/* ==========================================================
   IP Scanner — main stylesheet
   Light theme · Poppins · 1140px content width
   ========================================================== */

@font-face{font-family:"Poppins";src:url("../fonts/poppins-regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Poppins";src:url("../fonts/poppins-medium.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Poppins";src:url("../fonts/poppins-bold.woff2") format("woff2");font-weight:600 700;font-style:normal;font-display:swap}

:root{
  --sky:#0098d1;
  --blue:#1174b5;
  --deep:#2c69ac;
  --ink:#0f2a44;
  --text:#43596f;
  --muted:#6b8299;
  --line:#e2ebf4;
  --soft:#f3f8fd;
  --tint:#e8f4fb;
  --bg:#ffffff;
  --ok:#14966a;
  --warn:#c06a00;
  --grad:linear-gradient(135deg,#0098d1 0%,#2c69ac 100%);
  --shadow:0 18px 40px rgba(17,64,110,.10);
  --shadow-lg:0 28px 60px rgba(17,64,110,.16);
  --wrap:1140px;
  --head:72px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--head) + 16px);-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Poppins",Arial,sans-serif;font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);overflow-x:hidden;overflow-wrap:break-word}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--deep)}
h1,h2,h3,h4{font-family:"Poppins",Arial,sans-serif;color:var(--ink);line-height:1.25;margin:0 0 .6em;font-weight:700}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.2em;padding:0}
button,input,select{font-family:"Poppins",Arial,sans-serif;font-size:inherit}
:focus-visible{outline:3px solid #7fcdf0;outline-offset:3px;border-radius:6px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:200}
.skip-link:focus{top:12px;color:#fff}

/* layout */
.wrap{width:100%;max-width:calc(var(--wrap) + 40px);margin:0 auto;padding:0 20px}
.section{padding:88px 0;background:var(--bg)}
.section + .section{border-top:1px solid #eef3f8}
.sh{text-align:center;max-width:780px;margin:0 auto 52px}
.sh h2{font-size:clamp(1.65rem,3vw,2.3rem);margin-bottom:14px}
.sh p{margin:0;font-size:1.04rem;color:var(--text)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}
.ic{width:24px;height:24px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:12px 26px;border-radius:12px;font-weight:500;font-size:1rem;line-height:1.2;border:0;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;text-align:center}
.btn .ic{width:20px;height:20px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px rgba(17,116,181,.28)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 32px rgba(17,116,181,.34)}
.btn-ghost{background:#fff;color:var(--deep);border:1.5px solid #cfe0ef}
.btn-ghost:hover{border-color:var(--sky);color:var(--blue);transform:translateY(-2px)}

/* ================= HEADER ================= */
#site-header{position:sticky;top:0;z-index:100;min-height:var(--head);background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(10px);-webkit-backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid transparent;transition:box-shadow .25s ease,border-color .25s ease}
#site-header.scrolled{box-shadow:0 8px 24px rgba(17,64,110,.08);border-bottom-color:var(--line)}
.hdr{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:var(--head);gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.2rem;color:var(--ink);justify-self:start}
.brand:hover{color:var(--ink)}
.brand img{width:40px;height:40px}
.brand span b{color:var(--blue);font-weight:700}
.nav{justify-self:center}
.nav ul{display:flex;align-items:center;gap:6px;list-style:none;margin:0}
.nav a{display:block;padding:8px 14px;border-radius:10px;color:var(--ink);font-weight:500;font-size:.95rem;position:relative}
.nav a:hover{color:var(--blue);background:var(--soft)}
.nav a.active{color:var(--blue)}
.nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--grad)}
.hdr-cta{justify-self:end;display:flex;align-items:center;gap:10px}
.hdr-cta .btn{min-height:44px;padding:10px 20px;font-size:.95rem}
.menu-btn{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink);align-items:center;justify-content:center;cursor:pointer}
.menu-btn .ic-close{display:none}
.menu-open .menu-btn .ic-open{display:none}
.menu-open .menu-btn .ic-close{display:block}

/* ================= HERO ================= */
.hero{padding:52px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.2rem,4.6vw,3.5rem);margin-bottom:6px;letter-spacing:-.01em}
.hero .sub{display:block;font-size:clamp(1.05rem,2vw,1.3rem);font-weight:500;color:var(--blue);margin-bottom:18px}
.hero .lead{font-size:1.06rem;margin-bottom:26px;max-width:540px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:12px}
.hero-note{font-size:.86rem;color:var(--muted);margin:0 0 26px}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;list-style:none;margin:0}
.trust li{display:flex;align-items:center;gap:8px;font-size:.9rem;font-weight:500;color:var(--ink)}
.trust .ic{width:20px;height:20px;color:var(--sky)}
.hero-visual{position:relative}
.hero-visual img{border-radius:20px;box-shadow:var(--shadow-lg);aspect-ratio:1200/740;width:100%}
.hero-badge{position:absolute;left:-18px;bottom:-22px;display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);font-size:.86rem;line-height:1.35}
.hero-badge .ic{color:var(--ok);width:28px;height:28px}
.hero-badge strong{display:block;color:var(--ink);font-size:.95rem}

/* ================= ABOUT ================= */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-media img{border-radius:22px;aspect-ratio:1200/900;width:100%}
.about-copy p{margin-bottom:1em}
.facts{display:grid;grid-template-columns:1fr 1fr;margin:26px 0 0;border-top:1px solid var(--line)}
.facts div{padding:14px 0;border-bottom:1px solid var(--line)}
.facts div:nth-child(odd){padding-right:18px;border-right:1px solid var(--line)}
.facts div:nth-child(even){padding-left:18px}
.facts dt{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.facts dd{margin:2px 0 0;font-weight:500;color:var(--ink)}

/* ================= FEATURES (orbit layout) ================= */
.orbit{display:grid;grid-template-columns:1fr 300px 1fr;gap:34px;align-items:center}
.orbit-col{display:flex;flex-direction:column;gap:30px}
.feat{display:flex;gap:16px;align-items:flex-start;padding:10px;border-radius:14px;transition:background .25s ease,transform .25s ease}
.feat:hover{background:var(--soft);transform:translateY(-3px)}
.orbit-col.left .feat{flex-direction:row-reverse;text-align:right}
.feat-ic{width:52px;height:52px;flex:none;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--blue);background:var(--tint);transition:transform .25s ease}
.feat:hover .feat-ic{transform:rotate(-8deg) scale(1.06)}
.feat h3{font-size:1.06rem;margin-bottom:4px}
.feat p{margin:0;font-size:.93rem;line-height:1.65}
.radar{position:relative;width:300px;height:300px;border-radius:50%;margin:0 auto;background:radial-gradient(circle,#fff 0 30%,transparent 31%),repeating-radial-gradient(circle,rgba(0,152,209,.14) 0 1px,transparent 1px 34px),radial-gradient(circle,#eaf6fc,#f8fcff 70%)}
.radar::before{content:"";position:absolute;inset:0;border-radius:50%;background:conic-gradient(from 0deg,rgba(0,152,209,.32),rgba(0,152,209,0) 70deg,transparent 360deg);animation:sweep 6s linear infinite}
.radar img{position:absolute;left:50%;top:50%;width:84px;height:84px;transform:translate(-50%,-50%)}
.radar i{position:absolute;width:12px;height:12px;border-radius:50%;background:var(--sky);box-shadow:0 0 0 6px rgba(0,152,209,.15)}
@keyframes sweep{to{transform:rotate(360deg)}}

/* ================= HOW IT WORKS (track) ================= */
.track{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;list-style:none;margin:0;position:relative}
.track::before{content:"";position:absolute;top:38px;left:12%;right:12%;height:2px;background:repeating-linear-gradient(90deg,#9fd4ee 0 10px,transparent 10px 18px)}
.track li{text-align:center;position:relative}
.track-ic{width:76px;height:76px;margin:0 auto 20px;border-radius:50%;background:#fff;border:2px solid #bfe3f4;display:flex;align-items:center;justify-content:center;color:var(--blue);position:relative;z-index:1;transition:border-color .25s ease,box-shadow .25s ease}
.track li:hover .track-ic{border-color:var(--sky);box-shadow:0 10px 24px rgba(0,152,209,.2)}
.track-ic .ic{width:30px;height:30px}
.track h3{font-size:1.08rem;margin-bottom:6px}
.track p{font-size:.93rem;margin:0}

/* ================= COMPATIBILITY (table) ================= */
.compat{width:100%;border-collapse:separate;border-spacing:0;font-size:.96rem}
.compat th{background:var(--soft);color:var(--ink);font-weight:500;text-align:left;padding:14px 18px;border-bottom:1px solid var(--line)}
.compat th:first-child{border-top-left-radius:14px}.compat th:last-child{border-top-right-radius:14px}
.compat td{padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:middle}
.compat tr{transition:background .2s ease}
.compat tbody tr:hover{background:#fafdff}
.plat{display:flex;align-items:center;gap:12px;font-weight:500;color:var(--ink)}
.plat .ic{color:var(--blue)}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;font-weight:500;padding:4px 12px;border-radius:999px}
.tag .ic{width:16px;height:16px}
.tag.yes{background:#e6f6ef;color:var(--ok)}
.tag.alt{background:#fff4e3;color:var(--warn)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:14px}
.table-scroll table{min-width:620px}

/* ================= USE CASES (tabs) ================= */
.uc{display:grid;grid-template-columns:330px 1fr;gap:40px;align-items:start}
.uc-tabs{display:flex;flex-direction:column;gap:6px;border-left:2px solid var(--line)}
.uc-tab{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:14px 18px;background:none;border:0;border-left:3px solid transparent;margin-left:-2px;color:var(--text);font-weight:500;cursor:pointer;transition:color .2s ease,background .2s ease;border-radius:0 12px 12px 0}
.uc-tab .ic{color:var(--muted)}
.uc-tab:hover{background:var(--soft);color:var(--ink)}
.uc-tab[aria-selected="true"]{border-left-color:var(--sky);color:var(--blue);background:var(--soft)}
.uc-tab[aria-selected="true"] .ic{color:var(--sky)}
.uc-panel{padding:6px 0 0}
.uc-panel[hidden]{display:none}
.uc-panel .big-ic{width:64px;height:64px;border-radius:18px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.uc-panel .big-ic .ic{width:30px;height:30px}
.uc-panel h3{font-size:1.45rem}
.ticks{list-style:none;margin:18px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px}
.ticks li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.ticks .ic{width:20px;height:20px;color:var(--ok);margin-top:3px}

/* ================= BENEFITS (split statement) ================= */
.ben{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.ben-lead{position:sticky;top:110px}
.ben-lead .quote{font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:700;line-height:1.35;color:var(--ink);margin-bottom:18px}
.ben-lead .quote span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ben-list{list-style:none;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:34px 30px}
.ben-list li:nth-child(even){transform:translateY(34px)}
.ben-item{transition:transform .25s ease}
.ben-item:hover .ben-ic{background:var(--grad);color:#fff}
.ben-ic{width:48px;height:48px;border-radius:14px;border:1.5px solid #cbe6f4;color:var(--blue);display:flex;align-items:center;justify-content:center;margin-bottom:14px;transition:background .25s ease,color .25s ease}
.ben-item h3{font-size:1.04rem;margin-bottom:6px}
.ben-item p{font-size:.93rem;margin:0}

/* ================= DOWNLOAD (banner) ================= */
.dl{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;border-radius:28px;padding:48px;background:linear-gradient(120deg,#effaff 0%,#e5f0fb 100%);border:1px solid #d6e9f6;position:relative;overflow:hidden}
.dl::after{content:"";position:absolute;right:-120px;top:-120px;width:320px;height:320px;border-radius:50%;border:40px solid rgba(0,152,209,.07)}
.dl h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.dl-meta{display:flex;flex-wrap:wrap;gap:0;margin:20px 0 26px;list-style:none;border-top:1px solid #cfe3f2;border-bottom:1px solid #cfe3f2}
.dl-meta li{flex:1 1 50%;padding:12px 14px 12px 0;font-size:.9rem;display:flex;gap:10px;align-items:center}
.dl-meta .ic{color:var(--blue);width:20px;height:20px}
.dl-meta strong{color:var(--ink);font-weight:500}
.dl-file{font-size:.84rem;color:var(--muted);margin:14px 0 0;word-break:break-all}
.dl-media img{border-radius:18px;box-shadow:var(--shadow-lg);aspect-ratio:1200/900;width:100%}
.dl .btn-primary{min-height:56px;padding:14px 32px;font-size:1.05rem}

/* ================= INSTALL (zig-zag timeline) ================= */
.zig{list-style:none;margin:0 auto;max-width:960px;position:relative}
.zig::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(var(--sky),#cfe6f4);transform:translateX(-50%)}
.zig li{display:grid;grid-template-columns:1fr 64px 1fr;gap:24px;align-items:center;margin-bottom:34px}
.zig li:last-child{margin-bottom:0}
.zig .node{width:64px;height:64px;border-radius:50%;background:#fff;border:2px solid var(--sky);color:var(--blue);display:flex;align-items:center;justify-content:center;position:relative;z-index:1}
.zig .txt h3{font-size:1.08rem;margin-bottom:4px}
.zig .txt p{margin:0;font-size:.94rem}
.zig li:nth-child(odd) .txt{grid-column:1;text-align:right}
.zig li:nth-child(odd) .node{grid-column:2;grid-row:1}
.zig li:nth-child(even) .txt{grid-column:3}
.zig li:nth-child(even) .node{grid-column:2;grid-row:1}

/* ================= RANGE PLANNER (tool) ================= */
.planner{display:grid;grid-template-columns:400px minmax(0,1fr);border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.planner-form{padding:30px;background:var(--soft);border-right:1px solid var(--line)}
.planner-form h3{font-size:1.15rem}
.field{margin-bottom:16px}
.field label{display:block;font-weight:500;color:var(--ink);font-size:.92rem;margin-bottom:6px}
.field input,.field select{width:100%;height:48px;border:1.5px solid #cddfee;border-radius:10px;padding:0 14px;background:#fff;color:var(--ink);font-size:1rem}
.field input:focus,.field select:focus{border-color:var(--sky);outline:none;box-shadow:0 0 0 4px rgba(0,152,209,.15)}
.field input[aria-invalid="true"]{border-color:#d0453b}
.err{color:#b3261e;font-size:.86rem;margin-top:6px;min-height:1.2em}
.planner-actions{display:flex;gap:10px;flex-wrap:wrap}
.planner-actions .btn{flex:1 1 auto;min-height:46px;padding:10px 16px;white-space:nowrap}
.planner-out{padding:30px}
.out-range{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px dashed #cfe0ef;margin-bottom:6px}
.out-range span{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.out-range output{display:block;font-size:clamp(1.05rem,2.2vw,1.4rem);font-weight:700;color:var(--blue);word-break:break-all}
.out-grid{display:grid;grid-template-columns:repeat(3,1fr);margin:0}
.out-grid div{padding:16px 12px 16px 0;border-bottom:1px solid var(--line)}
.out-grid dt{font-size:.8rem;color:var(--muted)}
.out-grid dd{margin:2px 0 0;font-weight:500;color:var(--ink);word-break:break-all}
.out-note{margin:16px 0 0;font-size:.9rem;display:flex;gap:10px;align-items:flex-start}
.out-note .ic{color:var(--blue);margin-top:2px;width:20px;height:20px}
.copy-btn{min-height:40px!important;padding:8px 16px!important;font-size:.88rem!important}

/* ================= SAFETY (ruled list) ================= */
.rules{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;list-style:none;margin:0}
.rules li{display:flex;gap:18px;padding:22px 0;border-bottom:1px dashed #cfe0ef}
.rules li:nth-last-child(-n+2){border-bottom:0}
.rules .ic{width:28px;height:28px;color:var(--sky);margin-top:2px}
.rules h3{font-size:1.04rem;margin-bottom:4px}
.rules p{margin:0;font-size:.93rem}

/* ================= PROS & CONS ================= */
.pc{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:22px;overflow:hidden;border:1px solid var(--line)}
.pc-col{padding:34px}
.pc-col + .pc-col{border-left:1px solid var(--line)}
.pc-col h3{display:flex;align-items:center;gap:12px;font-size:1.3rem;margin-bottom:20px}
.pc-col h3 .ic{width:34px;height:34px;padding:7px;border-radius:10px}
.pc-pros h3 .ic{background:#e6f6ef;color:var(--ok)}
.pc-cons h3 .ic{background:#fff1e0;color:var(--warn)}
.pc-col ul{list-style:none;margin:0}
.pc-col li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;font-size:.96rem;border-radius:10px;transition:background .2s ease,padding .2s ease}
.pc-col li:hover{background:var(--soft);padding-left:8px}
.pc-pros li .ic{color:var(--ok);width:22px;height:22px;margin-top:2px}
.pc-cons li .ic{color:var(--warn);width:22px;height:22px;margin-top:2px}

/* ================= RELEASE (spec strip) ================= */
.spec{display:grid;grid-template-columns:repeat(4,1fr);margin:0 0 30px;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}
.spec div{padding:22px 20px}
.spec div + div{border-left:1px solid var(--line)}
.spec dt{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.spec dd{margin:4px 0 0;font-size:1.08rem;font-weight:700;color:var(--ink);word-break:break-word}
.release-copy{columns:2;column-gap:48px}
.release-copy p{break-inside:avoid}

/* ================= TROUBLESHOOTING (symptom -> fix) ================= */
.fixes{list-style:none;margin:0}
.fixes li{display:grid;grid-template-columns:56px 1fr 40px 1.3fr;gap:18px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
.fixes li:first-child{border-top:1px solid var(--line)}
.fix-ic{width:56px;height:56px;border-radius:16px;background:#fff5e8;color:var(--warn);display:flex;align-items:center;justify-content:center}
.fixes h3{font-size:1.02rem;margin:0}
.fixes .arrow{color:var(--sky)}
.fixes p{margin:0;font-size:.94rem}

/* ================= GUIDES PREVIEW / BLOG CARDS ================= */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cfe3f2}
.card-img{aspect-ratio:16/9;overflow:hidden;background:var(--soft)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:1.08rem;margin-bottom:8px}
.card-body h3 a{color:var(--ink)}
.card-body h3 a:hover{color:var(--blue)}
.card-body p{font-size:.92rem;margin-bottom:16px}
.more{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-weight:500;font-size:.92rem}
.more .ic{width:18px;height:18px;transition:transform .2s ease}
.card:hover .more .ic{transform:translateX(4px)}
.center-cta{text-align:center;margin-top:40px}

/* ================= FAQ ================= */
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.faq-cat{display:flex;align-items:center;gap:12px;font-size:1.2rem;margin-bottom:16px;padding-bottom:14px;border-bottom:2px solid var(--ink)}
.faq-cat .ic{color:var(--sky)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;background:none;border:0;text-align:left;color:var(--ink);font-weight:500;font-size:.98rem;line-height:1.5;cursor:pointer}
.faq-q:hover{color:var(--blue)}
.faq-ic{width:30px;height:30px;flex:none;border-radius:50%;background:var(--soft);display:flex;align-items:center;justify-content:center;color:var(--blue);transition:background .2s ease,transform .25s ease}
.faq-ic .ic{width:16px;height:16px}
.faq-ic .v{transition:opacity .2s ease}
.faq-q[aria-expanded="true"] .faq-ic{background:var(--grad);color:#fff}
.faq-q[aria-expanded="true"] .faq-ic .v{opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-a > div{overflow:hidden}
.faq-a p{margin:0 0 18px;font-size:.94rem}
.faq-item.open .faq-a{grid-template-rows:1fr}

/* ================= FOOTER ================= */
#site-footer{background:var(--soft);border-top:1px solid var(--line);padding:64px 0 0;font-size:.94rem}
.ft{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1fr;gap:40px;padding-bottom:44px}
.ft p{margin:16px 0 0;max-width:360px}
.ft h3{font-size:1rem;margin-bottom:16px}
.ft ul{list-style:none;margin:0}
.ft li{margin-bottom:10px}
.ft a{color:var(--text);text-decoration:none}
.ft a:hover{color:var(--blue)}
.ft-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:.88rem;color:var(--muted)}
.ft-bottom p{margin:0}
.ft-bottom a{color:var(--blue);text-decoration:none;font-weight:500}

.to-top{position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:14px;border:0;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 26px rgba(17,116,181,.3);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s ease,transform .25s ease,visibility .25s;z-index:90}
.to-top.show{opacity:1;visibility:visible;transform:none}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}

/* ================= INNER PAGES ================= */
.page-head{padding:56px 0 40px;text-align:center;border-bottom:1px solid #eef3f8}
.page-head h1{font-size:clamp(1.9rem,4vw,2.8rem);margin-bottom:12px}
.page-head p{max-width:780px;margin:0 auto;font-size:1.04rem}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;list-style:none;margin:0 0 14px;font-size:.86rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:#b8c8d8}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--blue)}
.prose{max-width:820px;margin:0 auto}
.prose h2{font-size:1.5rem;margin-top:1.6em}
.prose h3{font-size:1.15rem;margin-top:1.3em}
.prose ul{padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:26px;margin-bottom:8px}
.prose ul li::before{content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--sky)}
.mail{display:inline-block;font-weight:500;color:var(--ink);background:var(--soft);padding:12px 20px;border-radius:12px;border:1px solid var(--line);user-select:all}

/* article */
.art-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;padding:44px 0 80px}
.art-head .crumbs{justify-content:flex-start}
.art-head h1{font-size:clamp(1.8rem,3.6vw,2.55rem);margin-bottom:14px}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.88rem;color:var(--muted);margin-bottom:24px}
.art-meta span{display:flex;align-items:center;gap:6px}
.art-meta .ic{width:17px;height:17px}
.art-figure{margin:0 0 30px}
.art-figure img{border-radius:18px;border:1px solid var(--line);aspect-ratio:16/9;width:100%}
.art-figure figcaption{font-size:.84rem;color:var(--muted);margin-top:10px;text-align:center}
.article{font-size:1.04rem;line-height:1.8}
.article p{margin-bottom:1.15em}
.article h2{font-size:1.55rem;margin:1.7em 0 .7em;padding-top:4px}
.article h3{font-size:1.18rem;margin:1.4em 0 .55em}
.article ul{list-style:none;margin:0 0 1.4em}
.article ul li{position:relative;padding-left:28px;margin-bottom:9px}
.article ul li::before{content:"";position:absolute;left:4px;top:.68em;width:9px;height:9px;border-radius:3px;background:var(--grad)}
.article .tbl{overflow-x:auto;margin:0 0 1.6em;border:1px solid var(--line);border-radius:14px}
.article table{width:100%;border-collapse:collapse;font-size:.94rem;min-width:520px}
.article th{background:var(--soft);color:var(--ink);font-weight:500;text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.article td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.article tr:last-child td{border-bottom:0}
.article .note{border-left:4px solid var(--sky);background:var(--soft);padding:16px 20px;border-radius:0 12px 12px 0;margin:0 0 1.5em}
.article .note p{margin:0}
.art-faq .faq-item:first-child{border-top:1px solid var(--line)}
.sidebar{position:sticky;top:calc(var(--head) + 20px);max-height:calc(100vh - var(--head) - 40px);overflow-y:auto;overscroll-behavior:contain;padding-right:6px;scrollbar-width:thin;scrollbar-color:#bcd7ea transparent}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:#bcd7ea;border-radius:6px}
.side-block{padding:0 0 24px;margin-bottom:24px;border-bottom:1px solid var(--line)}
.side-block:last-child{border-bottom:0;margin-bottom:0}
.side-block h2{font-size:1rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-block h2 .ic{width:20px;height:20px;color:var(--sky)}
.toc{list-style:none;margin:0;border-left:2px solid var(--line)}
.toc a{display:block;padding:6px 0 6px 14px;margin-left:-2px;border-left:2px solid transparent;color:var(--text);font-size:.9rem;line-height:1.45}
.toc a:hover{color:var(--blue)}
.toc a.active{color:var(--blue);border-left-color:var(--sky);font-weight:500}
.side-links{list-style:none;margin:0}
.side-links li{margin-bottom:12px}
.side-links a{display:grid;grid-template-columns:72px 1fr;gap:12px;align-items:center;color:var(--ink);font-size:.88rem;font-weight:500;line-height:1.4}
.side-links img{border-radius:8px;aspect-ratio:16/9;object-fit:cover;width:72px}
.side-links a:hover{color:var(--blue)}
.side-cta{background:linear-gradient(135deg,#effaff,#e5f0fb);border:1px solid #d6e9f6;border-radius:16px;padding:20px}
.side-cta p{font-size:.9rem;margin-bottom:14px}
.side-cta .btn{width:100%;min-height:46px}
.related{padding:0 0 84px}
.related h2{text-align:center;font-size:1.6rem;margin-bottom:28px}

/* ================= RESPONSIVE ================= */
@media (max-width:1100px){
  .orbit{grid-template-columns:1fr 1fr;gap:26px}
  .orbit .radar-wrap{grid-column:1/-1;order:-1}
  .orbit-col.left .feat{flex-direction:row;text-align:left}
  .radar{width:240px;height:240px}
}
@media (max-width:1024px){
  .nav a{padding:8px 10px;font-size:.9rem}
  .hero-grid,.about-grid,.dl,.ben{grid-template-columns:minmax(0,1fr)}
  .hero-grid{gap:56px}
  .ben-lead{position:static}
  .uc{grid-template-columns:280px 1fr}
  .planner{grid-template-columns:minmax(0,1fr)}
  .planner-form{border-right:0;border-bottom:1px solid var(--line)}
  .art-layout{grid-template-columns:minmax(0,1fr)}
  .sidebar{position:static;max-height:none;overflow:visible}
  .cards{grid-template-columns:1fr 1fr}
  .ft{grid-template-columns:1fr 1fr}
  .fixes li{grid-template-columns:56px 1fr;gap:10px 18px}
  .fixes .arrow{display:none}
  .fixes p{grid-column:2}
}
@media (max-width:900px){
  :root{--head:66px}
  .hdr{grid-template-columns:1fr auto}
  .menu-btn{display:inline-flex}
  .hdr-cta .btn{display:none}
  .nav{position:fixed;left:0;right:0;top:var(--head);background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(17,64,110,.1);padding:12px 20px 22px;transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;max-height:calc(100vh - var(--head));overflow-y:auto}
  .menu-open .nav{opacity:1;visibility:visible;transform:none}
  .nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .nav a{padding:12px 14px;font-size:1rem}
  .nav a.active::after{display:none}
  .nav .nav-dl{display:block;margin-top:10px}
  .nav .nav-dl .btn{width:100%}
  .uc{grid-template-columns:minmax(0,1fr)}
  .uc-tabs{flex-direction:row;overflow-x:auto;border-left:0;border-bottom:2px solid var(--line);gap:0;scrollbar-width:none}
  .uc-tab{white-space:nowrap;border-left:0;border-bottom:3px solid transparent;margin:0 0 -2px;border-radius:10px 10px 0 0;width:auto}
  .uc-tab[aria-selected="true"]{border-bottom-color:var(--sky)}
  .track{grid-template-columns:1fr 1fr;row-gap:40px}
  .track::before{display:none}
  .spec{grid-template-columns:1fr 1fr}
  .spec div:nth-child(3){border-left:0}
  .spec div:nth-child(n+3){border-top:1px solid var(--line)}
  .release-copy{columns:1}
  .faq-cols{grid-template-columns:minmax(0,1fr);gap:44px}
}
@media (min-width:901px){.nav .nav-dl{display:none}}
@media (max-width:768px){
  .section{padding:64px 0}
  .sh{margin-bottom:38px}
  .rules{grid-template-columns:minmax(0,1fr)}
  .rules li:nth-last-child(2){border-bottom:1px dashed #cfe0ef}
  .pc{grid-template-columns:minmax(0,1fr)}
  .pc-col + .pc-col{border-left:0;border-top:1px solid var(--line)}
  .ben-list{grid-template-columns:minmax(0,1fr);gap:28px}
  .ben-list li:nth-child(even){transform:none}
  .zig::before{left:32px}
  .zig li{grid-template-columns:64px minmax(0,1fr);gap:18px}
  .zig li:nth-child(odd) .txt,.zig li:nth-child(even) .txt{grid-column:2;text-align:left}
  .zig li .node{grid-column:1!important}
  .dl{padding:30px 22px}
  .ticks{grid-template-columns:minmax(0,1fr)}
  .out-grid{grid-template-columns:1fr 1fr}
  .cards{grid-template-columns:minmax(0,1fr)}
  .hero-badge{left:10px;bottom:-26px}
}
@media (max-width:600px){
  .orbit{grid-template-columns:minmax(0,1fr)}
  .orbit-col{gap:18px}
  .facts{grid-template-columns:minmax(0,1fr)}
  .facts div:nth-child(odd){border-right:0;padding-right:0}
  .facts div:nth-child(even){padding-left:0}
  .ft{grid-template-columns:minmax(0,1fr);gap:30px}
  .ft-bottom{flex-direction:column}
  .dl-meta li{flex-basis:100%}
}
@media (max-width:480px){
  .wrap{padding:0 16px}
  .hero{padding:34px 0 56px}
  .hero-actions .btn{width:100%}
  .track{grid-template-columns:minmax(0,1fr)}
  .spec{grid-template-columns:minmax(0,1fr)}
  .spec div + div{border-left:0;border-top:1px solid var(--line)}
  .out-grid{grid-template-columns:minmax(0,1fr)}
  .pc-col{padding:24px 18px}
  .planner-form,.planner-out{padding:22px 18px}
  .brand{font-size:1.05rem}
  .brand img{width:34px;height:34px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}
@media (max-width:600px){
  .hero-badge{position:relative;left:auto;bottom:auto;margin:-26px 14px 0;width:auto}
}

/* Calculator results are only revealed after submitting the form */
.planner-out[hidden]{display:none!important}
.planner-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px;min-height:300px;color:var(--muted)}
.planner-placeholder .ic{width:40px;height:40px;color:var(--blue)}
.planner-placeholder h3{color:var(--ink);font-size:1.14rem;margin:0}
.planner-placeholder p{max-width:350px;margin:0;line-height:1.7}