/* ============ ROOT / THEME VARIABLES ============ */
:root{
  --bg:#f7f8fb;
  --bg-alt:#ffffff;
  --text:#181c25;
  --text-muted:#5c6270;
  --border:#e5e7ee;
  --card:#ffffff;
  --primary:#1877f2;
  --primary-dark:#145dc4;
  --primary-light:#e8f1ff;
  --accent:#00c853;
  --danger:#e0245e;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 4px 24px rgba(20,25,40,.06);
  --shadow-lg:0 12px 40px rgba(20,25,40,.12);
  --font-body:'Inter',system-ui,sans-serif;
  --font-head:'Outfit',system-ui,sans-serif;
}
[data-theme="dark"]{
  --bg:#0f1117;
  --bg-alt:#161923;
  --text:#eef1f7;
  --text-muted:#9aa1b1;
  --border:#262a38;
  --card:#161923;
  --primary:#4d94ff;
  --primary-dark:#2f7ce0;
  --primary-light:#1a2740;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --shadow-lg:0 12px 40px rgba(0,0,0,.55);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  transition:background .25s ease,color .25s ease;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.2}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.skip-link{position:absolute;left:-999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;z-index:999;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* ============ LAYOUT HELPERS ============ */
.section-inner{max-width:1180px;margin:0 auto;padding:64px 24px}
.section-inner.narrow{max-width:820px}
.section-heading{font-size:clamp(1.5rem,3vw,2.1rem);text-align:center;margin-bottom:36px}
.section-heading-sm{font-size:1.3rem;text-align:center;margin-bottom:24px}

/* ============ HEADER ============ */
.site-header{
  position:sticky;top:0;z-index:200;
  background:var(--bg-alt);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(8px);
}
.header-inner{
  max-width:1280px;margin:0 auto;padding:14px 20px;
  display:flex;align-items:center;gap:20px;
}
.logo{display:flex;align-items:baseline;gap:2px;font-family:var(--font-head);font-weight:800;font-size:1.25rem;flex-shrink:0}
.logo-mark{color:var(--primary)}
.logo-text{color:var(--text)}

.main-nav{flex:1}
.main-nav ul{display:flex;gap:8px;list-style:none;align-items:center}
.nav-link{padding:10px 14px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;display:flex;align-items:center;gap:6px;color:var(--text)}
.nav-link:hover{background:var(--primary-light);color:var(--primary)}

.has-mega{position:relative}
.mega-menu{
  position:absolute;top:100%;left:0;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:repeat(3,180px);gap:4px;
  padding:16px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
  z-index:150;
}
.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:var(--radius-sm);font-size:.88rem;color:var(--text-muted)}
.mega-col a:hover{background:var(--primary-light);color:var(--primary)}

.theme-toggle{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg);border:1px solid var(--border);flex-shrink:0;
}
.icon-moon{display:none}
[data-theme="dark"] .icon-sun{display:none}
[data-theme="dark"] .icon-moon{display:block}

.nav-toggle{display:none;flex-direction:column;gap:5px;width:32px;flex-shrink:0}
.nav-toggle span{width:100%;height:2px;background:var(--text);border-radius:2px;transition:.25s}

/* ============ BREADCRUMB ============ */
.breadcrumb{background:var(--bg);border-bottom:1px solid var(--border)}
.breadcrumb-inner{max-width:1180px;margin:0 auto;padding:10px 24px;font-size:.82rem;color:var(--text-muted);display:flex;gap:6px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--text)}

/* ============ HERO ============ */
.hero{
  background:linear-gradient(135deg,var(--primary-light),var(--bg) 70%);
  padding:72px 24px 56px;text-align:center;
}
.hero-inner{max-width:760px;margin:0 auto}
.eyebrow{display:inline-block;background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:999px;font-size:.78rem;font-weight:600;color:var(--primary);margin-bottom:18px}
.hero h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:16px}
.hero-sub{color:var(--text-muted);font-size:1.05rem;max-width:600px;margin:0 auto 28px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============ BUTTONS ============ */
.btn{padding:13px 26px;border-radius:var(--radius-sm);font-weight:600;font-size:.95rem;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost-light{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn-ghost-light:hover{background:rgba(255,255,255,.25)}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-small{padding:9px 16px;font-size:.85rem}
.btn-block{width:100%}
.btn:disabled{opacity:.6;cursor:not-allowed}

/* ============ TOOL SECTION ============ */
.tool-section{max-width:820px;margin:0 auto;padding:0 24px 60px}
.tool-card,.results-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);margin-top:-24px}
.tool-title{font-size:1.4rem;margin-bottom:6px}
.tool-desc{color:var(--text-muted);margin-bottom:24px;font-size:.92rem}

.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px}
.req{color:var(--danger)}
textarea,select,input[type="text"]{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--bg);color:var(--text);
  font-family:inherit;font-size:.92rem;resize:vertical;
}
textarea:focus,select:focus,input:focus{outline:none;border-color:var(--primary)}
.field-row{display:flex;justify-content:space-between;font-size:.75rem;color:var(--text-muted);margin-top:4px}
.field-error{color:var(--danger);font-weight:600}

.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 18px}
@media(max-width:520px){.form-grid{grid-template-columns:1fr}}

.toggle-row{display:flex;gap:24px;margin:18px 0;flex-wrap:wrap}
.switch{display:flex;align-items:center;gap:10px;font-size:.88rem;font-weight:500;cursor:pointer}
.switch input{position:absolute;opacity:0;width:0;height:0}
.slider{width:40px;height:22px;background:var(--border);border-radius:999px;position:relative;flex-shrink:0;transition:.2s}
.slider::before{content:'';position:absolute;width:16px;height:16px;background:#fff;border-radius:50%;top:3px;left:3px;transition:.2s}
.switch input:checked + .slider{background:var(--primary)}
.switch input:checked + .slider::before{transform:translateX(18px)}

.btn-spinner{display:none;width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
.submitting .btn-spinner{display:inline-block}
.submitting .btn-text::after{content:'...'}
@keyframes spin{to{transform:rotate(360deg)}}
.form-note{text-align:center;margin-top:12px;font-size:.85rem;color:var(--text-muted)}
.form-note.error{color:var(--danger)}
.form-note.success{color:var(--accent)}

/* ============ RESULTS ============ */
.results-card{margin-top:24px}
.results-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.results-header h2{font-size:1.15rem}
.results-actions{display:flex;gap:10px}
.caption-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.caption-item{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:14px 16px;display:flex;justify-content:space-between;align-items:flex-start;gap:12px;
}
.caption-item p{font-size:.93rem;flex:1}
.copy-one{flex-shrink:0;padding:7px 12px;font-size:.78rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--card)}
.copy-one:hover{border-color:var(--primary);color:var(--primary)}
.post-actions{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}

/* ============ RELATED TOOLS ============ */
.related-tools{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.chip-grid{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{padding:9px 16px;border:1px solid var(--border);border-radius:999px;font-size:.83rem;color:var(--text-muted);background:var(--card)}
.chip:hover{border-color:var(--primary);color:var(--primary)}

/* ============ FEATURES ============ */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:820px){.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.feature-grid{grid-template-columns:1fr}}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;text-align:left}
.feature-icon{font-size:1.8rem;margin-bottom:12px}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{color:var(--text-muted);font-size:.88rem}

/* ============ HOW IT WORKS ============ */
.how-it-works{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media(max-width:820px){.steps-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps-grid{grid-template-columns:1fr}}
.step{text-align:center}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;
  font-weight:700;margin-bottom:12px;
}
.step h3{font-size:1rem;margin-bottom:6px}
.step p{color:var(--text-muted);font-size:.86rem}

/* ============ SEO CONTENT ============ */
.seo-content p{margin-bottom:16px;color:var(--text-muted);font-size:.94rem}

/* ============ FAQ ============ */
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 0;font-weight:600;text-align:left;font-size:.98rem}
.faq-icon{font-size:1.3rem;transition:.2s;flex-shrink:0}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a p{padding-bottom:16px;color:var(--text-muted);font-size:.9rem}

/* ============ CTA ============ */
.cta{background:linear-gradient(135deg,var(--primary),var(--primary-dark));text-align:center;padding:64px 24px;color:#fff}
.cta h2{font-size:1.7rem;margin-bottom:10px}
.cta p{opacity:.9;margin-bottom:26px}
.cta-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta .btn-primary{background:#fff;color:var(--primary-dark)}
.cta .btn-primary:hover{background:#f0f0f0}

/* ============ FOOTER ============ */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:56px 24px 24px}
.footer-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr);gap:28px}
@media(max-width:900px){.footer-inner{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.footer-inner{grid-template-columns:1fr}}
.footer-col h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:14px;color:var(--text-muted)}
.footer-col a{display:block;font-size:.85rem;color:var(--text);padding:5px 0}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{max-width:1180px;margin:36px auto 0;padding-top:22px;border-top:1px solid var(--border);font-size:.78rem;color:var(--text-muted);text-align:center;line-height:1.7}

/* ============ COOKIE BANNER ============ */
.cookie-banner{
  position:fixed;bottom:16px;left:16px;right:16px;max-width:520px;margin:0 auto;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:18px 20px;z-index:500;
}
.cookie-banner p{font-size:.82rem;color:var(--text-muted);margin-bottom:12px}
.cookie-actions{display:flex;gap:10px}

/* ============ TOAST ============ */
.toast{
  position:fixed;bottom:24px;right:24px;background:var(--text);color:var(--bg);
  padding:12px 20px;border-radius:var(--radius-sm);font-size:.85rem;
  opacity:0;transform:translateY(10px);pointer-events:none;transition:.25s;z-index:600;
}
.toast.show{opacity:1;transform:translateY(0)}

/* ============ RESPONSIVE NAV ============ */
@media(max-width:900px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:0;right:-100%;width:min(320px,85vw);height:100vh;
    background:var(--bg-alt);border-left:1px solid var(--border);
    padding:80px 20px 20px;transition:right .25s ease;overflow-y:auto;z-index:190;
  }
  .main-nav.open{right:0}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .mega-menu{position:static;opacity:1;visibility:visible;transform:none;display:none;grid-template-columns:1fr;box-shadow:none;border:none;padding:4px 0 4px 14px}
  .has-mega.open .mega-menu{display:grid}
  .mega-trigger{width:100%;justify-content:space-between}
}
body.nav-open{overflow:hidden}

/* Prevent horizontal scroll on mobile */
html,body{max-width:100%}
.header-inner,.hero-inner,.section-inner,.tool-section,.footer-inner{max-width:100%}