/* =========================================================
   TCP Port Scanner — SEOWebChecker.com
   ========================================================= */

:root{
  --bg:#f7f8fb;
  --bg-alt:#ffffff;
  --surface:#ffffff;
  --surface-2:#f1f3f8;
  --border:#e2e5ee;
  --text:#151a2c;
  --text-dim:#5a6178;
  --brand:#3b5bfd;
  --brand-dark:#2a41c9;
  --brand-light:#eef1ff;
  --accent:#00c896;
  --danger:#e5484d;
  --warn:#f5a623;
  --radius:12px;
  --radius-lg:18px;
  --shadow:0 4px 16px rgba(20,25,50,.06);
  --shadow-lg:0 12px 32px rgba(20,25,50,.10);
  --font-body:'Inter',system-ui,-apple-system,Segoe UI,sans-serif;
  --font-head:'Outfit',system-ui,-apple-system,Segoe UI,sans-serif;
  --header-h:68px;
}

[data-theme="dark"]{
  --bg:#0c0f1a;
  --bg-alt:#10131f;
  --surface:#141827;
  --surface-2:#1b2033;
  --border:#262c42;
  --text:#eef0f7;
  --text-dim:#9aa1bb;
  --brand:#6b84ff;
  --brand-dark:#4d63e0;
  --brand-light:#1a2140;
  --shadow:0 4px 16px rgba(0,0,0,.35);
  --shadow-lg:0 16px 40px rgba(0,0,0,.45);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .25s ease,color .25s ease;
}
h1,h2,h3,h4{font-family:var(--font-head);margin:0 0 .5em;line-height:1.2;color:var(--text);}
p{margin:0 0 1em;color:var(--text-dim);}
a{color:var(--brand);text-decoration:none;}
img{max-width:100%;display:block;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
section{padding:64px 0;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;}

/* Skip link */
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:9999;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}

/* ---------- Cookie banner ---------- */
.cookie-banner{
  position:fixed;left:0;right:0;bottom:0;z-index:1200;
  background:var(--surface);border-top:1px solid var(--border);
  box-shadow:var(--shadow-lg);
  padding:16px 20px;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:center;
  transform:translateY(120%);transition:transform .4s ease;
}
.cookie-banner.show{transform:translateY(0);}
.cookie-banner p{margin:0;color:var(--text);font-size:.92rem;max-width:640px;}
.cookie-banner a{font-weight:600;}
.cookie-actions{display:flex;gap:10px;flex-shrink:0;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  height:var(--header-h);
  background:color-mix(in srgb, var(--bg-alt) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:700;font-size:1.15rem;color:var(--text);flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;flex-shrink:0;
}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0;align-items:center;}
.main-nav > ul > li{position:relative;}
.nav-link{display:flex;align-items:center;gap:4px;padding:10px 12px;border-radius:8px;color:var(--text);font-weight:500;font-size:.94rem;white-space:nowrap;}
.nav-link:hover,.nav-link:focus-visible{background:var(--surface-2);color:var(--brand);}
.caret{width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-top:-3px;transition:transform .2s ease;}
.has-dropdown[aria-expanded="true"] .caret{transform:rotate(-135deg);margin-top:2px;}

.dropdown{
  position:absolute;
  top:100%;
  left:0;
  min-width:300px;
  max-height:70vh;
  overflow-y:auto;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
  padding:8px;
  display:grid;
  gap:2px;
  opacity:0;
  visibility:hidden;
  transform:translateY(4px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s;
  z-index:1100;
}
.has-dropdown[aria-expanded="true"] .dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.dropdown a{padding:9px 10px;border-radius:7px;color:var(--text);font-size:.88rem;}
.dropdown a:hover,.dropdown a:focus-visible{background:var(--brand-light);color:var(--brand);}

.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.theme-toggle{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  background:var(--surface);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background .2s ease;
}
.theme-toggle:hover{background:var(--surface-2);}
.theme-toggle svg{width:19px;height:19px;}
.theme-toggle .icon-sun{display:none;}
[data-theme="dark"] .theme-toggle .icon-moon{display:none;}
[data-theme="dark"] .theme-toggle .icon-sun{display:block;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:10px;font-weight:600;font-size:.92rem;
  border:1px solid transparent;cursor:pointer;transition:all .18s ease;font-family:var(--font-body);
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);}
.btn-primary:disabled{opacity:.6;cursor:not-allowed;}
.btn-outline{background:transparent;border-color:var(--border);color:var(--text);}
.btn-outline:hover{background:var(--surface-2);}
.btn-sm{padding:8px 14px;font-size:.85rem;}
.btn svg{width:16px;height:16px;flex-shrink:0;}

.hamburger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;}
.hamburger span{width:18px;height:2px;background:var(--text);border-radius:2px;transition:.25s;}
.hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar{background:var(--surface-2);border-bottom:1px solid var(--border);}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:10px 0;font-size:.85rem;color:var(--text-dim);list-style:none;margin:0;}
.breadcrumb li{display:flex;align-items:center;gap:6px;}
.breadcrumb a{color:var(--text-dim);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--text);font-weight:600;}

/* ---------- Hero ---------- */
.hero{padding:56px 0 40px;background:radial-gradient(1200px 500px at 50% -10%,var(--brand-light),transparent);}
.hero-inner{max-width:820px;margin:0 auto;text-align:center;}
.eyebrow{display:inline-flex;align-items:center;gap:6px;background:var(--brand-light);color:var(--brand);font-weight:600;font-size:.8rem;padding:6px 14px;border-radius:100px;margin-bottom:16px;}
.hero h1{font-size:clamp(1.8rem,4.2vw,2.7rem);}
.hero .lead{font-size:1.05rem;max-width:640px;margin:0 auto 8px;}
.trust-row{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-top:22px;font-size:.85rem;color:var(--text-dim);}
.trust-row span{display:flex;align-items:center;gap:6px;}
.trust-row svg{width:15px;height:15px;color:var(--accent);}

/* ---------- Scanner card ---------- */
.scanner-card{
  max-width:820px;margin:36px auto 0;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:28px;
}
.form-row{display:grid;grid-template-columns:1fr;gap:16px;}
@media(min-width:640px){.form-row.two-col{grid-template-columns:2fr 1fr;}}
.field{display:flex;flex-direction:column;gap:6px;text-align:left;}
.field label{font-weight:600;font-size:.85rem;color:var(--text);}
.field .hint{font-size:.76rem;color:var(--text-dim);}
.input,.select{
  width:100%;padding:12px 14px;border-radius:10px;border:1.5px solid var(--border);
  background:var(--bg-alt);color:var(--text);font-size:.95rem;font-family:var(--font-body);
  transition:border-color .18s ease, box-shadow .18s ease;
}
.input:focus,.select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-light);}
.input.invalid{border-color:var(--danger);}
.field-error{font-size:.78rem;color:var(--danger);min-height:16px;}
.checkbox-row{display:flex;align-items:center;gap:8px;margin-top:4px;font-size:.85rem;color:var(--text-dim);}
.checkbox-row input{width:16px;height:16px;accent-color:var(--brand);}

.preset-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px;}
.preset-chip{
  padding:7px 13px;border-radius:100px;border:1.5px solid var(--border);background:var(--surface-2);
  color:var(--text-dim);font-size:.8rem;font-weight:600;cursor:pointer;transition:.18s;
}
.preset-chip:hover{border-color:var(--brand);color:var(--brand);}
.preset-chip.active{background:var(--brand);border-color:var(--brand);color:#fff;}

.scan-actions{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap;}
.scan-actions .btn-primary{flex:1;min-width:200px;padding:14px 20px;font-size:1rem;}
.progress-wrap{margin-top:16px;display:none;}
.progress-wrap.active{display:block;}
.progress-bar{height:8px;border-radius:100px;background:var(--surface-2);overflow:hidden;}
.progress-bar-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .3s ease;border-radius:100px;}
.progress-label{font-size:.8rem;color:var(--text-dim);margin-top:6px;text-align:center;}

/* ---------- Share row ---------- */
.share-row{text-align:center;padding:36px 0 8px;}
.share-row h3{font-size:1.05rem;margin-bottom:14px;}
.share-icons{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;}
.share-icons a{
  width:42px;height:42px;border-radius:10px;background:var(--surface);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--text-dim);transition:.18s;
}
.share-icons a:hover{color:#fff;background:var(--brand);border-color:var(--brand);}
.share-icons svg{width:18px;height:18px;}

/* ---------- More tools strip ---------- */
.tools-strip{padding:40px 0;}
.tools-strip h2{text-align:center;font-size:1.4rem;}
.tools-strip .sub{text-align:center;max-width:560px;margin:0 auto 26px;}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px;}
.tool-pill{
  padding:12px 14px;border-radius:10px;background:var(--surface);border:1px solid var(--border);
  font-size:.83rem;font-weight:600;color:var(--text);transition:.18s;display:flex;align-items:center;gap:8px;
}
.tool-pill:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.tool-pill .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0;}

/* ---------- Results ---------- */
.results-section{padding:20px 0 64px;}
.results-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:0;overflow:hidden;display:none;
}
.results-card.active{display:block;}
.results-head{padding:22px 26px;border-bottom:1px solid var(--border);display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;}
.results-head h2{margin:0;font-size:1.2rem;}
.results-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:.82rem;color:var(--text-dim);margin-top:6px;}
.results-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1px;background:var(--border);}
.stat-box{background:var(--surface);padding:18px;text-align:center;}
.stat-box .num{font-family:var(--font-head);font-size:1.6rem;font-weight:700;}
.stat-box .lbl{font-size:.76rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em;}
.stat-open .num{color:var(--accent);}
.stat-closed .num{color:var(--danger);}

.results-toolbar{display:flex;gap:8px;flex-wrap:wrap;padding:16px 26px;border-bottom:1px solid var(--border);}

.table-wrap{overflow-x:auto;}
table.results-table{width:100%;border-collapse:collapse;font-size:.88rem;min-width:560px;}
.results-table th{text-align:left;padding:12px 16px;background:var(--surface-2);color:var(--text-dim);font-weight:600;font-size:.76rem;text-transform:uppercase;letter-spacing:.03em;position:sticky;top:0;}
.results-table td{padding:12px 16px;border-top:1px solid var(--border);vertical-align:middle;}
.status-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:100px;font-size:.76rem;font-weight:700;}
.status-pill.open{background:rgba(0,200,150,.14);color:var(--accent);}
.status-pill.closed{background:rgba(229,72,77,.12);color:var(--danger);}
.status-pill .dot{width:7px;height:7px;border-radius:50%;background:currentColor;}
.mono{font-family:'SFMono-Regular',Consolas,monospace;color:var(--text-dim);}

.security-note{margin:22px 26px 26px;padding:18px 20px;border-radius:var(--radius);background:var(--brand-light);border:1px solid var(--border);}
.security-note h3{font-size:.95rem;display:flex;align-items:center;gap:8px;}
.security-note ul{margin:8px 0 0;padding-left:20px;font-size:.86rem;color:var(--text-dim);}
.security-note li{margin-bottom:6px;}

.empty-state,.loading-state,.error-state{padding:50px 26px;text-align:center;color:var(--text-dim);}
.loading-state .spinner{width:34px;height:34px;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;margin:0 auto 14px;animation:spin .8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}
.error-state{color:var(--danger);}

/* ---------- Features ---------- */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:32px;}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:.2s;}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.feature-icon{width:42px;height:42px;border-radius:10px;background:var(--brand-light);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:12px;}
.feature-icon svg{width:22px;height:22px;}
.feature-card h3{font-size:1rem;}
.feature-card p{font-size:.87rem;margin:0;}
.section-head{text-align:center;max-width:640px;margin:0 auto;}
.section-head h2{font-size:1.7rem;}

/* ---------- How it works ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px;margin-top:32px;counter-reset:step;}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;position:relative;}
.step-num{width:32px;height:32px;border-radius:9px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--font-head);margin-bottom:12px;}
.step h3{font-size:.98rem;}
.step p{font-size:.86rem;margin:0;}

/* ---------- Article ---------- */
.article{max-width:820px;margin:0 auto;}
.article h2{font-size:1.6rem;}
.article p{font-size:.96rem;color:var(--text-dim);}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:32px auto 0;display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 20px;background:none;border:none;text-align:left;font-family:var(--font-head);font-weight:600;font-size:.96rem;color:var(--text);cursor:pointer;}
.faq-q .plus{width:20px;height:20px;flex-shrink:0;position:relative;}
.faq-q .plus::before,.faq-q .plus::after{content:'';position:absolute;background:var(--brand);border-radius:2px;transition:.25s;}
.faq-q .plus::before{width:14px;height:2px;top:9px;left:3px;}
.faq-q .plus::after{width:2px;height:14px;top:3px;left:9px;}
.faq-item.open .plus::after{transform:rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a-inner{padding:0 20px 18px;font-size:.88rem;color:var(--text-dim);}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(135deg,var(--brand),var(--brand-dark));border-radius:var(--radius-lg);padding:48px 32px;text-align:center;color:#fff;margin:0 20px;}
.cta h2{color:#fff;font-size:1.6rem;}
.cta p{color:rgba(255,255,255,.85);max-width:520px;margin:0 auto 22px;}
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
.cta .btn-outline{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.4);color:#fff;}
.cta .btn-outline:hover{background:rgba(255,255,255,.2);}
.cta .btn-primary{background:#fff;color:var(--brand-dark);}
.cta .btn-primary:hover{background:#f0f2ff;}

/* ---------- Footer ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:24px;}
@media(max-width:900px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr;}}
.footer-col h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-dim);margin-bottom:12px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}
.footer-col a{font-size:.86rem;color:var(--text-dim);}
.footer-col a:hover{color:var(--brand);}
.footer-brand p{font-size:.85rem;max-width:280px;}
.footer-bottom{border-top:1px solid var(--border);margin-top:36px;padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--text-dim);}
.footer-legal{display:flex;gap:16px;flex-wrap:wrap;}
.disclaimer{font-size:.76rem;color:var(--text-dim);max-width:900px;margin-top:14px;line-height:1.6;}

/* ---------- Toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:12px 20px;border-radius:10px;font-size:.86rem;font-weight:600;opacity:0;pointer-events:none;transition:.25s;z-index:1500;}
[data-theme="dark"] .toast{background:#eef0f7;color:#0c0f1a;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .main-nav{position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:var(--bg-alt);
    flex-direction:column;align-items:stretch;padding:14px;overflow-y:auto;
    transform:translateX(-100%);transition:transform .28s ease;z-index:999;border-top:1px solid var(--border);}
  .main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:stretch;width:100%;}
  .main-nav > ul{gap:2px;}
  .nav-link{padding:13px 12px;width:100%;justify-content:space-between;}
  .dropdown{position:static;box-shadow:none;border:none;background:var(--surface-2);opacity:1;visibility:visible;transform:none;max-height:0;padding:0;overflow:hidden;transition:max-height .25s ease;}
  .has-dropdown[aria-expanded="true"] .dropdown{max-height:1000px;padding:6px;}
  .hamburger{display:flex;}
  .header-actions .btn-outline.hide-mobile{display:none;}
}
@media(min-width:901px){.main-nav{display:flex !important;}}

@media(max-width:640px){
  section{padding:44px 0;}
  .scanner-card{padding:20px;}
  .cta{margin:0 12px;padding:36px 20px;}
  .results-head{flex-direction:column;align-items:flex-start;}
}

/* prevent any horizontal overflow globally */
.container,section,.hero,.results-card,.scanner-card{max-width:100%;}
body{max-width:100vw;}