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.question-card h3,.exam-question h3{font-size:16px;line-height:1.55;margin:15px 0}.options{padding-left:27px;margin:0}.options li{padding:7px 10px;margin:4px 0;border-radius:5px;font-size:14px}.options li.correct{background:#e8f5ee;color:#155e3b}.options li.wrong{background:#fff0ee;color:#a12b21}.options strong{font-size:11px;margin-left:8px}.explanation{border-top:1px solid var(--line);margin-top:15px;padding-top:13px;color:#536774;font-size:13px}.inline-form{display:inline}.link-button{border:0;background:none;color:var(--blue);padding:5px 0;cursor:pointer;font:600 12px 'DM Sans'}.danger{color:var(--red)}.pagination{display:flex;gap:6px;justify-content:center;margin:28px}.pagination a{background:#fff;border:1px solid var(--line);padding:7px 12px;border-radius:5px}.pagination a.current{background:var(--blue);color:#fff}.panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:27px}.form-panel{max-width:760px;margin:20px 0 65px}.form-panel h2{font-size:21px}.form-panel label,.auth-card label{display:block;font-size:12px;font-weight:700;color:#425967;margin:15px 0}.form-panel input,.form-panel select,.form-panel textarea,.auth-card input{display:block;width:100%;margin-top:7px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.check-label{display:flex!important;align-items:center;gap:9px}.check-label input{width:auto;margin:0}.auth-wrap{min-height:65vh;display:grid;place-items:center;padding:45px 0}.auth-card{width:min(450px,100%);background:#fff;border:1px solid var(--line);border-radius:12px;padding:34px}.auth-card h1{font-size:2rem}.auth-card>p{color:var(--muted);font-size:13px}.auth-card form{margin-top:25px}.auth-foot{text-align:center;margin-top:20px}.notice{padding:13px 16px;border-radius:7px;margin:18px 0;font-size:13px}.notice.success{background:#e8f5ee;color:#155e3b}.notice.error{background:#fff0ee;color:#a12b21}.notice.info{background:#eaf3f7;color:#20556b}.notice a{font-weight:700}.empty-state{padding:35px;background:#fff;border:1px dashed #b9cbd1;border-radius:9px;color:var(--muted);text-align:center}.dashboard-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:25px 0 45px}.stat-card{background:#fff;border:1px solid var(--line);padding:20px;border-radius:8px}.stat-card strong{display:block;font:800 27px Manrope;color:var(--blue)}.stat-card span{font-size:12px;color:var(--muted)}.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:8px;margin:18px 0 40px}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);white-space:nowrap}th{background:#f0f5f6;color:#4f6571;font-size:10px;text-transform:uppercase;letter-spacing:.08em}tr:last-child td{border-bottom:0}.admin-grid{grid-template-columns:repeat(4,1fr)}.toolbar{display:flex;gap:9px;flex-wrap:wrap}.test-top{display:flex;justify-content:space-between;align-items:center;padding:35px 0 20px}.test-top h1{font-size:2.2rem}.timer-box{background:#173849;color:#fff;padding:13px 22px;border-radius:8px;text-align:center;min-width:125px}.timer-box span{display:block;font-size:9px;letter-spacing:.12em;color:#b9d0d8}.timer-box strong{font:800 25px Manrope}.test-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:20px}.exam-question{background:#fff;border:1px solid var(--line);border-radius:9px;padding:22px;margin-bottom:14px;scroll-margin-top:95px}.exam-options{display:grid;gap:8px}.exam-options label{display:flex;align-items:flex-start;gap:10px;padding:12px;border:1px solid var(--line);border-radius:6px;cursor:pointer;font-size:13px}.exam-options label:has(input:checked){border-color:var(--blue);background:#eef6f7}.exam-options input{margin:4px 0 0;accent-color:var(--blue)}.test-sidebar{background:#fff;border:1px solid var(--line);border-radius:9px;padding:18px;position:sticky;top:95px;height:max-content}.test-sidebar h3{margin-top:0}.question-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.question-palette a{border:1px solid var(--line);border-radius:5px;text-align:center;padding:7px 0;font-size:12px;color:var(--ink)}.question-palette a.answered{background:#dff1e8;border-color:#a6d4bc;color:#155e3b}.result-hero{text-align:center;background:#eaf2f3;border-radius:12px;padding:45px 20px;margin:35px 0}.result-hero h1{font-size:4rem;color:var(--blue);margin:8px}.result-hero p{color:var(--muted)}.result-stats{display:flex;justify-content:center;gap:55px;margin:25px}.result-stats strong,.result-stats span{display:block}.result-stats strong{font:800 22px Manrope}.result-stats span{font-size:11px;color:var(--muted)}.text-success{color:var(--green)}.text-danger{color:var(--red)}.site-footer{margin-top:70px;background:#132d3a;color:#c1d1d6;padding:25px 0;font-size:11px}.footer-inner{display:flex;justify-content:space-between;gap:15px}.install-body{display:grid;place-items:center;min-height:100vh;padding:20px}.install-card{width:min(480px,100%);background:#fff;padding:35px;border-radius:12px;border:1px solid var(--line)}.install-card label{display:block;margin:15px 0;font-size:12px;font-weight:700}.install-card input{display:block;width:100%;margin-top:7px}.upload-form{margin-top:25px}.upload-form input{display:block;width:100%;margin:10px 0}
@media(max-width:850px){.hero{grid-template-columns:1fr}.hero-copy{padding:42px 32px}.hero-panel{min-height:280px}.feature-grid{grid-template-columns:1fr 1fr}.admin-grid{grid-template-columns:1fr 1fr}.site-header nav{gap:13px}.test-layout{grid-template-columns:1fr}.test-sidebar{position:static;order:-1}.question-palette{grid-template-columns:repeat(10,1fr)}}
@media(max-width:620px){.container,.nav-wrap{width:calc(100% - 28px)}.nav-wrap{min-height:65px}.menu-toggle{display:block}.site-header nav{display:none;position:absolute;top:65px;left:0;right:0;background:#fff;padding:15px 22px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch}.nav-open .site-header nav{display:flex}.hero{margin-top:18px}.hero-copy{padding:32px 23px}.hero-panel{padding:30px 20px}.stats-row{padding:15px 5px;margin-bottom:45px}.stats-row strong{font-size:19px}.stats-row span{font-size:10px}.feature-grid,.category-grid,.admin-grid{grid-template-columns:1fr}.callout{padding:25px;align-items:flex-start;flex-direction:column}.page-intro{padding-top:34px}.page-intro h1{font-size:2.2rem}.filter-bar{flex-direction:column}.filter-bar select{min-width:0}.question-card{padding:18px}.form-grid{grid-template-columns:1fr;gap:0}.dashboard-stats{gap:7px}.stat-card{padding:13px}.stat-card strong{font-size:21px}.stat-card span{font-size:10px}.test-top{align-items:flex-start;gap:12px}.test-top h1{font-size:1.7rem}.timer-box{min-width:95px;padding:10px}.timer-box strong{font-size:21px}.question-palette{grid-template-columns:repeat(8,1fr)}.result-stats{gap:20px}.footer-inner{flex-direction:column}.auth-card{padding:25px}.hero-actions .btn{width:100%}}

.practice-choice{display:block;width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:6px;padding:12px 14px;margin:7px 0;font:inherit;font-size:13px;color:var(--ink);cursor:pointer}.practice-choice:hover:not(:disabled){border-color:var(--blue);background:#f3f8f9}.practice-choice:disabled{cursor:default;opacity:1}.practice-choice.choice-correct{border-color:#a6d4bc;background:#e8f5ee;color:#155e3b}.practice-choice.choice-wrong{border-color:#e7aaa5;background:#fff0ee;color:#a12b21}.practice-feedback{padding:13px 15px;margin:13px 0;border-radius:6px;font-size:13px}.practice-feedback p{margin:5px 0 0}.practice-feedback.is-correct{background:#e8f5ee;color:#155e3b}.practice-feedback.is-incorrect{background:#fff0ee;color:#a12b21}.practice-toolbar{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:10px 0}.practice-end{padding:25px 0 50px}.practice-choice-grid{margin-bottom:35px}

.nav-logout{display:inline-flex;margin:0}.nav-logout button{font:inherit;border:0;cursor:pointer;background:transparent;color:inherit;padding:inherit}


/* VU3DXR ASOC — editorial radio-field-manual visual system */
:root{
 --ink:#182b38;--muted:#657681;--blue:#173f55;--blue2:#0d3044;
 --pale:#edf1ed;--line:#d8ded9;--paper:#fffefa;--bg:#f4f3ed;
 --green:#176b4a;--red:#a8322a;--signal:#e36b36;--signal-soft:#fff0e7;
 --shadow:0 8px 24px rgba(24,43,56,.055);
}
html{scroll-padding-top:90px}
body{background:var(--bg);color:var(--ink);font-family:Arial,"Helvetica Neue",sans-serif;font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;font-weight:600;letter-spacing:-.025em;color:var(--ink)}
h1{line-height:1.08}
h2{font-size:clamp(1.55rem,3vw,2rem)}
h3{font-size:1.2rem;line-height:1.35}
.container{width:min(1160px,calc(100% - 48px))}
.site-header{background:rgba(255,254,250,.97);border-bottom:1px solid #cfd7d3;box-shadow:0 3px 14px rgba(24,43,56,.035);backdrop-filter:blur(12px)}
.nav-wrap{width:min(1200px,calc(100% - 48px));min-height:78px}
.brand{gap:13px;font-family:Arial,sans-serif;font-size:15px;letter-spacing:.055em}
.brand small{font:700 9px/1.5 Arial,sans-serif;letter-spacing:.19em;color:#74828a;margin-top:3px}
.brand-mark{width:43px;height:43px;display:grid;place-items:center;padding:0;border-radius:50%;background:var(--blue);border:3px solid #d7e0dc;outline:1px solid var(--blue);font:800 12px/1 Arial,sans-serif;letter-spacing:.04em}
.site-header nav{gap:clamp(13px,2vw,27px)}
.site-header nav a{font-size:13px;font-weight:700;color:#435865;white-space:nowrap}
.site-header nav a:not(.nav-cta):hover{color:var(--signal);text-decoration:none}
.site-header nav .nav-cta{background:var(--signal);border-radius:3px;padding:11px 17px;color:#fff}
.site-header nav .nav-cta:hover{background:#c95527;text-decoration:none}
.menu-toggle{color:var(--blue);font-size:26px;padding:8px}
.hero{margin:36px 0 28px;background:#e8ece6;border-radius:3px;grid-template-columns:1.12fr .88fr;min-height:420px;position:relative}
.hero:before{content:"VU3DXR  /  FIELD NOTES  /  ASOC";position:absolute;top:18px;left:28px;font:700 9px/1.2 monospace;letter-spacing:.17em;color:#687c82}
.hero-copy{padding:76px 54px 48px}
.eyebrow{font:700 10px/1.4 monospace;letter-spacing:.16em;color:var(--signal)}
.hero h1{font-size:clamp(2.55rem,5vw,4.35rem);max-width:650px;margin:18px 0}
.hero h1 em{color:var(--signal);font-style:normal}
.hero-copy>p{max-width:550px;color:#4f626c;font-size:17px;line-height:1.7}
.hero-actions{margin:30px 0 20px}
.hero-panel{background:#183b4d;padding:48px 36px;position:relative;overflow:hidden}
.hero-panel:before,.hero-panel:after{content:"";position:absolute;border:1px solid rgba(210,231,222,.16);border-radius:50%;width:330px;height:330px;left:50%;top:50%;transform:translate(-50%,-50%)}
.hero-panel:after{width:250px;height:250px}
.hero-panel>*{position:relative;z-index:1}
.hero-panel p{font:700 10px/1.5 monospace;letter-spacing:.15em;color:#b9d0d2;text-transform:uppercase}
.radio-art{width:min(320px,100%);height:220px;border:1px solid #78909a;border-radius:5px;background:#172a32;padding:22px;box-shadow:12px 14px 0 rgba(3,20,29,.2)}
.radio-label{font:700 10px monospace;letter-spacing:.2em;color:#a9c0c4}
.radio-screen{background:#0b1d1e;border:1px solid #54736c;border-radius:2px;color:#a9e5b9;font:700 32px/1.2 monospace}
.radio-screen small{font:10px monospace}
.radio-dial{border:4px solid #82979a;background:#203944}
.radio-bars i{background:#e5a15f}
.stats-row{border-radius:3px;box-shadow:var(--shadow);padding:22px 15px;margin-bottom:68px}
.stats-row strong{font:700 26px/1.2 Georgia,serif;color:var(--blue)}
.stats-row span{font:700 10px/1.4 monospace;letter-spacing:.08em;text-transform:uppercase}
.section{margin:62px 0}
.section-heading{border-bottom:1px solid #cbd4d0;padding-bottom:15px;margin-bottom:24px}
.section-heading h2{font-size:clamp(1.6rem,3vw,2.1rem)}
.section-heading>a{font:700 11px monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--signal)}
.feature-grid,.category-grid{gap:1px;background:#d4dcd7;border:1px solid #d4dcd7}
.feature-card{border:0;border-radius:0;padding:26px;background:var(--paper);transition:background .18s}
.feature-card:hover{background:#f9eee6;border:0;transform:none}
.feature-icon{width:36px;height:36px;border-radius:50%;background:#e8eee9;color:var(--blue);font:700 11px monospace}
.feature-card h3{margin:17px 0 8px}
.feature-card p{font-size:14px;line-height:1.65}
.category-grid a{border:0;border-radius:0;background:var(--paper);padding:17px 19px;font-size:14px}
.category-grid a:hover{background:#f9eee6;text-decoration:none}
.category-grid b{font:700 12px monospace;color:var(--signal)}
.callout{margin:65px 0;background:var(--blue);border-radius:3px;padding:36px 42px;border-left:5px solid var(--signal)}
.callout h2{color:#fff}
.callout p{color:#d0dcde}
.btn{background:var(--signal);border:1px solid var(--signal);border-radius:3px;padding:12px 20px;font:700 12px/1.2 Arial,sans-serif;letter-spacing:.035em;min-height:46px}
.btn:hover{background:#c95527;border-color:#c95527}
.btn-outline{background:transparent;color:var(--blue);border-color:#87999c}
.btn-outline:hover{background:#dce5df;color:var(--blue2)}
.page-intro{padding:52px 0 28px;border-bottom:1px solid #d2d9d4;margin-bottom:24px}
.page-intro h1{font-size:clamp(2.1rem,4vw,3.15rem);margin:8px 0 12px}
.page-intro p{font-size:16px;line-height:1.7}
.filter-bar{background:var(--paper);border:1px solid #cbd5d1;border-radius:3px;padding:13px;box-shadow:var(--shadow)}
input,select,textarea,.filter-bar input,.filter-bar select{border:1px solid #bdcbc7;border-radius:3px;background:#fffefa;padding:12px 13px;font-size:16px}
input:focus,select:focus,textarea:focus{outline:3px solid rgba(227,107,54,.17);border-color:var(--signal)}
.question-card{background:var(--paper);border:1px solid #d5ddd8;border-left:3px solid #b7c5bf;border-radius:2px;padding:23px 25px;margin:13px 0;box-shadow:0 2px 9px rgba(24,43,56,.025)}
.question-meta{font:700 10px/1.4 monospace;letter-spacing:.1em;color:#657780}
.question-meta span:last-child{color:var(--signal)}
.question-card h3,.exam-question h3{font:600 18px/1.55 Arial,sans-serif;letter-spacing:0;margin:16px 0}
.options{padding-left:29px}
.options li{padding:9px 12px;margin:5px 0;border-radius:2px;font-size:15px;line-height:1.55}
.options li.correct{background:#eaf3ed;color:#155e3b}
.explanation{font-size:14px;line-height:1.65}
.pagination a{border-radius:2px}
.pagination a.current{background:var(--blue)}
.panel,.auth-card,.install-card{background:var(--paper);border:1px solid #d3dcd7;border-radius:3px;box-shadow:var(--shadow)}
.panel{padding:30px}
.form-panel h2{font-size:1.55rem}
.form-panel label,.auth-card label,.install-card label{font-size:12px;letter-spacing:.025em}
.auth-card{padding:38px}
.auth-card h1{font-size:2.3rem}
.notice{border-radius:2px;padding:14px 17px}
.empty-state{border-radius:2px;background:var(--paper)}
.dashboard-stats{gap:1px;background:#d4dcd7;border:1px solid #d4dcd7}
.stat-card{border:0;border-radius:0;background:var(--paper)}
.stat-card strong{font:700 28px Georgia,serif;color:var(--blue)}
.table-wrap{border-radius:2px}
th{background:#e9eee9;color:#425864}
th,td{padding:13px 15px}
.test-top{padding:34px 0 20px}
.test-top h1{font-size:clamp(1.8rem,4vw,2.6rem)}
.timer-box{background:var(--blue);border-radius:3px;border-bottom:3px solid var(--signal)}
.exam-question{background:var(--paper);border:1px solid #d5ddd8;border-radius:2px;padding:24px}
.exam-options label{border:1px solid #d5ddd8;border-radius:2px;padding:14px;font-size:15px;line-height:1.5}
.exam-options label:has(input:checked){border-color:var(--signal);background:#fff5ef}
.exam-options input{accent-color:var(--signal)}
.test-sidebar{border-radius:2px;box-shadow:var(--shadow)}
.question-palette a{border-radius:2px;padding:8px 0}
.result-hero{background:#e8ece6;border-radius:3px;border-top:4px solid var(--signal)}
.result-hero h1{font:700 clamp(3rem,8vw,5rem) Georgia,serif;color:var(--blue)}
.site-footer{background:#122d3b;border-top:4px solid var(--signal);padding:30px 0;font-size:12px;line-height:1.6}
.practice-choice{border:1px solid #d2dcd7;border-radius:2px;padding:14px 15px;font-size:15px;line-height:1.5}
.practice-choice:hover:not(:disabled){border-color:var(--signal);background:#fff5ef}
.practice-choice.choice-correct{border-color:#a6cbb5;background:#edf5ef}
.practice-choice.choice-wrong{border-color:#dfaaa3;background:#fff1ed}
.practice-feedback{border-radius:2px;padding:15px;font-size:14px;line-height:1.6}
.practice-toolbar{font:700 11px monospace;letter-spacing:.04em}
.nav-logout button{border-radius:3px}

/* Tablet and phone layouts */
@media(max-width:900px){
 .container{width:min(100% - 36px,760px)}
 .nav-wrap{width:calc(100% - 36px)}
 .site-header nav{gap:12px}
 .site-header nav a{font-size:12px}
 .hero{grid-template-columns:1fr .8fr}
 .hero-copy{padding:70px 32px 38px}
 .hero-panel{padding:35px 20px}
 .test-layout{grid-template-columns:minmax(0,1fr) 210px}
}
@media(max-width:680px){
 body{font-size:16px;line-height:1.6}
 .container,.nav-wrap{width:calc(100% - 32px)}
 .nav-wrap{min-height:66px}
 .brand{font-size:14px}
 .brand-mark{width:39px;height:39px}
 .menu-toggle{display:block}
 .site-header nav{display:none;position:absolute;top:66px;left:0;right:0;background:var(--paper);padding:12px 18px 18px;border-bottom:1px solid var(--line);box-shadow:0 10px 18px rgba(24,43,56,.1);gap:0}
 .nav-open .site-header nav{display:flex}
 .site-header nav a,.site-header nav .nav-logout{display:block;padding:12px 8px;border-bottom:1px solid #e5e9e5;font-size:14px}
 .site-header nav .nav-cta{display:inline-flex;margin-top:5px}
 .nav-logout button{padding:10px 14px}
 .hero{margin:18px 0 22px;grid-template-columns:1fr;min-height:0}
 .hero:before{top:15px;left:21px;font-size:8px}
 .hero-copy{padding:58px 23px 28px}
 .hero h1{font-size:clamp(2.25rem,10vw,3.15rem);line-height:1.05;margin:14px 0}
 .hero-copy>p{font-size:15px;line-height:1.65}
 .hero-actions{display:grid;grid-template-columns:1fr;gap:9px;margin:22px 0 15px}
 .hero-actions .btn{width:100%;min-height:48px}
 .hero-panel{min-height:250px;padding:27px 20px}
 .radio-art{height:190px;width:min(300px,100%)}
 .radio-screen{font-size:27px}
 .stats-row{grid-template-columns:repeat(3,minmax(0,1fr));padding:15px 4px;margin-bottom:45px}
 .stats-row div{padding:0 5px}
 .stats-row strong{font-size:21px}
 .stats-row span{font-size:9px;letter-spacing:.03em}
 .section{margin:44px 0}
 .section-heading{align-items:flex-start;flex-direction:column;gap:8px}
 .feature-grid,.category-grid,.admin-grid{grid-template-columns:1fr}
 .feature-card{padding:21px}
 .category-grid{gap:1px}
 .category-grid a{padding:15px}
 .callout{margin:44px 0;padding:25px 22px;flex-direction:column;align-items:flex-start}
 .page-intro{padding:34px 0 20px}
 .page-intro h1{font-size:2.25rem}
 .page-intro p{font-size:15px}
 .filter-bar{flex-direction:column;padding:10px}
 .filter-bar select{min-width:0;width:100%}
 .filter-bar input,.filter-bar select{min-height:46px}
 .question-card{padding:17px 16px;margin:11px 0}
 .question-card h3,.exam-question h3{font-size:16px;line-height:1.55}
 .options{padding-left:25px}
 .options li{font-size:14px;padding:9px 8px}
 .form-panel{margin:15px 0 45px}
 .panel{padding:19px 16px}
 .form-grid{grid-template-columns:1fr;gap:0}
 .form-panel input,.form-panel select,.form-panel textarea,.auth-card input{min-height:46px}
 .auth-wrap{padding:28px 0}
 .auth-card{padding:25px 20px;width:100%}
 .auth-card h1{font-size:2rem}
 .dashboard-stats{grid-template-columns:1fr 1fr;gap:1px}
 .stat-card{padding:15px 12px}
 .stat-card strong{font-size:23px}
 .stat-card span{font-size:11px}
 .table-wrap{margin:14px 0 28px}
 table{font-size:12px}
 th,td{padding:10px 11px}
 .test-top{padding:24px 0 15px;align-items:center}
 .test-top h1{font-size:1.65rem;margin:0}
 .timer-box{min-width:92px;padding:9px 10px}
 .timer-box strong{font-size:21px}
 .test-layout{grid-template-columns:1fr;gap:12px}
 .test-sidebar{position:static;order:-1;padding:13px}
 .test-sidebar h3{font-size:16px;margin-bottom:10px}
 .question-palette{grid-template-columns:repeat(8,minmax(0,1fr));gap:5px}
 .question-palette a{padding:8px 0;font-size:12px}
 .exam-question{padding:18px 15px;margin-bottom:11px}
 .exam-options label{padding:13px 11px;font-size:14px}
 .result-hero{padding:30px 15px;margin:22px 0}
 .result-stats{gap:18px;flex-wrap:wrap;margin:20px 0}
 .result-stats strong{font-size:20px}
 .footer-inner{flex-direction:column;gap:8px}
 .site-footer{margin-top:48px;padding:25px 0}
 .practice-choice{padding:14px 12px;font-size:14px}
 .toolbar{gap:7px}
 .toolbar .btn{flex:1 1 auto}
}
@media(max-width:380px){
 .container,.nav-wrap{width:calc(100% - 24px)}
 .brand small{font-size:8px}
 .hero-copy{padding-left:18px;padding-right:18px}
 .stats-row strong{font-size:18px}
 .stats-row span{font-size:8px}
 .question-palette{grid-template-columns:repeat(6,minmax(0,1fr))}
}