:root {
  --cyan: #3CB4F0;
  --cyan-soft: #7FD0F7;
  --blue: #1E5AC8;
  --blue-deep: #1545A0;
  --navy: #0E2A5C;
  --navy-ink: #08183A;
  --ink: #0A1530;
  --muted: #5A6986;
  --line: #E4E9F2;
  --line-strong: #CCD4E3;
  --bg: #FAFBFD;
  --bg-tint: #F1F5FB;
  --white: #FFFFFF;
  --green: #16C47F;
  --green-deep: #0F8A53;
  --grad: linear-gradient(135deg, #3CB4F0 0%, #1E5AC8 55%, #0E2A5C 100%);
  --shadow-card: 0 1px 2px rgba(8,24,58,0.04), 0 8px 24px -8px rgba(8,24,58,0.10);
  --shadow-lg: 0 2px 4px rgba(8,24,58,0.05), 0 24px 48px -16px rgba(8,24,58,0.18);
  --radius: 14px;
  --radius-lg: 22px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-weight: 450;
  color: var(--ink);
  background: var(--white);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11';
}
h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--navy-ink);
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.06;
  font-weight: 600;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
.mono { font-family: 'JetBrains Mono', monospace; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.78);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(228,233,242,0.6);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 38px; width: auto; display: block; }
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a { font-size: 14px; font-weight: 500; color: #2A3551; transition: color .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--blue); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--navy-ink); color: var(--white);
  padding: 10px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 500;
  transition: transform .15s, background .15s;
}
.nav-cta:hover { background: var(--blue); }
.nav-cta svg { width: 14px; height: 14px; }
.nav-burger {
  display: none; width: 44px; height: 44px;
  border: 1px solid var(--line); background: var(--white);
  border-radius: 12px; cursor: pointer; padding: 0;
  align-items: center; justify-content: center; transition: border-color .15s;
}
.nav-burger:hover { border-color: var(--blue); }
.nav-burger span { display: block; position: relative; width: 18px; height: 2px; background: var(--navy-ink); border-radius: 2px; transition: transform .25s, opacity .15s; }
.nav-burger span::before, .nav-burger span::after { content: ''; position: absolute; left: 0; width: 18px; height: 2px; background: var(--navy-ink); border-radius: 2px; transition: transform .25s, top .25s; }
.nav-burger span::before { top: -6px; }
.nav-burger span::after { top: 6px; }
body.menu-open .nav-burger span { background: transparent; }
body.menu-open .nav-burger span::before { top: 0; transform: rotate(45deg); }
body.menu-open .nav-burger span::after { top: 0; transform: rotate(-45deg); }
.nav-drawer {
  position: fixed; top: 72px; left: 0; right: 0;
  background: var(--white); border-bottom: 1px solid var(--line);
  box-shadow: 0 16px 32px -16px rgba(8,24,58,0.18);
  padding: 24px; transform: translateY(-100%);
  opacity: 0; visibility: hidden;
  transition: transform .3s ease, opacity .25s, visibility .3s; z-index: 49;
}
body.menu-open .nav-drawer { transform: translateY(0); opacity: 1; visibility: visible; }
.nav-drawer a { display: block; padding: 14px 4px; font-size: 17px; font-weight: 500; color: var(--navy-ink); border-bottom: 1px solid var(--line); font-family: 'Space Grotesk', sans-serif; }
.nav-drawer a:last-of-type { border-bottom: 0; }
.nav-drawer .drawer-cta { display: flex; align-items: center; justify-content: center; gap: 8px; background: var(--navy-ink); color: var(--white); padding: 14px 22px; border-radius: 999px; margin-top: 20px; font-family: 'Inter', sans-serif; border-bottom: 0; }

/* ===== HERO ===== */
.cert-hero {
  position: relative; overflow: hidden;
  padding: 84px 0 96px;
  background:
    radial-gradient(ellipse 800px 480px at 88% -10%, rgba(60,180,240,0.14), transparent 70%),
    radial-gradient(ellipse 620px 420px at 6% 110%, rgba(30,90,200,0.10), transparent 70%),
    var(--white);
}
.cert-hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 72px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px 6px 8px; background: var(--white);
  border: 1px solid var(--line); border-radius: 999px;
  font-size: 12.5px; font-weight: 500; color: #3B4866; box-shadow: var(--shadow-card);
}
.eyebrow .dot { width: 18px; height: 18px; background: var(--grad); border-radius: 999px; position: relative; }
.eyebrow .dot::after { content: ''; position: absolute; inset: 4px; background: var(--white); border-radius: 999px; }
h1.cert-title { font-size: clamp(40px, 5vw, 64px); margin-top: 24px; letter-spacing: -0.035em; font-weight: 600; }
h1.cert-title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cert-sub { margin-top: 24px; font-size: 18px; line-height: 1.55; color: var(--muted); max-width: 540px; }
.cert-cta { margin-top: 34px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--navy-ink); color: var(--white);
  padding: 14px 22px; border-radius: 999px; font-size: 15px; font-weight: 500;
  transition: transform .15s, background .15s; box-shadow: 0 6px 16px -4px rgba(30,90,200,0.35);
}
.btn-primary:hover { background: var(--blue); transform: translateY(-1px); }
.btn-primary svg { width: 16px; height: 16px; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px; color: var(--navy-ink);
  padding: 14px 18px; border-radius: 999px; font-size: 15px; font-weight: 500;
  border: 1px solid var(--line-strong); background: var(--white);
  transition: border-color .15s, color .15s;
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-ghost svg { width: 16px; height: 16px; }

/* Hero badge: 1 día */
.hero-visual { position: relative; display: flex; justify-content: center; }
.day-badge {
  background: linear-gradient(160deg, #0E2A5C 0%, #08183A 100%);
  border: 1px solid rgba(60,180,240,0.22);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 36px 38px; width: 100%; max-width: 440px; color: #fff; position: relative; overflow: hidden;
}
.day-badge::before {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 20%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 20%, #000 20%, transparent 75%);
  pointer-events: none;
}
.day-badge .db-eye {
  position: relative; font-family: 'JetBrains Mono', monospace; font-size: 11.5px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan-soft);
  display: flex; align-items: center; gap: 9px;
}
.day-badge .db-eye .live { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px rgba(22,196,127,0.2); }
.day-badge .db-num { position: relative; font-family: 'Space Grotesk', sans-serif; font-size: 80px; font-weight: 600; letter-spacing: -0.04em; line-height: 1; margin-top: 14px; }
.day-badge .db-num small { font-size: 30px; color: var(--cyan-soft); margin-left: 8px; }
.day-badge .db-text { position: relative; color: rgba(255,255,255,0.78); font-size: 14.5px; margin-top: 16px; line-height: 1.5; }
.day-badge .db-note { position: relative; font-family: 'JetBrains Mono', monospace; font-size: 11px; color: rgba(255,255,255,0.5); margin-top: 14px; }
.day-badge .db-checks { position: relative; margin-top: 22px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.12); display: grid; gap: 10px; }
.day-badge .db-checks .ck { display: flex; align-items: center; gap: 10px; font-size: 13px; color: rgba(255,255,255,0.88); }
.day-badge .db-checks .ck svg { width: 16px; height: 16px; color: var(--green); flex-shrink: 0; }

/* ===== SECTION SHELL ===== */
section { padding: 104px 0; position: relative; }
.sec-header { max-width: 760px; margin-bottom: 56px; }
.sec-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-tag {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--blue);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 18px;
  display: flex; align-items: center; gap: 10px;
}
.sec-header.center .sec-tag { justify-content: center; }
.sec-tag::before { content: ''; width: 24px; height: 1px; background: var(--blue); }
.sec-header.center .sec-tag::after { content: ''; width: 24px; height: 1px; background: var(--blue); }
.sec-title { font-size: clamp(32px, 3.6vw, 48px); letter-spacing: -0.03em; }
.sec-sub { color: var(--muted); font-size: 17px; margin-top: 20px; max-width: 640px; line-height: 1.55; }
.sec-header.center .sec-sub { margin-left: auto; margin-right: auto; }

/* ===== STEPS (etapas) ===== */
.steps { background: var(--bg); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 26px 28px; position: relative;
  transition: transform .25s, box-shadow .25s, border-color .25s; display: flex; flex-direction: column;
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(60,180,240,0.4); }
.step-head { display: flex; align-items: center; justify-content: space-between; }
.step-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: var(--grad); color: #fff; box-shadow: 0 8px 18px -6px rgba(30,90,200,0.5); }
.step-icon svg { width: 24px; height: 24px; }
.step-n { font-family: 'JetBrains Mono', monospace; font-size: 32px; font-weight: 600; color: var(--bg-tint); -webkit-text-stroke: 1px var(--line-strong); }
.step-card h3 { font-size: 20px; font-weight: 600; margin-top: 22px; }
.step-card > p { color: var(--muted); font-size: 14px; line-height: 1.55; margin-top: 10px; }
.step-valida { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--blue); letter-spacing: 0.06em; text-transform: uppercase; margin-top: 20px; }
.step-list { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 9px; }
.step-list li { display: flex; gap: 9px; align-items: flex-start; font-size: 13px; color: #3B4866; line-height: 1.4; }
.step-list li svg { width: 15px; height: 15px; color: var(--green); flex-shrink: 0; margin-top: 1px; }
.steps-flow-note { margin-top: 28px; display: flex; align-items: center; gap: 12px; font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--muted); }
.steps-flow-note svg { width: 18px; height: 18px; color: var(--blue); }

/* ===== RESULT ===== */
.result-card {
  background: linear-gradient(160deg, #0E2A5C 0%, #08183A 100%);
  border-radius: 26px; padding: 56px 56px; color: #fff; position: relative; overflow: hidden;
  display: grid; grid-template-columns: auto 1fr; gap: 40px; align-items: center;
}
.result-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 460px 240px at 12% 20%, rgba(60,180,240,0.2), transparent 60%), radial-gradient(ellipse 400px 220px at 95% 95%, rgba(30,90,200,0.25), transparent 60%);
  pointer-events: none;
}
.result-seal {
  position: relative; width: 120px; height: 120px; border-radius: 28px;
  background: rgba(22,196,127,0.12); border: 1px solid rgba(22,196,127,0.4);
  display: grid; place-items: center; color: var(--green); flex-shrink: 0;
}
.result-seal svg { width: 56px; height: 56px; }
.result-body { position: relative; }
.result-body .rb-eye { font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan-soft); }
.result-body h3 { color: #fff; font-size: clamp(26px, 3vw, 36px); margin-top: 12px; }
.result-body p { color: rgba(255,255,255,0.8); font-size: 16px; margin-top: 14px; line-height: 1.55; max-width: 620px; }
.result-body p strong { color: #fff; font-weight: 600; }
.result-body .rb-tag { display: inline-flex; align-items: center; gap: 9px; margin-top: 22px; background: rgba(22,196,127,0.14); border: 1px solid rgba(22,196,127,0.4); color: #8ff0c4; padding: 9px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 500; }
.result-body .rb-tag svg { width: 16px; height: 16px; }

/* ===== SETS ===== */
.sets { background: var(--bg); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sets-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.set-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 28px; transition: transform .25s, box-shadow .25s, border-color .25s; position: relative; overflow: hidden;
}
.set-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(60,180,240,0.4); }
.set-card .set-top { display: flex; align-items: center; gap: 14px; }
.set-card .set-ico { width: 48px; height: 48px; border-radius: 13px; background: var(--bg-tint); border: 1px solid var(--line); color: var(--blue); display: grid; place-items: center; flex-shrink: 0; }
.set-card .set-ico svg { width: 23px; height: 23px; }
.set-card h4 { font-size: 19px; font-weight: 600; }
.set-card .set-kind { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-top: 2px; }
.set-card .set-list { list-style: none; padding: 0; margin: 20px 0 0; border-top: 1px dashed var(--line); padding-top: 16px; display: grid; gap: 9px; }
.set-card .set-list li { display: flex; gap: 9px; align-items: center; font-size: 13.5px; color: #3B4866; }
.set-card .set-list li::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan); flex-shrink: 0; }
.set-card.feature { background: linear-gradient(160deg, #1545A0 0%, #0E2A5C 100%); border-color: transparent; color: #fff; }
.set-card.feature h4 { color: #fff; }
.set-card.feature .set-kind { color: var(--cyan-soft); }
.set-card.feature .set-ico { background: rgba(60,180,240,0.15); border-color: rgba(60,180,240,0.3); color: var(--cyan-soft); }
.set-card.feature .set-list { border-top-color: rgba(255,255,255,0.14); }
.set-card.feature .set-list li { color: rgba(255,255,255,0.85); }
.set-card.feature .set-list li::before { background: var(--cyan-soft); }

/* ===== REQUISITOS ===== */
.req-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.req-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.req-list li { display: flex; gap: 14px; align-items: flex-start; }
.req-list li .rq-ico { width: 36px; height: 36px; border-radius: 11px; background: var(--bg-tint); border: 1px solid var(--line); color: var(--blue); display: grid; place-items: center; flex-shrink: 0; }
.req-list li .rq-ico svg { width: 18px; height: 18px; }
.req-list li .rq-text strong { display: block; font-family: 'Space Grotesk', sans-serif; font-weight: 600; color: var(--navy-ink); font-size: 15.5px; }
.req-list li .rq-text span { color: var(--muted); font-size: 14px; }
.req-note {
  background: var(--bg); border: 1px solid var(--line); border-left: 4px solid var(--cyan);
  border-radius: var(--radius); padding: 24px 26px;
}
.req-note .rn-eye { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--blue); letter-spacing: 0.1em; text-transform: uppercase; }
.req-note h4 { font-size: 19px; margin-top: 10px; }
.req-note p { color: var(--muted); font-size: 14.5px; margin-top: 10px; line-height: 1.55; }
.req-note p strong { color: var(--navy-ink); font-weight: 600; }

/* ===== FAQ ===== */
.faq { background: var(--bg); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: border-color .2s, box-shadow .2s; }
.faq-item[open] { border-color: rgba(60,180,240,0.4); box-shadow: var(--shadow-card); }
.faq-item summary { list-style: none; cursor: pointer; padding: 22px 26px; display: flex; align-items: center; justify-content: space-between; gap: 18px; font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 17px; color: var(--navy-ink); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-plus { width: 26px; height: 26px; flex-shrink: 0; position: relative; }
.faq-item summary .faq-plus::before, .faq-item summary .faq-plus::after { content: ''; position: absolute; background: var(--blue); border-radius: 2px; transition: transform .25s, opacity .2s; }
.faq-item summary .faq-plus::before { top: 12px; left: 4px; width: 18px; height: 2px; }
.faq-item summary .faq-plus::after { top: 4px; left: 12px; width: 2px; height: 18px; }
.faq-item[open] summary .faq-plus::after { transform: rotate(90deg); opacity: 0; }
.faq-item .faq-a { padding: 0 26px 24px; color: var(--muted); font-size: 15px; line-height: 1.6; }
.faq-item .faq-a strong { color: var(--navy-ink); font-weight: 600; }
@media (max-width: 720px) {
  .faq-item summary { padding: 18px 20px; font-size: 15.5px; }
  .faq-item .faq-a { padding: 0 20px 20px; font-size: 14.5px; }
}

/* ===== CTA planes ===== */
.cta { padding: 0; }
.cta-card { background: var(--grad); border-radius: 28px; padding: 64px 60px; color: var(--white); position: relative; overflow: hidden; margin: 104px 0; }
.cta-card::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse 600px 300px at 20% 30%, rgba(255,255,255,0.15), transparent 60%), radial-gradient(ellipse 400px 200px at 90% 80%, rgba(14,42,92,0.4), transparent 60%); pointer-events: none; }
.cta-inner { position: relative; display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center; }
.cta-card h2 { color: #fff; font-size: clamp(32px, 4vw, 48px); letter-spacing: -0.03em; }
.cta-card p { color: rgba(255,255,255,0.88); margin-top: 18px; font-size: 17px; line-height: 1.55; max-width: 480px; }
.cta-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.cta-btns .btn-primary { background: #fff; color: var(--navy-ink); box-shadow: none; }
.cta-btns .btn-primary:hover { background: var(--navy-ink); color: #fff; }
.cta-btns .btn-line { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.4); color: #fff; font-size: 15px; font-weight: 500; transition: background .15s; }
.cta-btns .btn-line:hover { background: rgba(255,255,255,0.1); }
.cta-btns .btn-line svg { width: 16px; height: 16px; }
.cta-stats { display: flex; flex-direction: column; gap: 16px; }
.cta-stat { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.18); backdrop-filter: blur(8px); border-radius: 16px; padding: 18px 22px; display: flex; align-items: center; gap: 16px; }
.cta-stat .num { font-family: 'Space Grotesk', sans-serif; font-size: 26px; font-weight: 600; color: #fff; letter-spacing: -0.02em; min-width: 78px; }
.cta-stat .lbl { font-size: 13.5px; color: rgba(255,255,255,0.82); line-height: 1.4; }

/* ===== FOOTER ===== */
footer { padding: 64px 0 36px; border-top: 1px solid var(--line); background: var(--white); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand img { height: 44px; }
.foot-brand p { color: var(--muted); font-size: 13.5px; margin-top: 18px; line-height: 1.6; max-width: 280px; }
.foot-col h5 { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500; margin: 0 0 18px; }
.foot-col a { display: block; font-size: 14px; color: #2A3551; margin-bottom: 12px; transition: color .15s; }
.foot-col a:hover { color: var(--blue); }
.foot-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--muted); flex-wrap: wrap; gap: 16px; }
.foot-bottom .legal { display: flex; gap: 24px; }

/* ===== WHATSAPP FLOAT ===== */
.wa-float { position: fixed; bottom: 24px; right: 24px; z-index: 60; display: flex; align-items: center; gap: 12px; background: #25D366; color: #fff; padding: 14px 20px 14px 16px; border-radius: 999px; font-weight: 500; font-size: 14.5px; box-shadow: 0 8px 24px -6px rgba(37,211,102,0.5), 0 4px 12px rgba(8,24,58,0.15); transition: transform .2s, box-shadow .2s; }
.wa-float:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 12px 28px -6px rgba(37,211,102,0.6), 0 6px 16px rgba(8,24,58,0.2); }
.wa-float .wa-icon { width: 26px; height: 26px; flex-shrink: 0; }
.wa-float .wa-pulse { position: absolute; inset: 0; border-radius: 999px; border: 2px solid #25D366; animation: wa-pulse 2.4s ease-out infinite; pointer-events: none; }
@keyframes wa-pulse { 0% { opacity: 0.6; transform: scale(1); } 100% { opacity: 0; transform: scale(1.25); } }

/* ===== RESPONSIVE ===== */
@media (max-width: 980px) {
  .container { padding: 0 28px; }
  .cert-hero { padding: 64px 0 80px; }
  .cert-hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { justify-content: flex-start; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .sets-grid { grid-template-columns: 1fr 1fr; }
  .req-grid, .cta-inner { grid-template-columns: 1fr; gap: 40px; }
  .result-card { grid-template-columns: 1fr; gap: 28px; text-align: left; }
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: inline-flex; }
  section { padding: 80px 0; }
  .cta-card { padding: 52px 40px; margin: 80px 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 720px) {
  .container { padding: 0 20px; }
  body { font-size: 15.5px; }
  .nav-inner { height: 64px; }
  .nav-drawer { top: 64px; }
  .brand img { height: 32px; }
  .cert-hero { padding: 44px 0 56px; }
  h1.cert-title { font-size: clamp(32px, 9vw, 42px); }
  .cert-sub { font-size: 16px; }
  .cert-cta { flex-direction: column; align-items: stretch; }
  .cert-cta .btn-primary, .cert-cta .btn-ghost { justify-content: center; }
  .day-badge { padding: 28px 26px; }
  .day-badge .db-num { font-size: 64px; }
  section { padding: 60px 0; }
  .sec-header { margin-bottom: 36px; }
  .sec-title { font-size: clamp(26px, 7vw, 34px); }
  .steps-grid, .sets-grid { grid-template-columns: 1fr; gap: 16px; }
  .result-card { padding: 36px 28px; }
  .result-seal { width: 92px; height: 92px; }
  .result-seal svg { width: 44px; height: 44px; }
  .cta-card { padding: 40px 26px; margin: 60px 0; border-radius: 22px; }
  .cta-card h2 { font-size: 30px; }
  .cta-btns { flex-direction: column; align-items: stretch; }
  .cta-btns .btn-primary, .cta-btns .btn-line { justify-content: center; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
  .wa-float { bottom: 18px; right: 18px; padding: 14px; }
  .wa-float .wa-label { display: none; }
  .wa-float .wa-icon { width: 28px; height: 28px; }
}