/* Слой — course landing (course.html) */

/* fix: base `a.btn:hover{color:inherit}` outranks `.btn:hover` — restore fill-contrast text */
a.btn:hover{color:var(--ink)}
a.btn.dk:hover{color:var(--paper)}

/* page-only motion helpers */
.loop .dw{animation-name:draw;animation-duration:3.2s;animation-iteration-count:infinite;animation-direction:alternate}
.spin-slow{animation:spin 40s linear infinite}
.pulse{animation:pulse 1.8s ease-out infinite}
.lift{transition:transform .6s var(--ease),border-color .4s}
.lift:hover{transform:translateY(-6px);border-color:var(--ink-2)}
.hatch{background-image:repeating-linear-gradient(135deg,var(--line-d) 0 1px,transparent 1px 11px);transition:background-position 1.4s var(--ease)}
.hatch:hover{background-position:64px 0}

.btn.lg{height:60px;font-size:17px}
.btn.ink{background:var(--ink);color:var(--paper)}
.btn.outline-ink{border:1px solid var(--ink);color:var(--ink)}

/* shared section scaffolding */
.sheet{position:relative;margin-top:-40px;border-radius:40px 40px 0 0;padding:96px 0 136px}
.sheet.light{background:var(--paper);color:var(--ink-2)}
.sheet.dark{background:var(--ink);color:var(--paper)}
.z1{z-index:1}.z2{z-index:2}.z3{z-index:3}.z4{z-index:4}
.sec-head{display:flex;flex-direction:column;gap:20px;margin-bottom:40px}
.sec-head .sec-head{margin-bottom:0}
.sec-head.row{flex-direction:row;align-items:flex-end;justify-content:space-between;gap:48px}
.sec-head-2{margin-top:96px}
.eyebrow{display:flex;align-items:center;gap:12px;font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-l)}
.dark .eyebrow,.teacher .eyebrow{color:var(--mute-d)}
.eyebrow .sq{display:block;width:8px;height:8px;background:var(--ink-2)}
.eyebrow .sq.acc{background:var(--acc)}
.h2{font-family:var(--f-display);font-size:clamp(32px,4.4vw,56px);font-weight:600;line-height:1.06;letter-spacing:-.04em;overflow-wrap:anywhere}

/* HERO */
.c-hero{position:relative;padding:40px 0 120px;background-color:var(--ink);background-image:linear-gradient(var(--ink-4) 1px,transparent 1px),linear-gradient(90deg,var(--ink-4) 1px,transparent 1px);background-size:48px 48px;background-position:47px 39px}
.corner{position:absolute;top:20px;width:18px;height:18px;border-top:1px solid var(--mute-l)}
.corner.tl{left:20px;border-left:1px solid var(--mute-l)}
.corner.tr{right:20px;border-right:1px solid var(--mute-l)}
.crumbs{display:flex;flex-wrap:wrap;gap:10px;font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d)}
.crumbs [aria-current]{color:var(--paper)}
.hero-grid{margin-top:32px;display:grid;grid-template-columns:minmax(0,1fr) 440px;gap:64px;align-items:start}
.hero-main{display:flex;flex-direction:column;min-width:0}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{height:36px;padding:0 16px;border-radius:999px;border:1px solid var(--line-d2);display:flex;align-items:center;font-size:14px}
.tag-acc{background:var(--acc);border-color:var(--acc);color:var(--ink);font-weight:600}
.hero-title{margin-top:28px;display:flex;flex-direction:column;font-family:var(--f-display);font-size:clamp(50px,7.8vw,112px);font-weight:600;line-height:1;letter-spacing:-.05em}
.hero-title .outline{color:transparent;-webkit-text-stroke:2px var(--paper)}
.hero-title .dot{-webkit-text-stroke:0;color:var(--acc)}
.hero-lead{margin-top:28px;max-width:700px;font-size:clamp(17px,1.5vw,20px);line-height:1.5;color:var(--mute-d2)}
.hero-stats{margin:44px 0 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line-d)}
.hero-stats>div{padding:20px 20px 0;border-left:1px solid var(--line-d);display:flex;flex-direction:column;gap:8px;min-width:0}
.hero-stats>div:first-child{padding-left:0;border-left:0}
.hero-stats>div:last-child{padding-right:0}
.hero-stats dt{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d)}
.hero-stats dd{margin:0;font-family:var(--f-display);font-size:clamp(22px,2vw,28px);font-weight:600}
.hero-stats .start{display:flex;align-items:center;gap:10px}
.live{display:block;width:8px;height:8px;border-radius:50%;background:var(--acc);flex-shrink:0}

.enroll{background:var(--ink-3);border:1px solid var(--line-d);border-radius:28px;padding:20px;display:flex;flex-direction:column;gap:20px}
.trailer{height:240px;border-radius:18px;background:var(--ink);color:var(--acc);display:flex;align-items:center;justify-content:center;background-image:linear-gradient(var(--ink-4) 1px,transparent 1px),linear-gradient(90deg,var(--ink-4) 1px,transparent 1px);background-size:24px 24px;position:relative;overflow:hidden}
.trailer .ill{width:300px;height:200px}
.trailer-cap{position:absolute;left:14px;bottom:12px;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d)}
/* a real trailer: 16:9 block with the silent clip or the video's cover, darkened at the bottom so the caption stays readable */
.trailer.trailer--video{height:auto;min-height:0;aspect-ratio:16/9;cursor:pointer}
.trailer-poster,.trailer-clip{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.trailer .play{z-index:1}
.trailer--video iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000}
.trailer--video::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(4,15,28,.75));pointer-events:none}
.trailer--video .trailer-cap{z-index:1;color:#fff}
.trailer--video .play{z-index:1}
/* playing with sound: the player's own controls, nothing on top */
.trailer--video.is-playing{cursor:auto}
.trailer--video.is-playing::after{content:none}
.play{position:absolute;right:14px;bottom:14px;width:48px;height:48px;border-radius:50%;background:var(--paper);color:var(--ink);display:flex;align-items:center;justify-content:center;transition:transform .5s var(--ease),background .3s}
.play:hover{color:var(--ink);background:var(--acc);transform:scale(1.08)}
.enroll-body{display:flex;flex-direction:column;gap:20px}
.enroll-price{padding:0 8px;display:flex;flex-direction:column;gap:6px}
.enroll-price .k{color:var(--mute-d)}
.enroll-price .big{font-family:var(--f-display);font-size:40px;font-weight:600;letter-spacing:-.03em}
.enroll-price .note{font-size:15px;color:var(--mute-d)}
.enroll-btns{display:flex;flex-direction:column;gap:10px}
.enroll-btns .btn{width:100%}
.ticks{list-style:none;margin:0;padding:4px 8px 8px;display:flex;flex-direction:column;gap:12px;font-size:15px;color:var(--mute-d2)}
.ticks li{display:flex;gap:10px;align-items:center}
.ticks .ico{color:var(--acc)}

/* WHO + SKILLS */
.who-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.who{padding:28px;border-radius:24px;background:var(--paper-2);border:1px solid #D5E1ED;display:flex;flex-direction:column;gap:14px}
.who .n{font-family:var(--f-mono);font-size:13px;color:var(--mute-l)}
.who h3{margin-top:24px;font-size:24px;font-weight:600;line-height:1.25}
.who p{font-size:16px;line-height:1.55;color:var(--mute-l)}
.who-dk{background:var(--ink-2);color:var(--paper);border-color:var(--ink-2)}
.who-dk .n{color:var(--acc)}
.who-dk p{color:var(--mute-d)}
.skills{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:24px;row-gap:40px}
.skills li{padding-top:20px;border-top:1.5px solid var(--ink-2);display:flex;flex-direction:column;gap:10px}
.skills li.acc-line{border-top-color:var(--acc)}
.skills .n{font-family:var(--f-mono);font-size:12px;color:var(--mute-l)}
.skills .t{font-size:20px;font-weight:600}
.skills .d{font-size:16px;line-height:1.5;color:var(--mute-l)}

/* PROGRAM */
.program{display:grid;grid-template-columns:400px minmax(0,1fr);gap:80px;align-items:start}
.prog-side{display:flex;flex-direction:column;gap:20px;align-items:flex-start}
.prog-lead{font-size:17px;line-height:1.55;color:var(--mute-d)}
.prog-stats{margin-top:12px;width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border:1px solid var(--line-d);border-radius:20px}
.prog-stats>div{padding:20px;display:flex;flex-direction:column;gap:6px}
.prog-stats>div:first-child{border-right:1px solid var(--line-d)}
.prog-stats .v{font-family:var(--f-display);font-size:36px;font-weight:600}
.prog-stats .k{color:var(--mute-d)}
.btn.dl{margin-top:8px;height:52px;padding:0 24px;font-weight:600}
.modules{display:flex;flex-direction:column;border-top:1px solid var(--line-d);min-width:0}

.qa{position:relative;border-bottom:1px solid var(--line-d)}
.qa h3{font:inherit}
.mod-btn{width:100%;min-height:96px;display:grid;grid-template-columns:120px minmax(0,1fr) 110px 44px;grid-template-areas:"mt title cnt plus";align-items:center;gap:20px}
.mt{grid-area:mt;font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d);transition:color .3s}
.mtitle{grid-area:title;font-size:24px;font-weight:600;line-height:1.25}
.mcount{grid-area:cnt;font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute-d);text-align:right}
.plus{grid-area:plus;width:44px;height:44px;border-radius:50%;border:1px solid var(--mute-l);display:flex;align-items:center;justify-content:center;transition:transform .5s var(--ease),background .3s,color .3s,border-color .3s}
.mod-btn:hover .plus{border-color:var(--paper)}
.qa[data-open="true"] .plus{transform:rotate(45deg);background:var(--acc);color:var(--ink);border-color:var(--acc)}
.qa[data-open="true"] .mt{color:var(--acc)}
.row-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .7s var(--ease)}
.row-body>div{overflow:hidden;min-height:0;visibility:hidden;transition:visibility 0s .7s}
.qa[data-open="true"] .row-body{grid-template-rows:1fr}
.qa[data-open="true"] .row-body>div{visibility:visible;transition:visibility 0s 0s}
.lessons{list-style:none;margin:0;padding:0 0 24px 140px;display:flex;flex-direction:column;gap:4px}
.lsn{min-height:48px;padding:0 16px;border-radius:12px;display:flex;align-items:center;gap:16px;transition:background .3s,padding .4s var(--ease)}
.lsn:hover{background:#244E7A;padding-left:28px}
.ln{width:40px;flex-shrink:0;font-family:var(--f-mono);font-size:12px;color:var(--mute-d)}
.lt{flex-grow:1;font-size:17px;min-width:0}
.ltype{height:28px;padding:0 12px;border-radius:999px;border:1px solid var(--line-d2);display:flex;align-items:center;flex-shrink:0;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute-d2)}

/* TEACHER */
.teacher-sec{position:relative;z-index:2;background:var(--ink);padding:0 0 136px}
.teacher{display:grid;grid-template-columns:420px minmax(0,1fr);gap:64px;padding:32px;border:1px solid var(--line-d);border-radius:32px;background:#1A3E64}
.photo{position:relative;min-height:480px;border-radius:22px;border:1px solid var(--line-d);display:flex;align-items:center;justify-content:center;overflow:hidden}
.photo .ico{color:var(--mute-l);stroke-width:1.2}
.photo-cap{position:absolute;left:16px;bottom:14px;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d)}
.teacher-body{padding:16px 16px 16px 0;display:flex;flex-direction:column;gap:20px;min-width:0}
.role{font-size:clamp(17px,1.5vw,20px);color:var(--mute-d2)}
.bio{max-width:640px;font-size:17px;line-height:1.6;color:var(--mute-d)}
.t-stats{margin:auto 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line-d)}
.t-stats>div{padding:20px 20px 0;border-left:1px solid var(--line-d);display:flex;flex-direction:column;gap:6px;min-width:0}
.t-stats>div:first-child{padding-left:0;border-left:0}
.t-stats>div:last-child{padding-right:0}
.t-stats dt{font-family:var(--f-display);font-size:clamp(22px,2vw,28px);font-weight:600;overflow-wrap:anywhere}
.t-stats dd{margin:0;font-size:14px;color:var(--mute-d)}
.socials,.f-soc{display:flex;flex-wrap:wrap;gap:8px}
.socials .chip{min-height:44px;padding:0 16px;border:1px solid var(--line-d2);border-radius:999px;display:flex;align-items:center;gap:6px;font-size:14px}

/* RESULT */
.result{display:grid;grid-template-columns:minmax(0,1fr) 600px;gap:80px;align-items:center}
.sheet.z3{padding-bottom:120px}
.result-main{display:flex;flex-direction:column;gap:20px;min-width:0}
.result-lead{max-width:520px;font-size:17px;line-height:1.55;color:var(--mute-l)}
.files{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column}
.files li{padding:18px 0;border-top:1px solid var(--line-l);display:flex;align-items:center;gap:20px}
.files li:last-child{border-bottom:1px solid var(--line-l)}
.files .ext{font-family:var(--f-mono);font-size:12px;color:var(--mute-l);width:40px;flex-shrink:0}
.files .t{flex-grow:1;font-size:19px;font-weight:600}
.files .d{font-size:15px;color:var(--mute-l);text-align:right}
.cert{position:relative;min-height:420px;padding:40px;border-radius:8px;background:var(--paper-2);border:1px solid #D5E1ED;box-shadow:0 40px 80px -40px rgba(22,56,92,.35);transform:rotate(-2deg);display:flex;flex-direction:column;overflow:hidden;color:var(--ink-2)}
.cm{position:absolute;width:16px;height:16px}
.cm.tl{left:14px;top:14px;border-left:1px solid var(--ink-2);border-top:1px solid var(--ink-2)}
.cm.tr{right:14px;top:14px;border-right:1px solid var(--ink-2);border-top:1px solid var(--ink-2)}
.cm.bl{left:14px;bottom:14px;border-left:1px solid var(--ink-2);border-bottom:1px solid var(--ink-2)}
.cm.br{right:14px;bottom:14px;border-right:1px solid var(--ink-2);border-bottom:1px solid var(--ink-2)}
.cert-top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.cert-logo{display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-size:18px;font-weight:700}
.cert-no{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-l)}
.cert-k{margin-top:40px;font-family:var(--f-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute-l)}
.cert-name{margin-top:12px;font-family:var(--f-display);font-size:clamp(24px,2.6vw,36px);font-weight:600;letter-spacing:-.03em}
.cert-txt{margin-top:10px;font-size:17px;color:var(--line-d2)}
.cert-foot{margin-top:auto;padding-top:24px;display:flex;justify-content:space-between;align-items:flex-end;gap:16px}
.sign{display:flex;flex-direction:column;gap:6px}
.sign-line{width:180px;max-width:100%;height:1px;background:var(--ink-2)}
.seal{color:var(--acc);stroke-width:1}

/* PRICING */
.pricing-sec{position:relative;z-index:3;background:var(--paper);color:var(--ink-2);padding:0 0 136px}
.seg{position:relative;flex-shrink:0;width:320px;height:56px;padding:4px;border-radius:999px;border:1px solid var(--line-l2);background:var(--paper-2);display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
.knob{position:absolute;left:4px;top:4px;width:calc(50% - 4px);height:calc(100% - 8px);border-radius:999px;background:var(--ink-2);transition:transform .5s var(--ease)}
.seg[data-pay="parts"] .knob{transform:translateX(100%)}
.seg button{position:relative;text-align:center;font-size:15px;font-weight:600;min-height:44px;border-radius:999px;transition:color .4s}
.seg[data-pay="full"] .o1,.seg[data-pay="parts"] .o2{color:var(--paper)}
.plans{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch}
.plan{padding:32px;border-radius:28px;border:1px solid;display:flex;flex-direction:column;gap:20px}
.pl{background:var(--paper-2);color:var(--ink-2);border-color:#D5E1ED}
.pd{background:var(--ink-2);color:var(--paper);border-color:var(--ink-2)}
.plan-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.plan-head h3{font-family:var(--f-display);font-size:24px;font-weight:600;letter-spacing:-.02em}
.badge{height:30px;padding:0 12px;border-radius:999px;background:var(--acc);color:var(--ink);display:flex;align-items:center;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase}
.plan-desc{min-height:48px;font-size:16px;line-height:1.5;opacity:.75}
.plan-price{padding:20px 0;border-top:1px solid rgba(120,146,175,.35);border-bottom:1px solid rgba(120,146,175,.35);display:flex;flex-direction:column;gap:4px}
.price{display:inline-block;font-family:var(--f-display);font-size:clamp(28px,2.6vw,36px);font-weight:600;letter-spacing:-.03em;animation:rvUp .6s var(--ease) backwards}
.price-note{font-size:14px;opacity:.7}
.feats{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;flex-grow:1}
.feats li{display:flex;gap:12px;align-items:flex-start;font-size:16px;line-height:1.45}
.feats .ico{margin-top:1px;color:var(--acc)}
.pbtn{height:56px;width:100%}
.pbl{border:1px solid var(--ink-2)}

/* contact step after choosing a plan */
.pdlg{width:min(480px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:0;border:0;border-radius:28px;background:var(--paper);color:var(--ink-2);box-shadow:0 40px 80px -30px rgba(4,15,28,.7);overflow:auto}
.pdlg::backdrop{background:rgba(9,24,40,.62);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.pdlg[open]{animation:rvUp .5s var(--ease) backwards}
.pdlg-form{position:relative;padding:36px;display:flex;flex-direction:column;gap:16px}
.pdlg-eb{padding-right:48px;color:var(--mute-l)}
.pdlg h2{font-family:var(--f-display);font-size:26px;font-weight:600;letter-spacing:-.02em;line-height:1.15}
.pdlg-lead{font-size:16px;line-height:1.5;color:var(--mute-l)}
.pdlg-f{display:flex;flex-direction:column;gap:8px;font-size:14px;font-weight:600}
.pdlg-f small{font-size:inherit;font-weight:400;color:var(--mute-l)}
.pdlg-f input{width:100%;height:52px;padding:0 16px;border-radius:14px;border:1px solid var(--line-l2);background:#fff;color:var(--ink-2);font:inherit;font-size:16px;font-weight:400}
.pdlg-f input::placeholder{color:#8FA6BF}
.pdlg-f input:focus-visible{outline:2px solid var(--acc);outline-offset:1px;border-color:transparent}
.pdlg-x{position:absolute;right:20px;top:20px;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--mute-l)}
.pdlg-x:hover{background:#DFE8F1;color:var(--ink-2)}
.pdlg .btn{width:100%;margin-top:4px}
.pdlg-alt{font-size:14px;text-align:center;color:var(--mute-l)}
.pdlg-alt a{color:var(--ink-2);font-weight:600;text-decoration:underline;text-underline-offset:3px}
@media (max-width:640px){.pdlg-form{padding:28px 20px}}

/* REVIEWS */
.rev-note{max-width:380px;font-size:17px;line-height:1.55;color:var(--mute-d)}
.reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rev{margin:0;padding:28px;border-radius:24px;background:var(--ink-3);border:1px solid var(--line-d);display:flex;flex-direction:column;gap:24px}
.rev .q{color:var(--acc)}
.rev blockquote{margin:0;font-size:18px;line-height:1.55;color:var(--mute-d2)}
.rev figcaption{margin-top:auto;display:flex;align-items:center;gap:14px}
.ava{width:48px;height:48px;border-radius:50%;border:1px solid var(--line-d2);flex-shrink:0}
.who-cap{display:flex;flex-direction:column;gap:2px}
.who-cap .nm{font-size:16px;font-weight:600}
.who-cap .pr{font-size:14px;color:var(--mute-d)}
.rev-acc{background:var(--acc);color:var(--ink);border-color:var(--acc)}
.rev-acc blockquote,.rev-acc .who-cap .pr{color:var(--ink)}
.rev-acc .ava{border-color:var(--ink)}

/* CTA */
.cta-sec{position:relative;z-index:5;margin-top:-40px;background:var(--acc);color:var(--ink);border-radius:40px 40px 0 0;padding:80px 0;overflow:hidden}
.cta{display:flex;align-items:center;justify-content:space-between;gap:48px}
.cta-text{display:flex;flex-direction:column;gap:16px}
.cta h2{font-family:var(--f-display);font-size:clamp(40px,5.3vw,76px);font-weight:600;line-height:1;letter-spacing:-.05em}
.cta p{max-width:520px;font-size:19px;line-height:1.5}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap}

/* FOOTER */
.c-footer{border-top:0;padding:48px 0 32px}
.f-top{display:flex;align-items:center;justify-content:space-between;gap:40px}
.f-nav{display:flex;flex-wrap:wrap;gap:32px;font-size:15px}
.f-soc .chip{min-height:34px;padding:0 14px;border:1px solid var(--line-d2);border-radius:999px;display:flex;align-items:center;font-size:13px}
.f-bot{margin-top:32px;padding-top:20px;border-top:1px solid var(--line-d);display:flex;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute-d)}

/* sticky enroll bar (small screens only) */
.enroll-bar{display:none}

/* ≤1280: tighten large fixed columns */
@media (max-width:1280px){
  .hero-grid{grid-template-columns:minmax(0,1fr) 400px;gap:48px}
  .program{grid-template-columns:320px minmax(0,1fr);gap:56px}
  .result{grid-template-columns:minmax(0,1fr) minmax(0,520px);gap:56px}
  .teacher{grid-template-columns:360px minmax(0,1fr);gap:48px}
}

/* ≤1024 */
@media (max-width:1024px){
  .sheet{padding:80px 0 112px}
  .sheet.z3{padding-bottom:96px}
  .c-hero{padding-bottom:100px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .enroll{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:stretch}
  .trailer{height:auto;min-height:260px}
  .who-grid,.reviews{grid-template-columns:repeat(2,minmax(0,1fr))}
  .who-grid>:last-child,.reviews>:last-child{grid-column:1/-1}
  .skills{grid-template-columns:repeat(2,minmax(0,1fr))}
  .program{grid-template-columns:minmax(0,1fr);gap:40px}
  .prog-stats{max-width:420px}
  .lessons{padding-left:0}
  .teacher{grid-template-columns:280px minmax(0,1fr);gap:32px;padding:24px}
  .photo{min-height:0;height:auto}
  .teacher-body{padding:8px 0}
  .result{grid-template-columns:minmax(0,1fr);gap:56px}
  .cert{max-width:600px;width:100%;justify-self:center}
  .plans{grid-template-columns:minmax(0,1fr);max-width:640px;margin:0 auto}
  .pricing-sec{padding-bottom:112px}
  .teacher-sec{padding-bottom:112px}
  .cta{flex-direction:column;align-items:flex-start;gap:32px}
  .f-top{flex-wrap:wrap}
  .f-nav{order:3;width:100%;gap:16px 28px}

  .enroll-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;align-items:center;justify-content:space-between;gap:16px;padding:12px var(--gutter) calc(12px + env(safe-area-inset-bottom));background:rgba(22,56,92,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--line-d);transform:translateY(110%);transition:transform .5s var(--ease)}
  .enroll-bar[data-show="true"]{transform:none}
  .eb-price{display:flex;flex-direction:column;gap:2px;min-width:0}
  .eb-price .mono{font-size:11px;color:var(--mute-d);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .eb-big{font-family:var(--f-display);font-size:20px;font-weight:600;letter-spacing:-.03em}
  .c-footer{padding-bottom:calc(32px + 80px)}
}

/* ≤640 (phones) */
@media (max-width:640px){
  .sheet{margin-top:-28px;border-radius:28px 28px 0 0;padding:64px 0 88px}
  .sheet.z3{padding-bottom:80px}
  .cta-sec{margin-top:-28px;border-radius:28px 28px 0 0;padding:56px 0 64px}
  .c-hero{padding:28px 0 80px;background-position:15px 27px}
  .corner{display:none}
  .sec-head{margin-bottom:28px}
  .sec-head.row{flex-direction:column;align-items:flex-start;gap:24px}
  .sec-head-2{margin-top:72px}
  .hero-title{margin-top:24px}
  .hero-title .outline{-webkit-text-stroke-width:1.5px}
  .hero-stats{margin-top:32px;grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-stats>div{padding:16px 16px 16px 0;border-left:0}
  .hero-stats>div:nth-child(even){padding-left:16px;padding-right:0;border-left:1px solid var(--line-d)}
  .hero-stats>div:nth-child(n+3){border-top:1px solid var(--line-d)}
  .tag{height:34px;padding:0 14px;font-size:13px}
  .enroll{display:flex;padding:14px;border-radius:24px}
  .trailer{min-height:0;height:200px}
  .trailer .ill{width:240px;height:160px}
  .enroll-price .big{font-size:32px}
  .who-grid,.reviews,.skills{grid-template-columns:minmax(0,1fr)}
  .who-grid>:last-child,.reviews>:last-child{grid-column:auto}
  .who{padding:24px}
  .who h3{margin-top:8px;font-size:21px}
  .skills{row-gap:28px}
  .skills .t{font-size:18px}
  .mod-btn{min-height:0;padding:20px 0;grid-template-columns:auto minmax(0,1fr) 44px;grid-template-areas:"mt cnt plus" "title title plus";column-gap:12px;row-gap:8px}
  .mcount{text-align:left}
  .mtitle{font-size:19px}
  .lsn{padding:10px 12px;gap:12px;align-items:flex-start;flex-wrap:wrap}
  .lsn:hover{padding-left:16px}
  .ln{width:32px;padding-top:3px}
  .lt{font-size:16px;flex-basis:calc(100% - 44px)}
  .ltype{margin-left:44px;height:26px}
  .teacher-sec{padding-bottom:88px}
  .teacher{grid-template-columns:minmax(0,1fr);padding:14px;border-radius:24px;gap:24px}
  .photo{aspect-ratio:4/3}
  .teacher-body{padding:4px 6px 10px}
  .t-stats{grid-template-columns:minmax(0,1fr)}
  .t-stats>div,.t-stats>div:first-child,.t-stats>div:last-child{padding:14px 0;border-left:0;border-bottom:1px solid var(--line-d);flex-direction:row;align-items:baseline;justify-content:space-between;gap:12px}
  .t-stats dd{text-align:right}
  .files li{flex-wrap:wrap;gap:4px 16px}
  .files .t{font-size:17px;flex-basis:calc(100% - 56px)}
  .files .d{margin-left:56px;text-align:left;font-size:14px}
  .cert{min-height:0;padding:28px 24px;transform:rotate(-1.2deg)}
  .cert-k{margin-top:28px;font-size:11px}
  .cert-txt{font-size:15px}
  .seal{width:72px;height:72px}
  .sign-line{width:120px}
  .pricing-sec{padding-bottom:88px}
  .seg{width:100%}
  .plan{padding:24px;border-radius:24px}
  .plan-desc{min-height:0}
  .rev{padding:24px}
  .rev blockquote{font-size:17px}
  .cta p{font-size:17px}
  .cta-btns{flex-direction:column;width:100%}
  .cta-btns .btn{width:100%}
  .f-top{flex-direction:column;align-items:flex-start;gap:24px}
  .f-nav a{min-height:44px;display:inline-flex;align-items:center}
  .f-nav .nl::after{bottom:6px}
  .f-soc .chip{min-height:44px}
  .f-bot{flex-direction:column}
  .enroll-bar .btn{height:48px;padding:0 20px}
}

.tag .ptile{margin-right:8px}