/* =========================================================
   SEOWebChecker · URL Extractor — Stylesheet
   Design language: "link graph" — nodes & edges, technical/dev tool feel
   ========================================================= */

:root{
  --ink:#0B1120;
  --surface:#121A2B;
  --surface-2:#1A2338;
  --border:#26314A;
  --text:#E7ECF7;
  --text-dim:#9AA7C2;
  --accent:#43D9C8;
  --accent-2:#7C9BFF;
  --warn:#F5A623;
  --danger:#FF6B6B;
  --ok:#4ADE80;
  --radius:12px;
  --radius-lg:20px;
  --shadow:0 20px 60px -30px rgba(0,0,0,.6);
  --font-display:'Outfit',sans-serif;
  --font-body:'Inter',sans-serif;
  --max:1180px;
}

[data-theme="light"]{
  --ink:#F6F7FB;
  --surface:#FFFFFF;
  --surface-2:#F0F2F9;
  --border:#DDE2EF;
  --text:#121A2B;
  --text-dim:#5A6478;
  --accent:#0FA99A;
  --accent-2:#4F63D2;
  --shadow:0 20px 60px -30px rgba(20,30,60,.25);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{max-width:100%;overflow-x:hidden;}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background .25s ease,color .25s ease;
}
h1,h2,h3,h4{font-family:var(--font-display);margin:0 0 .5em;letter-spacing:-0.01em;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.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(--accent);color:#04201d;padding:10px 16px;border-radius:0 0 8px 0;z-index:999;}
.skip-link:focus{left:0;}

/* ---------- Top utility / breadcrumb ---------- */
.breadcrumb-bar{background:var(--surface-2);border-bottom:1px solid var(--border);font-size:.82rem;}
.breadcrumb-bar ol{list-style:none;display:flex;gap:6px;margin:0;padding:9px 0;color:var(--text-dim);flex-wrap:wrap;}
.breadcrumb-bar li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--text-dim);}
.breadcrumb-bar a:hover{color:var(--accent);}
.breadcrumb-bar li[aria-current]{color:var(--text);}

/* ---------- Header / Nav ---------- */
header.site-header{
  position:sticky;top:0;z-index:100;
  background:color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.15rem;}
.brand .node-mark{width:30px;height:30px;flex:none;}
.brand small{display:block;font-family:var(--font-body);font-weight:400;font-size:.68rem;color:var(--text-dim);}

nav.primary-nav{display:flex;align-items:center;gap:22px;}
nav.primary-nav > ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;align-items:center;}
nav.primary-nav a{font-size:.94rem;color:var(--text-dim);}
nav.primary-nav a:hover{color:var(--text);}
.has-dropdown{position:relative;}
.dropdown{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%);
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:10px;display:grid;grid-template-columns:1fr 1fr;gap:2px;
  min-width:520px;opacity:0;visibility:hidden;translate:0 8px;transition:.18s ease;
}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown{opacity:1;visibility:visible;translate:0 0;}
.dropdown a{display:block;padding:8px 10px;border-radius:8px;font-size:.86rem;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.dropdown a:hover{background:var(--surface-2);color:var(--accent);}

.nav-actions{display:flex;align-items:center;gap:10px;}
.theme-toggle{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--border);
  background:var(--surface);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.theme-toggle svg{width:18px;height:18px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:11px 20px;border-radius:999px;border:1px solid transparent;font-weight:600;font-size:.92rem;cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#04201d;}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 24px -10px var(--accent);}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}

.hamburger{display:none;background:transparent;border:1px solid var(--border);border-radius:8px;width:42px;height:42px;color:var(--text);}

/* ---------- Hero ---------- */
.hero{position:relative;padding:64px 0 56px;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);background:color-mix(in srgb, var(--accent) 14%, transparent);border:1px solid color-mix(in srgb, var(--accent) 35%, transparent);padding:6px 12px;border-radius:999px;margin-bottom:18px;}
.hero h1{font-size:clamp(2.1rem,4.4vw,3.3rem);line-height:1.08;}
.hero h1 span{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.lede{color:var(--text-dim);font-size:1.08rem;max-width:52ch;margin:16px 0 26px;}
.hero-stats{display:flex;gap:26px;margin-top:30px;flex-wrap:wrap;}
.hero-stats div strong{display:block;font-family:var(--font-display);font-size:1.4rem;}
.hero-stats div span{color:var(--text-dim);font-size:.8rem;}

.graph-visual{position:relative;aspect-ratio:1/1;max-width:440px;margin-left:auto;}
.graph-visual svg{width:100%;height:100%;}
.graph-visual .edge{stroke:var(--border);stroke-width:1.4;}
.graph-visual .edge.active{stroke:var(--accent);}
.graph-visual .node{fill:var(--surface);stroke:var(--border);stroke-width:1.4;}
.graph-visual .node.root{fill:var(--accent);stroke:none;}
.graph-visual .node.hit{fill:var(--accent-2);stroke:none;}
.graph-visual text{font-family:var(--font-body);font-size:9px;fill:var(--text-dim);}

/* ---------- Tool panel ---------- */
.tool-section{padding:10px 0 60px;}
.tool-panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:6px;
}
.mode-tabs{display:flex;gap:6px;padding:10px;flex-wrap:wrap;}
.mode-tab{
  flex:1;min-width:150px;padding:14px 16px;border-radius:10px;border:1px solid transparent;
  background:transparent;color:var(--text-dim);cursor:pointer;text-align:left;font-weight:600;
}
.mode-tab strong{display:block;font-family:var(--font-display);font-size:.98rem;color:var(--text);}
.mode-tab span{font-size:.78rem;font-weight:400;}
.mode-tab[aria-selected="true"]{background:var(--surface-2);border-color:var(--accent);}
.mode-tab[aria-selected="true"] strong{color:var(--accent);}

.tool-body{padding:22px 24px 26px;border-top:1px solid var(--border);}
.tool-mode-panel{display:none;}
.tool-mode-panel.active{display:block;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:.86rem;font-weight:600;margin-bottom:6px;}
.field .hint{font-size:.78rem;color:var(--text-dim);margin-top:6px;}
.field textarea,.field input[type=text],.field input[type=url],.field input[type=number]{
  width:100%;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;
  padding:12px 14px;color:var(--text);font-size:.94rem;font-family:var(--font-body);
}
.field textarea{min-height:120px;resize:vertical;font-family:'SFMono-Regular',Consolas,monospace;font-size:.86rem;}
.field textarea:focus,.field input:focus{outline:none;border-color:var(--accent);}
.field.error input,.field.error textarea{border-color:var(--danger);}
.field-error-msg{color:var(--danger);font-size:.78rem;margin-top:6px;display:none;}
.field.error .field-error-msg{display:block;}

.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:18px 0;}
.option-card{
  display:flex;gap:10px;align-items:flex-start;background:var(--surface-2);border:1px solid var(--border);
  border-radius:10px;padding:12px 14px;cursor:pointer;
}
.option-card input{margin-top:3px;accent-color:var(--accent);}
.option-card strong{display:block;font-size:.88rem;}
.option-card small{color:var(--text-dim);font-size:.76rem;}

.crawl-extra{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;}

.tool-actions{display:flex;align-items:center;gap:14px;margin-top:18px;flex-wrap:wrap;}
.submit-note{font-size:.8rem;color:var(--text-dim);}

.progress-wrap{margin-top:16px;display:none;}
.progress-wrap.active{display:block;}
.progress-bar{height:8px;border-radius:999px;background:var(--surface-2);overflow:hidden;border:1px solid var(--border);}
.progress-bar > i{display:block;height:100%;width:8%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .3s ease;}
.progress-text{font-size:.8rem;color:var(--text-dim);margin-top:6px;}

/* ---------- Results ---------- */
.results-section{padding:10px 0 70px;}
.results-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);display:none;}
.results-panel.active{display:block;}
.results-head{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:12px;}
.results-head h2{font-size:1.2rem;margin:0;}
.results-head .count-pill{background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:.8rem;color:var(--accent);margin-left:8px;}
.results-toolbar{display:flex;flex-wrap:wrap;gap:8px;padding:14px 24px;border-bottom:1px solid var(--border);}
.results-toolbar .btn{padding:9px 14px;font-size:.82rem;}
.table-wrap{overflow-x:auto;}
table.results-table{width:100%;border-collapse:collapse;font-size:.86rem;min-width:640px;}
table.results-table th{text-align:left;padding:12px 16px;background:var(--surface-2);color:var(--text-dim);font-weight:600;position:sticky;top:0;white-space:nowrap;}
table.results-table td{padding:10px 16px;border-top:1px solid var(--border);vertical-align:top;word-break:break-word;}
table.results-table tr:hover td{background:var(--surface-2);}
.url-cell{display:flex;align-items:center;gap:8px;}
.url-cell a{color:var(--accent-2);}
.copy-row{background:transparent;border:1px solid var(--border);border-radius:6px;width:26px;height:26px;color:var(--text-dim);cursor:pointer;flex:none;}
.copy-row:hover{color:var(--accent);border-color:var(--accent);}
.status-pill{padding:2px 9px;border-radius:999px;font-size:.74rem;font-weight:700;}
.status-2xx{background:color-mix(in srgb, var(--ok) 18%, transparent);color:var(--ok);}
.status-3xx{background:color-mix(in srgb, var(--warn) 18%, transparent);color:var(--warn);}
.status-4xx,.status-5xx,.status-err{background:color-mix(in srgb, var(--danger) 18%, transparent);color:var(--danger);}
.empty-note{padding:40px 24px;text-align:center;color:var(--text-dim);}

.post-actions{display:flex;flex-wrap:wrap;gap:10px;padding:18px 24px;border-top:1px solid var(--border);}

/* ---------- Sections generic ---------- */
section{padding:70px 0;}
.section-head{max-width:620px;margin:0 auto 40px;text-align:center;}
.section-head .eyebrow{margin:0 auto 14px;}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);}
.section-head p{color:var(--text-dim);}

.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;}
.feature-card .ic{width:38px;height:38px;border-radius:10px;background:color-mix(in srgb, var(--accent) 16%, transparent);display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--accent);}
.feature-card h3{font-size:1.02rem;}
.feature-card p{color:var(--text-dim);font-size:.88rem;margin:0;}

.steps{counter-reset:step;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;}
.step-card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px 22px;}
.step-card::before{counter-increment:step;content:counter(step);font-family:var(--font-display);font-size:.8rem;color:var(--ink);background:var(--accent);width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:14px;}
.step-card h3{font-size:1rem;}
.step-card p{color:var(--text-dim);font-size:.86rem;margin:0;}

.article-block{max-width:800px;margin:0 auto;color:var(--text-dim);font-size:.96rem;}
.article-block h2{color:var(--text);}
.article-block p{margin:0 0 16px;}

.faq-list{max-width:760px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 4px;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-family:var(--font-display);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:1.3rem;color:var(--accent);}
.faq-item[open] summary::after{content:"−";}
.faq-item p{color:var(--text-dim);padding:0 4px 18px;margin:0;}

.cta-band{background:linear-gradient(135deg,var(--surface),var(--surface-2));border:1px solid var(--border);border-radius:var(--radius-lg);padding:44px 34px;text-align:center;}
.cta-band h2{font-size:clamp(1.4rem,3vw,2rem);}
.cta-band p{color:var(--text-dim);max-width:520px;margin:0 auto 24px;}
.cta-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}

.related-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;}
.related-links a{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px 14px;font-size:.85rem;color:var(--text-dim);}
.related-links a:hover{color:var(--accent);border-color:var(--accent);}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:50px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:24px;margin-bottom:34px;}
.footer-col h4{font-size:.86rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-dim);margin-bottom:14px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.footer-col a{font-size:.85rem;color:var(--text-dim);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.8rem;color:var(--text-dim);}
.footer-bottom a{color:var(--text-dim);}
.footer-bottom a:hover{color:var(--accent);}
.disclaimer{font-size:.76rem;color:var(--text-dim);max-width:900px;margin:16px 0 0;}

/* ---------- Toast / feedback / cookie ---------- */
.toast{position:fixed;bottom:24px;left:50%;translate:-50% 0;background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:12px 18px;border-radius:10px;font-size:.86rem;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s ease;z-index:400;}
.toast.show{opacity:1;translate:-50% -8px;}

.cookie-bar{position:fixed;left:16px;right:16px;bottom:16px;max-width:640px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px;z-index:500;display:none;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;}
.cookie-bar.show{display:flex;}
.cookie-bar p{margin:0;font-size:.84rem;color:var(--text-dim);flex:1;min-width:220px;}
.cookie-bar .cookie-actions{display:flex;gap:8px;}

/* ---------- Feedback modal ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(4,8,18,.6);display:none;align-items:center;justify-content:center;z-index:600;padding:20px;}
.modal-overlay.show{display:flex;}
.modal-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;max-width:420px;width:100%;}
.modal-box h3{margin-bottom:8px;}
.modal-box p{color:var(--text-dim);font-size:.88rem;margin-bottom:18px;}
.modal-box .btn{width:100%;}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;}
  .graph-visual{margin:0 auto;max-width:320px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  nav.primary-nav{position:fixed;inset:64px 0 0 0;background:var(--ink);flex-direction:column;align-items:flex-start;padding:20px;transform:translateX(100%);transition:transform .25s ease;overflow-y:auto;border-top:1px solid var(--border);}
  nav.primary-nav.open{transform:translateX(0);}
  nav.primary-nav > ul{flex-direction:column;align-items:flex-start;width:100%;gap:4px;}
  .dropdown{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;min-width:0;grid-template-columns:1fr;display:none;border:none;padding:4px 0 4px 12px;}
  .has-dropdown.open .dropdown{display:grid;}
  .hamburger{display:flex;align-items:center;justify-content:center;}
  .nav-actions .btn-ghost span{display:none;}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;}
  .mode-tabs{flex-direction:column;}
  .results-head{flex-direction:column;align-items:flex-start;}
  table.results-table{min-width:520px;}
}