/* ===== RESET & BASE ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:#0d0d0d;background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* ===== UTILITIES ===== */
.container{max-width:1140px;margin:0 auto;padding:0 24px}
.section{padding:100px 0}
.section--dark{background:#0a0a0a;color:#f5f5f5}
.section--light{background:#f8f8f8}
.tag{display:inline-block;font-size:.75rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:6px 14px;border-radius:100px;margin-bottom:20px}
.tag--blue{background:rgba(13,85,255,.08);color:#0D55FF}
.tag--white{background:rgba(255,255,255,.1);color:rgba(255,255,255,.7)}
.tag--dark{background:rgba(0,0,0,.06);color:#555}

/* ===== TYPOGRAPHY ===== */
h1,h2,h3,h4,h5{font-weight:700;line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(2.5rem,5.5vw,4rem)}
h2{font-size:clamp(2rem,4vw,3rem)}
h3{font-size:clamp(1.3rem,2.5vw,1.6rem)}
h4{font-size:1.05rem}
.text-muted{color:#666}
.text-muted-light{color:rgba(255,255,255,.5)}
.text-center{text-align:center}
.highlight{color:#0D55FF}
.section--dark .highlight{color:#5B93FF}
.section__sub{font-size:1.05rem;color:#666;margin-top:12px;max-width:560px;margin-left:auto;margin-right:auto;line-height:1.7}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;font-size:.95rem;font-weight:600;padding:14px 32px;border-radius:10px;border:none;cursor:pointer;transition:all .25s ease}
.btn--primary{background:#0D55FF;color:#fff}
.btn--primary:hover{background:#0a47d6;transform:translateY(-1px);box-shadow:0 8px 30px rgba(13,85,255,.25)}
.btn--outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.25)}
.btn--outline:hover{border-color:#5B93FF;color:#5B93FF}
.btn--outline-dark{background:transparent;color:#0d0d0d;border:1.5px solid #ddd}
.btn--outline-dark:hover{border-color:#0D55FF;color:#0D55FF}
.btn--sm{font-size:.85rem;padding:10px 22px;border-radius:8px}
.btn svg{width:18px;height:18px}

/* ===== NAV ===== */
.nav{position:fixed;top:0;left:0;width:100%;z-index:100;padding:16px 0;transition:all .3s}
.nav--scrolled{background:rgba(255,255,255,.95);backdrop-filter:blur(12px);box-shadow:0 1px 0 rgba(0,0,0,.06);padding:10px 0}
.nav__inner{display:flex;align-items:center;justify-content:space-between}
.nav__logo{font-size:1.5rem;font-weight:800;letter-spacing:-.03em;color:#f5f5f5}
.nav--scrolled .nav__logo{color:#0d0d0d}
.nav__logo span{color:#0D55FF}
.nav__links{display:flex;gap:32px}
.nav__links a{font-size:.88rem;font-weight:500;color:rgba(255,255,255,.7);transition:color .2s}
.nav--scrolled .nav__links a{color:#555}
.nav__links a:hover{color:#0D55FF}
.nav__cta{display:inline-flex}
.nav__hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.nav__hamburger span{width:22px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.nav--scrolled .nav__hamburger span{background:#0d0d0d}

/* ===== HERO ===== */
.hero{min-height:50vh;display:flex;align-items:center;padding-top:120px;padding-bottom:60px}
.hero__content .tag{margin-bottom:16px}
.hero__body{font-size:1.05rem;color:rgba(255,255,255,.6);line-height:1.7;margin-top:16px;max-width:600px;margin-left:auto;margin-right:auto}
.hero__actions{display:flex;gap:16px;margin-top:32px;flex-wrap:wrap;justify-content:center}

/* ===== TOOL SECTION ===== */
.tool__grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:48px;align-items:start}
.tool__form{background:#f8f8f8;border:1px solid #eee;border-radius:16px;padding:36px 32px}
.tool__form h3{font-size:1.2rem;margin-bottom:24px;color:#0d0d0d}
.tool__output{position:sticky;top:100px}
.tool__output h3{font-size:1.2rem;margin-bottom:16px;color:#0d0d0d}

/* Form elements */
.form-group{margin-bottom:20px}
.form-group:last-child{margin-bottom:0}
.form-group label{display:block;font-size:.88rem;font-weight:600;color:#333;margin-bottom:8px}
.form-group input[type="text"],.form-group input[type="url"],.form-group input[type="number"],.form-group select,.form-group textarea{
  width:100%;padding:12px 16px;font-size:.95rem;font-family:'Inter',sans-serif;font-weight:500;color:#0d0d0d;
  border:1.5px solid #e0e0e0;border-radius:10px;background:#fff;transition:border-color .2s,box-shadow .2s
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:#0D55FF;box-shadow:0 0 0 3px rgba(13,85,255,.1)
}
.form-group textarea{resize:vertical;min-height:100px;line-height:1.6}
.form-group small{display:block;margin-top:4px;color:#999;font-size:.8rem}
.form-group .char-count{float:right;font-size:.8rem;font-weight:500;color:#999;font-variant-numeric:tabular-nums}
.form-group .char-count.warn{color:#f59e0b}
.form-group .char-count.over{color:#ef4444}

/* Checkbox & radio */
.form-check{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.form-check input[type="checkbox"],.form-check input[type="radio"]{width:16px;height:16px;accent-color:#0D55FF}
.form-check label{font-size:.88rem;font-weight:500;color:#555;margin-bottom:0}

/* Output / Code block */
.output-card{background:#0a0a0a;border-radius:16px;padding:28px 24px;color:#f5f5f5}
.output-card h3{color:#f5f5f5;margin-bottom:16px;font-size:1.1rem}
.output-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.output-header h3{margin-bottom:0}
.code-block{background:#1a1a1a;border-radius:10px;padding:20px;overflow-x:auto;font-family:'SF Mono',SFMono-Regular,Consolas,'Liberation Mono',Menlo,monospace;font-size:.82rem;line-height:1.7;color:#e0e0e0;white-space:pre-wrap;word-break:break-all;max-height:500px;overflow-y:auto}
.code-block .tag-name{color:#5B93FF}
.code-block .attr-name{color:#f59e0b}
.code-block .attr-value{color:#22c55e}
.code-block .punctuation{color:#999}

.copy-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;background:#0D55FF;color:#fff;border:none;border-radius:8px;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif}
.copy-btn:hover{background:#0a47d6}
.copy-btn.copied{background:#22c55e}
.copy-btn svg{width:14px;height:14px}

/* Preview cards */
.preview-box{background:#fff;border:1px solid #e5e5e5;border-radius:12px;padding:20px;margin-top:16px}
.preview-box--dark{background:#1a1a1a;border-color:rgba(255,255,255,.08);color:#f5f5f5}

/* SERP preview */
.serp-preview{background:#fff;border-radius:12px;padding:24px;border:1px solid #e5e5e5;font-family:Arial,sans-serif}
.serp-preview__url{font-size:14px;color:#202124;display:flex;align-items:center;gap:8px;margin-bottom:4px}
.serp-preview__url .favicon{width:18px;height:18px;border-radius:50%;background:#eee;display:flex;align-items:center;justify-content:center;font-size:10px}
.serp-preview__url .breadcrumb{color:#4d5156;font-size:12px}
.serp-preview__title{font-size:20px;color:#1a0dab;line-height:1.3;margin-bottom:4px;cursor:pointer}
.serp-preview__title:hover{text-decoration:underline}
.serp-preview__desc{font-size:14px;color:#4d5156;line-height:1.58}

/* OG preview */
.og-preview{background:#fff;border-radius:12px;border:1px solid #dadde1;overflow:hidden;max-width:500px}
.og-preview__image{height:260px;background:#e4e6eb;display:flex;align-items:center;justify-content:center;color:#999;font-size:.9rem}
.og-preview__body{padding:12px 16px;border-top:1px solid #dadde1}
.og-preview__domain{font-size:12px;color:#606770;text-transform:uppercase;margin-bottom:4px}
.og-preview__title{font-size:16px;font-weight:600;color:#1d2129;line-height:1.3;margin-bottom:4px}
.og-preview__desc{font-size:14px;color:#606770;line-height:1.4}

/* Twitter preview */
.tw-preview{background:#000;border-radius:16px;border:1px solid #2f3336;overflow:hidden;max-width:500px;color:#e7e9ea}
.tw-preview__image{height:260px;background:#16181c;display:flex;align-items:center;justify-content:center;color:#71767b;font-size:.9rem}
.tw-preview__body{padding:12px 16px}
.tw-preview__domain{font-size:13px;color:#71767b;margin-bottom:2px}
.tw-preview__title{font-size:15px;font-weight:700;line-height:1.3;margin-bottom:2px}
.tw-preview__desc{font-size:15px;color:#71767b;line-height:1.4}

/* ===== TOOL HUB GRID ===== */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin-top:48px}
.tool-card{background:#fff;border:1px solid #eee;border-radius:16px;padding:28px 24px;transition:all .3s;display:flex;flex-direction:column}
.tool-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.06);border-color:rgba(13,85,255,.15)}
.tool-card__icon{width:48px;height:48px;background:rgba(13,85,255,.06);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:#0D55FF}
.tool-card__icon svg{width:24px;height:24px}
.tool-card h3{font-size:1.1rem;margin-bottom:8px}
.tool-card p{font-size:.9rem;color:#666;line-height:1.6;margin-bottom:16px;flex:1}
.tool-card__link{font-size:.88rem;font-weight:600;color:#0D55FF;display:inline-flex;align-items:center;gap:4px;transition:gap .2s}
.tool-card:hover .tool-card__link{gap:8px}

/* ===== HOW TO USE ===== */
.howto__steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px;margin-top:40px}
.howto__step{background:#fff;border:1px solid #eee;border-radius:14px;padding:28px 24px}
.howto__num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:rgba(13,85,255,.08);color:#0D55FF;border-radius:10px;font-weight:700;font-size:.85rem;margin-bottom:16px}
.howto__step h4{font-size:1rem;margin-bottom:8px}
.howto__step p{font-size:.9rem;color:#666;line-height:1.6}

/* ===== RELATED TOOLS ===== */
.related__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:40px}
.related__card{background:#f8f8f8;border-radius:12px;padding:22px 20px;transition:all .2s}
.related__card:hover{background:#f0f0f0;transform:translateY(-2px)}
.related__card h4{font-size:.95rem;margin-bottom:4px}
.related__card p{font-size:.82rem;color:#666}

/* ===== CTA ===== */
.cta__actions{display:flex;gap:16px;justify-content:center;margin-top:32px;flex-wrap:wrap}

/* ===== FOOTER ===== */
.footer{background:#0a0a0a;color:#f5f5f5;padding:64px 0 32px}
.footer__inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer__brand .nav__logo{color:#f5f5f5}
.footer__brand p{color:rgba(255,255,255,.4);font-size:.9rem;margin-top:12px;max-width:280px;line-height:1.7}
.footer__col h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.3);margin-bottom:20px}
.footer__col a{display:block;font-size:.9rem;color:rgba(255,255,255,.6);margin-bottom:12px;transition:color .2s}
.footer__col a:hover{color:#5B93FF}
.footer__review{margin-bottom:32px}
.footer__review-link{display:inline-flex;align-items:center;gap:10px;padding:12px 20px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:10px;transition:border-color .2s}
.footer__review-link:hover{border-color:rgba(255,255,255,.2)}
.footer__review-text{font-size:.85rem;color:rgba(255,255,255,.6)}
.footer__review-text strong{color:#f5f5f5}
.footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;align-items:center}
.footer__bottom p{font-size:.8rem;color:rgba(255,255,255,.3)}
.footer__legal{display:flex;gap:0}
.footer__legal a,.footer__bottom a{font-size:.8rem;color:rgba(255,255,255,.4);margin-left:24px}
.footer__legal a:hover,.footer__bottom a:hover{color:#5B93FF}
.footer__socials{display:flex;gap:16px}
.footer__socials a{color:rgba(255,255,255,.4);transition:color .2s}
.footer__socials a:hover{color:#5B93FF}

/* ===== ANIMATIONS ===== */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .5s ease,transform .5s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .tool__grid{grid-template-columns:1fr}
  .tool__output{position:static}
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .footer__inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:72px 0}
  .nav__links,.nav__cta{display:none}
  .nav__hamburger{display:flex}
  .nav__links.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;width:100%;background:#fff;padding:24px;gap:16px;box-shadow:0 8px 30px rgba(0,0,0,.08)}
  .nav__links.open a{color:#555}
  .hero{min-height:auto;padding:100px 0 48px}
  .hero__actions{flex-direction:column;align-items:center}
  .tool__grid{grid-template-columns:1fr;gap:32px}
  .tool__form{padding:24px 20px}
  .output-card{padding:24px 20px}
  .tools-grid{grid-template-columns:1fr}
  .howto__steps{grid-template-columns:1fr}
  .cta__actions{flex-direction:column;align-items:center}
  .footer__inner{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;gap:16px;text-align:center}
}