/* ===== Design tokens ===== */
:root{
  --navy-950:#070b16;
  --navy-900:#0b1120;
  --navy-800:#111a2e;
  --navy-700:#182541;
  --navy-600:#22335a;
  --border:#233255;
  --text-primary:#eef2fb;
  --text-secondary:#a9b4cc;
  --text-muted:#7481a0;
  --accent:#4f8cff;
  --accent-2:#7c5cff;
  --accent-soft:rgba(79,140,255,.12);
  --success:#39d98a;
  --danger:#ff6b6b;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.55);
  --font-display:'Outfit',sans-serif;
  --font-body:'Inter',sans-serif;
  --header-h:72px;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --navy-950:#f5f7fc;
  --navy-900:#ffffff;
  --navy-800:#f0f3fa;
  --navy-700:#e6eaf5;
  --navy-600:#dbe1f0;
  --border:#dde3f0;
  --text-primary:#111a2e;
  --text-secondary:#4a5578;
  --text-muted:#7481a0;
  --accent-soft:rgba(79,140,255,.1);
  --shadow:0 20px 50px -25px rgba(20,30,60,.25);
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.001ms !important;transition-duration:.001ms !important}}

body{
  margin:0;
  background:var(--navy-950);
  color:var(--text-primary);
  font-family:var(--font-body);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text-primary);margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
p{color:var(--text-secondary);margin:0 0 1em}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}

.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:.6em 1em;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.section-inner{max-width:1180px;margin:0 auto;padding:0 24px}
.section-inner.narrow{max-width:840px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:color-mix(in srgb, var(--navy-900) 88%, transparent);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  max-width:1280px;margin:0 auto;padding:0 24px;
  height:var(--header-h);
  display:flex;align-items:center;gap:32px;
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.05rem;white-space:nowrap}
.brand-mark{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;width:34px;height:34px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;font-size:.72rem;letter-spacing:.02em;
}
.brand-dot{color:var(--text-muted);font-weight:500}

.main-nav{flex:1}
.main-nav > ul{display:flex;align-items:center;gap:6px}
.main-nav > ul > li > a,.mega-trigger{
  display:flex;align-items:center;gap:6px;
  padding:10px 14px;border-radius:10px;
  color:var(--text-secondary);font-weight:500;font-size:.93rem;
  background:none;border:none;
}
.main-nav > ul > li > a:hover,.mega-trigger:hover{color:var(--text-primary);background:var(--navy-800)}
.has-mega{position:relative}
.chev{transition:transform .2s ease}
.has-mega:hover .chev,.has-mega.open .chev{transform:rotate(180deg)}

.mega-menu{
  position:absolute;top:100%;left:0;
  display:grid;grid-template-columns:repeat(3,220px);gap:4px;
  background:var(--navy-800);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:14px;box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
  margin-top:8px;
}
.has-mega:hover .mega-menu,.has-mega:focus-within .mega-menu{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col{display:flex;flex-direction:column;gap:2px}
.mega-col a{padding:8px 10px;border-radius:8px;font-size:.87rem;color:var(--text-secondary)}
.mega-col a:hover{background:var(--navy-700);color:var(--text-primary)}

.header-actions{display:flex;align-items:center;gap:10px}
.theme-toggle{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--border);
  background:var(--navy-800);color:var(--text-secondary);
  display:flex;align-items:center;justify-content:center;
}
.theme-toggle:hover{color:var(--text-primary)}
.icon-moon{display:none}
:root[data-theme="light"] .icon-sun{display:none}
:root[data-theme="light"] .icon-moon{display:block}

.hamburger{display:none;width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:var(--navy-800);flex-direction:column;align-items:center;justify-content:center;gap:4px}
.hamburger span{width:18px;height:2px;background:var(--text-secondary);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.hamburger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-nav{display:none;flex-direction:column;padding:10px 20px 20px;border-top:1px solid var(--border);background:var(--navy-900)}
.mobile-nav a,.mobile-accordion{
  padding:12px 4px;border:none;background:none;color:var(--text-secondary);
  font-size:.95rem;text-align:left;display:flex;justify-content:space-between;align-items:center;width:100%;
  border-bottom:1px solid var(--border);
}
.mobile-submenu{display:none;flex-direction:column;padding-left:12px}
.mobile-submenu.open{display:flex}
.mobile-submenu a{border-bottom:none;padding:9px 4px;font-size:.88rem;color:var(--text-muted)}

@media (max-width:920px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .mobile-nav.open{display:flex}
}

/* ===== Breadcrumb ===== */
.breadcrumb{border-bottom:1px solid var(--border);background:var(--navy-900)}
.breadcrumb-inner{max-width:1180px;margin:0 auto;padding:12px 24px;display:flex;gap:8px;align-items:center;font-size:.83rem;color:var(--text-muted);flex-wrap:wrap}
.breadcrumb-inner a{color:var(--text-muted)}
.breadcrumb-inner a:hover{color:var(--accent)}
.breadcrumb-inner [aria-current]{color:var(--text-secondary)}

/* ===== Hero ===== */
.hero{
  padding:88px 24px 64px;
  background:
    radial-gradient(700px 340px at 15% -10%, var(--accent-soft), transparent 60%),
    radial-gradient(600px 320px at 90% 0%, rgba(124,92,255,.12), transparent 60%);
  text-align:center;
}
.hero-inner{max-width:760px;margin:0 auto}
.eyebrow{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:var(--navy-800);border:1px solid var(--border);
  color:var(--text-muted);font-size:.78rem;letter-spacing:.02em;margin-bottom:22px;
}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.08;margin-bottom:20px}
.hero h1 .accent{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.08rem;max-width:600px;margin:0 auto 32px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.hero-stats{display:flex;gap:36px;justify-content:center;flex-wrap:wrap}
.hero-stats > div{display:flex;flex-direction:column;gap:2px}
.hero-stats strong{font-family:var(--font-display);font-size:1.5rem}
.hero-stats span{color:var(--text-muted);font-size:.82rem}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:11px;font-weight:600;font-size:.95rem;
  border:1px solid transparent;transition:transform .15s ease,opacity .15s ease,background .15s ease;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.btn-primary:hover{opacity:.92}
.btn-primary:disabled{opacity:.45;cursor:not-allowed}
.btn-secondary{background:var(--navy-800);color:var(--text-primary);border-color:var(--border)}
.btn-secondary:hover{background:var(--navy-700)}
.btn-ghost{background:transparent;color:var(--text-secondary);border-color:var(--border)}
.btn-ghost:hover{color:var(--text-primary);border-color:var(--accent)}
.btn-sm{padding:9px 16px;font-size:.85rem}
.link-btn{background:none;border:none;color:var(--accent);font-size:.85rem;font-weight:600}

/* ===== Renamer app ===== */
.renamer-section{padding:64px 0 20px}
.renamer-section h2,.results-section h2,.features h2,.how-it-works h2,.seo-copy h2,.faq h2,.cta h2{text-align:center;font-size:clamp(1.5rem,3vw,2rem)}
.section-lede{text-align:center;color:var(--text-muted);margin-bottom:36px}

.app-shell{
  background:var(--navy-900);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);
}
.dropzone{
  border:2px dashed var(--border);border-radius:var(--radius-md);
  padding:44px 24px;text-align:center;color:var(--text-secondary);
  cursor:pointer;transition:border-color .2s ease,background .2s ease;
}
.dropzone svg{margin:0 auto 12px;color:var(--accent)}
.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:var(--accent-soft)}
.dropzone p{margin:0 0 4px;color:var(--text-primary)}
.dropzone-hint{font-size:.82rem;color:var(--text-muted)}

.file-count-row{display:flex;justify-content:space-between;align-items:center;margin-top:16px;font-size:.88rem;color:var(--text-secondary)}

.rules-form{margin-top:28px;display:flex;flex-direction:column;gap:20px}
.rule-block{border:1px solid var(--border);border-radius:var(--radius-md);padding:18px 18px 6px;margin:0}
.rule-block legend{padding:0 8px;font-family:var(--font-display);font-weight:600;font-size:.92rem;color:var(--text-primary)}
.field-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.field{flex:1 1 180px;display:flex;flex-direction:column;gap:6px}
.field label{font-size:.82rem;color:var(--text-muted)}
.field-check{flex-direction:row;align-items:center;justify-content:flex-start;gap:8px}
.field-check label{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-secondary);cursor:pointer}
input[type="text"],input[type="number"],select{
  width:100%;padding:11px 13px;border-radius:9px;
  border:1px solid var(--border);background:var(--navy-800);
  color:var(--text-primary);font-size:.92rem;font-family:inherit;
}
input:focus,select:focus{border-color:var(--accent)}
input[type="checkbox"]{width:16px;height:16px;accent-color:var(--accent)}
.field-error{color:var(--danger);font-size:.82rem;margin:-8px 0 12px}

.app-actions{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap}

/* ===== Results ===== */
.results-section{padding:20px 0 64px}
.results-toolbar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:20px;justify-content:center}
.toolbar-msg{font-size:.85rem;color:var(--success)}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--navy-900)}
.results-table{width:100%;border-collapse:collapse;font-size:.88rem;min-width:560px}
.results-table th{text-align:left;padding:12px 16px;background:var(--navy-800);color:var(--text-muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}
.results-table td{padding:12px 16px;border-top:1px solid var(--border);color:var(--text-secondary);word-break:break-word}
.results-table tr:hover td{background:var(--navy-800)}
.results-table .new-name{color:var(--success);font-weight:500}
.results-table .name-error{color:var(--danger)}

/* ===== Tools strip ===== */
.tools-strip{padding:56px 0;background:var(--navy-900);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.strip-heading{text-align:center;font-size:1.3rem;margin-bottom:24px}
.strip-grid{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.strip-grid a{
  padding:9px 16px;border-radius:999px;border:1px solid var(--border);
  background:var(--navy-800);color:var(--text-secondary);font-size:.83rem;
}
.strip-grid a:hover{border-color:var(--accent);color:var(--text-primary)}

/* ===== Features ===== */
.features{padding:72px 0}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
.feature-card{
  padding:26px;border:1px solid var(--border);border-radius:var(--radius-md);
  background:var(--navy-900);
}
.feature-card svg{color:var(--accent);margin-bottom:14px}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{font-size:.9rem;margin:0}

/* ===== How it works ===== */
.how-it-works{padding:72px 0;background:var(--navy-900);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.step-card{padding:22px;background:var(--navy-950);border:1px solid var(--border);border-radius:var(--radius-md)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;font-family:var(--font-display);font-weight:700;font-size:.9rem;margin-bottom:14px;
}
.step-card h3{font-size:1rem;margin-bottom:6px}
.step-card p{font-size:.87rem;margin:0}

/* ===== SEO copy ===== */
.seo-copy{padding:64px 0}
.seo-copy p{font-size:.96rem}

/* ===== FAQ ===== */
.faq{padding:64px 0}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-md);padding:16px 20px;background:var(--navy-900)}
.faq-item summary{cursor:pointer;font-weight:600;color:var(--text-primary);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:1.3rem;color:var(--accent);margin-left:12px}
.faq-item[open] summary::after{content:'\2212'}
.faq-item p{margin-top:12px;margin-bottom:0;font-size:.92rem}

/* ===== CTA ===== */
.cta{padding:64px 0 80px}
.cta-inner{text-align:center;padding:48px 32px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--navy-800),var(--navy-700));border:1px solid var(--border)}
.cta-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* ===== Footer ===== */
.site-footer{background:var(--navy-900);border-top:1px solid var(--border);padding:56px 24px 0}
.footer-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px;padding-bottom:40px}
.footer-col h4{font-size:.85rem;color:var(--text-primary);margin-bottom:14px;text-transform:uppercase;letter-spacing:.03em}
.footer-col a{display:block;padding:6px 0;color:var(--text-muted);font-size:.87rem}
.footer-col a:hover{color:var(--accent)}
.footer-brand p{font-size:.87rem;margin-top:12px}
.footer-bottom{max-width:1180px;margin:0 auto;border-top:1px solid var(--border);padding:20px 0 28px;text-align:center}
.footer-bottom p{font-size:.78rem;color:var(--text-muted);margin:0 0 6px;max-width:760px;margin-left:auto;margin-right:auto}

/* ===== Cookie banner ===== */
.cookie-banner{
  position:fixed;bottom:16px;left:16px;right:16px;max-width:480px;
  background:var(--navy-800);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:18px;box-shadow:var(--shadow);z-index:150;
}
.cookie-banner p{font-size:.85rem;margin-bottom:12px}
.cookie-actions{display:flex;gap:10px;justify-content:flex-end}

/* ===== Back to top ===== */
.back-to-top{
  position:fixed;bottom:20px;right:20px;width:44px;height:44px;border-radius:12px;
  background:var(--accent);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow);z-index:120;
}

/* ===== Responsive ===== */
@media (max-width:900px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  .features-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .app-shell{padding:20px}
  .hero{padding:64px 16px 48px}
  .section-inner{padding:0 16px}
  .results-table{min-width:480px}
}