/* ============================================================
   TEMA 14 · CONTROL Y CIERRE DEL PROYECTO — USIL
   Dashboard educativo interactivo de repaso
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --navy:#00205d;
  --navy-deep:#001440;
  --navy-light:#0d3591;
  --blue-accent:#3a6df0;
  --ice:#cfe0ff;
  --gold:#e6a817;
  --green:#1c8a5b;
  --red:#c0392b;

  --bg:#f8fafc;
  --surface:#ffffff;
  --surface-2:#eff1f9;
  --border:#e3e7f0;
  --text:#1a2138;
  --text-dim:#5b6478;
  --text-mute:#8891a4;

  --s-sm:0 1px 3px rgba(0,0,0,.05);
  --s-md:0 6px 16px rgba(0,0,0,.07);
  --s-lg:0 16px 40px rgba(0,0,0,.09);

  --r-card:14px;
  --r-sm:8px;
  --r-hero:20px;

  --f-head:'Syne',sans-serif;
  --f-body:'DM Sans',sans-serif;
  --f-mono:'JetBrains Mono',monospace;

  --sidebar-w:268px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--f-body);
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--f-head);margin:0;}
p{margin:0 0 12px;line-height:1.65;color:var(--text-dim);}
ul{margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;}
a{color:inherit;text-decoration:none;}

/* ============ GLOBAL PROGRESS BAR ============ */
.global-progress{
  position:fixed;top:0;left:var(--sidebar-w);right:0;height:3px;
  background:var(--surface-2);z-index:60;
}
.global-progress-fill{
  height:100%;width:0%;
  background:linear-gradient(90deg,var(--navy),var(--blue-accent));
  transition:width .4s ease;
}

/* ============ SIDEBAR ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--navy-deep);color:#fff;
  display:flex;flex-direction:column;
  z-index:80;
}
.sb-brand{
  display:flex;align-items:center;gap:12px;
  padding:22px 20px 18px;border-bottom:1px solid rgba(255,255,255,.08);
}
.sb-logo{
  width:42px;height:42px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,var(--blue-accent),var(--navy-light));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--f-head);font-weight:800;font-size:16px;color:#fff;
  box-shadow:var(--s-md);
}
.sb-brand-text .sb-course{font-family:var(--f-head);font-weight:700;font-size:14.5px;line-height:1.25;color:#fff;}
.sb-brand-text .sb-inst{font-size:11px;color:rgba(255,255,255,.55);margin-top:2px;letter-spacing:.03em;}

.sb-nav{flex:1;overflow-y:auto;padding:14px 10px 10px;}
.sb-nav::-webkit-scrollbar{width:5px;}
.sb-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:4px;}

.sb-section-label{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;
  color:rgba(255,255,255,.35);padding:14px 12px 6px;
}
.sb-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:10px;margin:2px 0;
  color:rgba(255,255,255,.72);font-size:13.5px;font-weight:500;
  transition:background .15s,color .15s;position:relative;
}
.sb-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.sb-item.active{background:rgba(255,255,255,.14);color:#fff;}
.sb-item.active::before{
  content:'';position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;
  background:var(--blue-accent);
}
.sb-item .sb-code{
  font-family:var(--f-mono);font-size:10px;color:rgba(255,255,255,.4);
  width:20px;flex:none;
}
.sb-item.active .sb-code{color:var(--ice);}
.sb-item .sb-ico{width:18px;flex:none;text-align:center;font-size:14px;}
.sb-item .sb-check{margin-left:auto;font-size:11px;color:var(--green);opacity:0;}
.sb-item.done .sb-check{opacity:1;}

.sb-progress-wrap{padding:16px 20px 20px;border-top:1px solid rgba(255,255,255,.08);}
.sb-progress-label{
  display:flex;justify-content:space-between;font-family:var(--f-mono);
  font-size:10.5px;color:rgba(255,255,255,.5);margin-bottom:8px;
}
.sb-progress-track{height:6px;border-radius:4px;background:rgba(255,255,255,.1);overflow:hidden;}
.sb-progress-fill{height:100%;background:linear-gradient(90deg,var(--blue-accent),var(--ice));border-radius:4px;transition:width .4s ease;}

/* Hamburger / mobile */
.hamburger{
  display:none;position:fixed;top:14px;left:14px;z-index:90;
  width:42px;height:42px;border-radius:10px;background:var(--navy);color:#fff;
  border:none;align-items:center;justify-content:center;box-shadow:var(--s-md);
}
.sb-overlay{display:none;position:fixed;inset:0;background:rgba(0,10,30,.5);z-index:70;}

/* ============ MAIN CONTENT ============ */
.main{margin-left:var(--sidebar-w);min-height:100vh;position:relative;}
.page{display:none;flex-direction:column;min-height:100vh;}
.page.active{display:flex;animation:pageIn .45s ease;}
@keyframes pageIn{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:translateY(0);}
}

/* ============ HERO BAND ============ */
.hero{
  background:linear-gradient(135deg,var(--navy-deep) 0%,var(--navy) 55%,var(--navy-light) 100%);
  color:#fff;padding:40px 48px 34px;position:relative;overflow:hidden;
}
.hero::after{
  content:'';position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.08),transparent 70%);
}
.hero-breadcrumb{
  font-family:var(--f-mono);font-size:11.5px;color:rgba(255,255,255,.55);
  letter-spacing:.04em;margin-bottom:14px;
}
.hero-top{display:flex;align-items:center;gap:14px;margin-bottom:10px;}
.hero-badge{
  width:44px;height:44px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,var(--blue-accent),var(--ice));
  color:var(--navy-deep);font-family:var(--f-mono);font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.hero h1{
  font-size:32px;font-weight:800;line-height:1.15;
  background:linear-gradient(90deg,#ffffff,var(--ice));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:14.5px;color:rgba(255,255,255,.62);max-width:640px;margin-top:8px;}
.hero-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;}
.hchip{
  font-family:var(--f-mono);font-size:11px;padding:5px 12px;border-radius:20px;
  background:rgba(255,255,255,.1);color:rgba(255,255,255,.85);border:1px solid rgba(255,255,255,.15);
}

/* ============ PAGE BODY ============ */
.pbody{padding:44px 48px;max-width:960px;width:100%;flex:1;}
.sec-title{
  display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;margin:30px 0 16px;
}
.sec-title::before{content:'';width:4px;height:20px;border-radius:3px;background:var(--blue-accent);}
.sec-title:first-child{margin-top:0;}
.divider{height:1px;background:var(--border);margin:32px 0;}

/* ============ TABS ============ */
.tab-bar{
  display:flex;gap:6px;background:var(--surface-2);border-radius:12px;padding:5px;margin-bottom:26px;
  flex-wrap:wrap;
}
.tab-btn{
  border:none;background:transparent;padding:9px 16px;border-radius:9px;
  font-size:13.5px;font-weight:600;color:var(--text-dim);transition:all .15s;
}
.tab-btn.active{background:var(--navy);color:#fff;box-shadow:var(--s-sm);}
.tab-panel{display:none;}
.tab-panel.active{display:block;animation:fadeQuick .3s ease;}
@keyframes fadeQuick{from{opacity:0;}to{opacity:1;}}

/* ============ TECHNIQUE BLOCKS ============ */
.technique-block{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:22px 24px;margin-bottom:20px;box-shadow:var(--s-sm);
}
.tb-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:12px;}
.tb-icon{
  width:48px;height:48px;border-radius:12px;flex:none;font-size:22px;
  display:flex;align-items:center;justify-content:center;color:#fff;
  background:linear-gradient(135deg,var(--navy),var(--blue-accent));
}
.tb-title{font-family:var(--f-head);font-size:16.5px;font-weight:700;}
.tb-sub{font-family:var(--f-mono);font-size:11px;color:var(--text-mute);margin-top:2px;}

/* ============ EXPANDABLE EXERCISES ============ */
.exercise{
  border:1px solid var(--border);border-radius:var(--r-card);margin-bottom:16px;overflow:hidden;background:var(--surface);
}
.ex-header{
  display:flex;justify-content:space-between;align-items:center;padding:16px 20px;cursor:pointer;
}
.ex-header-l{display:flex;align-items:center;gap:10px;}
.ex-title{font-weight:700;font-size:14.5px;}
.ex-badge{
  font-family:var(--f-mono);font-size:10.5px;padding:3px 9px;border-radius:20px;
  background:var(--surface-2);color:var(--text-dim);
}
.ex-chevron{transition:transform .3s;color:var(--text-mute);}
.exercise.open .ex-chevron{transform:rotate(180deg);}
.ex-body{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px;}
.exercise.open .ex-body{padding-bottom:20px;}
.ex-context{
  border-left:3px solid var(--blue-accent);background:var(--surface-2);
  padding:12px 16px;border-radius:0 8px 8px 0;font-size:13.5px;margin-bottom:14px;
}
.ex-q{font-size:13.5px;font-weight:600;margin-bottom:8px;}
.btn-sol{
  background:var(--navy);color:#fff;border:none;border-radius:8px;padding:9px 16px;
  font-size:12.5px;font-weight:600;margin-top:6px;
}
.sol-body{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.sol-body.open{margin-top:12px;}
.sol-inner{
  background:#f0fbf5;border:1px solid #d3ecdf;border-radius:10px;padding:14px 16px;font-size:13.5px;
}

/* ============ ACCORDION ============ */
.acc{border:1px solid var(--border);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;}
.acc-header{
  display:flex;justify-content:space-between;align-items:center;padding:15px 18px;cursor:pointer;
  background:var(--surface);font-weight:600;font-size:13.5px;
}
.acc.open .acc-header{background:var(--surface-2);}
.acc-chevron{transition:transform .3s;color:var(--text-mute);}
.acc.open .acc-chevron{transform:rotate(180deg);}
.acc-body{max-height:0;overflow:hidden;transition:max-height .35s ease;background:var(--surface-2);}
.acc-body-inner{padding:4px 18px 16px;font-size:13.5px;color:var(--text-dim);}

/* ============ FAQ ============ */
.faq-item{border-bottom:1px solid var(--border);padding:14px 0;}
.faq-item:last-child{border-bottom:none;}
.faq-q{display:flex;justify-content:space-between;gap:10px;align-items:center;cursor:pointer;font-weight:700;font-size:14px;}
.faq-q-l{display:flex;align-items:center;gap:10px;}
.faq-ico{color:var(--blue-accent);}
.faq-chevron{transition:transform .3s;color:var(--text-mute);flex:none;}
.faq-item.open .faq-chevron{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a-inner{padding:10px 0 2px 28px;font-size:13.5px;color:var(--text-dim);}

/* ============ CARDS GRID ============ */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-bottom:10px;}
.card{
  position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px;overflow:hidden;transition:transform .2s,box-shadow .2s;box-shadow:var(--s-sm);
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--navy),var(--blue-accent));
}
.card:hover{transform:translateY(-3px);box-shadow:var(--s-lg);}
.card-ico{font-size:24px;margin-bottom:10px;display:block;}
.card h4{font-size:14.5px;margin-bottom:6px;}
.card p{font-size:13px;margin-bottom:8px;}
.card-tag{
  font-family:var(--f-mono);font-size:10px;color:var(--blue-accent);background:#eaf0ff;
  padding:3px 9px;border-radius:20px;display:inline-block;
}
.card.clickable{cursor:pointer;}

/* ============ TABLE ============ */
.tbl-wrap{overflow-x:auto;margin-bottom:20px;border-radius:var(--r-card);border:1px solid var(--border);}
table.styled{width:100%;border-collapse:collapse;font-size:13px;}
table.styled thead th{
  background:var(--navy);color:#fff;padding:12px 14px;text-align:left;font-weight:600;
  font-family:var(--f-mono);font-size:11.5px;letter-spacing:.02em;white-space:nowrap;
}
table.styled tbody td{padding:11px 14px;border-bottom:1px solid var(--border);}
table.styled tbody tr:nth-child(even){background:var(--surface-2);}
table.styled tbody tr:hover{background:#eaf0ff;}
table.styled tbody td:first-child{font-weight:700;color:var(--navy);}

/* ============ FLOW ============ */
.flow-wrap{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:20px 0;}
.flow-step{
  display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;width:130px;
}
.flow-circle{
  width:44px;height:44px;border-radius:50%;color:#fff;font-family:var(--f-mono);font-weight:700;
  display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--navy),var(--blue-accent));
  box-shadow:var(--s-sm);
}
.flow-step span.flabel{font-size:11.5px;font-weight:600;color:var(--text);}
.flow-arrow{color:var(--text-mute);font-size:18px;flex:none;}

/* ============ CALLOUTS ============ */
.box{border-left:3.5px solid;border-radius:0 10px 10px 0;padding:13px 16px;margin:14px 0;font-size:13.5px;display:flex;gap:10px;}
.box-icon{flex:none;font-size:16px;line-height:1.4;}
.box p{margin:0;color:var(--text);}
.info-box{border-color:var(--blue-accent);background:#eef3ff;}
.warn-box{border-color:var(--gold);background:#fdf6e6;}
.success-box{border-color:var(--green);background:#eaf8f0;}
.danger-box{border-color:var(--red);background:#fdeceb;}
.navy-box{border-color:var(--navy);background:#eaeef7;}

/* ============ SIMULATOR SHELL ============ */
.simulator{border:1px solid var(--border);border-radius:16px;margin:24px 0;overflow:hidden;box-shadow:var(--s-md);}
.sim-header{
  background:linear-gradient(120deg,var(--navy-deep),var(--navy));color:#fff;
  padding:18px 22px;display:flex;align-items:center;gap:14px;
}
.sim-header .sim-ico{font-size:24px;}
.sim-header h4{font-size:15.5px;}
.sim-header .sim-sub{font-size:12px;color:rgba(255,255,255,.6);margin-top:2px;}
.sim-body{padding:24px;background:var(--surface);}
.btn-reset{
  margin-left:auto;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  color:#fff;padding:7px 14px;border-radius:8px;font-size:12px;font-weight:600;flex:none;
}
.btn-primary{
  background:var(--navy);color:#fff;border:none;border-radius:9px;padding:10px 20px;font-size:13px;font-weight:700;
}
.btn-outline{
  background:transparent;color:var(--navy);border:1.5px solid var(--navy);border-radius:9px;padding:10px 20px;font-size:13px;font-weight:700;
}

/* --- Calculadora --- */
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px;}
.calc-field label{display:block;font-size:12px;font-weight:600;color:var(--text-dim);margin-bottom:6px;}
.calc-field input{
  width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:9px;font-family:var(--f-mono);font-size:14px;
}
.calc-field input:focus{outline:none;border-color:var(--blue-accent);}
.calc-result{
  background:var(--navy-deep);color:#fff;border-radius:14px;padding:20px;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:16px;
}
.calc-metric{text-align:center;}
.calc-metric .cm-val{font-family:var(--f-mono);font-size:22px;font-weight:700;}
.calc-metric .cm-label{font-size:10.5px;color:rgba(255,255,255,.55);margin-top:4px;text-transform:uppercase;letter-spacing:.04em;}
.calc-verdict{margin-top:16px;padding:12px 16px;border-radius:10px;font-size:13.5px;font-weight:600;}
.verdict-success{background:#eaf8f0;color:var(--green);}
.verdict-warn{background:#fdf6e6;color:#95720c;}
.verdict-danger{background:#fdeceb;color:var(--red);}

/* --- Matriz clic --- */
.mode-btns{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.mode-btn{
  border:1.5px solid var(--border);background:var(--surface);padding:8px 14px;border-radius:8px;font-size:12.5px;font-weight:600;
}
.mode-btn.active{background:var(--navy);color:#fff;border-color:var(--navy);}
.matrix-tbl{width:100%;border-collapse:collapse;}
.matrix-tbl td, .matrix-tbl th{border:1px solid var(--border);padding:10px;text-align:center;font-size:12.5px;}
.matrix-tbl th{background:var(--surface-2);font-family:var(--f-mono);font-size:11px;}
.mcell{cursor:pointer;transition:background .15s;font-weight:700;}
.mcell.sel-a{background:#eaf0ff;color:var(--navy);}
.mcell.sel-b{background:#fdf6e6;color:#95720c;}
.mcell.sel-c{background:#fdeceb;color:var(--red);}
.mcell.correct{outline:2.5px solid var(--green);}
.mcell.incorrect{outline:2.5px solid var(--red);}
.matrix-feedback{margin-top:14px;font-size:13px;}
.row-ok{color:var(--green);font-weight:600;}
.row-bad{color:var(--red);font-weight:600;}

/* --- SVG chart --- */
.svg-wrap{background:var(--surface-2);border-radius:12px;padding:16px;overflow-x:auto;}
.svg-wrap svg{width:100%;min-width:560px;height:auto;}
.chart-controls{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;}
.chart-note{
  margin-top:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:10px;font-size:13px;
}

/* --- Decision flow --- */
.cf-steps{display:flex;gap:6px;margin-bottom:20px;}
.cf-step-dot{flex:1;height:5px;border-radius:4px;background:var(--surface-2);}
.cf-step-dot.done{background:var(--green);}
.cf-step-dot.active{background:var(--blue-accent);}
.cf-scenario{
  background:var(--surface-2);border-radius:12px;padding:16px 18px;margin-bottom:16px;font-size:13.5px;
}
.cf-options{display:grid;gap:10px;}
.cf-opt{
  text-align:left;border:1.5px solid var(--border);background:var(--surface);border-radius:10px;
  padding:12px 15px;font-size:13.5px;font-weight:500;transition:all .15s;
}
.cf-opt:hover{border-color:var(--blue-accent);}
.cf-opt.ok{background:#eaf8f0;border-color:var(--green);}
.cf-opt.err{background:#fdeceb;border-color:var(--red);}
.cf-feedback{margin-top:12px;font-size:13px;padding:10px 14px;border-radius:8px;display:none;}
.cf-feedback.show{display:block;}
.cf-score{
  font-family:var(--f-mono);font-weight:700;color:var(--navy);position:absolute;top:18px;right:22px;font-size:13px;
}
.cf-result{text-align:center;padding:20px 0;}
.cf-result .cf-big{font-family:var(--f-head);font-size:38px;font-weight:800;color:var(--navy);}

/* ============ QUIZ ============ */
.quiz-shell{max-width:700px;}
.quiz-progress-track{height:6px;border-radius:4px;background:var(--surface-2);overflow:hidden;margin-bottom:10px;}
.quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--navy),var(--blue-accent));border-radius:4px;transition:width .3s;}
.quiz-count{font-family:var(--f-mono);font-size:12px;color:var(--text-mute);margin-bottom:20px;}
.quiz-q{font-family:var(--f-head);font-size:18px;font-weight:700;margin-bottom:20px;line-height:1.4;}
.quiz-opts{display:grid;gap:10px;}
.quiz-opt{
  text-align:left;border:1.5px solid var(--border);background:var(--surface);border-radius:12px;
  padding:14px 18px;font-size:14px;font-weight:500;transition:all .15s;
}
.quiz-opt:hover:not(:disabled){border-color:var(--blue-accent);background:#eef3ff;}
.quiz-opt.correct{background:#eaf8f0;border-color:var(--green);color:var(--green);font-weight:700;}
.quiz-opt.incorrect{background:#fdeceb;border-color:var(--red);color:var(--red);font-weight:700;}
.quiz-opt:disabled{cursor:default;}
.quiz-feedback{
  margin-top:18px;padding:14px 18px;border-radius:10px;font-size:13.5px;display:none;line-height:1.6;
}
.quiz-feedback.show{display:block;}
.quiz-feedback.fb-correct{background:#eaf8f0;color:#1c8a5b;}
.quiz-feedback.fb-incorrect{background:#fdeceb;color:#a13328;}
.quiz-next{margin-top:18px;display:none;}
.quiz-next.show{display:inline-block;}
.quiz-result{text-align:center;padding:30px 0;}
.quiz-result .qr-score{font-family:var(--f-head);font-size:52px;font-weight:800;color:var(--navy);}
.quiz-result .qr-msg{font-size:15px;margin:14px 0 22px;color:var(--text-dim);}
.qr-bar-track{height:12px;border-radius:6px;background:var(--surface-2);overflow:hidden;max-width:400px;margin:0 auto 22px;}
.qr-bar-fill{height:100%;border-radius:6px;transition:width .6s ease;}

/* ============ STATS / INICIO ============ */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin:26px 0 36px;}
.stat-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px;text-align:center;box-shadow:var(--s-sm);
}
.stat-num{font-family:var(--f-head);font-size:30px;font-weight:800;color:var(--navy);}
.stat-label{font-size:12px;color:var(--text-dim);margin-top:4px;}
.topic-map{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-bottom:20px;}
.topic-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:18px;
  cursor:pointer;transition:all .2s;box-shadow:var(--s-sm);
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--s-lg);border-color:var(--blue-accent);}
.topic-card .tc-num{font-family:var(--f-mono);font-size:11px;color:var(--blue-accent);font-weight:700;}
.topic-card h4{font-size:14.5px;margin:8px 0 4px;}
.topic-card p{font-size:12.5px;margin:0;}
.hero-cta{
  margin-top:22px;background:#fff;color:var(--navy-deep);border:none;padding:13px 26px;border-radius:11px;
  font-weight:700;font-size:14px;box-shadow:var(--s-md);
}

/* ============ FOOTER NAV ============ */
.pfooter{
  margin-top:auto;border-top:1px solid var(--border);padding:20px 48px;
  display:flex;justify-content:space-between;align-items:center;background:var(--surface);
}
.pf-btn{
  padding:11px 20px;border-radius:10px;font-size:13.5px;font-weight:700;border:1.5px solid var(--navy);
}
.pf-prev{background:transparent;color:var(--navy);}
.pf-next{background:var(--navy);color:#fff;}
.pf-mid{font-family:var(--f-mono);font-size:12px;color:var(--text-mute);}
.pf-btn:disabled{opacity:.35;cursor:default;}

/* ============ RESPONSIVE ============ */
@media (max-width:1024px){
  .hamburger{display:flex;}
  .sidebar{transform:translateX(-100%);transition:transform .3s ease;}
  .sidebar.open{transform:translateX(0);}
  .sb-overlay.show{display:block;}
  .main{margin-left:0;}
  .global-progress{left:0;}
  .cards-grid, .topic-map{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));}
  .calc-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .hero{padding:70px 22px 26px;}
  .hero h1{font-size:24px;}
  .pbody{padding:26px 20px;}
  .quiz-q{font-size:16px;}
  .pfooter{padding:16px 20px;flex-wrap:wrap;gap:10px;}
  .tbl-wrap{font-size:12px;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .sim-header{padding:14px 16px;flex-wrap:wrap;}
  .btn-reset{margin-left:0;}
}