:root{--ink:#19354b;--navy:#0f263d;--teal:#147f87;--aqua:#46c7be;--pale:#eaf8f7;--line:#d9e6ed;--muted:#5f7486;--white:#fff;--surface:#f6f9fb;--shadow:0 8px 26px rgba(12,37,58,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--white);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);line-height:1.65}a{color:#06707d}a:hover{text-decoration-thickness:2px}button,textarea{font:inherit}button{cursor:pointer}.container{width:min(1140px,calc(100% - 44px));margin:auto}.skip{position:absolute;top:-120px;left:1rem;background:#fff;padding:1rem;z-index:50}.skip:focus{top:12px}.site-head{background:#fff;border-bottom:1px solid var(--line)}.navline{display:flex;justify-content:space-between;gap:16px;align-items:center;min-height:82px}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--navy);font-size:.99rem;font-weight:900;letter-spacing:.07em}.brand small{display:block;font-weight:600;font-size:.65rem;letter-spacing:.11em;color:var(--muted)}.brandmark{width:44px;height:44px;background:var(--navy);color:var(--aqua);border-radius:12px;display:grid;place-items:center}.nav-return{font-size:.86rem;font-weight:700;text-decoration:none}.hero{background:radial-gradient(ellipse at 93% 10%,#166771 0,transparent 40%),linear-gradient(120deg,#0d263e 10%,#153954 90%);color:white;padding:46px 0 62px}.breadcrumbs{font-size:.81rem;color:#b2d1d8;margin-bottom:34px}.breadcrumbs a{color:#c6e9e5;text-decoration:none}.eyebrow,.kicker{font-size:.75rem;letter-spacing:.16em;font-weight:850;color:#54d8cc}.hero h1{font-size:clamp(2.1rem,5vw,3.65rem);max-width:850px;line-height:1.13;letter-spacing:-.045em;margin:13px 0 22px}.hero h1 span{color:#7bebdc}.lede{max-width:790px;color:#e3f0f4;font-size:1.15rem}.facts{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0}.facts span{border:1px solid #5a8592;padding:6px 12px;border-radius:999px;font-size:.81rem;background:#ffffff10}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}.btn{border:1px solid transparent;border-radius:10px;text-decoration:none;font-size:.9rem;font-weight:750;padding:12px 18px;display:inline-flex;align-items:center;justify-content:center;line-height:1.35}.btn.primary{background:#1b9a9c;color:white}.btn.primary:hover{background:#177b7e}.btn.secondary{background:#eaf8f7;color:#074c57;border-color:#b9dedf}.btn.subtle{background:#fff;border-color:#cad9e3;color:#284d62}.layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;padding:50px 0}.sidebar{position:sticky;align-self:start;top:20px;border:1px solid var(--line);border-radius:15px;padding:22px 19px;background:var(--surface)}.sidebar h2{font-size:.93rem;margin:0 0 16px}.sidebar nav{display:flex;flex-direction:column;gap:10px}.sidebar nav a{font-size:.84rem;text-decoration:none;color:#35536a}.sidebar nav a:hover{color:var(--teal)}.sidebar-note{border-top:1px solid var(--line);margin-top:20px;padding-top:14px;font-size:.79rem;color:var(--muted)}.sidebar-note p{margin:5px 0}.section{padding:7px 0 40px;margin-bottom:25px;border-bottom:1px solid var(--line);scroll-margin-top:25px}.section:last-child{border-bottom:none}.section h2{font-size:clamp(1.45rem,2.6vw,2rem);line-height:1.24;letter-spacing:-.025em;color:var(--navy);margin:4px 0 16px}.section h3{font-size:1.14rem;margin:23px 0 10px;color:var(--navy)}.kicker{color:var(--teal);margin-bottom:3px}.section p{margin:10px 0 16px}.notice,.warning{border-left:4px solid var(--teal);background:#edf8f8;padding:16px 19px;margin:22px 0;border-radius:0 9px 9px 0}.notice p,.warning p{margin:5px 0 0}.warning{border-left-color:#bf7630;background:#fff5e8}.schedule{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:18px}.schedule>div{background:var(--surface);border-radius:9px;padding:11px 10px;border:1px solid var(--line)}.schedule b{display:block;color:var(--teal)}.schedule span{display:block;font-size:.73rem;line-height:1.4}.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.mini{padding:17px;border:1px solid var(--line);border-radius:13px;background:#fff;box-shadow:var(--shadow)}.mini strong{font-size:1.03rem;color:var(--teal)}.mini p{font-size:.9rem;margin:6px 0 0}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;font-size:.91rem}th{text-align:left;background:#173f61;color:#fff}th,td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border-bottom:0}tbody tr:nth-child(even){background:#f4f8fb}.topology{text-align:center;padding:20px 12px;border:1px solid var(--line);background:var(--surface);border-radius:14px;margin:20px 0}.nodes{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}.node{display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid #abcad6;border-radius:12px;background:#fff;min-width:96px;padding:13px;font-size:2.2rem}.node span{font-size:.79rem;font-weight:750;color:var(--navy)}.node.router{border:2px solid var(--teal)}.linkline{font-size:.7rem;font-weight:800;color:var(--teal)}.wired{font-size:.88rem;font-weight:750;color:var(--navy);margin-top:7px}.config{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:15px 0}.config div{background:#eef7f8;border-radius:9px;padding:12px}.config small{display:block;color:#56727f;font-size:.68rem;letter-spacing:.13em;font-weight:800}.config b{display:block;font-size:.94rem;color:#0d4a54}.steps{padding-left:1.4rem}.steps li{padding:0 0 14px 8px}.steps li::marker{font-weight:850;color:var(--teal)}code{padding:.12rem .3rem;background:#e7edf3;border-radius:4px;font-size:.91em;overflow-wrap:anywhere}.checklist{display:grid;gap:12px}.checklist label{padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;gap:11px;align-items:flex-start}.checklist input{width:18px;height:18px;accent-color:var(--teal);margin-top:5px;flex-shrink:0}.formgrid{display:grid;gap:16px}.formgrid label{font-weight:750;display:grid;gap:7px}.formgrid textarea{border:1px solid #b6ccd6;border-radius:10px;padding:12px;width:100%;resize:vertical;color:var(--ink);font-weight:400}.formgrid textarea:focus-visible{outline:3px solid #a9dfde}.small{font-size:.82rem;color:var(--muted)}.quiz-item{margin:15px 0;padding:18px;border:1px solid var(--line);border-radius:12px}.quiz-item h3{font-size:.98rem;margin:0 0 13px}.quiz-item label{display:flex;align-items:flex-start;gap:10px;margin:7px 0;font-size:.91rem;cursor:pointer}.quiz-item input{margin-top:5px;accent-color:var(--teal)}.quiz-item.correct{border-color:#42a28c;background:#f3fbf7}.quiz-item.incorrect{border-color:#df9c7e;background:#fff9f4}.explanation{font-size:.83rem;padding:11px 12px;margin:10px 0 0!important;border-radius:7px;background:#ecf2f5}.quiz-result{background:var(--pale);padding:16px;border-radius:12px;border:1px solid #b8dedf}.sources{font-size:.85rem;color:var(--muted)}.footer{background:var(--navy);color:#cad9e6;padding:22px 0;font-size:.79rem}.footer .container{display:flex;gap:20px;flex-wrap:wrap;justify-content:space-between}.footer a{color:#97ebe0}@media(max-width:850px){.layout{grid-template-columns:1fr;gap:0}.sidebar{position:static;margin-bottom:20px}.sidebar nav{display:flex;flex-flow:row wrap}.schedule{grid-template-columns:repeat(2,1fr)}}@media(max-width:570px){.container{width:min(100% - 30px,1140px)}.navline{align-items:flex-start;flex-direction:column;padding:14px 0}.hero{padding:31px 0}.cards,.config{grid-template-columns:1fr}.schedule{grid-template-columns:1fr}.nodes{gap:4px}.linkline{font-size:.57rem}.node{min-width:78px;padding:9px;font-size:1.65rem}}@media print{.site-head,.sidebar,.actions,.skip,.footer{display:none!important}.layout{display:block}.hero{background:#fff;color:#000;padding:10px 0}.hero h1,.hero h1 span,.hero .lede,.breadcrumbs{color:#000}.hero .facts span{color:#000}.section{page-break-inside:avoid}.formgrid textarea{height:90px}}

/* Complementos Aula 02 */
.bands{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0}.bands .band{border-radius:12px;padding:18px;border:1px solid #b3ccd7;background:#f2f8fa}.band h3{margin:0 0 4px!important;color:#0b6370}.band small{color:#536a7c}.regulatory{border-left:4px solid #d58b42;background:#fff7eb;padding:17px 19px;border-radius:0 10px 10px 0}.site-figure{max-width:100%;border:1px solid #d9e6ed;border-radius:12px;display:block;margin:14px auto}.caption{font-size:.8rem;color:#63798b;text-align:center}.formgrid select,.formgrid input[type=text]{border:1px solid #b6ccd6;border-radius:10px;padding:10px;font:inherit;width:100%}.keyline{border:1px solid #d7e6e9;padding:13px 16px;border-radius:9px;background:#f3faf9}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.two-col>div{border:1px solid var(--line);padding:14px;border-radius:10px}.numbered{border-left:3px solid var(--teal);padding-left:14px;margin:20px 0}.muted{color:var(--muted)}.statline{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}.statline span{background:#eaf8f7;color:#11575b;padding:7px 12px;border-radius:99px;font-size:.8rem;font-weight:700}@media(max-width:600px){.bands,.two-col{grid-template-columns:1fr}}


/* Aula 03: diagnostico RF */
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.metric{padding:17px;border:1px solid var(--line);background:var(--surface);border-radius:12px}.metric b{display:block;font-size:1.5rem;color:var(--teal)}.metric small{color:var(--muted)}.rangegrid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.rangegrid label{font-size:.9rem;font-weight:700;display:block}.rangegrid input{display:block;width:100%;margin:10px 0;accent-color:var(--teal)}.snr-result{border-radius:12px;border:1px solid #b4d7d7;background:#eaf8f7;padding:22px;font-size:1.08rem}.snr-result strong{font-size:2rem;color:#0c5d62}.snr-result.low{background:#fff4ed;border-color:#edc7b0}.rftable input{width:85px;border:1px solid #b7cbd7;border-radius:6px;padding:8px;font:inherit}.rftable td:last-child{font-weight:800}.rftable caption{text-align:left;padding:8px;color:var(--muted)}.obs{font-size:.82rem;color:#6a7a82}.tag{border-radius:99px;padding:2px 8px;font-size:.76rem;font-weight:800;background:#e0f4f0;color:#145e59;white-space:nowrap}.tag.warn{background:#fff0dc;color:#855426}.tag.bad{background:#fee9e5;color:#9a403d}.sep{margin:22px 0;border:0;border-top:1px solid var(--line)}.sitefigure{width:100%;max-width:750px;height:auto;border:1px solid var(--line);border-radius:14px;display:block;margin:22px auto}.figcaption{text-align:center;font-size:.8rem;color:var(--muted)}.inputrow{display:grid;gap:7px}.inputrow input,.inputrow textarea{width:100%;border:1px solid #b7cbd7;border-radius:8px;font:inherit;padding:10px}.inputrow textarea{min-height:92px}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.hidden{display:none!important}.callquote{padding:15px 18px;background:#f3f8fa;border-left:3px solid var(--teal);border-radius:6px}.quiz-item legend{font-weight:800;padding:0 7px}.footer .container{align-items:center}@media(max-width:650px){.metrics,.rangegrid,.mini-grid{grid-template-columns:1fr}.rftable input{width:64px;padding:6px}}
/* Evitar transbordamento horizontal em telas estreitas (tabelas rolam dentro da caixa). */
.content,.sidebar{min-width:0}
@media(max-width:850px){.layout{grid-template-columns:minmax(0,1fr)}}