/* 파일캐스트 무료쿠폰 - Global Styles */
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --secondary:#7c3aed;
  --accent:#f59e0b;
  --success:#10b981;
  --danger:#ef4444;
  --bg:#f8fafc;
  --surface:#ffffff;
  --text:#0f172a;
  --text-muted:#475569;
  --border:#e2e8f0;
  --radius:14px;
  --shadow:0 10px 30px -10px rgba(37,99,235,.18);
  --grad:linear-gradient(135deg,#2563eb 0%,#7c3aed 100%);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Pretendard','Apple SD Gothic Neo','Malgun Gothic',-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased
}
img{max-width:100%;display:block;height:auto;border-radius:10px}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--text)}
.logo img{width:32px;height:32px;border-radius:8px}
.nav-links{display:flex;gap:22px;list-style:none}
.nav-links a{color:var(--text-muted);font-weight:600;font-size:.95rem}
.nav-links a.active,.nav-links a:hover{color:var(--primary);text-decoration:none}

/* Hero */
.hero{padding:60px 0 40px;background:var(--grad);color:#fff;border-radius:0 0 30px 30px;margin-bottom:40px}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{font-size:2.4rem;font-weight:800;line-height:1.25;margin-bottom:16px;letter-spacing:-.02em}
.hero p{font-size:1.08rem;opacity:.95;margin-bottom:24px}
.hero img{box-shadow:0 30px 60px -20px rgba(0,0,0,.35)}
.badge{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:6px 14px;border-radius:999px;font-size:.85rem;font-weight:600;margin-bottom:16px}

/* Sections */
section{padding:50px 0}
section h2{font-size:1.85rem;font-weight:800;margin-bottom:14px;letter-spacing:-.02em}
section h2 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
section .lead{color:var(--text-muted);font-size:1.05rem;margin-bottom:30px;max-width:760px}

/* Cards / Grid */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 1px 3px rgba(15,23,42,.04);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card h3{font-size:1.15rem;margin-bottom:8px;font-weight:700}
.card p{color:var(--text-muted);font-size:.95rem}
.card .icon{width:48px;height:48px;border-radius:12px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;font-weight:800;margin-bottom:14px}

/* Coupon Card */
.coupon-list{display:grid;gap:18px;grid-template-columns:repeat(3,1fr);margin-top:20px}
.coupon{position:relative;background:#fff;border:2px dashed var(--primary);border-radius:18px;padding:24px;text-align:center;transition:.25s}
.coupon::before,.coupon::after{content:"";position:absolute;width:24px;height:24px;background:var(--bg);border-radius:50%;top:50%;transform:translateY(-50%)}
.coupon::before{left:-12px}.coupon::after{right:-12px}
.coupon-label{display:inline-block;background:var(--grad);color:#fff;padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:700;margin-bottom:12px;letter-spacing:.05em}
.coupon-code{font-family:'JetBrains Mono','Courier New',monospace;font-size:1.35rem;font-weight:800;color:var(--text);margin:10px 0 14px;letter-spacing:.05em}
.coupon-meta{font-size:.85rem;color:var(--text-muted);margin-bottom:14px}
.btn{display:inline-block;background:var(--grad);color:#fff;border:none;padding:12px 22px;border-radius:10px;font-weight:700;cursor:pointer;font-size:.95rem;transition:.2s;text-decoration:none}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none;color:#fff}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-block{display:block;width:100%}
.btn-lg{padding:16px 32px;font-size:1.05rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:24px}
.step{background:#fff;border-radius:14px;padding:24px;border:1px solid var(--border);position:relative}
.step-num{position:absolute;top:-14px;left:20px;background:var(--grad);color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem}
.step h4{margin:8px 0 6px;font-size:1.05rem}
.step p{color:var(--text-muted);font-size:.9rem}

/* Table */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border)}
th{background:#f1f5f9;font-weight:700;color:var(--text)}
tr:last-child td{border-bottom:none}
tr:hover td{background:#f8fafc}
.tag-best{background:#dcfce7;color:#166534;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:700}

/* Calculator */
.calc{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:16px}
.calc label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px;color:var(--text-muted)}
.calc input,.calc select{width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:1rem;font-family:inherit;background:#f8fafc}
.calc input:focus,.calc select:focus{outline:none;border-color:var(--primary);background:#fff}
.calc-result{margin-top:18px;padding:22px;background:var(--grad);color:#fff;border-radius:12px;text-align:center}
.calc-result .big{font-size:2.2rem;font-weight:800;display:block;margin:6px 0}
.calc-result small{opacity:.85}

/* Image gallery */
.media-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px}
.media-grid figure{margin:0}
.media-grid figcaption{text-align:center;font-size:.85rem;color:var(--text-muted);margin-top:8px}

/* FAQ */
.faq{background:#fff;border:1px solid var(--border);border-radius:12px;margin-bottom:10px;overflow:hidden}
.faq summary{padding:18px 22px;cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--primary);transition:.2s}
.faq[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 18px;color:var(--text-muted)}

/* CTA */
.cta-block{background:var(--grad);color:#fff;padding:46px;border-radius:24px;text-align:center;margin:40px 0}
.cta-block h2{color:#fff;font-size:1.8rem;margin-bottom:10px}
.cta-block p{opacity:.95;margin-bottom:22px}
.cta-block .btn{background:#fff;color:var(--primary)}

/* Footer */
footer{background:#0f172a;color:#cbd5e1;padding:40px 0 24px;margin-top:60px}
footer .container{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
footer h4{color:#fff;margin-bottom:12px;font-size:1rem}
footer a{color:#cbd5e1;font-size:.92rem;display:block;padding:4px 0}
.copyright{text-align:center;border-top:1px solid #1e293b;margin-top:24px;padding-top:18px;font-size:.85rem;color:#64748b}

/* Toast */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(120%);background:#0f172a;color:#fff;padding:14px 24px;border-radius:12px;font-weight:600;box-shadow:0 20px 50px rgba(0,0,0,.25);transition:transform .35s cubic-bezier(.2,.9,.3,1.2);z-index:100}
.toast.show{transform:translateX(-50%) translateY(0)}

/* Responsive */
@media(max-width:860px){
  .hero-inner,.grid-3,.grid-2,.coupon-list,.steps,.media-grid,footer .container{grid-template-columns:1fr}
  .hero{padding:40px 0 30px}
  .hero h1{font-size:1.7rem}
  section{padding:36px 0}
  section h2{font-size:1.5rem}
  .nav-links{gap:14px}
  .calc .row{grid-template-columns:1fr}
  .cta-block{padding:30px 20px}
}