/* ===== Datum Consulting — styles ===== */
:root {
  --navy: #0B1F33;
  --navy-2: #13304D;
  --navy-3: #1B4368;
  --cyan: #00C2FF;
  --cyan-soft: #9FDFFF;
  --white: #FFFFFF;
  --text: #D6E2EE;
  --muted: #8FA7BF;
  --line: rgba(159, 223, 255, 0.14);
  --radius: 10px;
  --max: 1160px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  background: var(--navy);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--cyan); text-decoration: none; }
h1, h2, h3 { font-family: 'Montserrat', sans-serif; color: var(--white); line-height: 1.2; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.5px; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
p + p { margin-top: 1rem; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 780px; }
.center { text-align: center; }
.accent { color: var(--cyan); }

.eyebrow {
  font-family: 'Montserrat', sans-serif;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: .78rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: .8rem;
}
.lead, .section-lead { color: var(--text); font-size: 1.1rem; max-width: 640px; }
.section-lead { margin-top: 1rem; color: var(--muted); }
.center .section-lead, .section-head .section-lead { margin-left: auto; margin-right: auto; }

/* ===== buttons ===== */
.btn {
  display: inline-block;
  background: var(--cyan);
  color: var(--navy);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: .95rem;
  padding: .85rem 1.5rem;
  border: 2px solid var(--cyan);
  border-radius: 4px;
  transition: transform .2s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-2px); background: var(--white); border-color: var(--white); }
.btn-ghost { background: transparent; color: var(--white); border-color: var(--white); }
.btn-ghost:hover { background: var(--white); color: var(--navy); }
.btn-small { padding: .5rem 1rem; font-size: .85rem; }

/* ===== header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 31, 51, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { color: var(--white); }
.brand-logo { height: 44px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 1.8rem; }
.nav-links a:not(.btn) { color: var(--text); font-size: .95rem; font-weight: 500; }
.nav-links a:not(.btn):hover { color: var(--cyan); }
/* header layout: logo left, then links, language switch, (mobile) menu button */
.nav { gap: 1.4rem; }
.brand { margin-right: auto; }
.nav-toggle { order: 3; }
/* language switch with flags */
.lang-switch { display: flex; gap: 4px; padding: 3px; border: 1px solid var(--line); border-radius: 6px; }
.lang-switch button { display: flex; align-items: center; gap: 6px; background: none; border: 0; border-radius: 4px; padding: 5px 8px; cursor: pointer; color: var(--muted); font: 600 .78rem 'Inter', sans-serif; opacity: .6; transition: opacity .2s, background .2s, color .2s; }
.lang-switch button svg { width: 22px; height: 15px; border-radius: 2px; box-shadow: 0 0 0 1px rgba(255,255,255,.25); }
.lang-switch button:hover { opacity: 1; }
.lang-switch button[aria-pressed="true"] { opacity: 1; background: var(--navy-3); color: var(--white); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--white); margin: 5px 0; transition: .3s; }

/* ===== blueprint grid ===== */
.grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(rgba(159,223,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159,223,255,.05) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

/* ===== hero ===== */
.hero { position: relative; padding: 90px 0 100px; overflow: hidden; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; }
.hero-text h1 { margin-bottom: 1.3rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0 2.5rem; }
.hero-facts { list-style: none; display: flex; flex-wrap: wrap; gap: 2.2rem; border-top: 1px solid var(--line); padding-top: 1.5rem; }
.hero-facts strong { display: block; font-family: 'Montserrat', sans-serif; color: var(--white); font-size: 1.3rem; }
.hero-facts span { color: var(--muted); font-size: .88rem; }
.hero-art svg { width: 100%; filter: drop-shadow(0 30px 60px rgba(0, 194, 255, .15)); }

/* ===== sections ===== */
.section { position: relative; padding: 100px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 3.5rem; }

/* problems */
.problems { background: var(--navy-2); }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.problem { display: flex; gap: 1rem; align-items: flex-start; background: var(--navy); padding: 1.3rem; border-radius: var(--radius); border: 1px solid var(--line); }
.problem .x { color: #FF5C7A; font-weight: 700; flex-shrink: 0; }
.problem p { font-size: .98rem; }
.problem em { color: var(--cyan-soft); font-style: normal; font-family: monospace; font-size: .9em; }

/* cards */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card {
  position: relative;
  background: linear-gradient(180deg, var(--navy-2), rgba(19,48,77,.4));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.7rem;
  transition: transform .25s, border-color .25s;
}
/* hover: same lift + cyan border + glow on every service card (two-class selector overrides the slow .reveal transition) */
.card.visible { transition: transform .25s, border-color .25s, box-shadow .25s, background .25s; }
.card:hover { transform: translateY(-6px); border-color: var(--cyan); background: var(--navy-3); box-shadow: 0 0 0 1px var(--cyan) inset, 0 24px 60px rgba(0,194,255,.2); }
.card .card-icon { transition: background .25s; }
.card:hover .card-icon { background: rgba(0,194,255,.12); }
.card h3 { margin: 1.2rem 0 .7rem; }
.card p { color: var(--muted); font-size: .96rem; }
.card-icon { width: 54px; height: 54px; border: 1.5px solid var(--cyan); border-radius: 6px; display: grid; place-items: center; }
.card-icon svg { width: 30px; height: 30px; fill: none; stroke: var(--cyan); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
/* service tiers: core row (CAD wider) + smaller "also available" row */
.core-grid { grid-template-columns: 1.5fr 1fr 1fr; }
.card-main h3 { font-size: 1.4rem; }
.card-points { list-style: none; margin-top: 1rem; }
.card-points li { position: relative; padding-left: 1.3rem; margin-bottom: .4rem; font-size: .93rem; color: var(--text); }
.card-points li::before { content: ''; position: absolute; left: 0; top: .55em; width: 7px; height: 7px; background: var(--cyan); }
.also-head { margin: 3rem 0 1.2rem; }
.card-small { padding: 1.5rem 1.4rem; }
.card-small .card-icon { width: 42px; height: 42px; }
.card-small .card-icon svg { width: 24px; height: 24px; }
.card-small h3 { font-size: 1.02rem; margin: .9rem 0 .5rem; }
.card-small p { font-size: .9rem; }
.card-link { display: inline-block; margin-top: 1rem; font-weight: 600; font-size: .95rem; }
.tag { position: absolute; top: 1.6rem; right: 1.5rem; background: var(--cyan); color: var(--navy); font-size: .72rem; font-weight: 700; padding: .2rem .6rem; border-radius: 3px; text-transform: uppercase; letter-spacing: 1px; }

/* split layouts */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split-top { align-items: start; }
.audit { background: var(--navy-2); }
.checklist { list-style: none; margin: 1.8rem 0; }
.checklist li { position: relative; padding-left: 2rem; margin-bottom: .7rem; }
.checklist li::before { content: ''; position: absolute; left: 0; top: .45em; width: 0; height: 0; border-left: 12px solid var(--cyan); border-top: 7px solid transparent; border-bottom: 7px solid transparent; }
.note { color: var(--muted); font-size: .92rem; margin-bottom: 1.8rem; }

/* report mock */
.report { background: var(--navy); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; box-shadow: 0 30px 60px rgba(0,0,0,.35); }
.report-head { display: flex; justify-content: space-between; align-items: center; font-family: 'Montserrat', sans-serif; color: var(--white); font-weight: 700; padding-bottom: 1rem; border-bottom: 1px solid var(--line); margin-bottom: 1.3rem; }
.pill { font-size: .72rem; background: var(--navy-3); color: var(--cyan); padding: .2rem .6rem; border-radius: 20px; }
.score-row { display: grid; grid-template-columns: 1.2fr 1.3fr 32px; gap: .8rem; align-items: center; font-size: .88rem; margin-bottom: .8rem; }
.bar { height: 8px; background: var(--navy-3); border-radius: 4px; overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--cyan-soft)); border-radius: 4px; }
.score-row b { color: var(--white); text-align: right; }
.report-list { margin-top: 1.5rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.rl-title { color: var(--white); font-weight: 600; margin-bottom: .6rem; }
.report-list p { font-size: .9rem; margin-top: .4rem; display: flex; align-items: center; gap: .6rem; }
.dot { width: 8px; height: 8px; background: var(--cyan); border-radius: 50%; flex-shrink: 0; }
.report-foot { margin-top: 1.4rem !important; color: var(--muted); font-size: .75rem; text-align: right; }

/* steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; counter-reset: s; }
.step { position: relative; padding: 2rem 1.5rem; border-top: 2px solid var(--cyan); background: var(--navy-2); border-radius: 0 0 var(--radius) var(--radius); }
/* flow arrows between the process steps */
.steps { gap: 2.8rem; }
.step:not(:last-child)::after { content: '→'; position: absolute; top: 50%; right: -2.25rem; transform: translateY(-50%); width: 1.7rem; height: 1.7rem; display: grid; place-items: center; border-radius: 50%; background: var(--cyan); color: var(--navy); font-weight: 800; font-size: 1rem; line-height: 1; box-shadow: 0 0 18px rgba(0,194,255,.45); }
.step-num { display: grid; place-items: center; width: 44px; height: 44px; border: 2px solid var(--white); font-family: 'Montserrat', sans-serif; font-weight: 800; color: var(--white); margin-bottom: 1.2rem; }
.step h3 { margin-bottom: .6rem; }
.step p { color: var(--muted); font-size: .95rem; }

/* expertise */
.expertise { background: var(--navy-2); }
.sub { margin-bottom: 1.3rem; font-size: 1.05rem; text-transform: uppercase; letter-spacing: 2px; color: var(--cyan-soft); }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .6rem; }
.chips li { border: 1px solid var(--line); background: var(--navy); color: var(--white); padding: .5rem 1rem; border-radius: 4px; font-size: .92rem; font-weight: 500; }
.chips .chip-ai { border-color: rgba(0,194,255,.5); color: var(--cyan); }
/* mind map */
.mindmap { position: relative; display: grid; grid-template-columns: 1fr 230px 1fr; gap: 90px; align-items: center; }
.mm-lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.mm-lines path { fill: none; stroke: var(--cyan); stroke-opacity: .55; stroke-width: 1.6; transition: stroke-opacity .25s, stroke-width .25s; }
.mm-lines path.on { stroke-opacity: 1; stroke-width: 2.5; }
.mm-lines circle { fill: var(--cyan); }
/* draw-in animation only when the visitor allows motion; otherwise the lines are simply shown */
@media (prefers-reduced-motion: no-preference) {
  .mm-lines path { stroke-dashoffset: var(--len); }
  .mindmap.visible .mm-lines path { animation: mm-draw 1.2s ease forwards; }
}
@keyframes mm-draw { from { stroke-dashoffset: var(--len); } to { stroke-dashoffset: 0; } }
.mm-col { position: relative; display: flex; flex-direction: column; gap: 1.1rem; }
.mm-label { font-family: 'Montserrat', sans-serif; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--cyan-soft); }
.mm-right .mm-label { text-align: left; }
.mm-node { position: relative; background: var(--navy); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; transition: border-color .25s, transform .25s; }
.mm-node:hover, .mm-node.on { border-color: var(--cyan); transform: translateY(-2px); }
.mm-node b { display: block; color: var(--white); font-family: 'Montserrat', sans-serif; margin-bottom: .5rem; }
.mm-node span { color: var(--muted); font-size: .9rem; }
.mm-node .chips { gap: .4rem; }
.mm-node .chips li { padding: .25rem .6rem; font-size: .82rem; background: var(--navy-2); }
.mm-hub { position: relative; z-index: 1; aspect-ratio: 1; display: grid; place-items: center; border-radius: 50%; background: radial-gradient(circle, var(--navy-3), var(--navy)); border: 2px solid var(--cyan); box-shadow: 0 0 0 10px rgba(0,194,255,.06), 0 0 60px rgba(0,194,255,.25); padding: 34px; }
.mm-hub::after { content: ''; position: absolute; inset: -2px; border-radius: 50%; border: 2px solid var(--cyan); animation: mm-pulse 2.8s ease-out infinite; }
@keyframes mm-pulse { from { transform: scale(1); opacity: .6; } to { transform: scale(1.35); opacity: 0; } }
.mm-hub img { width: 100%; }
@media (prefers-reduced-motion: reduce) { .mm-hub::after { animation: none; } }
.audience { margin-top: 4rem; }
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.audience-grid > div { background: var(--navy); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; }
.aud-icon { font-size: 1.6rem; display: block; margin-bottom: .6rem; }
.audience-grid b { color: var(--white); font-family: 'Montserrat', sans-serif; }
.audience-grid p { color: var(--muted); font-size: .94rem; margin-top: .4rem; }

/* videos */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 2.5rem; }
.video { color: var(--text); }
.video h3 { margin: 1rem 0 .3rem; font-size: 1.05rem; transition: color .2s; }
.video p { color: var(--muted); font-size: .92rem; }
.video:hover h3 { color: var(--cyan); }
.thumb { position: relative; aspect-ratio: 16/9; border-radius: var(--radius); border: 1px solid var(--line); overflow: hidden; background-size: 20px 20px, 20px 20px, cover; }
.t1 { background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px), linear-gradient(135deg, #13304D, #1B4368); }
.t2 { background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px), linear-gradient(135deg, #0F2A44, #005F80); }
.t3 { background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px), linear-gradient(135deg, #1B4368, #0B1F33); }
.play { position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%; background: rgba(0,194,255,.9); transition: transform .2s; }
.play::after { content: ''; position: absolute; left: 26px; top: 20px; border-left: 18px solid var(--navy); border-top: 12px solid transparent; border-bottom: 12px solid transparent; }
.video:hover .play { transform: scale(1.1); }
.dur { position: absolute; right: 10px; bottom: 10px; background: rgba(0,0,0,.7); color: #fff; font-size: .75rem; padding: .1rem .45rem; border-radius: 3px; }

/* videos: work-in-progress overlay */
.wip { position: relative; }
.wip-content { filter: blur(6px) saturate(.6); opacity: .55; pointer-events: none; user-select: none; }
.wip-overlay { position: absolute; inset: 0; display: grid; place-items: center; padding: 1rem; }
.wip-banner { max-width: 520px; text-align: center; background: rgba(11,31,51,.92); border: 2px solid var(--cyan); border-radius: var(--radius); padding: 0 2rem; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,.45), 0 0 40px rgba(0,194,255,.15); }
.wip-banner .eyebrow { margin: 1.6rem 0 .5rem; }
.wip-banner h3 { font-size: 1.5rem; margin-bottom: .6rem; }
.wip-banner p:not(.eyebrow) { color: var(--muted); font-size: .95rem; margin: 0 0 1.6rem; }
.wip-stripes { display: block; height: 10px; margin: 0 -2rem; background: repeating-linear-gradient(-45deg, var(--cyan) 0 12px, var(--navy) 12px 24px); }

/* about */
.portrait { position: relative; max-width: 380px; margin: 0 auto; }
.portrait img { width: 100%; height: auto; border: 2px solid var(--cyan); border-radius: var(--radius); box-shadow: 16px 16px 0 -2px var(--navy-2), 16px 16px 0 0 var(--line); }
.portrait::after { content: ''; position: absolute; left: -14px; bottom: 28px; border-right: 14px solid var(--cyan); border-top: 9px solid transparent; border-bottom: 9px solid transparent; }
.about h2 { margin-bottom: 1.2rem; }
.about-points { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: .7rem 1.5rem; margin-top: 1.8rem; }
.about-points li { position: relative; padding-left: 1.4rem; font-size: .94rem; color: var(--white); }
.about-points li::before { content: ''; position: absolute; left: 0; top: .5em; width: 8px; height: 8px; background: var(--cyan); }

/* faq */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1.3rem 2.5rem 1.3rem 0; position: relative; color: var(--white); font-weight: 600; font-size: 1.05rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%); color: var(--cyan); font-size: 1.5rem; transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 1.3rem; }

/* contact */
.contact { background: var(--navy-2); overflow: hidden; }
.contact .container { position: relative; }
.contact .section-lead { margin-bottom: 2rem; }
.email {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--white);
  border: 2px solid var(--cyan);
  padding: 1rem 2rem;
  transition: background .2s, color .2s;
  word-break: break-all;
}
.email:hover { background: var(--cyan); color: var(--navy); }
/* phone + WhatsApp buttons */
.contact-actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 1.5rem; }
.contact-btn { display: inline-flex; align-items: center; gap: .6rem; }
.contact-btn svg { width: 20px; height: 20px; fill: currentColor; }
/* floating WhatsApp shortcut (bottom-right) */
.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 60; width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: #25D366; color: #fff; box-shadow: 0 10px 30px rgba(0,0,0,.4); transition: transform .2s; }
.wa-float:hover { transform: scale(1.08); }
.wa-float svg { width: 30px; height: 30px; fill: currentColor; }
.socials { margin-top: 1.8rem; display: flex; gap: .8rem; justify-content: center; color: var(--muted); }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 2.2rem 0; font-size: .88rem; color: var(--muted); }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.site-footer b { color: var(--white); }
.legal { text-align: right; }
.legal p + p, .site-footer p + p { margin-top: .2rem; }

/* engagements */
#process { background: var(--navy-2); }
#process .step { background: var(--navy); }
.plan-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; align-items: stretch; max-width: 860px; margin: 0 auto 2.5rem; }
.plan { position: relative; display: flex; flex-direction: column; background: var(--navy-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem 1.7rem; }
.plan.featured { border-color: var(--cyan); box-shadow: 0 0 0 1px var(--cyan) inset, 0 20px 50px rgba(0,194,255,.12); }
/* hover: lift, cyan border + glow (two-class selector so it overrides the .reveal transition) */
.plan.visible { transition: transform .25s, border-color .25s, box-shadow .25s, background .25s; }
.plan:hover { transform: translateY(-6px); border-color: var(--cyan); background: var(--navy-3); box-shadow: 0 0 0 1px var(--cyan) inset, 0 24px 60px rgba(0,194,255,.22); }
.plan .step-num { transition: background .25s, border-color .25s, color .25s; }
.plan:hover .step-num { background: var(--cyan); border-color: var(--cyan); color: var(--navy); }
.plan-sub { color: var(--cyan-soft); font-size: .88rem; margin: .4rem 0 1.2rem; }
.plan ul { list-style: none; margin-bottom: 1.8rem; flex: 1; }
.plan li { position: relative; padding-left: 1.4rem; margin-bottom: .55rem; font-size: .95rem; }
.plan li::before { content: ''; position: absolute; left: 0; top: .55em; width: 8px; height: 8px; background: var(--cyan); }
.plan .btn { text-align: center; }

/* brand banner */
.brand-banner { max-width: var(--max); margin: 0 auto; padding: 0 20px 80px; }
.brand-banner img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ===== responsive ===== */
@media (max-width: 1000px) {
  .card-grid, .problem-grid, .video-grid, .plan-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .step:not(:last-child)::after { top: auto; right: auto; bottom: -2.25rem; left: 50%; transform: translateX(-50%) rotate(90deg); }
  .core-grid, .also-grid { grid-template-columns: 1fr; }
  .hero-inner, .split { grid-template-columns: 1fr; gap: 40px; }
  .hero-art { max-width: 480px; margin: 0 auto; }
}
@media (max-width: 1000px) {
  .mindmap { grid-template-columns: 1fr; gap: 2rem; }
  .mm-hub { order: -1; width: 200px; margin: 0 auto; }
  .mm-lines { display: none; }
  .mm-col { padding-left: 1.4rem; border-left: 2px solid rgba(0,194,255,.35); }
  .mm-node::before { content: ''; position: absolute; left: calc(-1.4rem - 1px); top: 1.4rem; width: 1.4rem; height: 2px; background: rgba(0,194,255,.35); }
}
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 1rem 20px 1.5rem;
    background: var(--navy); border-bottom: 1px solid var(--line);
    transform: translateY(-120%); transition: transform .3s; z-index: -1;
  }
  .nav-links.open { transform: none; }
  .nav-links a:not(.btn) { padding: .9rem 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-links .btn { margin-top: 1rem; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 70px 0; }
  .hero { padding: 50px 0 70px; }
  .card-grid, .problem-grid, .video-grid, .steps, .audience-grid, .about-points, .plan-grid { grid-template-columns: 1fr; }
  .brand-banner { padding-bottom: 50px; }
  .hero-facts { gap: 1.4rem; }
  .score-row { grid-template-columns: 1fr 1fr 28px; font-size: .8rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .site-footer { padding-bottom: 90px; } /* room for the floating WhatsApp button */
  .legal { text-align: left; }
  .brand-logo { height: 38px; }
}