/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:    #1565C0;
  --sky:     #00AEEF;
  --gold:    #F5B700;
  --dark:    #0B1525;
  --mid:     #0E1D35;
  --card:    #142040;
  --border:  rgba(255,255,255,0.10);
  --text:    #FFFFFF;
  --muted:   #8A9BB8;
  --radius:  12px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Typography helpers ───────────────────────────────────── */
.gold  { color: var(--gold); }
.blue  { color: var(--sky); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.btn:hover { transform: translateY(-2px); opacity: 0.92; }
.btn:active { transform: translateY(0); }

.btn-gold {
  background: var(--gold);
  color: #080C14;
  box-shadow: 0 4px 20px rgba(245,183,0,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }
.btn-full { width: 100%; text-align: center; }

/* ── Nav ──────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background 0.3s, padding 0.3s, box-shadow 0.3s;
}
.nav.scrolled {
  background: rgba(11,21,37,0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 0;
  box-shadow: 0 2px 24px rgba(0,0,0,0.5), 0 1px 0 rgba(245,183,0,0.18);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo-img {
  height: 38px;
  width: auto;
  display: block;
}
.nav-logo-text {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.8rem;
  color: var(--text);
  letter-spacing: 0.04em;
}
.nav-logo-text span { color: var(--gold); }
.nav-cta { padding: 10px 24px; font-size: 0.875rem; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(ellipse at 65% 35%, rgba(0,174,239,0.22) 0%, transparent 55%),
              radial-gradient(ellipse at 15% 75%, rgba(245,183,0,0.13) 0%, transparent 45%),
              radial-gradient(ellipse at 50% 100%, rgba(21,101,192,0.15) 0%, transparent 50%),
              var(--dark);
  overflow: hidden;
  padding: 120px 0 80px;
}

/* Logo watermark behind hero content */
.hero-logo-watermark {
  position: absolute;
  right: 3%;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(300px, 38vw, 520px);
  opacity: 0.07;
  pointer-events: none;
  filter: grayscale(40%) brightness(1.4);
  z-index: 0;
}
.hero-logo-watermark img { width: 100%; height: auto; }
.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  width: 100%;
}

/* ── Hero left column ─── */
.hero-left {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: 18px;
}
.hero-headline {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.8rem, 6vw, 5.2rem);
  line-height: 1.0;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}
.hero-sub {
  max-width: 540px;
  margin-bottom: 36px;
  font-size: 1.05rem;
  color: #B0C4D8;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-product-row {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}
.hero-product-row img {
  width: clamp(100px, 14vw, 160px);
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.6));
  transition: transform 0.3s;
}
.hero-product-row img:hover { transform: scale(1.06) rotate(-2deg); }
.hero-product-row img:nth-child(2) { transform: scale(1.1); }
.hero-product-row img:nth-child(2):hover { transform: scale(1.16) rotate(2deg); }

/* ── Hero right column — the logo ─── */
.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-logo-main {
  width: clamp(260px, 32vw, 460px);
  filter: drop-shadow(0 24px 64px rgba(0,174,239,0.35))
          drop-shadow(0 8px 24px rgba(0,0,0,0.5));
  animation: hero-logo-float 5s ease-in-out infinite;
}
@keyframes hero-logo-float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

/* ── Responsive: stack on mobile ─── */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-left { align-items: center; }
  .hero-sub  { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-product-row { justify-content: center; }
  .hero-right { order: -1; }
  .hero-logo-main { width: clamp(180px, 55vw, 280px); }
}

/* ── Sections ─────────────────────────────────────────────── */
.section { padding: 100px 0; }
.section-dark { background: var(--dark); }
.section-mid  {
  background: linear-gradient(160deg, #0F2040 0%, var(--mid) 100%);
}
.section-waitlist {
  background: radial-gradient(ellipse at 50% 0%, rgba(245,183,0,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(0,174,239,0.08) 0%, transparent 50%),
              var(--dark);
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}
.section-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}
.section-desc {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 56px;
}

/* ── Problem ──────────────────────────────────────────────── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.problem-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
}
.problem-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}
.problem-card h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  color: var(--sky);
}
.problem-card p { color: var(--muted); line-height: 1.7; }
.problem-footnote {
  color: var(--muted);
  font-size: 0.95rem;
  border-left: 3px solid var(--gold);
  padding-left: 16px;
}

/* ── Solution ─────────────────────────────────────────────── */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 768px) { .solution-grid { grid-template-columns: 1fr; gap: 40px; } }

.solution-point {
  display: flex;
  gap: 20px;
  margin-bottom: 36px;
  align-items: flex-start;
}
.solution-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.5rem;
  color: var(--gold);
  line-height: 1;
  min-width: 48px;
  opacity: 0.7;
}
.solution-point h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.solution-point p { color: var(--muted); line-height: 1.7; font-size: 0.95rem; }

.size-dial {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 10px 16px;
  align-items: center;
}
.dial-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-align: right;
}
.dial-bar {
  height: 28px;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
.dial-caption {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  margin-top: 8px;
}

/* ── Product Grid ─────────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.product-card:hover {
  border-color: rgba(245,183,0,0.5);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(245,183,0,0.2);
}
.product-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: #0a0a0a;
}
.product-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-top: 1px solid var(--border);
}
.product-size {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  color: var(--text);
  min-width: 44px;
}
.product-color {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
}
.product-color-name {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.3;
}

/* ── Steps ────────────────────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
}
.step-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 3rem;
  color: var(--gold);
  opacity: 0.5;
  line-height: 1;
  margin-bottom: 12px;
}
.step-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card p { color: var(--muted); line-height: 1.7; font-size: 0.95rem; }

.teams-callout {
  background: rgba(245,183,0,0.08);
  border: 1px solid rgba(245,183,0,0.25);
  border-radius: var(--radius);
  padding: 24px 28px;
  color: #D4B200;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ── Who It's For ─────────────────────────────────────────── */
.who-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 64px;
  align-items: center;
}
@media (max-width: 900px) { .who-grid { grid-template-columns: 1fr; } .who-visual { display: none; } }

.who-list { margin-top: 32px; display: flex; flex-direction: column; gap: 20px; }
.who-item { display: flex; gap: 16px; align-items: flex-start; font-size: 0.95rem; color: var(--muted); line-height: 1.6; }
.who-item strong { color: var(--text); }
.who-check {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0,174,239,0.15);
  border: 1px solid var(--sky);
  color: var(--sky);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.who-visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
}
.who-visual img {
  width: 180px;
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.5));
  transition: transform 0.3s;
}
.who-visual img:hover { transform: scale(1.05); }

/* ── Waitlist ─────────────────────────────────────────────── */
.waitlist-inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.waitlist-sub {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 40px;
}
.waitlist-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 16px;
}
.waitlist-form input,
.waitlist-form select {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}
.waitlist-form input::placeholder { color: var(--muted); }
.waitlist-form select { color: var(--muted); cursor: pointer; }
.waitlist-form select option { background: #1A2035; color: var(--text); }
.waitlist-form input:focus,
.waitlist-form select:focus { border-color: var(--gold); }
.waitlist-note {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 12px;
}
.form-success {
  background: rgba(245,183,0,0.1);
  border: 1px solid rgba(245,183,0,0.3);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--gold);
  font-weight: 600;
  font-size: 1rem;
  margin-top: 16px;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: #050810;
  padding: 56px 0;
  border-top: 1px solid var(--border);
}
.footer-inner { text-align: center; }
.footer-logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2rem;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.footer-logo span { color: var(--gold); }
.footer-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.footer-legal {
  color: #3D4A5C;
  font-size: 0.78rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Data Callout (Problem section) ──────────────────────── */
.data-callout {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  margin-bottom: 20px;
}
.data-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 110px;
  text-align: center;
}
.data-stat.highlight .data-num { color: var(--gold); }
.data-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem;
  letter-spacing: 0.04em;
  color: var(--sky);
  line-height: 1;
}
.data-label {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}
.data-arrow {
  font-size: 1.4rem;
  color: var(--border);
  flex-shrink: 0;
}
.data-source {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
  border-left: 3px solid rgba(0,174,239,0.4);
  padding-left: 14px;
  margin-bottom: 40px;
}

/* ── Size Calculator ──────────────────────────────────────── */
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 16px;
}
@media (max-width: 768px) { .calc-wrapper { grid-template-columns: 1fr; } }

.calc-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}
.calc-inputs { display: flex; flex-direction: column; gap: 16px; }
.calc-field { display: flex; flex-direction: column; gap: 8px; }
.calc-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.calc-input-row { display: flex; gap: 10px; }
.calc-input-row input {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  outline: none;
  transition: border-color 0.2s;
}
.calc-input-row input:focus { border-color: var(--gold); }
.calc-input-row select {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 14px;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
}
.calc-result {
  margin-top: 20px;
  background: rgba(245,183,0,0.07);
  border: 1px solid rgba(245,183,0,0.25);
  border-radius: var(--radius);
  padding: 24px;
}
.calc-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.calc-diameter {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.6rem;
  color: var(--gold);
  letter-spacing: 0.04em;
  line-height: 1;
  margin-bottom: 8px;
}
.calc-model {
  font-size: 0.85rem;
  color: var(--sky);
  line-height: 1.5;
  margin-bottom: 12px;
}
.calc-note {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
}
.calc-info {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}
.calc-info h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.calc-info > p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.calc-anchors {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.calc-anchor-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}
.anchor-height { color: var(--muted); min-width: 160px; }
.anchor-hand   { font-size: 0.78em; color: #5A6E88; }
.anchor-arrow  { color: var(--border); }
.anchor-size   { font-weight: 700; }
.anchor-size.gold { color: var(--gold); }
.calc-caveat {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
  border-left: 3px solid rgba(245,183,0,0.3);
  padding-left: 12px;
  margin-bottom: 0 !important;
}

/* ── Calculator model image cards ────────────────────────── */
.calc-model-cards {
  display: flex;
  gap: 16px;
  margin: 16px 0 4px;
  flex-wrap: wrap;
}
.calc-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px 12px 12px;
  flex: 1;
  min-width: 200px;
  transition: border-color 0.2s;
}
.calc-card:hover { border-color: rgba(245,183,0,0.4); }
.calc-card img {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
  background: #0a0a0a;
}
.calc-card-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.calc-card-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}
.calc-card-size {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--text);
}
.calc-card-color {
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── Bonus Thumbless Calculator ───────────────────────────── */
.calc-bonus {
  margin-top: 48px;
  border: 1px solid rgba(0,174,239,0.25);
  border-radius: var(--radius);
  padding: 32px 28px;
  background: rgba(0,174,239,0.04);
}
.bonus-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}
.bonus-badge {
  display: inline-block;
  background: rgba(0,174,239,0.15);
  border: 1px solid rgba(0,174,239,0.4);
  color: var(--sky);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  width: fit-content;
}
.bonus-header h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--sky);
}
.bonus-header p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 680px;
}
.calc-bonus .calc-inputs {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}
.calc-bonus .calc-field { flex: 1; min-width: 200px; }
.calc-bonus .btn { white-space: nowrap; padding: 14px 28px; }
.calc-bonus .calc-result {
  margin-top: 20px;
  background: rgba(0,174,239,0.07);
  border-color: rgba(0,174,239,0.25);
}
.calc-bonus .calc-diameter { color: var(--sky); }

/* ── Footer Citations ─────────────────────────────────────── */
.footer-citations {
  max-width: 700px;
  margin: 0 auto 32px;
  text-align: left;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}
.citations-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.footer-citations p {
  font-size: 0.78rem;
  color: #3D4A5C;
  line-height: 1.6;
  margin-bottom: 8px;
}
.footer-citations em { font-style: italic; }
.footer-citations a { color: #4A6A8A; text-decoration: underline; }
.footer-citations a:hover { color: var(--sky); }

/* ── Fade-in animations ───────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
}