/* ─────────────────────────────────────────────────────────────────────────────
   IFA Number Platform — styles.css
   The IFA Internet · CENProject · toe.cenproject.org/ifa-number/
───────────────────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #050810;
  --bg2:       #07101f;
  --bg3:       #0b1528;
  --card:      rgba(255,255,255,0.035);
  --card-h:    rgba(255,255,255,0.065);
  --br:        rgba(255,255,255,0.08);
  --br-glow:   rgba(240,146,12,0.28);
  --t1:        #eef1fb;
  --t2:        #8892aa;
  --t3:        #505869;
  --amber:     #f0920c;
  --amber-dim: rgba(240,146,12,0.15);
  --cyan:      #14b8d4;
  --cyan-dim:  rgba(20,184,212,0.12);
  --indigo:    #6366f1;
  --indigo-dim:rgba(99,102,241,0.12);
  --green:     #4caf50;
  --green-dim: rgba(76,175,80,0.12);
  --purple:    #8b5cf6;
  --purple-dim:rgba(139,92,246,0.12);
  --pink:      #ec4899;
  --pink-dim:  rgba(236,72,153,0.12);
  --yellow:    #fbbf24;
  --ff:        'Inter', system-ui, -apple-system, sans-serif;
  --fm:        'Space Mono', 'Courier New', monospace;
}

html  { scroll-behavior: smooth; }
body  { background: var(--bg); color: var(--t1); font-family: var(--ff); line-height: 1.65; overflow-x: hidden; }
a     { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { font-weight: 700; }
em { font-style: italic; }

/* ── Nav ──────────────────────────────────────────────────────────────────── */
.ifn-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5,8,16,0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--br);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 52px;
}
.ifn-nav__logo { font-family: var(--fm); font-size: 0.85rem; color: var(--amber); letter-spacing: 0.06em; font-weight: 700; }
.ifn-nav__logo span { opacity: 0.55; font-weight: 400; }
.ifn-nav__links { display: flex; gap: 0.2rem; flex-wrap: wrap; }
.ifn-nav__link {
  font-size: 0.72rem; font-weight: 500; padding: 4px 10px; border-radius: 4px;
  color: var(--t2); transition: color 0.15s, background 0.15s; letter-spacing: 0.02em;
}
.ifn-nav__link:hover { color: var(--t1); background: var(--card-h); text-decoration: none; }
.ifn-nav__link--ap { color: var(--cyan); border: 1px solid rgba(20,184,212,0.3); }
.ifn-nav__link--ap:hover { background: var(--cyan-dim); color: var(--cyan); }

/* ── Shared section ────────────────────────────────────────────────────────── */
.ifn-section {
  max-width: 1080px; margin: 0 auto;
  padding: 80px 2rem;
}
.ifn-section--wide { max-width: 1200px; }
.ifn-section--full { max-width: none; padding: 80px 2rem; }

.ifn-eyebrow {
  font-family: var(--fm); font-size: 0.7rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--amber); margin-bottom: 14px;
}
.ifn-section-title {
  font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800;
  line-height: 1.15; margin-bottom: 16px; color: var(--t1);
}
.ifn-section-sub {
  font-size: 1.05rem; color: var(--t2); max-width: 680px; margin-bottom: 40px;
}
.ifn-divider {
  border: none; border-top: 1px solid var(--br);
  margin: 0 2rem;
}

/* ── Hero ──────────────────────────────────────────────────────────────────── */
.ifn-hero {
  position: relative; min-height: 92vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 120px 2rem 80px;
  max-width: 1080px; margin: 0 auto;
  overflow: hidden;
}
.ifn-hero__glow-a {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 30% 40%, rgba(240,146,12,0.09) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 75% 60%, rgba(99,102,241,0.07) 0%, transparent 70%);
}
.ifn-hero__eyebrow {
  font-family: var(--fm); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--amber); margin-bottom: 20px; opacity: 0.85;
}
.ifn-hero__title {
  font-size: clamp(3rem, 8vw, 6rem); font-weight: 900;
  line-height: 1.0; letter-spacing: -0.03em; margin-bottom: 8px;
}
.ifn-hero__title-main {
  background: linear-gradient(135deg, #f0920c 0%, #fbbf24 45%, #14b8d4 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.ifn-hero__title-sym {
  display: inline-block; font-size: 0.55em;
  color: var(--amber); -webkit-text-fill-color: var(--amber);
  vertical-align: super; margin-left: 6px; opacity: 0.7;
  font-family: var(--fm);
}
.ifn-hero__subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem); font-weight: 300;
  color: var(--t2); margin-bottom: 24px; letter-spacing: 0.01em;
}
.ifn-hero__subtitle strong { color: var(--t1); font-weight: 700; }
.ifn-hero__body {
  font-size: 1.05rem; color: var(--t2); max-width: 620px;
  margin-bottom: 28px; line-height: 1.75;
}
.ifn-hero__numoetag {
  display: inline-flex; align-items: baseline; flex-wrap: wrap;
  gap: 0 10px;
  margin-bottom: 36px;
  padding: 12px 20px;
  background: linear-gradient(90deg, rgba(240,146,12,0.09) 0%, rgba(99,102,241,0.07) 100%);
  border: 1px solid rgba(240,146,12,0.28);
  border-left: 3px solid var(--amber);
  border-radius: 8px;
  max-width: 620px;
}
.ifn-hero__numoetag-abbr {
  font-size: 1rem; font-weight: 800;
  color: var(--amber); letter-spacing: 0.04em;
}
.ifn-hero__numoetag-sep {
  font-size: 0.85rem; color: var(--t3);
}
.ifn-hero__numoetag-full {
  font-size: 0.9rem; color: var(--t1);
  font-style: italic; line-height: 1.5;
}
.ifn-hero__numoetag-uioe {
  font-size: 0.82rem; font-weight: 700;
  color: var(--t2); letter-spacing: 0.05em;
  white-space: nowrap;
}
.ifn-hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 56px; }
.ifn-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px; border-radius: 6px; font-size: 0.88rem;
  font-weight: 600; transition: all 0.15s; cursor: pointer; border: none;
  font-family: var(--ff); letter-spacing: 0.02em;
}
.ifn-btn--primary {
  background: var(--amber); color: #000;
}
.ifn-btn--primary:hover { background: #ffaa2a; text-decoration: none; color: #000; }
.ifn-btn--ghost {
  background: transparent; color: var(--cyan);
  border: 1px solid rgba(20,184,212,0.4);
}
.ifn-btn--ghost:hover { background: var(--cyan-dim); text-decoration: none; color: var(--cyan); }
.ifn-btn--sm { padding: 7px 16px; font-size: 0.8rem; }

.ifn-hero__eq-box {
  display: inline-block;
  background: var(--bg3); border: 1px solid var(--br-glow);
  border-radius: 10px; padding: 18px 28px;
  font-family: var(--fm); font-size: clamp(0.72rem, 1.5vw, 0.92rem);
  color: var(--t1); letter-spacing: 0.01em; line-height: 1.9;
}
.ifn-hero__eq-box .eq-label {
  font-size: 0.65rem; color: var(--t3); text-transform: uppercase;
  letter-spacing: 0.12em; display: block; margin-bottom: 8px;
}
.eq-sym   { color: var(--amber); font-weight: 700; }
.eq-set   { color: var(--cyan); }
.eq-def   { color: var(--t2); font-size: 0.85em; vertical-align: super; }
.eq-cen   { color: var(--yellow); font-weight: 700; }
.eq-frac  { color: var(--green); }

/* ── Number Types grid ────────────────────────────────────────────────────── */
.ifn-types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px; margin-top: 32px;
}
.ifn-type-card {
  background: var(--card); border: 1px solid var(--br);
  border-radius: 10px; padding: 18px 16px;
  transition: background 0.15s, border-color 0.15s;
}
.ifn-type-card:hover { background: var(--card-h); }
.ifn-type-card__sym {
  font-family: var(--fm); font-size: 1.4rem; font-weight: 700;
  margin-bottom: 8px;
}
.ifn-type-card__name { font-size: 0.82rem; font-weight: 600; color: var(--t1); margin-bottom: 4px; }
.ifn-type-card__analog { font-size: 0.72rem; color: var(--t3); margin-bottom: 6px; font-family: var(--fm); }
.ifn-type-card__desc { font-size: 0.78rem; color: var(--t2); line-height: 1.5; }

/* ── Formula block ────────────────────────────────────────────────────────── */
.ifn-formula {
  background: var(--bg3); border: 1px solid var(--br-glow);
  border-radius: 10px; padding: 24px 28px; margin: 28px 0;
  font-family: var(--fm); font-size: 1rem; line-height: 2;
  overflow-x: auto;
}
.ifn-formula__label {
  font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--t3); margin-bottom: 10px; display: block; font-family: var(--ff);
}

/* ── IFA Pair ─────────────────────────────────────────────────────────────── */
.ifn-pair-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px;
}
@media (max-width: 640px) { .ifn-pair-grid { grid-template-columns: 1fr; } }
.ifn-pair-card {
  border-radius: 14px; padding: 32px 28px;
  border: 1px solid var(--br);
  position: relative; overflow: hidden;
}
.ifn-pair-card--num  { background: linear-gradient(135deg, rgba(240,146,12,0.1), rgba(240,146,12,0.03)); border-color: rgba(240,146,12,0.25); }
.ifn-pair-card--nom  { background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(99,102,241,0.03)); border-color: rgba(99,102,241,0.25); }
.ifn-pair-card__sym  { font-size: 3rem; font-family: var(--fm); font-weight: 700; margin-bottom: 12px; line-height: 1; }
.ifn-pair-card__label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 14px; }
.ifn-pair-card__title { font-size: 1.3rem; font-weight: 700; margin-bottom: 10px; }
.ifn-pair-card__body  { font-size: 0.88rem; color: var(--t2); line-height: 1.65; }

.ifn-pair-def {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; margin: 32px 0 8px; flex-wrap: wrap;
}
.ifn-pair-def__eq {
  font-family: var(--fm); font-size: clamp(1rem, 3vw, 1.35rem);
  background: var(--bg3); border: 1px solid var(--br);
  border-radius: 8px; padding: 14px 22px; color: var(--t1);
  text-align: center;
}

/* ── Construction ─────────────────────────────────────────────────────────── */
.ifn-construct-names {
  display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 32px;
}
.ifn-construct-names .tag {
  font-size: 0.75rem; padding: 4px 12px; border-radius: 20px;
  border: 1px solid var(--br); color: var(--t2); background: var(--card);
}
.ifn-construct-flow {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 32px;
}
@media (max-width: 640px) { .ifn-construct-flow { grid-template-columns: 1fr; } }
.ifn-construct-step {
  background: var(--card); border: 1px solid var(--br);
  border-radius: 12px; padding: 24px 20px; text-align: center;
  position: relative;
}
.ifn-construct-step__num {
  font-family: var(--fm); font-size: 0.65rem; color: var(--t3);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 10px;
}
.ifn-construct-step__sym { font-size: 2rem; margin-bottom: 10px; }
.ifn-construct-step__name { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.ifn-construct-step__body { font-size: 0.8rem; color: var(--t2); line-height: 1.55; }

/* ── IkaTech figure ──────────────────────────────────────────────────────── */
.ifn-ikatech-fig {
  margin: 48px 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}
.ifn-ikatech-frame {
  width: 100%;
  max-width: 820px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(240,146,12,0.28);
  box-shadow:
    0 0 0 1px rgba(240,146,12,0.07),
    0 0 40px 6px rgba(240,146,12,0.08),
    0 16px 60px rgba(0,0,0,0.55);
  position: relative;
}
.ifn-ikatech-frame::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(240,146,12,0.7) 50%, transparent 100%);
  z-index: 1;
}
.ifn-ikatech-img {
  width: 100%;
  display: block;
  filter: contrast(1.04) saturate(1.08) brightness(1.03);
}
.ifn-ikatech-caption {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--t3);
  font-style: italic;
  letter-spacing: 0.03em;
  text-align: center;
}

/* ── Infinity ─────────────────────────────────────────────────────────────── */
.ifn-inf-grid {
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px;
}
.ifn-inf-card {
  background: var(--card); border: 1px solid var(--br);
  border-radius: 10px; padding: 18px 20px; flex: 1; min-width: 200px;
  transition: background 0.15s;
}
.ifn-inf-card:hover { background: var(--card-h); }
.ifn-inf-card__sym  { font-size: 1.6rem; margin-bottom: 8px; font-family: var(--fm); }
.ifn-inf-card__name { font-size: 0.85rem; font-weight: 700; margin-bottom: 4px; }
.ifn-inf-card__note { font-size: 0.76rem; color: var(--t2); }

/* ── Energy banner ────────────────────────────────────────────────────────── */
.ifn-energy {
  background: linear-gradient(135deg, rgba(76,175,80,0.1) 0%, rgba(20,184,212,0.08) 50%, rgba(240,146,12,0.07) 100%);
  border-top: 1px solid rgba(76,175,80,0.2); border-bottom: 1px solid rgba(76,175,80,0.2);
  padding: 80px 2rem; text-align: center;
}
.ifn-energy__inner { max-width: 860px; margin: 0 auto; }
.ifn-energy__label {
  font-family: var(--fm); font-size: 0.7rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--green); margin-bottom: 20px;
}
.ifn-energy__principle {
  font-size: clamp(1.6rem, 4vw, 2.6rem); font-weight: 800;
  line-height: 1.2; margin-bottom: 20px;
  background: linear-gradient(90deg, var(--green) 0%, var(--cyan) 50%, var(--amber) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.ifn-energy__body { font-size: 1rem; color: var(--t2); max-width: 600px; margin: 0 auto; line-height: 1.75; }

/* ── Pair Production ──────────────────────────────────────────────────────── */
.ifn-prod-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px;
}
@media (max-width: 720px) { .ifn-prod-grid { grid-template-columns: 1fr; } }
.ifn-prod-card {
  border-radius: 12px; padding: 28px 24px; border: 1px solid var(--br);
}
.ifn-prod-card--ifa     { background: rgba(240,146,12,0.06); border-color: rgba(240,146,12,0.2); }
.ifn-prod-card--physics { background: rgba(20,184,212,0.06); border-color: rgba(20,184,212,0.2); }
.ifn-prod-card__label {
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.12em;
  font-family: var(--fm); margin-bottom: 14px;
}
.ifn-prod-card__title { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.ifn-prod-card__eq {
  font-family: var(--fm); font-size: 0.88rem;
  background: rgba(0,0,0,0.25); border-radius: 6px; padding: 10px 14px;
  margin: 14px 0; color: var(--t1); letter-spacing: 0.02em;
}
.ifn-prod-card__body { font-size: 0.82rem; color: var(--t2); line-height: 1.6; }

/* ── AP Playground card ──────────────────────────────────────────────────── */
.ifn-ap-section { padding: 80px 2rem; max-width: 1080px; margin: 0 auto; }
.ifn-ap-card {
  background: linear-gradient(135deg, rgba(20,184,212,0.1), rgba(139,92,246,0.07));
  border: 1px solid rgba(20,184,212,0.28); border-radius: 18px;
  padding: 48px 40px; position: relative; overflow: hidden;
}
.ifn-ap-card__glow {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 70% 60% at 80% 50%, rgba(20,184,212,0.07) 0%, transparent 70%);
}
.ifn-ap-card__eyebrow {
  font-family: var(--fm); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cyan); margin-bottom: 14px;
}
.ifn-ap-card__title { font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 800; margin-bottom: 14px; }
.ifn-ap-card__body  { font-size: 0.95rem; color: var(--t2); max-width: 580px; margin-bottom: 28px; line-height: 1.7; }
.ifn-ap-card__body p { margin: 0 0 16px; }
.ifn-ap-card__body p:last-child { margin-bottom: 0; }
.ifn-ap-card__stats { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 32px; }
.ifn-ap-card__stat  { display: flex; flex-direction: column; gap: 2px; }
.ifn-ap-card__stat-val { font-family: var(--fm); font-size: 1.5rem; font-weight: 700; color: var(--cyan); }
.ifn-ap-card__stat-label { font-size: 0.72rem; color: var(--t3); text-transform: uppercase; letter-spacing: 0.08em; }

/* ── AP preview pills ─────────────────────────────────────────────────────── */
.ifn-ap-preview { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.ifn-ap-pill {
  font-family: var(--fm); font-size: 0.72rem; padding: 3px 9px;
  border-radius: 4px; background: rgba(20,184,212,0.12);
  border: 1px solid rgba(20,184,212,0.25); color: var(--cyan);
}
.ifn-ap-pill--etc { color: var(--t3); background: var(--card); border-color: var(--br); }

/* ── Ika Meji section ─────────────────────────────────────────────────────── */
.ifn-ika-grid { display: grid; grid-template-columns: 1fr 240px; gap: 40px; align-items: start; }
@media (max-width: 720px) { .ifn-ika-grid { grid-template-columns: 1fr; } }

.ifn-ika-glyph-card {
  background: linear-gradient(160deg, #0d1124 0%, #0a0e1e 100%);
  border: 1px solid rgba(240,146,12,0.35);
  border-radius: 18px;
  padding: 28px 24px 24px;
  text-align: center;
  box-shadow:
    0 0 0 1px rgba(240,146,12,0.08),
    0 0 32px 4px rgba(240,146,12,0.10),
    0 8px 40px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
}
.ifn-ika-glyph-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(240,146,12,0.7), transparent);
}

.ifn-ika-glyph-label {
  font-size: 0.65rem; color: rgba(240,146,12,0.6);
  letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 22px;
}

.ifn-ika-glyph { margin-bottom: 22px; }

.ifn-ika-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-bottom: 10px;
}
.ifn-ika-row:last-child { margin-bottom: 0; }
.ifn-ika-arm {
  display: flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  min-width: 36px;
}

.ifn-ika-mark {
  display: inline-block;
  width: 13px;
  height: 38px;
  background: linear-gradient(180deg, #ffb83f 0%, #f0920c 55%, #c96d00 100%);
  border-radius: 50px;
  box-shadow:
    0 0 6px 2px rgba(240,146,12,0.55),
    0 0 18px 4px rgba(240,146,12,0.25),
    inset 0 1px 0 rgba(255,220,120,0.4);
}
.ifn-ika-mark--single {
  box-shadow:
    0 0 8px 3px rgba(240,146,12,0.65),
    0 0 24px 6px rgba(240,146,12,0.30),
    inset 0 1px 0 rgba(255,220,120,0.4);
}

.ifn-ika-glyph-name {
  font-size: 1.05rem; font-weight: 800; color: #fff;
  letter-spacing: 0.04em; margin-bottom: 6px;
}
.ifn-ika-glyph-sub {
  font-size: 0.75rem; color: rgba(240,146,12,0.55);
  letter-spacing: 0.06em; text-transform: uppercase;
}

/* ── Universe callout ─────────────────────────────────────────────────────── */
.ifn-universe-callout {
  background: var(--card); border: 1px solid var(--br);
  border-left: 3px solid var(--amber); border-radius: 0 10px 10px 0;
  padding: 18px 22px; margin: 24px 0; font-size: 0.92rem;
  color: var(--t1); line-height: 1.7;
}

/* ── Info list ────────────────────────────────────────────────────────────── */
.ifn-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin: 20px 0; }
.ifn-list li {
  padding: 12px 16px 12px 42px; position: relative;
  background: var(--card); border-radius: 8px; border: 1px solid var(--br);
  font-size: 0.88rem; color: var(--t2); line-height: 1.55;
}
.ifn-list li::before {
  content: attr(data-icon);
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  font-size: 1rem;
}

/* ── Footer ────────────────────────────────────────────────────────────────── */
.ifn-footer {
  border-top: 1px solid var(--br); padding: 28px 2rem;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; max-width: 1080px; margin: 0 auto;
}
.ifn-footer__copy { font-size: 0.75rem; color: var(--t3); }
.ifn-footer__links { display: flex; gap: 16px; }
.ifn-footer__links a { font-size: 0.75rem; color: var(--t3); }
.ifn-footer__links a:hover { color: var(--t2); }

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--br); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* ══ MOBILE ────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {

  /* Nav: logo row + scrollable links row */
  .ifn-nav {
    height: auto;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 1rem 6px;
    gap: 4px;
  }
  .ifn-nav__logo { font-size: 0.8rem; }
  .ifn-nav__links {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: 2px;
    padding-bottom: 2px;
  }
  .ifn-nav__links::-webkit-scrollbar { display: none; }
  .ifn-nav__link { white-space: nowrap; font-size: 0.66rem; padding: 3px 8px; }

  /* Hero */
  .ifn-hero {
    padding: 72px 1.25rem 48px;
    min-height: 0;
  }
  .ifn-hero__body { max-width: 100%; font-size: 0.97rem; }
  .ifn-hero__numoetag { max-width: 100%; padding: 10px 14px; }
  .ifn-hero__cta { flex-direction: column; gap: 10px; margin-bottom: 36px; }
  .ifn-hero__cta .ifn-btn { width: 100%; justify-content: center; }
  .ifn-hero__eq-box { display: block; padding: 12px 12px; }

  /* Sections */
  .ifn-section, .ifn-ap-section { padding: 52px 1.25rem; }
  .ifn-divider { margin: 0 1.25rem; }
  .ifn-section-sub { max-width: 100%; font-size: 0.95rem; margin-bottom: 28px; }
  .ifn-section-title { margin-bottom: 12px; }

  /* Universe callout */
  .ifn-universe-callout { padding: 14px 16px; font-size: 0.88rem; }

  /* Pair cards */
  .ifn-pair-card { padding: 22px 16px; }
  .ifn-pair-card__sym { font-size: 2.2rem; }
  .ifn-pair-card__title { font-size: 1.1rem; }

  /* Construct flow steps */
  .ifn-construct-step { padding: 18px 14px; }

  /* Prod cards */
  .ifn-prod-card { padding: 18px 14px; }
  .ifn-prod-card__eq { font-size: 0.78rem; padding: 8px 10px; word-break: break-word; }

  /* Types grid — 2 col on tablet, 1 col below 440px */
  .ifn-types-grid { grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 10px; }

  /* Infinity grid */
  .ifn-inf-card { min-width: 140px; padding: 14px 16px; }

  /* Energy banner */
  .ifn-energy { padding: 52px 1.25rem; }
  .ifn-energy__body { font-size: 0.92rem; }

  /* AP Playground card */
  .ifn-ap-card { padding: 28px 18px; }
  .ifn-ap-card__title { font-size: clamp(1.3rem, 5vw, 1.8rem); }
  .ifn-ap-card__body { max-width: 100%; font-size: 0.9rem; }
  .ifn-ap-card__stats { gap: 18px; }
}

@media (max-width: 440px) {
  .ifn-types-grid { grid-template-columns: 1fr 1fr; }
  .ifn-inf-card { min-width: calc(50% - 6px); }
  .ifn-hero { padding: 64px 1rem 40px; }
  .ifn-section, .ifn-ap-section { padding: 44px 1rem; }
  .ifn-divider { margin: 0 1rem; }
  .ifn-ika-glyph-card { padding: 22px 16px 18px; }
}