/* ========================================
   원더스에듀 SEO Landing — style.css
   Mobile-first / Performance-first
   ======================================== */

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:'Noto Sans KR',sans-serif;color:#1e293b;background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ---------- CSS Variables ---------- */
:root{
  --navy:     #1e3a5f;
  --navy-dark:#0f2040;
  --navy-light:#2d5a8e;
  --orange:   #f97316;
  --orange-dk:#ea6c0a;
  --gray-50:  #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-500: #64748b;
  --gray-700: #334155;
  --white:    #ffffff;
  --radius:   10px;
  --shadow:   0 4px 20px rgba(0,0,0,.08);
  --shadow-lg:0 8px 40px rgba(0,0,0,.12);
  --container:1100px;
}

/* ---------- Container ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}

/* ---------- Typography ---------- */
h1{font-size:clamp(1.75rem,5vw,2.75rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;color:var(--navy-dark)}
h2{font-size:clamp(1.4rem,3.5vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--navy)}
h3{font-size:clamp(1.1rem,2.5vw,1.3rem);font-weight:700;color:var(--navy)}
h4{font-size:1rem;font-weight:600;color:var(--navy)}
p{color:var(--gray-700);line-height:1.8}

.section-label{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--orange);background:rgba(249,115,22,.1);padding:4px 12px;border-radius:20px;margin-bottom:12px}
.section-title{margin-bottom:12px}
.section-sub{color:var(--gray-500);font-size:.95rem;margin-bottom:40px;max-width:540px}
.text-center{text-align:center}
.text-center .section-sub{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn-primary,.btn-outline,.btn-lg,.btn-cta-header{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 24px;border-radius:8px;font-weight:700;font-size:.95rem;transition:all .2s;white-space:nowrap}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 4px 14px rgba(249,115,22,.35)}
.btn-primary:hover{background:var(--orange-dk);transform:translateY(-1px);box-shadow:0 6px 20px rgba(249,115,22,.4)}
.btn-outline{background:transparent;color:var(--navy);border:2px solid var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-lg{padding:16px 32px;font-size:1.05rem;border-radius:10px}
.btn-cta-header{background:var(--orange);color:#fff;padding:8px 18px;font-size:.85rem;border-radius:6px}
.btn-cta-header:hover{background:var(--orange-dk)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--gray-200);box-shadow:0 2px 12px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-size:1.25rem;font-weight:800;color:var(--navy-dark);flex-shrink:0}
.logo-en{color:var(--navy)}
.logo-kr{color:var(--orange)}
.gnb ul{display:none;gap:4px}
.gnb a{font-size:.88rem;font-weight:500;color:var(--gray-700);padding:6px 10px;border-radius:6px;transition:.15s}
.gnb a:hover,.gnb a.active{color:var(--navy);background:var(--gray-100)}
.nav-toggle{display:flex;flex-direction:column;gap:5px;padding:6px;border-radius:6px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--navy);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Mobile nav open */
.gnb.open{position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--gray-200);padding:16px 20px;box-shadow:0 8px 24px rgba(0,0,0,.1)}
.gnb.open ul{display:flex;flex-direction:column;gap:0}
.gnb.open a{display:block;padding:12px 8px;border-bottom:1px solid var(--gray-100);font-size:.95rem}

/* ---------- Breadcrumb ---------- */
.breadcrumb{background:var(--gray-50);border-bottom:1px solid var(--gray-200);padding:10px 0}
.breadcrumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:4px;font-size:.8rem;color:var(--gray-500)}
.breadcrumb li+li::before{content:'/';margin-right:4px}
.breadcrumb a{color:var(--gray-500)}
.breadcrumb a:hover{color:var(--navy)}
.breadcrumb [aria-current]{color:var(--navy);font-weight:600}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,var(--navy-dark) 0%,var(--navy) 60%,var(--navy-light) 100%);color:#fff;padding:72px 0 80px;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");pointer-events:none}
.hero-content{position:relative;z-index:1;max-width:680px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.9);font-size:.8rem;font-weight:600;padding:5px 14px;border-radius:20px;margin-bottom:20px;letter-spacing:.04em}
.hero h1{color:#fff;margin-bottom:16px}
.hero h1 span{color:#fbbf24}
.hero-desc{font-size:1.05rem;color:rgba(255,255,255,.82);margin-bottom:32px;line-height:1.75}
.hero-buttons{display:flex;flex-wrap:wrap;gap:12px}
.hero-btn-primary{background:var(--orange);color:#fff;padding:15px 28px;border-radius:10px;font-weight:700;font-size:1rem;display:inline-flex;align-items:center;gap:8px;box-shadow:0 4px 20px rgba(249,115,22,.4);transition:.2s}
.hero-btn-primary:hover{background:var(--orange-dk);transform:translateY(-2px)}
.hero-btn-secondary{background:rgba(255,255,255,.1);color:#fff;border:2px solid rgba(255,255,255,.3);padding:15px 28px;border-radius:10px;font-weight:600;font-size:1rem;display:inline-flex;align-items:center;gap:8px;transition:.2s}
.hero-btn-secondary:hover{background:rgba(255,255,255,.2)}
.hero-trust{margin-top:40px;display:flex;flex-wrap:wrap;gap:20px}
.hero-trust-item{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.75);font-size:.85rem}
.hero-trust-item span{font-size:1rem}

/* ---------- Section spacing ---------- */
section{padding:64px 0}
.section-alt{background:var(--gray-50)}

/* ---------- Cards ---------- */
.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 24px;transition:.2s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.card-icon{font-size:2rem;margin-bottom:12px}
.card h3{margin-bottom:8px}
.card p{font-size:.9rem;color:var(--gray-500)}

/* ---------- Grid layouts ---------- */
.grid-2{display:grid;gap:20px;grid-template-columns:1fr}
.grid-3{display:grid;gap:20px;grid-template-columns:1fr}
.grid-4{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}

/* ---------- Trust Strip ---------- */
.trust-strip{background:var(--navy-dark);color:#fff;padding:24px 0}
.trust-items{display:flex;flex-wrap:wrap;justify-content:center;gap:24px 40px}
.trust-item{display:flex;align-items:center;gap:10px}
.trust-icon{font-size:1.4rem}
.trust-text strong{display:block;font-size:1.1rem;font-weight:800;color:#fbbf24}
.trust-text span{font-size:.78rem;color:rgba(255,255,255,.65)}

/* ---------- Steps ---------- */
.steps{display:grid;gap:0;counter-reset:step}
.step-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--gray-200)}
.step-item:last-child{border-bottom:none}
.step-num{width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem;flex-shrink:0;margin-top:2px}
.step-body h3{margin-bottom:6px}
.step-body p{font-size:.9rem}

/* ---------- Testimonials ---------- */
.review-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;border-left:4px solid var(--orange)}
.review-card p{font-size:.9rem;line-height:1.75;margin-bottom:12px;color:var(--gray-700)}
.review-meta{display:flex;align-items:center;gap:10px}
.review-avatar{width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700}
.review-name{font-size:.82rem;font-weight:700;color:var(--navy)}
.review-tag{font-size:.75rem;color:var(--gray-500)}
.review-stars{color:#f59e0b;font-size:.85rem;margin-bottom:8px}

/* ---------- Program Banner Cards ---------- */
.prog-card{display:block;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-light) 100%);color:#fff;border-radius:var(--radius);padding:32px 28px;position:relative;overflow:hidden;transition:.2s}
.prog-card::after{content:'→';position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:1.8rem;opacity:.3;transition:.2s}
.prog-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.prog-card:hover::after{opacity:.7;right:18px}
.prog-card-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:rgba(255,255,255,.6);margin-bottom:8px}
.prog-card h3{color:#fff;font-size:1.4rem;margin-bottom:8px}
.prog-card p{color:rgba(255,255,255,.75);font-size:.88rem}
.prog-card-2{background:linear-gradient(135deg,#1a4a3a 0%,#1e6b4a 100%)}

/* ---------- Why list ---------- */
.why-list{display:grid;gap:16px}
.why-item{display:flex;gap:16px;align-items:flex-start;background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.why-icon{width:48px;height:48px;border-radius:10px;background:rgba(249,115,22,.1);display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0}
.why-body h3{font-size:1rem;margin-bottom:4px}
.why-body p{font-size:.875rem;color:var(--gray-500)}

/* ---------- Keyword cloud ---------- */
.keyword-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.keyword-tag{font-size:.8rem;background:var(--gray-100);color:var(--gray-700);padding:4px 12px;border-radius:20px;border:1px solid var(--gray-200)}

/* ---------- Info Box ---------- */
.info-box{background:var(--gray-50);border-radius:var(--radius);padding:24px;border:1px solid var(--gray-200)}
.info-box h3{margin-bottom:12px;font-size:1rem}
.info-row{display:flex;gap:12px;padding:8px 0;border-bottom:1px solid var(--gray-200);font-size:.9rem}
.info-row:last-child{border-bottom:none}
.info-label{color:var(--gray-500);width:80px;flex-shrink:0;font-weight:500}
.info-val{color:var(--gray-700);flex:1}

/* ---------- CTA Section ---------- */
.cta-section{background:linear-gradient(135deg,var(--navy-dark),var(--navy));color:#fff;padding:72px 0;text-align:center}
.cta-section h2{color:#fff;margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,.75);margin-bottom:32px}
.cta-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.cta-buttons .btn-outline{border-color:rgba(255,255,255,.5);color:#fff}
.cta-buttons .btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-dark);color:rgba(255,255,255,.7);padding:48px 0 0}
.footer-grid{display:grid;gap:32px;margin-bottom:40px}
.footer-logo{font-size:1.2rem;color:#fff;margin-bottom:8px}
.footer-phone a{color:#fbbf24;font-weight:700;font-size:1rem}
.footer-nav ul{display:flex;flex-direction:column;gap:8px}
.footer-nav a{font-size:.88rem;transition:.15s}
.footer-nav a:hover{color:#fff}
.footer-cta-box{display:flex;flex-direction:column;gap:8px}
.footer-cta-box p{color:#fff;font-weight:600;margin-bottom:4px}
.footer-cta-box .btn-primary{justify-content:center}
.footer-cta-box .btn-outline{border-color:rgba(255,255,255,.3);color:rgba(255,255,255,.8);justify-content:center;padding:10px 20px;border-radius:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:.78rem;color:rgba(255,255,255,.4);text-align:center}

/* ---------- Floating CTA ---------- */
.float-cta{position:fixed;bottom:20px;right:16px;z-index:200;display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.float-btn{display:flex;align-items:center;gap:6px;padding:12px 18px;border-radius:28px;font-weight:700;font-size:.88rem;box-shadow:0 4px 20px rgba(0,0,0,.2);transition:.2s}
.float-btn:hover{transform:translateY(-2px)}
.float-btn-call{background:var(--navy);color:#fff}
.float-btn-form{background:var(--orange);color:#fff}

/* ---------- Page header ---------- */
.page-hero{background:linear-gradient(135deg,var(--navy-dark),var(--navy));color:#fff;padding:48px 0 56px;text-align:center}
.page-hero h1{color:#fff;font-size:clamp(1.5rem,4vw,2.2rem);margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.75);font-size:.95rem}

/* ========================================
   RESPONSIVE — Tablet (640px+)
   ======================================== */
@media(min-width:640px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}

/* ========================================
   RESPONSIVE — Desktop (1024px+)
   ======================================== */
@media(min-width:1024px){
  .gnb ul{display:flex}
  .nav-toggle{display:none}
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
  .footer-grid{grid-template-columns:2fr 1fr 1.5fr}
  .steps{grid-template-columns:1fr;max-width:640px}
  .why-list{grid-template-columns:repeat(2,1fr)}
  .hero{padding:96px 0 104px}
  .float-cta{bottom:32px;right:28px}
}

/* ---------- Utilities ---------- */
.mb-8{margin-bottom:8px}
.mb-12{margin-bottom:12px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-40{margin-bottom:40px}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.gap-top{padding-top:20px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}