/* SlideShare Downloader — design system */
*,*::before,*::after{box-sizing:border-box}
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#dbeafe;
  --accent:#6366f1;--accent-2:#8b5cf6;
  --bg:#ffffff;--bg-alt:#f8fafc;--bg-dark:#0f172a;
  --text:#0f172a;--text-muted:#475569;--text-light:#94a3b8;
  --border:#e2e8f0;--card:#ffffff;
  --success:#10b981;--danger:#ef4444;
  --radius:14px;--radius-sm:8px;--radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 4px 12px rgba(15,23,42,.08);
  --shadow-lg:0 20px 40px -10px rgba(37,99,235,.25);
  --gradient:linear-gradient(135deg,#2563eb 0%,#6366f1 60%,#8b5cf6 100%);
  --container:1180px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark);text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .6em;color:var(--text);font-weight:700}
h1{font-size:clamp(2rem,5vw,3.25rem);letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,3.4vw,2.25rem);letter-spacing:-.015em}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--container);margin:0 auto;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--text)}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--gradient);display:grid;place-items:center;color:#fff;font-weight:900}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:6px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--text);padding:8px 14px;border-radius:8px;font-weight:500;font-size:.95rem}
.nav-links a:hover{background:var(--bg-alt);text-decoration:none}
.nav-cta{background:var(--gradient);color:#fff !important;padding:9px 18px !important;border-radius:10px;font-weight:600}
.nav-cta:hover{opacity:.94}
.nav-toggle{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--text)}
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);min-width:220px;padding:8px;margin-top:6px}
.dropdown:hover .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:9px 12px;border-radius:8px}
@media(max-width:880px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;border-bottom:1px solid var(--border);padding:12px;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{width:100%}
  .dropdown-menu{position:static;box-shadow:none;border:0;padding-left:14px;display:block}
}

/* hero */
.hero{background:linear-gradient(180deg,#eef2ff 0%,#ffffff 100%);padding:64px 0 56px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{margin-bottom:18px}
.hero-sub{font-size:1.15rem;color:var(--text-muted);max-width:560px}
.hero-bullets{list-style:none;padding:0;margin:18px 0 28px;display:grid;gap:8px}
.hero-bullets li{padding-left:28px;position:relative;color:var(--text-muted)}
.hero-bullets li::before{content:"";position:absolute;left:0;top:7px;width:18px;height:18px;background:var(--primary-light);border-radius:50%}
.hero-bullets li::after{content:"";position:absolute;left:4px;top:11px;width:10px;height:6px;border-left:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg)}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr}.hero{padding:40px 0}}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:12px;font-weight:600;font-size:1rem;border:0;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;text-decoration:none;font-family:inherit}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:var(--shadow-lg)}
.btn-primary:hover{color:#fff;opacity:.95}
.btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg-alt)}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}

/* sections */
section{padding:64px 0}
section.tight{padding:48px 0}
.section-head{text-align:center;max-width:740px;margin:0 auto 40px}
.section-head .eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--primary);background:var(--primary-light);padding:6px 14px;border-radius:999px;margin-bottom:14px}
.section-head p{color:var(--text-muted);font-size:1.05rem}
.bg-alt{background:var(--bg-alt)}

/* tool card */
.tool-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);max-width:780px;margin:0 auto}
.tool-row{display:flex;gap:10px;flex-wrap:wrap}
.tool-row input,.tool-row textarea{flex:1;min-width:240px;padding:14px 16px;border:1.5px solid var(--border);border-radius:12px;font-size:1rem;font-family:inherit;background:#fff;color:var(--text);transition:border-color .15s}
.tool-row input:focus,.tool-row textarea:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.tool-help{font-size:.9rem;color:var(--text-muted);margin-top:12px}
.tool-result{margin-top:18px;padding:14px 16px;border-radius:10px;font-size:.95rem;display:none}
.tool-result.ok{display:block;background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.tool-result.err{display:block;background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.tool-result.info{display:block;background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative;text-align:center}
.step-num{width:42px;height:42px;border-radius:50%;background:var(--gradient);color:#fff;display:grid;place-items:center;font-weight:800;margin:0 auto 14px}
.step h3{font-size:1.1rem;margin-bottom:6px}
.step p{color:var(--text-muted);font-size:.95rem;margin:0}
@media(max-width:880px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* feature cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-icon{width:48px;height:48px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:grid;place-items:center;font-size:1.5rem;margin-bottom:14px}
.card h3{font-size:1.1rem;margin-bottom:6px}
.card p{color:var(--text-muted);margin:0}
@media(max-width:880px){.cards{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.cards{grid-template-columns:1fr}}

/* formats */
.formats{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.format-pill{background:#fff;border:1px solid var(--border);border-radius:999px;padding:12px 24px;font-weight:600;color:var(--text);box-shadow:var(--shadow-sm)}

/* comparison */
.table-wrap{overflow-x:auto}
table.compare{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border)}
table.compare th,table.compare td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border)}
table.compare th{background:var(--bg-alt);font-weight:700;font-size:.95rem}
table.compare td.yes{color:var(--success);font-weight:600}
table.compare td.no{color:var(--danger);font-weight:600}

/* content text */
.prose{max-width:820px;margin:0 auto;color:var(--text)}
.prose p,.prose li{color:#334155}
.prose h2,.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.4em}
.prose ul li,.prose ol li{margin-bottom:.4em}

/* FAQ */
.faq{max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px 22px;margin-bottom:12px;transition:box-shadow .15s}
.faq details[open]{box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--primary);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:12px 0 0;color:var(--text-muted)}

/* reviews */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.review .stars{color:#f59e0b;letter-spacing:2px;margin-bottom:8px}
.review p{font-style:italic;color:#334155}
.review .who{margin-top:12px;font-weight:600;font-size:.95rem;color:var(--text)}
@media(max-width:880px){.reviews{grid-template-columns:1fr}}

/* blog grid */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.blog-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.blog-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}
.blog-card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.blog-card .body{padding:20px}
.blog-card h3{color:var(--text);margin-bottom:8px;font-size:1.1rem}
.blog-card p{color:var(--text-muted);font-size:.95rem;margin:0}
.blog-card .tag{display:inline-block;font-size:.75rem;font-weight:700;color:var(--primary);background:var(--primary-light);padding:4px 10px;border-radius:999px;margin-bottom:10px;letter-spacing:.06em;text-transform:uppercase}
@media(max-width:880px){.blog-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.blog-grid{grid-template-columns:1fr}}

/* tools grid */
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tool-link{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--text);display:block;transition:transform .2s,box-shadow .2s}
.tool-link:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}
.tool-link h3{color:var(--text);margin-bottom:6px}
.tool-link p{color:var(--text-muted);margin:0;font-size:.95rem}
@media(max-width:880px){.tools-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.tools-grid{grid-template-columns:1fr}}

/* CTA */
.cta-band{background:var(--gradient);color:#fff;border-radius:var(--radius-lg);padding:56px 32px;text-align:center}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.92);max-width:620px;margin:0 auto 22px}
.cta-band .btn-primary{background:#fff;color:var(--primary)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;align-items:center}
.gallery img{border-radius:var(--radius);box-shadow:var(--shadow)}
@media(max-width:760px){.gallery{grid-template-columns:1fr}}

/* footer */
footer.site{background:var(--bg-dark);color:#cbd5e1;padding:56px 0 26px;margin-top:40px}
footer.site h4{color:#fff;font-size:1rem;margin-bottom:14px}
footer.site a{color:#cbd5e1}
footer.site a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.foot-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:.95rem}
.foot-bottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:18px;font-size:.9rem;color:#94a3b8;text-align:center}
@media(max-width:880px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* AI panel */
.ai-panel{background:linear-gradient(135deg,#eef2ff,#fdf4ff);border:1px solid #c7d2fe;border-radius:var(--radius-lg);padding:32px;max-width:820px;margin:0 auto}
.ai-row{display:grid;grid-template-columns:160px 1fr;gap:10px;align-items:center;margin-bottom:12px}
.ai-row label{font-weight:600;font-size:.95rem}
.ai-row select,.ai-row input{padding:11px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:.95rem;font-family:inherit;background:#fff;width:100%}
.ai-row select:focus,.ai-row input:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
@media(max-width:520px){.ai-row{grid-template-columns:1fr}}
.ai-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.ai-output{margin-top:18px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px;max-height:340px;overflow:auto;white-space:pre-wrap;font-size:.95rem;display:none}
.ai-output.show{display:block}

/* utility */
.text-center{text-align:center}
.muted{color:var(--text-muted)}
.mt-4{margin-top:1.5rem}
.mb-4{margin-bottom:1.5rem}
.badge{display:inline-block;font-size:.75rem;font-weight:700;color:var(--primary);background:var(--primary-light);padding:4px 10px;border-radius:999px;letter-spacing:.06em;text-transform:uppercase}