/* faststone-app.co.com — FastStone Image Viewer download portal (Type 1).
   Clean modern light theme: gradient bg, glass cards, blue accent + green CTA, serif headings.
   System fonts only (no external @import) — fast LCP. */
:root{
  --blue:#1f6fb2; --blue-dark:#14568c;
  --green:#1b7f3a; --green-dark:#15672f;
  --ink:#0b1220; --text:#28313f; --muted:#5b6675;
  --bg0:#eef6ff; --bg1:#f7fbff; --bg2:#ffffff;
  --surface:#ffffff; --surface-soft:#f4f8fd;
  --border:#d9e3ef; --border-soft:#e9f0f8;
  --radius:16px; --radius-sm:11px; --radius-pill:999px;
  --shadow:0 14px 40px rgba(15,40,80,.10);
  --shadow-sm:0 4px 14px rgba(15,40,80,.07);
  --max:1120px;
  --serif:"Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --sans:"Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{background:linear-gradient(180deg,#eef6ff 0%,#f7fbff 40%,#ffffff 100%);background-attachment:fixed;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--text);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{font-family:var(--serif);color:var(--ink);line-height:1.18;margin:0 0 .5em;font-weight:600}
h1{font-size:2.35rem;letter-spacing:-.01em}
h2{font-size:1.55rem;margin-top:1.6em}
h3{font-size:1.16rem}
p{margin:0 0 1em}
.fs-wrap,.container{max-width:var(--max);margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:30;background:rgba(247,251,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-soft)}
.header-inner{max-width:var(--max);margin:0 auto;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.fs-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:1.5rem;font-weight:700;color:var(--ink)}
.fs-brand:hover{text-decoration:none}
.fs-brand img{width:30px;height:30px;border-radius:7px}
.fs-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.fs-nav a{padding:8px 15px;border-radius:var(--radius-pill);color:var(--text);font-size:.95rem;font-weight:500}
.fs-nav a:hover{background:var(--surface-soft);text-decoration:none;color:var(--blue)}
.fs-nav a.active{background:#e4eefb;color:var(--blue-dark)}
.fs-nav a.official{color:var(--green-dark);font-weight:600}

/* ---------- hero ---------- */
.hero{padding:44px 0 8px}
.hero-card{background:linear-gradient(135deg,#ffffff 0%,#f2f8ff 100%);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 40px;display:grid;grid-template-columns:1.5fr 1fr;gap:32px;align-items:center}
.hero-eyebrow{display:inline-block;font-family:var(--sans);font-size:.78rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.hero h1{margin-bottom:.35em}
.hero-tagline{font-size:1.12rem;color:var(--muted);max-width:52ch;margin-bottom:22px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-pill);padding:8px 16px;font-size:.86rem;color:var(--text);box-shadow:var(--shadow-sm)}
.chip strong{color:var(--ink)}
.hero-media img{border-radius:var(--radius-sm);border:1px solid var(--border);box-shadow:var(--shadow)}

/* ---------- download buttons (hero + download page) ---------- */
.fs-dl-row{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 10px}
.fs-dl{display:inline-flex;align-items:center;gap:10px;background:var(--green);color:#fff;padding:15px 30px;border-radius:var(--radius-pill);font-weight:700;font-size:1rem;box-shadow:0 8px 22px rgba(27,127,58,.24);border:0}
.fs-dl:hover{background:var(--green-dark);color:#fff;text-decoration:none}
.fs-dl small{display:block;font-weight:500;font-size:.74rem;opacity:.85}
.fs-dl-ghost{display:inline-flex;align-items:center;gap:8px;background:var(--surface);color:var(--blue-dark);padding:15px 26px;border-radius:var(--radius-pill);font-weight:600;border:1px solid var(--border)}
.fs-dl-ghost:hover{background:var(--surface-soft);text-decoration:none}
.version-line{font-size:.9rem;color:var(--muted);margin-top:8px}

/* ---------- product cards (home) ---------- */
.fs-section{padding:14px 0}
.fs-section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.fs-section-head .muted{color:var(--muted);font-size:.92rem}
.fs-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:22px}
.fs-card{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px;transition:box-shadow .2s,transform .2s}
.fs-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.download-card{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px;margin-bottom:20px}
.card-head{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:start}
.card-media img{width:104px;border-radius:var(--radius-sm);border:1px solid var(--border)}
.product-name{font-size:1.28rem;margin:0 0 8px}
.product-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.tag{background:var(--surface-soft);border:1px solid var(--border);border-radius:var(--radius-pill);padding:4px 12px;font-size:.8rem;color:var(--muted);font-family:var(--sans)}
.tag.free{background:#e7f6ec;border-color:#bfe6cb;color:var(--green-dark);font-weight:600}
.product-copy{color:var(--text);font-size:.96rem;margin:0}
.card-actions{display:flex;flex-direction:column;gap:10px;align-self:center;min-width:150px}
.button-primary{display:inline-block;text-align:center;background:var(--green);color:#fff;padding:12px 24px;border-radius:var(--radius-pill);font-weight:700}
.button-primary:hover{background:var(--green-dark);color:#fff;text-decoration:none}
.button-ghost{display:inline-block;text-align:center;background:var(--surface);color:var(--blue-dark);padding:12px 24px;border-radius:var(--radius-pill);font-weight:600;border:1px solid var(--border)}
.button-ghost:hover{background:var(--surface-soft);text-decoration:none}

/* ---------- content blocks ---------- */
.fs-lead{font-size:1.12rem;color:var(--text);background:var(--surface-soft);border-left:4px solid var(--blue);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:18px 22px;margin:22px 0}
.fs-lead strong{color:var(--ink)}
.fs-panel{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:26px 28px;margin:20px 0}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 30px;margin:16px 0;padding:0}
.feature-grid li{list-style:none;padding-left:26px;position:relative;color:var(--text)}
.feature-grid li::before{content:"";position:absolute;left:0;top:.5em;width:11px;height:11px;border-radius:3px;background:var(--blue)}
.feature-grid li strong{color:var(--ink)}
.whatsnew{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:22px 24px}
.whatsnew h3{font-family:var(--sans);font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.whatsnew ul{margin:0;padding:0;list-style:none}
.whatsnew li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--border-soft);font-size:.92rem}
.whatsnew li:last-child{border-bottom:0}
.whatsnew time{color:var(--muted);font-size:.85rem;white-space:nowrap}
table.specs{width:100%;border-collapse:collapse;margin:14px 0}
table.specs th,table.specs td{text-align:left;padding:11px 14px;border:1px solid var(--border);font-size:.94rem}
table.specs th{background:var(--surface-soft);color:var(--ink);font-family:var(--sans);width:34%}

/* ---------- breadcrumbs / faq ---------- */
.fs-crumbs{font-size:.86rem;color:var(--muted);padding:16px 0 0}
.fs-crumbs a{color:var(--muted)}
.fs-crumbs span{color:var(--ink)}
.fs-faq details{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius-sm);padding:4px 18px;margin-bottom:12px;box-shadow:var(--shadow-sm)}
.fs-faq summary{cursor:pointer;font-weight:600;color:var(--ink);padding:14px 0;font-family:var(--serif);font-size:1.04rem}
.fs-faq p{padding:0 0 14px;margin:0;color:var(--text)}

/* ---------- footer ---------- */
.site-footer{margin-top:56px;background:#0e2338;color:#c6d4e4}
.fs-foot-grid{max-width:var(--max);margin:0 auto;padding:44px 22px 16px;display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}
.site-footer h4{color:#fff;font-family:var(--sans);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;margin:0 0 14px}
.fs-foot-brand{font-family:var(--serif);font-size:1.3rem;color:#fff;margin-bottom:10px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:#c6d4e4;font-size:.93rem}
.site-footer a:hover{color:#fff}
.fs-foot-note{font-size:.8rem;color:#8ea3ba;line-height:1.55;margin-top:14px}
.fs-foot-bottom{border-top:1px solid rgba(255,255,255,.1);max-width:var(--max);margin:0 auto;padding:16px 22px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.82rem;color:#8ea3ba}

/* ---------- responsive ---------- */
@media(max-width:820px){
  .hero-card{grid-template-columns:1fr;padding:28px 22px}
  .hero-media{display:none}
  .fs-cards{grid-template-columns:1fr}
  .card-head{grid-template-columns:1fr;gap:14px}
  .card-media img{width:84px}
  .card-actions{flex-direction:row;min-width:0}
  .feature-grid{grid-template-columns:1fr}
  .fs-foot-grid{grid-template-columns:1fr;gap:24px}
  h1{font-size:1.9rem}
}