/* =========================================================
   Instagram Username Availability Checker - SEOWebChecker.com
   ========================================================= */

:root{
  --font-body:'Inter',sans-serif;
  --font-heading:'Outfit',sans-serif;

  --bg:#ffffff;
  --bg-alt:#f7f8fb;
  --bg-card:#ffffff;
  --text:#181a2a;
  --text-muted:#5b5f74;
  --border:#e6e8f0;
  --shadow:0 8px 30px rgba(20,20,40,.07);

  --brand1:#833ab4;
  --brand2:#fd1d1d;
  --brand3:#fcb045;
  --gradient:linear-gradient(135deg,var(--brand1) 0%,var(--brand2) 55%,var(--brand3) 100%);

  --success:#12b76a;
  --success-bg:#e6f9f0;
  --danger:#f04438;
  --danger-bg:#fdecea;
  --warn:#f79009;
  --warn-bg:#fff4e0;

  --radius:14px;
  --radius-sm:8px;
  --nav-h:72px;
}

[data-theme="dark"]{
  --bg:#0f1117;
  --bg-alt:#161925;
  --bg-card:#1a1d2b;
  --text:#f2f3f7;
  --text-muted:#a2a6b8;
  --border:#2a2e40;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --success-bg:#0e2b21;
  --danger-bg:#331a1a;
  --warn-bg:#332310;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  overflow-x:hidden;
  transition:background .25s ease,color .25s ease;
  -webkit-text-size-adjust:100%;
}
h1,h2,h3,h4{font-family:var(--font-heading);margin:0 0 .5rem;line-height:1.2;}
p{margin:0 0 1rem;color:var(--text-muted);}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:none;font-weight:600;font-size:.95rem;
  transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 6px 18px rgba(131,58,180,.35);}
.btn-primary:hover{box-shadow:0 8px 24px rgba(131,58,180,.5);}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text);}
.btn-outline:hover{border-color:var(--brand1);color:var(--brand1);}
.btn-sm{padding:8px 16px;font-size:.85rem;}
.btn:disabled{opacity:.6;cursor:not-allowed;}

/* ---------- Top utility bar ---------- */
.topbar{
  background:var(--bg-alt);
  border-bottom:1px solid var(--border);
  font-size:.78rem;
  color:var(--text-muted);
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px;}
.topbar-links{display:flex;gap:16px;}
.topbar-links a:hover{color:var(--brand1);}

/* ---------- Navbar ---------- */
.navbar{
  position:sticky;top:0;z-index:1000;
  background:var(--bg);
  border-bottom:1px solid var(--border);
  height:var(--nav-h);
}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:100%;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-heading);font-weight:800;font-size:1.2rem;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:var(--gradient);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0;
}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;height:100%;}
.nav-links > li{position:relative;height:100%;display:flex;align-items:center;}
.nav-links > li > a, .nav-links > li > button.nav-toplink{
  display:flex;align-items:center;gap:5px;padding:10px 14px;border-radius:var(--radius-sm);
  font-weight:600;font-size:.92rem;background:none;border:none;color:var(--text);
}
.nav-links > li > a:hover,.nav-links > li > button.nav-toplink:hover,
.nav-links > li.open > button.nav-toplink{background:var(--bg-alt);color:var(--brand1);}
.chevron{transition:transform .2s ease;font-size:.7rem;}
.nav-links > li.open .chevron{transform:rotate(180deg);}

.mega-menu{
  position:absolute;
  top:100%;
  left:50%;
  transform:translateX(-50%);
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
  display:none;
  grid-template-columns:repeat(2,220px);
  gap:6px 24px;
  min-width:460px;
  z-index:1001;
}
.nav-links > li.open .mega-menu{display:grid;}
.mega-menu a{
  padding:8px 10px;border-radius:8px;font-size:.88rem;color:var(--text-muted);font-weight:500;
}
.mega-menu a:hover{background:var(--bg-alt);color:var(--brand1);}

.nav-right{display:flex;align-items:center;gap:10px;}
.theme-toggle{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:var(--bg-alt);
  display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--text);
}
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-alt);align-items:center;justify-content:center;flex-direction:column;gap:4px;}
.hamburger span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:.2s;}

/* ---------- Mobile Nav ---------- */
@media (max-width:960px){
  .nav-links{display:none;position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;
    background:var(--bg);flex-direction:column;align-items:stretch;overflow-y:auto;
    padding:10px 16px 40px;height:calc(100vh - var(--nav-h));z-index:999;}
  .nav-links.mobile-open{display:flex;}
  .nav-links > li{height:auto;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--border);}
  .nav-links > li > a, .nav-links > li > button.nav-toplink{width:100%;justify-content:space-between;padding:14px 6px;}
  .mega-menu{position:static;transform:none;box-shadow:none;border:none;grid-template-columns:1fr;min-width:0;padding:0 0 10px 10px;width:100%;}
  .hamburger{display:flex;}
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{padding:14px 0;font-size:.85rem;color:var(--text-muted);background:var(--bg-alt);border-bottom:1px solid var(--border);}
.breadcrumb a:hover{color:var(--brand1);}
.breadcrumb .sep{margin:0 6px;opacity:.6;}
.breadcrumb .current{color:var(--text);font-weight:600;}

/* ---------- Hero ---------- */
.hero{
  padding:64px 0 56px;
  background:
    radial-gradient(circle at 15% 20%, rgba(131,58,180,.12), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(253,29,29,.10), transparent 40%),
    var(--bg);
  text-align:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:999px;
  background:var(--bg-alt);border:1px solid var(--border);font-size:.8rem;font-weight:600;
  color:var(--brand1);margin-bottom:20px;
}
.hero h1{font-size:clamp(1.8rem,4vw,2.9rem);max-width:780px;margin:0 auto .8rem;}
.hero h1 span{background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{max-width:640px;margin:0 auto 30px;font-size:1.05rem;}
.hero-stats{display:flex;flex-wrap:wrap;justify-content:center;gap:28px;margin-top:36px;}
.hero-stat{text-align:center;}
.hero-stat b{display:block;font-family:var(--font-heading);font-size:1.5rem;color:var(--brand1);}
.hero-stat span{font-size:.82rem;color:var(--text-muted);}

/* ---------- Checker Card ---------- */
.checker-wrap{max-width:820px;margin:0 auto;padding:0 20px;margin-top:-10px;}
.checker-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:28px;text-align:left;
}
.checker-tabs{display:flex;gap:8px;margin-bottom:18px;border-bottom:1px solid var(--border);}
.checker-tab{
  padding:10px 6px;background:none;border:none;font-weight:600;color:var(--text-muted);
  border-bottom:2px solid transparent;font-size:.92rem;
}
.checker-tab.active{color:var(--brand1);border-color:var(--brand1);}

.tab-panel{display:none;}
.tab-panel.active{display:block;}

label.field-label{display:block;font-weight:600;font-size:.9rem;margin-bottom:8px;}
.input-single{position:relative;}
.input-single .at{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-weight:600;}
input[type="text"], textarea{
  width:100%;background:var(--bg-alt);border:1.5px solid var(--border);border-radius:var(--radius-sm);
  padding:13px 14px;font-size:.98rem;color:var(--text);font-family:inherit;transition:border-color .15s ease;
}
.input-single input{padding-left:30px;}
textarea{resize:vertical;min-height:130px;line-height:1.5;}
input:focus,textarea:focus{outline:none;border-color:var(--brand1);}
input.invalid,textarea.invalid{border-color:var(--danger);}
.field-hint{font-size:.8rem;color:var(--text-muted);margin-top:6px;}
.field-error{font-size:.8rem;color:var(--danger);margin-top:6px;display:none;}
.field-error.show{display:block;}
.char-count{font-size:.78rem;color:var(--text-muted);text-align:right;margin-top:4px;}

.checker-actions{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap;}
.checker-actions .btn{flex:1;min-width:180px;}

.form-security-note{display:flex;align-items:center;gap:8px;font-size:.78rem;color:var(--text-muted);margin-top:14px;}

/* ---------- Results ---------- */
.results-section{padding:50px 0 20px;scroll-margin-top:90px;}
.results-section.hidden{display:none;}
.results-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:20px;}
.results-summary{display:flex;gap:10px;flex-wrap:wrap;}
.pill{padding:6px 14px;border-radius:999px;font-size:.82rem;font-weight:600;}
.pill.available{background:var(--success-bg);color:var(--success);}
.pill.taken{background:var(--danger-bg);color:var(--danger);}
.pill.invalid,.pill.unknown,.pill.error{background:var(--warn-bg);color:var(--warn);}

.results-toolbar{display:flex;gap:10px;flex-wrap:wrap;}

.result-list{display:flex;flex-direction:column;gap:10px;margin-top:10px;}
.result-item{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:14px 16px;flex-wrap:wrap;
}
.result-user{display:flex;align-items:center;gap:12px;font-weight:600;word-break:break-all;}
.status-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;}
.status-dot.available{background:var(--success);}
.status-dot.taken{background:var(--danger);}
.status-dot.invalid,.status-dot.unknown,.status-dot.error{background:var(--warn);}
.result-status{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.result-msg{font-size:.85rem;color:var(--text-muted);}
.result-badge{padding:5px 12px;border-radius:999px;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em;}
.result-badge.available{background:var(--success-bg);color:var(--success);}
.result-badge.taken{background:var(--danger-bg);color:var(--danger);}
.result-badge.invalid,.result-badge.unknown,.result-badge.error{background:var(--warn-bg);color:var(--warn);}

.loader{display:none;align-items:center;gap:12px;justify-content:center;padding:30px 0;color:var(--text-muted);}
.loader.show{display:flex;}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--brand1);animation:spin 0.8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

.progress-bar-wrap{height:6px;background:var(--bg-alt);border-radius:999px;overflow:hidden;margin-top:14px;display:none;}
.progress-bar-wrap.show{display:block;}
.progress-bar{height:100%;width:0%;background:var(--gradient);transition:width .25s ease;}

.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--text);color:var(--bg);padding:12px 20px;border-radius:999px;font-size:.88rem;font-weight:600;
  opacity:0;pointer-events:none;transition:.25s ease;z-index:3000;box-shadow:var(--shadow);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ---------- Reference links strip ---------- */
.refs-strip{padding:34px 0;background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.refs-strip h3{font-size:1rem;text-align:center;margin-bottom:16px;}
.refs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px 20px;font-size:.85rem;}
.refs-grid a{color:var(--text-muted);}
.refs-grid a:hover{color:var(--brand1);}

/* ---------- Share + Feedback ---------- */
.action-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;padding:34px 0;}
.share-menu-wrap{position:relative;}
.share-menu{
  position:absolute;bottom:calc(100% + 10px);left:50%;transform:translateX(-50%);
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);
  box-shadow:var(--shadow);padding:8px;display:none;flex-direction:column;gap:2px;min-width:180px;z-index:200;
}
.share-menu.show{display:flex;}
.share-menu button, .share-menu a{
  display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:6px;background:none;border:none;
  font-size:.88rem;color:var(--text);text-align:left;width:100%;
}
.share-menu button:hover, .share-menu a:hover{background:var(--bg-alt);}

/* ---------- Sections generic ---------- */
.section{padding:64px 0;}
.section-head{text-align:center;max-width:640px;margin:0 auto 40px;}
.section-head h2{font-size:clamp(1.5rem,3vw,2rem);}
.eyebrow{color:var(--brand1);font-weight:700;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:10px;}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .2s ease,box-shadow .2s ease;}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.feature-icon{width:46px;height:46px;border-radius:12px;background:var(--gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;margin-bottom:14px;}
.feature-card h3{font-size:1.05rem;}
.feature-card p{font-size:.9rem;margin:0;}

/* How it works */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;counter-reset:step;}
.step{position:relative;padding:26px 20px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);}
.step::before{
  counter-increment:step;content:counter(step);
  position:absolute;top:-16px;left:20px;width:34px;height:34px;border-radius:50%;
  background:var(--gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--font-heading);
}
.step h3{font-size:1rem;margin-top:8px;}
.step p{font-size:.88rem;margin:0;}

/* FAQ */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;}
.faq-question{
  width:100%;text-align:left;padding:16px 18px;background:none;border:none;
  display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;color:var(--text);
}
.faq-icon{transition:transform .2s ease;flex-shrink:0;margin-left:12px;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 18px;}
.faq-item.open .faq-answer{max-height:300px;padding-bottom:16px;}
.faq-answer p{font-size:.9rem;margin:0;}

/* Article */
.article-block{max-width:820px;margin:0 auto;}
.article-block h2{font-size:1.4rem;}
.article-block p{font-size:.95rem;line-height:1.75;}

/* CTA */
.cta{background:var(--gradient);border-radius:var(--radius);padding:48px 30px;text-align:center;color:#fff;}
.cta h2{color:#fff;}
.cta p{color:rgba(255,255,255,.9);max-width:560px;margin:0 auto 24px;}
.cta-buttons{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.cta .btn-outline{border-color:rgba(255,255,255,.6);color:#fff;}
.cta .btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff;}
.cta .btn-primary{background:#fff;color:var(--brand1);box-shadow:none;}

/* Footer */
footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:50px 0 20px;font-size:.87rem;}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:26px;margin-bottom:30px;}
.footer-col h4{font-size:.88rem;margin-bottom:14px;}
.footer-col a{display:block;color:var(--text-muted);padding:4px 0;}
.footer-col a:hover{color:var(--brand1);}
.footer-about p{font-size:.85rem;}
.footer-social{display:flex;gap:10px;margin-top:10px;}
.footer-social a{width:34px;height:34px;border-radius:50%;background:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--text-muted);font-size:.82rem;}
.footer-bottom .links{display:flex;gap:16px;flex-wrap:wrap;}
.disclaimer{font-size:.78rem;color:var(--text-muted);max-width:900px;margin:0 auto 20px;text-align:center;line-height:1.6;}

@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .checker-actions .btn{min-width:100%;}
  .results-toolbar{width:100%;}
  .results-toolbar .btn{flex:1;}
}

/* ---------- Cookie banner ---------- */
.cookie-banner{
  position:fixed;left:16px;right:16px;bottom:16px;max-width:640px;margin:0 auto;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px 20px;z-index:4000;display:none;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;
}
.cookie-banner.show{display:flex;}
.cookie-banner p{margin:0;font-size:.85rem;flex:1;min-width:220px;}
.cookie-actions{display:flex;gap:10px;}

/* Utility */
.mt-0{margin-top:0;}
::selection{background:var(--brand1);color:#fff;}