[hidden]{display:none!important}

:root{
  --ink:#0f172a;
  --ink-soft:#475569;
  --paper:#f6f7fb;
  --card:#ffffff;
  --line:#e2e8f0;
  --brand:#101935;
  --brand-2:#1b2a55;
  --accent:#c8f04c;
  --accent-ink:#1a2405;
  --teal:#5eead4;
  --radius:16px;
  --shadow:0 20px 50px rgba(15,23,42,.14);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;color:var(--ink);background:var(--paper);line-height:1.6}
h1,h2,h3,.brand-name{font-family:'Sora',sans-serif}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:rgba(15,23,42,.07);padding:.1em .35em;border-radius:6px;font-size:.92em}
.container{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:28px;height:68px;padding:0 clamp(16px,4vw,40px);background:rgba(16,25,53,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:var(--accent-ink);font-weight:800;font-size:20px}
.brand-name{font-weight:700;letter-spacing:.02em}
.brand-name em{font-style:normal;color:var(--accent)}
.site-nav{display:flex;gap:22px;margin-left:auto}
.site-nav a{color:rgba(255,255,255,.75);text-decoration:none;font-size:.92rem;font-weight:500;transition:color .2s}
.site-nav a:hover{color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer;font:600 .95rem 'Inter',sans-serif;padding:13px 26px;border-radius:999px;text-decoration:none;transition:transform .15s,box-shadow .2s,background .2s}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-sm{padding:9px 20px;font-size:.88rem}
.btn-accent{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 18px rgba(200,240,76,.35)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(200,240,76,.45)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink-soft);background:#fff}

/* ---------- hero ---------- */
.hero{position:relative;min-height:clamp(560px,78vh,760px);background:url('img/hero.webp') center/cover no-repeat,#101935;padding:clamp(56px,9vh,110px) 24px 200px}
.hero-scrim{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(16,25,53,.72) 0%,rgba(16,25,53,.55) 45%,rgba(16,25,53,.88) 100%)}
.hero-content{position:relative;z-index:2;max-width:820px;margin:0 auto;text-align:center;color:#fff}
.eyebrow{display:inline-block;font:600 .78rem 'Inter',sans-serif;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);margin-bottom:18px}
.eyebrow-dark{color:#0d9488}
.hero h1{font-size:clamp(2rem,4.6vw,3.4rem);font-weight:800;line-height:1.12;letter-spacing:-.01em;margin-bottom:20px}
.hl{color:var(--accent)}
.hero-sub{font-size:clamp(1rem,1.6vw,1.15rem);color:rgba(255,255,255,.82);max-width:640px;margin:0 auto}

/* drop card overlapping hero */
.drop-wrap{position:relative;z-index:2;max-width:680px;margin:48px auto -140px}
.drop-card{background:var(--card);border:2px dashed #c3cbdc;border-radius:22px;box-shadow:var(--shadow);padding:clamp(32px,5vw,52px) 32px;text-align:center;cursor:pointer;transition:border-color .2s,transform .2s,box-shadow .2s}
.drop-card:hover{border-color:#93a3c4;transform:translateY(-3px)}
.drop-card.dragover{border-color:#84cc16;background:#fbfff0;box-shadow:0 24px 60px rgba(132,204,22,.25)}
.drop-icon{color:#7c8db5;margin-bottom:14px}
.drop-card.dragover .drop-icon{color:#65a30d}
.drop-title{font-size:clamp(1.05rem,2.2vw,1.3rem);font-weight:700;margin-bottom:6px}
.drop-sub{color:var(--ink-soft);font-size:.9rem;margin-bottom:14px}
.drop-hint{margin-top:18px;font-size:.82rem;color:#94a3b8}

.error-banner{display:flex;align-items:center;gap:14px;margin-top:16px;background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:14px 18px;border-radius:12px;font-size:.92rem;box-shadow:0 8px 24px rgba(185,28,28,.1)}
.error-banner span{flex:1}
.error-close{background:none;border:none;color:#b91c1c;font-size:1rem;cursor:pointer;padding:4px;line-height:1}

/* ---------- result ---------- */
.result-section{padding:200px 0 80px;background:var(--paper)}
.result-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:20px;margin-bottom:32px}
.result-title{font-size:clamp(1.4rem,3vw,2rem);font-weight:800;word-break:break-all}
.result-actions{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:40px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;display:flex;flex-direction:column;gap:4px}
.stat-num{font:800 1.7rem 'Sora',sans-serif;color:var(--brand)}
.stat-label{font-size:.82rem;color:var(--ink-soft);letter-spacing:.02em}

.preview-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px;flex-wrap:wrap}
.preview-label{font:600 .8rem 'Inter',sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}
.viewport-toggle{display:flex;background:#e8ecf4;border-radius:999px;padding:4px;gap:4px}
.vp-btn{border:none;background:transparent;padding:8px 18px;border-radius:999px;font:600 .85rem 'Inter',sans-serif;color:var(--ink-soft);cursor:pointer;transition:background .2s,color .2s}
.vp-btn.active{background:var(--brand);color:#fff}

.preview-stage{background:repeating-conic-gradient(#eef1f7 0 25%,#e5e9f2 0 50%) 0 0/28px 28px;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;justify-content:center}
.preview-frame-wrap{width:100%;max-width:100%;transition:width .35s ease;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 12px 32px rgba(15,23,42,.12)}
.preview-frame-wrap.mobile{width:375px}
#previewFrame{display:block;width:100%;height:560px;border:none;background:#fff}
.preview-note{margin-top:14px;font-size:.82rem;color:#94a3b8;text-align:center}

/* ---------- how ---------- */
.how{padding:90px 0;background:#fff;position:relative}
.section-title{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;margin:6px 0 36px;letter-spacing:-.01em}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.step-card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:36px 26px 30px;transition:transform .2s,box-shadow .25s}
.step-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.step-num{position:absolute;top:-16px;left:22px;z-index:1;background:var(--accent);color:var(--accent-ink);font:800 .85rem 'Sora',sans-serif;padding:6px 14px;border-radius:999px;box-shadow:0 6px 14px rgba(200,240,76,.4)}
.step-card h3{font-size:1.08rem;margin-bottom:10px}
.step-card p{font-size:.92rem;color:var(--ink-soft)}

/* ---------- privacy ---------- */
.privacy{background:var(--brand);color:#fff;padding:70px 0}
.privacy-inner{display:flex;gap:28px;align-items:flex-start}
.privacy-badge{flex:0 0 auto;width:62px;height:62px;display:grid;place-items:center;font-size:1.7rem;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:18px}
.privacy .section-title{margin-bottom:12px}
.privacy p{color:rgba(255,255,255,.75);max-width:620px}

/* ---------- footer ---------- */
.site-footer{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;padding:26px clamp(16px,4vw,40px);background:#0b1226;color:rgba(255,255,255,.65);font-size:.85rem}
.site-footer em{font-style:normal;color:var(--accent)}
.foot-dim{color:rgba(255,255,255,.35)}

/* ---------- overlay ---------- */
.overlay{position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.55);backdrop-filter:blur(4px);display:grid;place-items:center}
.overlay-card{background:#fff;border-radius:18px;padding:40px 52px;text-align:center;box-shadow:var(--shadow);font-weight:600}
.spinner{width:46px;height:46px;margin:0 auto 18px;border-radius:50%;border:4px solid #e2e8f0;border-top-color:var(--brand);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- responsive ---------- */
@media (max-width:720px){
  .site-nav{display:none}
  .hero{padding-bottom:180px}
  .drop-wrap{margin-bottom:-120px}
  .result-section{padding-top:170px}
  .result-actions{margin-left:0}
  .privacy-inner{flex-direction:column}
  .preview-stage{padding:12px}
  #previewFrame{height:440px}
}