:root{
  --navy:#0b1f2a;--navy2:#12303f;--teal:#1c4a5e;--gold:#e8b44a;--gold2:#c9932a;
  --ink:#1c2430;--muted:#5d7280;--line:#d9e3e8;--bg:#f7fafb;--bg2:#eef4f6;--white:#fff;
  --sans:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:Georgia,Cambria,"Times New Roman",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:4rem}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img,canvas{max-width:100%}
a{color:var(--teal)}
h1,h2,h3,h4{line-height:1.15;margin:0 0 .6em;letter-spacing:-.01em}
h2{font-size:clamp(1.6rem,3.5vw,2.4rem);color:var(--navy2)}
h3{font-size:1.15rem;color:var(--teal)}
p{margin:0 0 1em}
.wrap{max-width:68rem;margin:0 auto;padding:0 1.25rem}
.wrap.narrow{max-width:44rem}

/* topbar */
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem max(1.25rem,(100% - 68rem)/2 + 1.25rem);background:rgba(11,31,42,.92);backdrop-filter:blur(8px);color:#eef6f8}
.brand{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.02em;font-size:1.05rem}
.brand span{color:var(--gold)}
.topbar nav{display:none;gap:1.1rem;align-items:center}
.topbar nav a{color:#cfe6ec;text-decoration:none;font-size:.92rem}
.topbar nav a:hover{color:#fff}
.topbar nav a.cta{background:var(--gold);color:var(--navy);padding:.4rem .9rem;border-radius:999px;font-weight:600}
@media(min-width:60rem){.topbar nav{display:flex}}

/* hero */
.hero{position:relative;min-height:auto;display:flex;align-items:center;background:linear-gradient(180deg,var(--navy2) 0%,var(--navy) 100%);color:#eef6f8;overflow:hidden;isolation:isolate}
.hero-inner{max-width:68rem;margin:0 auto;padding:3.5rem 1.25rem 3rem;width:100%}
.kicker{font-size:.8rem;letter-spacing:.24em;text-transform:uppercase;color:#8fd0e0;margin-bottom:1.2rem}
.hero h1{font-size:clamp(2rem,5.5vw,3.9rem);color:#fff}
.hero .lead{font-size:clamp(1.05rem,1.8vw,1.3rem);color:#cfe6ec;font-weight:300}
.actions{display:flex;flex-wrap:wrap;gap:.8rem;margin:1.8rem 0 2.6rem}
.btn{display:inline-block;background:var(--gold);color:var(--navy);font-weight:600;text-decoration:none;padding:.8rem 1.4rem;border-radius:.5rem;border:0;font-size:1rem;cursor:pointer;font-family:inherit}
.btn:hover{background:#f2c66a}
.btn.ghost{background:transparent;color:#fff;border:1px solid #4c8296}
.btn.ghost:hover{border-color:#8fd0e0}
.stats{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;max-width:none}
.stats li{border-top:2px solid var(--gold);padding-top:.6rem}
.stats strong{display:block;font-size:1.7rem;color:#fff}
.stats span{font-size:.85rem;color:#9fc3ce}
@media(min-width:48rem){.stats{grid-template-columns:repeat(4,1fr)}}

/* sections */
.section{padding:4.5rem 0}
.section.alt{background:var(--bg2)}
.section.dark{background:var(--navy2);color:#dfeef2}
.section.dark h2,.section.dark h3{color:#fff}
.section.dark .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);color:#dfeef2}
.section.highlight{background:linear-gradient(180deg,var(--navy) 0%,#0e2733 100%);color:#eef6f8}
.section.highlight h2{color:#fff}
.num{font-family:var(--serif);color:var(--gold2);font-size:.95rem;letter-spacing:.2em;margin-bottom:.3rem}
.section.dark .num,.section.highlight .num{color:var(--gold)}
blockquote{margin:0 0 1.5rem;padding-left:1rem;border-left:3px solid var(--gold);font-family:var(--serif);font-style:italic;font-size:1.2rem;color:#33505e}
.big{font-size:clamp(1.15rem,2vw,1.45rem);line-height:1.5;max-width:60ch}
.cols{columns:1;gap:2.5rem}
@media(min-width:48rem){.cols{columns:2}}
.note{font-size:.95rem;color:#9fc3ce;border-top:1px solid rgba(255,255,255,.15);padding-top:1rem;margin-top:1.5rem}

/* cards */
.cards{display:grid;gap:1rem;margin:1.5rem 0}
.cards.two{grid-template-columns:1fr}
.cards.three{grid-template-columns:1fr}
@media(min-width:48rem){.cards.two{grid-template-columns:1fr 1fr}.cards.three{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--white);border:1px solid var(--line);border-radius:.75rem;padding:1.4rem}
.card.accent{border-top:4px solid var(--gold)}
.card p:last-child{margin:0}

/* rules grid */
.rules{display:grid;gap:1rem;margin-top:1.5rem;grid-template-columns:1fr}
@media(min-width:48rem){.rules{grid-template-columns:1fr 1fr}}
.rule{background:var(--white);border-left:4px solid var(--teal);border-radius:.4rem;padding:1.1rem 1.3rem;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.rule h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--navy2);margin-bottom:.5rem}
.rule h3{font-size:1.03rem;color:var(--navy2);margin-bottom:.45rem}
.rule p:last-child{margin:0;font-size:.97rem}

/* table */
.table-wrap{overflow-x:auto;margin:1rem 0 2rem;border:1px solid var(--line);border-radius:.6rem;background:var(--white)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:36rem}
th,td{padding:.7rem .9rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--navy2);color:#fff;font-weight:600}
tbody th{font-weight:600;color:var(--teal);white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}

/* flow diagram */
.flow{margin:2rem 0 0;display:flex;flex-direction:column;align-items:stretch;gap:.4rem}
.flow .node{background:var(--white);border:1px solid var(--line);border-radius:.6rem;padding:.8rem 1rem;font-weight:600;color:var(--navy2);text-align:center}
.flow .node.hl{border-color:var(--gold);background:#fff8e8}
.flow .node small{display:block;font-weight:400;color:var(--muted);font-size:.82rem}
.flow .arrow{font-size:.78rem;color:var(--muted);text-align:center;position:relative;padding:.6rem 0}
.flow .arrow::before{content:"↓";display:block;font-size:2rem;line-height:1;color:var(--teal)}
.flow .arrow.bad::before{color:#c2762a}
.flow .arrow.dashed::before{content:"⇅"}
.flow .arrow::before{animation:flow-y 1.8s ease-in-out infinite}
.flow .arrow.dashed::before{animation:flow-push 1.8s ease-in-out infinite}
.flow .node.hl{animation:flow-hl 3.6s ease-in-out infinite}
@keyframes flow-y{0%,100%{transform:translateY(-.3rem);opacity:.45}50%{transform:translateY(.3rem);opacity:1}}
@keyframes flow-push{0%,100%{transform:translateY(-.3rem)}50%{transform:translateY(.3rem)}}
@keyframes flow-hl{0%,100%{box-shadow:0 0 0 0 rgba(200,150,40,0)}55%{box-shadow:0 0 0 .35rem rgba(200,150,40,.18)}}
.flow figcaption{width:100%;text-align:center;font-size:.82rem;color:var(--muted);margin-top:.8rem}
@media(min-width:48rem){
  .flow{flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:center}
  .flow .node{flex:1 1 9rem}
  .flow .arrow{flex:0 0 7rem;padding:0}
  .flow .arrow::before{content:"→";font-size:2.4rem}
  .flow .arrow.dashed::before{content:"⇄"}
  .flow .arrow::before{animation:flow-x 1.8s ease-in-out infinite}
  .flow .arrow.dashed::before{animation:flow-x 1.8s ease-in-out infinite .5s}
  @keyframes flow-x{0%,100%{transform:translateX(-.55rem);opacity:.45}50%{transform:translateX(.55rem);opacity:1}}
}

/* tags */
.tags{list-style:none;padding:0;margin:0 0 1.5rem;display:flex;flex-wrap:wrap;gap:.5rem}
.tags li{border:1px solid #9fc3ce;border-radius:999px;padding:.3rem .85rem;font-size:.85rem;color:var(--teal);background:var(--white)}

/* steps */
.steps{list-style:none;counter-reset:s;padding:0;margin:1.5rem 0 0;display:grid;gap:1rem}
@media(min-width:48rem){.steps{grid-template-columns:1fr 1fr}}
.steps li{counter-increment:s;background:var(--white);border:1px solid var(--line);border-radius:.75rem;padding:1.3rem 1.3rem 1.3rem 3.6rem;position:relative}
.steps li::before{content:counter(s);position:absolute;left:1.1rem;top:1.15rem;width:1.8rem;height:1.8rem;border-radius:50%;background:var(--gold);color:var(--navy);font-weight:700;display:grid;place-items:center;font-size:.9rem}
.steps h3{font-size:1.05rem;margin-bottom:.3rem}
.steps p{margin:0;font-size:.95rem}

/* compare */
.compare{display:grid;grid-template-columns:1fr;gap:.8rem;align-items:center;margin:2rem 0;text-align:center}
@media(min-width:48rem){.compare{grid-template-columns:1fr auto 1fr}}
.side{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:.75rem;padding:1.4rem}
.side.gold{border-color:var(--gold)}
.side .label{display:block;font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:#8fd0e0;margin-bottom:.4rem}
.side strong{display:block;font-size:clamp(2rem,5vw,3rem);color:#fff;line-height:1.1}
.side.gold strong{color:var(--gold)}
.side span:last-child{font-size:.9rem;color:#b9d6de}
.vs{font-family:var(--serif);font-style:italic;color:#8fd0e0;font-size:1.3rem}

/* form */
form{display:grid;gap:.5rem;margin-top:1.5rem}
label{font-size:.9rem;font-weight:600;color:#cfe6ec}
input,textarea{font:inherit;padding:.8rem .9rem;border-radius:.5rem;border:1px solid #4c8296;background:rgba(255,255,255,.06);color:#fff;width:100%}
input:focus,textarea:focus{outline:2px solid var(--gold);outline-offset:1px;border-color:var(--gold)}
textarea{resize:vertical;min-height:9rem}
form .btn{justify-self:start;margin-top:.6rem}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.msg{min-height:1.5em;margin:.3rem 0 0;font-size:.95rem}
.msg.ok{color:#9be7a8}.msg.err{color:#ffb3a7}

/* reveal ao rolar (data-r vem do main.js) */
[data-r]{opacity:0;transform:translateY(16px);transition:opacity .55s ease-out,transform .55s ease-out}
[data-r].in{opacity:1;transform:none}
.tags li[data-r]{transform:translateY(8px) scale(.94)}
.side[data-r]{transform:translateY(0) scale(.96)}
.side.gold.in{animation:pulse-gold 4s ease-in-out 1s infinite}
@keyframes pulse-gold{0%,100%{box-shadow:0 0 0 0 rgba(232,180,74,0)}50%{box-shadow:0 0 0 .5rem rgba(232,180,74,.12)}}

/* ícones (sprite inline em index.html) */
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ic{width:1.4rem;height:1.4rem;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;color:var(--gold2);transition:transform .25s ease}
.rule h3,.rule h4,.card h3,.steps h3{display:flex;align-items:center;gap:.55em}
.steps h3 .ic{color:var(--teal)}
.section.dark .ic,.section.highlight .ic{color:var(--gold)}
.rule:hover .ic,.card:hover .ic,.steps li:hover .ic{transform:scale(1.18) rotate(-8deg)}
.tags li{display:inline-flex;align-items:center;gap:.45em}
.tag-ic{width:1.05em;height:1.05em;color:inherit}

/* micro-interações */
.card,.rule,.steps li{transition:transform .25s ease,box-shadow .25s ease}
.card:hover,.rule:hover,.steps li:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(11,31,42,.10)}
.steps li::before{transition:transform .25s ease}
.steps li:hover::before{transform:scale(1.15) rotate(-6deg)}
.btn{transition:transform .18s ease,background .2s ease,border-color .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.topbar nav a{position:relative}
.topbar nav a:not(.cta)::after{content:"";position:absolute;left:0;right:0;bottom:-.25rem;height:2px;background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.topbar nav a:not(.cta):hover::after{transform:scaleX(1)}
.tags li{transition:transform .2s ease,background .2s ease,color .2s ease}
.tags li:hover{transform:translateY(-2px);background:var(--teal);color:#fff}

/* botões de compartilhamento (só ícone) */
.share{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.8rem 0 0}
.share a{display:grid;place-items:center;width:3rem;height:3rem;padding:0;border-radius:50%}
.share svg{width:1.45rem;height:1.45rem;fill:currentColor;display:block}

/* footer */
.footer{padding:2.5rem 0;background:var(--navy);color:#9fc3ce;font-size:.92rem}
.footer a{color:var(--gold)}
.footer .small{font-size:.8rem;opacity:.8}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.flow .arrow::before,.flow .node.hl,.side.gold.in{animation:none}[data-r]{opacity:1;transform:none;transition:none}}