/* ==========================================================================
   HTML → Markdown Converter — SEOWebChecker.com
   Design: split-pane "editor" identity — terminal chrome, mono accents
   ========================================================================== */

:root{
  --ink:#0F1620;
  --ink-soft:#151F2C;
  --paper:#F7F5F0;
  --paper-soft:#FFFFFF;
  --teal:#2DD4BF;
  --teal-deep:#14B8A6;
  --amber:#F5A524;
  --slate:#64748B;
  --slate-dark:#94A3B8;
  --border-light:#E4E1D8;
  --border-dark:#243244;
  --danger:#EF4444;
  --success:#22C55E;

  --font-display:'Outfit',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;

  --radius:10px;
  --radius-lg:16px;
  --shadow-soft:0 4px 24px rgba(15,22,32,0.08);
  --shadow-pop:0 12px 40px rgba(15,22,32,0.16);
  --transition:180ms cubic-bezier(.4,0,.2,1);

  color-scheme:light;
  --bg:var(--paper);
  --bg-elevated:var(--paper-soft);
  --text:#151B23;
  --text-dim:var(--slate);
  --border:var(--border-light);
  --panel-header:#EDEAE1;
}

[data-theme="dark"]{
  color-scheme:dark;
  --bg:var(--ink);
  --bg-elevated:var(--ink-soft);
  --text:#E9EEF3;
  --text-dim:var(--slate-dark);
  --border:var(--border-dark);
  --panel-header:#0B121B;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  transition:background var(--transition),color var(--transition);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-display);margin:0 0 .5em;line-height:1.15;}
p{line-height:1.7;color:var(--text-dim);}
button{font-family:inherit;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}

/* ---------- Cookie banner ---------- */
.cookie-banner{
  position:fixed;bottom:0;left:0;right:0;z-index:200;
  background:var(--ink);color:#F1F5F9;
  padding:16px 20px;display:none;gap:16px;
  align-items:center;justify-content:center;flex-wrap:wrap;
  box-shadow:0 -8px 30px rgba(0,0,0,.25);
}
.cookie-banner.show{display:flex;}
.cookie-banner p{color:#CBD5E1;margin:0;font-size:.9rem;max-width:640px;}
.cookie-banner a{color:var(--teal);text-decoration:underline;}
.cookie-actions{display:flex;gap:10px;flex-shrink:0;}
.btn-cookie{padding:9px 18px;border-radius:8px;border:1px solid transparent;cursor:pointer;font-size:.85rem;font-weight:600;}
.btn-cookie.accept{background:var(--teal);color:#04211D;}
.btn-cookie.dismiss{background:transparent;color:#CBD5E1;border-color:#334155;}

/* ---------- Top utility bar ---------- */
.topbar{background:var(--ink);color:#CBD5E1;font-size:.78rem;}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px;}
.topbar a{color:var(--teal);}
.topbar-links{display:flex;gap:16px;}
@media (max-width:640px){.topbar{display:none;}}

/* ---------- Header / Nav ---------- */
header.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--bg-elevated);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(8px);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.15rem;white-space:nowrap;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--teal),var(--teal-deep));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);color:#04211D;font-weight:800;font-size:.8rem;
}
nav.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:6px;
  padding:10px 14px;border-radius:8px;font-size:.92rem;font-weight:500;
  color:var(--text);cursor:pointer;background:none;border:none;
  transition:background var(--transition);
}
.nav-link:hover,.nav-link[aria-expanded="true"]{background:var(--panel-header);}
.chev{width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);transition:transform var(--transition);margin-top:-3px;}
.nav-link[aria-expanded="true"] .chev{transform:rotate(-135deg);margin-top:3px;}

.dropdown{
  position:absolute;
  top:100%;
  left:0;
  min-width:300px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-pop);
  padding:10px;
  display:none;
  flex-direction:column;
  gap:2px;
  z-index:150;
  max-height:70vh;
  overflow-y:auto;
}
.dropdown.open{display:flex;}
.dropdown a{
  padding:9px 12px;border-radius:7px;font-size:.87rem;color:var(--text);
  display:flex;align-items:center;gap:8px;
}
.dropdown a:hover{background:var(--panel-header);color:var(--teal-deep);}
.dropdown a::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--teal);flex-shrink:0;}

.header-actions{display:flex;align-items:center;gap:10px;}
.theme-toggle{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--border);
  background:var(--bg);cursor:pointer;display:flex;align-items:center;justify-content:center;
  font-size:1.05rem;transition:transform var(--transition);
}
.theme-toggle:active{transform:scale(.9);}
.hamburger{display:none;width:42px;height:42px;border-radius:8px;border:1px solid var(--border);background:var(--bg);cursor:pointer;flex-direction:column;gap:4px;align-items:center;justify-content:center;}
.hamburger span{width:20px;height:2px;background:var(--text);border-radius:2px;}

@media (max-width:960px){
  nav.main-nav{
    position:fixed;top:66px;left:0;right:0;bottom:0;
    background:var(--bg-elevated);
    flex-direction:column;align-items:stretch;
    padding:14px;overflow-y:auto;
    transform:translateX(100%);
    transition:transform var(--transition);
    border-top:1px solid var(--border);
  }
  nav.main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:stretch;width:100%;}
  .main-nav > ul > li{width:100%;}
  .dropdown{position:static;box-shadow:none;border:none;background:var(--panel-header);margin-top:2px;}
  .hamburger{display:flex;}
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{padding:14px 0;font-size:.83rem;color:var(--text-dim);}
.breadcrumb a{color:var(--teal-deep);}
.breadcrumb span{margin:0 6px;opacity:.5;}

/* ---------- Hero ---------- */
.hero{padding:36px 0 56px;position:relative;}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
  color:var(--teal-deep);background:rgba(45,212,191,.12);
  padding:6px 12px;border-radius:20px;margin-bottom:18px;
}
.hero h1{font-size:clamp(2rem,4vw,2.9rem);letter-spacing:-0.01em;}
.hero h1 .accent{color:var(--teal-deep);}
.hero p.lead{font-size:1.08rem;max-width:520px;}
.hero-stats{display:flex;gap:28px;margin-top:26px;flex-wrap:wrap;}
.hero-stat b{display:block;font-family:var(--font-mono);font-size:1.4rem;color:var(--teal-deep);}
.hero-stat span{font-size:.78rem;color:var(--text-dim);}

.hero-visual{
  background:var(--ink);border-radius:var(--radius-lg);
  padding:0;overflow:hidden;box-shadow:var(--shadow-pop);
  border:1px solid var(--border-dark);
}
.chrome-bar{display:flex;align-items:center;gap:8px;padding:12px 14px;background:#0B121B;border-bottom:1px solid #1E293B;}
.chrome-dot{width:10px;height:10px;border-radius:50%;}
.chrome-dot.r{background:#FF5F57;}
.chrome-dot.y{background:#FEBC2E;}
.chrome-dot.g{background:#28C840;}
.chrome-label{margin-left:auto;font-family:var(--font-mono);font-size:.7rem;color:#64748B;}
.chrome-code{padding:18px;font-family:var(--font-mono);font-size:.78rem;line-height:1.75;color:#94A3B8;}
.chrome-code .tag{color:#2DD4BF;}
.chrome-code .attr{color:#F5A524;}
.chrome-code .md{color:#E2E8F0;}
.blink-cursor{display:inline-block;width:7px;height:14px;background:var(--teal);animation:blink 1s step-end infinite;vertical-align:text-bottom;}
@keyframes blink{50%{opacity:0;}}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
}

/* ---------- Ticker of related tools ---------- */
.ticker-wrap{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-elevated);padding:14px 0;overflow:hidden;}
.ticker-label{font-family:var(--font-mono);font-size:.7rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;padding:0 20px;}
.ticker{display:flex;gap:10px;width:max-content;animation:scroll-x 42s linear infinite;}
.ticker-wrap:hover .ticker{animation-play-state:paused;}
.ticker a{
  flex-shrink:0;font-size:.8rem;padding:8px 14px;border-radius:20px;
  border:1px solid var(--border);background:var(--bg);color:var(--text-dim);
  font-family:var(--font-mono);white-space:nowrap;
}
.ticker a:hover{border-color:var(--teal);color:var(--teal-deep);}
@keyframes scroll-x{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@media (prefers-reduced-motion:reduce){.ticker{animation:none;overflow-x:auto;}}

/* ---------- Section shared ---------- */
section{padding:64px 0;}
.section-head{text-align:center;max-width:640px;margin:0 auto 40px;}
.section-head .eyebrow{margin-bottom:14px;}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);}

/* ---------- Features ---------- */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.feature-card{
  background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:transform var(--transition),box-shadow var(--transition);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-soft);}
.feature-icon{width:40px;height:40px;border-radius:10px;background:rgba(45,212,191,.14);color:var(--teal-deep);display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:14px;}
.feature-card h3{font-size:1.02rem;}
.feature-card p{font-size:.9rem;margin:0;}
@media (max-width:860px){.features-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.features-grid{grid-template-columns:1fr;}}

/* ---------- Converter tool ---------- */
.tool-section{background:var(--bg-elevated);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.tool-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:18px;}
.tool-toolbar .left-controls{display:flex;gap:10px;flex-wrap:wrap;}
.chip-btn{
  border:1px solid var(--border);background:var(--bg);color:var(--text);
  padding:8px 14px;border-radius:8px;font-size:.82rem;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;transition:border-color var(--transition),color var(--transition);
}
.chip-btn:hover{border-color:var(--teal);color:var(--teal-deep);}
.chip-btn.active{background:var(--teal);border-color:var(--teal);color:#04211D;font-weight:600;}

.editor-shell{
  background:var(--ink);border-radius:var(--radius-lg);
  border:1px solid var(--border-dark);overflow:hidden;box-shadow:var(--shadow-pop);
}
.editor-panes{display:grid;grid-template-columns:1fr 1fr;}
.pane{display:flex;flex-direction:column;min-height:420px;}
.pane + .pane{border-left:1px solid #1E293B;}
.pane-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 16px;background:#0B121B;border-bottom:1px solid #1E293B;
  font-family:var(--font-mono);font-size:.74rem;color:#94A3B8;
}
.pane-head .dots{display:flex;gap:6px;}
.pane-actions{display:flex;gap:8px;}
.icon-btn{
  background:none;border:1px solid #263447;color:#94A3B8;border-radius:6px;
  padding:5px 9px;font-size:.72rem;cursor:pointer;display:flex;align-items:center;gap:5px;
}
.icon-btn:hover{color:var(--teal);border-color:var(--teal);}
textarea.code-area{
  flex:1;resize:none;border:none;background:transparent;color:#E2E8F0;
  font-family:var(--font-mono);font-size:.84rem;line-height:1.65;padding:16px;
  outline:none;min-height:380px;
}
textarea.code-area::placeholder{color:#475569;}
.output-area{
  flex:1;padding:16px;font-family:var(--font-mono);font-size:.84rem;line-height:1.65;
  color:#E2E8F0;white-space:pre-wrap;word-break:break-word;overflow-y:auto;min-height:380px;
}
.output-area:empty::before{content:'Your Markdown output will appear here...';color:#475569;}

.dropzone{
  margin:0 16px 16px;border:1.5px dashed #334155;border-radius:10px;
  padding:14px;text-align:center;font-size:.8rem;color:#64748B;cursor:pointer;
  transition:border-color var(--transition),background var(--transition);
}
.dropzone.drag-over{border-color:var(--teal);background:rgba(45,212,191,.06);color:var(--teal);}

.tool-footer-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:18px;}
.validation-msg{font-size:.82rem;color:var(--danger);display:none;align-items:center;gap:6px;}
.validation-msg.show{display:flex;}
.char-counter{font-family:var(--font-mono);font-size:.76rem;color:var(--text-dim);}

.btn{
  border:none;border-radius:9px;padding:13px 26px;font-weight:600;font-size:.94rem;
  cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:transform var(--transition),opacity var(--transition),box-shadow var(--transition);
}
.btn-primary{background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#04211D;box-shadow:0 8px 24px rgba(45,212,191,.28);}
.btn-primary:hover:not(:disabled){transform:translateY(-2px);}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-secondary{background:var(--bg-elevated);color:var(--text);border:1px solid var(--border);}
.btn-secondary:hover{border-color:var(--teal);color:var(--teal-deep);}
.btn-amber{background:var(--amber);color:#3A2400;}

.options-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:16px;font-size:.85rem;}
.option-check{display:flex;align-items:center;gap:7px;}
.option-check input{accent-color:var(--teal);width:16px;height:16px;}

.spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(4,33,29,.35);border-top-color:#04211D;animation:spin .7s linear infinite;display:none;}
.btn-primary.loading .spinner{display:inline-block;}
.btn-primary.loading .btn-text{display:none;}
@keyframes spin{to{transform:rotate(360deg);}}

@media (max-width:820px){
  .editor-panes{grid-template-columns:1fr;}
  .pane + .pane{border-left:none;border-top:1px solid #1E293B;}
}

/* ---------- How it works ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
.step-card{position:relative;padding:22px 18px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);}
.step-num{font-family:var(--font-mono);font-size:.75rem;color:var(--teal-deep);margin-bottom:10px;}
.step-card h3{font-size:.98rem;}
.step-card p{font-size:.86rem;margin:0;}
@media (max-width:860px){.steps{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.steps{grid-template-columns:1fr;}}

/* ---------- Article ---------- */
.article-block{max-width:760px;margin:0 auto;}
.article-block p{font-size:.98rem;}

/* ---------- FAQ ---------- */
.faq-list{max-width:760px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:18px 4px;
  display:flex;justify-content:space-between;align-items:center;cursor:pointer;
  font-family:var(--font-display);font-weight:600;font-size:1rem;color:var(--text);
}
.faq-q .chev{margin-top:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--transition);}
.faq-item.open .faq-a{max-height:300px;}
.faq-a p{padding:0 4px 18px;font-size:.92rem;}
.faq-item.open .faq-q .chev{transform:rotate(-135deg);}

/* ---------- CTA ---------- */
.cta-section{background:var(--ink);color:#F1F5F9;text-align:center;border-radius:var(--radius-lg);margin:0 20px;padding:56px 24px;}
.cta-section h2{color:#fff;}
.cta-section p{color:#94A3B8;max-width:520px;margin:0 auto 26px;}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
@media (max-width:640px){.cta-section{margin:0;border-radius:0;}}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--bg-elevated);border-top:1px solid var(--border);margin-top:60px;padding:56px 0 0;font-size:.86rem;}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px;padding-bottom:40px;}
.footer-col h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-dim);margin-bottom:14px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.footer-col a{color:var(--text-dim);font-size:.85rem;}
.footer-col a:hover{color:var(--teal-deep);}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--text-dim);font-size:.8rem;}
.footer-bottom a{color:var(--text-dim);}
.footer-disclaimer{max-width:1180px;margin:0 auto;padding:0 20px 20px;font-size:.75rem;color:var(--text-dim);opacity:.8;}
@media (max-width:900px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}

/* ---------- Toast ---------- */
.toast{
  position:fixed;bottom:24px;right:24px;z-index:300;
  background:var(--ink);color:#fff;padding:13px 20px;border-radius:9px;
  font-size:.86rem;box-shadow:var(--shadow-pop);display:flex;align-items:center;gap:10px;
  transform:translateY(20px);opacity:0;pointer-events:none;transition:all var(--transition);
}
.toast.show{transform:translateY(0);opacity:1;}
.toast .dot{width:8px;height:8px;border-radius:50%;background:var(--success);}
@media (max-width:640px){.toast{left:16px;right:16px;bottom:80px;}}

/* Utility */
.text-center{text-align:center;}
.mt-24{margin-top:24px;}
.lazy-img{background:var(--panel-header);}