/* ============================================================================
   Sentinel — product micro-site theme
   Canonical palette from the extension's brand + promo art:
     deep navy bg · orange accent (#F2992E) · shield-blue (#3B82F6) · green=safe
   Self-contained: styles the standalone Sentinel pages only. NOT shared with the
   main GKS stylesheet. No oversized animated layers (GPU-texture lesson) —
   reveals are opacity/translate on small elements only.
   NB: the var names --mint/--purple are kept from the shared component structure
   but repointed to Sentinel's accent (orange) and shield-blue.
   ============================================================================ */

:root {
  --bg:        #0A1530;
  --bg-2:      #0C1A38;
  --elevated:  #111F40;
  --card:      #122146;
  --card-2:    #16294F;
  --line:      rgba(244, 247, 252, 0.09);
  --line-2:    rgba(244, 247, 252, 0.16);

  --fg:        #F4F7FC;
  --muted:     #AEBAD0;
  --muted-2:   #8093B0;
  --faint:     #5E7099;

  --mint:      #F2992E;   /* primary accent — orange */
  --mint-soft: #E0830F;
  --purple:    #3B82F6;   /* secondary — shield blue */
  --hot:       #34D399;   /* "safe / private" green */
  --gold:      #FFB84D;

  --grad:      linear-gradient(120deg, var(--purple) 0%, var(--mint) 100%);  /* blue→orange */
  --grad-soft: linear-gradient(135deg, rgba(242,153,46,0.14), rgba(59,130,246,0.10));

  --radius:    16px;
  --radius-sm: 11px;
  --shell:     1280px;   /* matches the main GKS site container */

  --ease:      cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 92px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 70% 55% at 50% -8%, rgba(242,153,46,0.10), transparent 60%),
    radial-gradient(ellipse 60% 50% at 92% 8%, rgba(59,130,246,0.10), transparent 55%);
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }   /* height:auto kills the stretch from width/height attrs */
::selection { background: rgba(242,153,46,0.28); color: #fff; }

/* Same width as the main GKS site: min(1280px, 100% - 2rem) */
.shell { width: min(var(--shell), calc(100% - 2rem)); margin-inline: auto; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

h1, h2, h3 { font-family: 'Space Grotesk', 'Inter', sans-serif; letter-spacing: -0.02em; line-height: 1.08; font-weight: 600; }

/* ── Eyebrow / pill ───────────────────────────────────────────────────────── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 11.5px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 600;
  color: var(--muted); padding: 7px 15px; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(255,255,255,0.025);
}
.eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 15px;
  padding: 13px 24px; border-radius: 12px; cursor: pointer;
  border: 1px solid transparent; transition: transform .2s var(--ease), box-shadow .25s var(--ease), background .2s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn img { width: 18px; height: 18px; display: block; }
.icon-link { display: inline-flex; align-items: center; gap: 8px; }
.icon-link img { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(135deg, #F4A23C, #E0760F); color: #fff;
  box-shadow: 0 8px 26px -10px rgba(242,153,46,0.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -10px rgba(242,153,46,0.7); }
.btn-ghost {
  background: rgba(255,255,255,0.03); color: var(--fg); border-color: var(--line-2);
}
.btn-ghost:hover { background: rgba(255,255,255,0.07); border-color: var(--mint); }

/* ── Header — premium floating pill (dark, glassy, always-on) ─────────────── */
.site-header {
  position: sticky; top: 0; z-index: 60; padding: 16px 0;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  height: 72px; padding: 0 14px 0 22px; border-radius: 999px;
  background: linear-gradient(180deg, rgba(18,33,70,0.88), rgba(10,21,48,0.84));
  border: 1px solid var(--line-2);
  -webkit-backdrop-filter: saturate(170%) blur(18px); backdrop-filter: saturate(170%) blur(18px);
  box-shadow: 0 8px 30px -14px rgba(0,0,0,0.7);
  transition: box-shadow .35s var(--ease), border-color .35s;
}
.site-header.is-scrolled .header-inner {
  border-color: rgba(242,153,46,0.28);
  box-shadow: 0 14px 44px -16px rgba(0,0,0,0.85), 0 0 0 1px rgba(242,153,46,0.06) inset;
}
.brand { display: flex; align-items: center; gap: 13px; }
.brand-mark { width: 40px; height: 40px; object-fit: contain; filter: drop-shadow(0 3px 8px rgba(0,0,0,0.45)); }
.brand-name { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 21px; letter-spacing: -0.01em; }
.brand-name b { font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a { font-size: 16px; font-weight: 500; color: var(--muted); transition: color .2s; position: relative; }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px; border-radius: 2px; background: var(--grad); transition: right .25s var(--ease); }
.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after { right: 0; }
.header-cta { display: flex; align-items: center; gap: 12px; }
.header-cta .btn { font-size: 15px; padding: 12px 22px; }
.nav-toggle { display: none; background: none; border: 0; color: var(--fg); cursor: pointer; padding: 8px; }

/* ── Sections ─────────────────────────────────────────────────────────────── */
section { position: relative; }
.section-pad { padding: clamp(64px, 9vw, 120px) 0; }
.section-head { max-width: 720px; margin: 0 auto clamp(40px, 6vw, 64px); text-align: center; }
.section-head .eyebrow { margin-bottom: 20px; }
.section-head h2 { font-size: clamp(2rem, 4.4vw, 3.1rem); margin-bottom: 16px; }
.section-head p { color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.18rem); max-width: 56ch; margin: 0 auto; }

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(40px, 6vw, 72px); text-align: center; }
.hero .eyebrow { margin-bottom: 26px; }
.hero h1 { font-size: clamp(2.6rem, 6.4vw, 5rem); margin-bottom: 24px; font-weight: 600; }
.hero p.lede { font-size: clamp(1.08rem, 1.7vw, 1.35rem); color: var(--muted); max-width: 60ch; margin: 0 auto 36px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 18px; }
.hero-note { font-size: 13px; color: var(--muted-2); display: inline-flex; gap: 8px; align-items: center; }
.hero-note b { color: var(--mint); font-weight: 600; }

.hero-shot {
  margin: clamp(44px, 6vw, 72px) auto 0; max-width: 980px; position: relative;
  border-radius: 20px; overflow: hidden; border: 1px solid var(--line-2);
  box-shadow: 0 40px 120px -40px rgba(0,0,0,0.9), 0 0 0 1px rgba(255,255,255,0.02) inset;
}
.hero-shot::after { content: ''; position: absolute; inset: 0; border-radius: 20px; box-shadow: 0 0 90px -20px rgba(242,153,46,0.35) inset; pointer-events: none; }
.hero-shot img { width: 100%; }

/* ── Pillars / trust strip ────────────────────────────────────────────────── */
.pillars { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.pillar {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 20px; border-radius: 999px; border: 1px solid var(--line-2);
  background: rgba(255,255,255,0.025); font-size: 13.5px; font-weight: 500; color: var(--muted);
  letter-spacing: 0.02em;
}
.pillar svg { width: 17px; height: 17px; color: var(--mint); }

/* ── Feature grid ─────────────────────────────────────────────────────────── */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  padding: 28px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card), var(--bg-2));
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--line-2); box-shadow: 0 24px 48px -24px rgba(0,0,0,0.7); }
.feature-ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--line-2); margin-bottom: 18px; color: var(--mint);
}
.feature-ico svg { width: 23px; height: 23px; }
.feature-card h3 { font-size: 1.25rem; margin-bottom: 9px; }
.feature-card p { color: var(--muted); font-size: 1.02rem; }
.feature-card .tag { display: inline-block; margin-top: 14px; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mint); font-weight: 600; }

/* tabs feature (Hunt/Coach/Brain/Ask AI) */
.tab-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tab-card { padding: 26px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); transition: border-color .3s, transform .3s var(--ease); }
.tab-card:hover { transform: translateY(-4px); border-color: var(--mint); }
.tab-card .kicker { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.05rem; margin-bottom: 8px; color: var(--fg); }
.tab-card .kicker span { display: block; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mint); font-weight: 600; margin-bottom: 6px; }
.tab-card p { color: var(--muted); font-size: 1rem; }

/* ── Split feature (image + text) ─────────────────────────────────────────── */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 5vw, 72px); align-items: center; }
.split.reverse .split-media { order: 2; }
.split-text .eyebrow { margin-bottom: 18px; }
.split-text h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom: 18px; }
.split-text p { color: var(--muted); font-size: 1.06rem; margin-bottom: 14px; }
.split-text ul { list-style: none; margin-top: 22px; display: grid; gap: 13px; }
.split-text ul li { position: relative; padding-left: 30px; color: var(--muted); font-size: 0.98rem; }
.split-text ul li::before {
  content: ''; position: absolute; left: 0; top: 3px; width: 19px; height: 19px; border-radius: 50%;
  background: var(--grad-soft); border: 1px solid var(--mint);
}
.split-text ul li::after { content: '\2713'; position: absolute; left: 5px; top: 2px; color: var(--mint); font-size: 11px; font-weight: 700; }
.split-media { position: relative; border-radius: 18px; overflow: hidden; border: 1px solid var(--line-2); box-shadow: 0 36px 90px -42px rgba(0,0,0,0.9); }
.split-media img { width: 100%; }

/* ── Steps ────────────────────────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step { padding: 26px 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); position: relative; }
.step .num {
  font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 14px;
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--grad); color: #fff; margin-bottom: 16px;
}
.step h3 { font-size: 1.06rem; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 0.9rem; }

/* ── Scoring table ────────────────────────────────────────────────────────── */
.score-wrap { max-width: 760px; margin: 0 auto; border-radius: var(--radius); border: 1px solid var(--line-2); overflow: hidden; background: var(--card); }
.score-row { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; padding: 20px 26px; border-bottom: 1px solid var(--line); }
.score-row:last-child { border-bottom: 0; }
.score-row .label { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 1.02rem; }
.score-row .desc { color: var(--muted-2); font-size: 0.88rem; margin-top: 2px; }
.score-row .pts { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.5rem; color: var(--mint); min-width: 56px; text-align: right; }
.score-foot { padding: 18px 26px; display: flex; justify-content: space-between; align-items: center; background: var(--grad-soft); }
.score-foot .label { font-family: 'Space Grotesk', sans-serif; font-weight: 700; }
.score-foot .pts { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.7rem; }

/* ── Requirements ─────────────────────────────────────────────────────────── */
.req-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.req { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); text-align: center; }
.req .big { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.7rem; margin-bottom: 6px; }
.req .big.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.req p { color: var(--muted); font-size: 0.9rem; }

/* ── FAQ ──────────────────────────────────────────────────────────────────── */
.faq-list { max-width: 760px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--card); overflow: hidden; }
.faq-q { width: 100%; text-align: left; background: none; border: 0; color: var(--fg); cursor: pointer;
  font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 1.05rem; padding: 20px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-q .chev { color: var(--mint); transition: transform .25s var(--ease); flex-shrink: 0; }
.faq-item[data-open="true"] .faq-q .chev { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a-inner { padding: 0 24px 22px; color: var(--muted); font-size: 0.98rem; }
.faq-item[data-open="true"] .faq-a { max-height: 320px; }

/* ── CTA band ─────────────────────────────────────────────────────────────── */
.cta-band { text-align: center; padding: clamp(56px, 8vw, 96px) 0; }
.cta-inner {
  max-width: 820px; margin: 0 auto; padding: clamp(40px, 6vw, 70px) 32px; border-radius: 28px;
  border: 1px solid var(--line-2);
  background: radial-gradient(ellipse 80% 120% at 50% 0%, rgba(242,153,46,0.16), transparent 60%), var(--elevated);
  position: relative; overflow: hidden;
}
.cta-inner h2 { font-size: clamp(2rem, 4.2vw, 3rem); margin-bottom: 16px; }
.cta-inner p { color: var(--muted); font-size: 1.1rem; max-width: 50ch; margin: 0 auto 30px; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); padding: 56px 0 40px; }
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 40px; }
.footer-brand { max-width: 320px; }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { color: var(--muted-2); font-size: 0.92rem; }
.footer-cols { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col h4 { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-bottom: 16px; font-weight: 600; }
.footer-col a { display: block; color: var(--muted); font-size: 0.94rem; margin-bottom: 11px; transition: color .2s; }
.footer-col a:hover { color: var(--mint); }
/* A button inside the footer must keep its button styling, not the link color */
.footer-col a.btn { display: inline-flex; margin-bottom: 0; }
.footer-col a.btn-primary, .footer-col a.btn-primary:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 28px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted-2); }
.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--mint); }

/* ── Legal / privacy long-form ────────────────────────────────────────────── */
.legal { max-width: 840px; margin: 0 auto; }
.legal-hero { padding: clamp(48px, 7vw, 84px) 0 clamp(28px, 4vw, 44px); }
.legal-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 18px 0; }
.legal-hero .lede { color: var(--muted); font-size: 1.1rem; max-width: 62ch; }
.legal-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; font-size: 13px; color: var(--muted-2); margin-top: 24px; }
.legal-meta .pill { padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,0.02); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600; color: var(--muted); }
.legal-banner { display: flex; gap: 16px; align-items: flex-start; padding: 22px 24px; margin: 36px 0; border: 1px solid rgba(242,153,46,0.3); border-radius: 16px; background: var(--grad-soft); }
.legal-banner .ico { font-size: 22px; }
.legal-banner strong { display: block; color: var(--mint); font-family: 'Space Grotesk', sans-serif; margin-bottom: 5px; }
.legal-banner p { color: var(--muted); font-size: 0.95rem; }
.legal h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin: 52px 0 14px; scroll-margin-top: 90px; }
.legal h3 { font-size: 1.18rem; color: var(--mint); margin: 28px 0 10px; }
.legal p { color: var(--muted); margin-bottom: 14px; }
.legal p strong { color: var(--fg); }
.legal a { color: var(--mint); border-bottom: 1px solid rgba(242,153,46,0.35); }
.legal a:hover { border-color: var(--mint); }
.legal ul { padding-left: 0; list-style: none; margin-bottom: 16px; display: grid; gap: 9px; }
.legal ul li { position: relative; padding-left: 26px; color: var(--muted); }
.legal ul li strong { color: var(--fg); }
.legal ul.check li::before { content: '\2713'; position: absolute; left: 0; color: var(--mint); font-weight: 700; }
.legal ul.cross li::before { content: '\2715'; position: absolute; left: 0; color: var(--hot); font-weight: 700; }
.legal code { font-family: 'JetBrains Mono', 'SF Mono', Menlo, monospace; font-size: 0.85em; padding: 1px 7px; border: 1px solid var(--line); border-radius: 5px; background: rgba(255,255,255,0.03); color: var(--gold); }
.legal .table-wrap { margin: 16px 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.legal table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 520px; }
.legal thead th { text-align: left; padding: 13px 16px; font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line-2); background: rgba(255,255,255,0.02); }
.legal tbody td { padding: 13px 16px; vertical-align: top; color: var(--muted); border-bottom: 1px solid var(--line); }
.legal tbody td:first-child { color: var(--fg); font-weight: 500; white-space: nowrap; }
.legal tbody tr:last-child td { border-bottom: 0; }
.legal .callout { padding: 24px; border: 1px solid var(--line-2); border-radius: 16px; background: var(--card); margin: 16px 0; }
.legal .callout p:last-child { margin-bottom: 0; }

/* ── Team page ────────────────────────────────────────────────────────────── */
.team-hero { text-align: center; padding: clamp(56px, 8vw, 100px) 0 clamp(32px, 4vw, 56px); }
.team-hero h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); margin: 22px 0 18px; }
.team-hero p { color: var(--muted); font-size: 1.15rem; max-width: 64ch; margin: 0 auto; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.maker-card { max-width: 560px; margin: 0 auto; padding: 36px; border-radius: 22px; border: 1px solid var(--line-2); background: var(--grad-soft); text-align: center; }
.maker-avatar { width: 84px; height: 84px; border-radius: 22px; margin: 0 auto 20px; background: var(--grad); display: grid; place-items: center; font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 2rem; color: #fff; }
.maker-card h3 { font-size: 1.5rem; margin-bottom: 6px; }
.maker-card .role { color: var(--mint); font-weight: 600; font-size: 0.95rem; margin-bottom: 16px; }
.maker-card p { color: var(--muted); }
.maker-card .links { display: flex; gap: 12px; justify-content: center; margin-top: 22px; flex-wrap: wrap; }

/* ── Reveal animation (small elements only — safe for GPU) ────────────────── */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 980px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .tab-row { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
}
@media (max-width: 760px) {
  .nav-links, .header-cta .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-links.is-open {
    display: flex; position: fixed; top: 96px; left: 16px; right: 16px; flex-direction: column;
    gap: 0; background: var(--elevated); border: 1px solid var(--line-2); border-radius: 18px;
    padding: 8px 22px 16px; box-shadow: 0 20px 50px -16px rgba(0,0,0,0.8); z-index: 60;
  }
  .nav-links.is-open a { padding: 15px 0; font-size: 17px; border-bottom: 1px solid var(--line); }
  .nav-links.is-open a:last-child { border-bottom: 0; }
  .nav-links.is-open a::after { display: none; }
}
@media (max-width: 560px) {
  .feature-grid, .tab-row, .steps, .req-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
}