/* =============================================================
   MaktabLab — style.css
   Premium futuristic education platform
   White-dominant (80%) · Aqua / Deep-Blue / Purple accents
============================================================= */

/* ---------- Design Tokens ---------- */
:root{
  --white:#FFFFFF;
  --aqua:#00D9FF;
  --aqua-deep:#00A6C4;
  --deep:#0A2540;
  --purple:#7B61FF;

  --ink:#0A2540;
  --ink-2:#3B4A5C;
  --muted:#6B7A8D;
  --line:rgba(10,37,64,.08);
  --line-2:rgba(10,37,64,.12);

  --bg:#FFFFFF;
  --bg-soft:#F6F9FC;
  --bg-tint:#EEF6FB;

  --glass:rgba(255,255,255,.62);
  --glass-strong:rgba(255,255,255,.82);
  --glass-border:rgba(255,255,255,.7);

  --grad-brand:linear-gradient(120deg,#00D9FF 0%,#7B61FF 100%);
  --grad-brand-2:linear-gradient(135deg,#00D9FF 0%,#3B82F6 45%,#7B61FF 100%);
  --grad-deep:linear-gradient(135deg,#0A2540 0%,#103a63 100%);

  --shadow-sm:0 2px 10px rgba(10,37,64,.06);
  --shadow:0 18px 50px -20px rgba(10,37,64,.22);
  --shadow-lg:0 40px 90px -30px rgba(10,37,64,.30);
  --glow-aqua:0 0 0 1px rgba(0,217,255,.25), 0 18px 50px -16px rgba(0,217,255,.45);
  --glow-purple:0 0 60px -10px rgba(123,97,255,.55);

  --r-sm:12px; --r:18px; --r-lg:26px; --r-xl:34px; --r-pill:999px;

  --font-display:'Sora',system-ui,sans-serif;
  --font-body:'Manrope',system-ui,sans-serif;

  --container:1200px;
  --ease:cubic-bezier(.22,1,.36,1);
  --ease-bounce:cubic-bezier(.34,1.56,.64,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul{list-style:none}
input,select{font-family:inherit;font-size:1rem}
::selection{background:rgba(0,217,255,.25)}

.container{width:min(var(--container),92%);margin-inline:auto}

/* ---------- Typography helpers ---------- */
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.08;letter-spacing:-.02em;color:var(--ink)}
.grad-text{
  background:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.eyebrow{
  display:inline-block;font-family:var(--font-display);font-weight:600;
  font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--aqua-deep);margin-bottom:14px;
}

/* ---------- Atmosphere: blobs + grid ---------- */
.blobs{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;will-change:transform}
.blob--aqua{width:46vw;height:46vw;background:radial-gradient(circle,#00D9FF,transparent 65%);top:-12%;left:-8%;animation:blobFloat 18s var(--ease) infinite}
.blob--purple{width:42vw;height:42vw;background:radial-gradient(circle,#7B61FF,transparent 65%);top:30%;right:-12%;animation:blobFloat 22s var(--ease) infinite reverse}
.blob--blue{width:38vw;height:38vw;background:radial-gradient(circle,#3B82F6,transparent 65%);bottom:-15%;left:25%;opacity:.35;animation:blobFloat 26s var(--ease) infinite}
@keyframes blobFloat{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(6%,8%) scale(1.12)}
  66%{transform:translate(-5%,-6%) scale(.92)}
}
.grid-overlay{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(10,37,64,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(10,37,64,.035) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
}

/* ---------- Cursor glow ---------- */
.cursor-glow{
  position:fixed;top:0;left:0;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,217,255,.16),rgba(123,97,255,.10) 40%,transparent 70%);
  transform:translate(-50%,-50%);pointer-events:none;z-index:9990;
  transition:opacity .4s;will-change:transform;mix-blend-mode:multiply;opacity:0;
}
@media(hover:hover){.cursor-glow{opacity:1}}

/* ---------- Scroll progress ---------- */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--grad-brand);z-index:9999;box-shadow:0 0 12px rgba(0,217,255,.6)}

/* ---------- Preloader ---------- */
.preloader{position:fixed;inset:0;z-index:10000;background:var(--white);display:grid;place-items:center;transition:opacity .6s,visibility .6s}
.preloader.hide{opacity:0;visibility:hidden}
.preloader__core{position:relative;width:120px;height:120px;display:grid;place-items:center}
.preloader__ring{position:absolute;inset:0;border-radius:50%;border:2px solid transparent}
.preloader__ring:nth-child(1){border-top-color:var(--aqua);animation:spin 1s linear infinite}
.preloader__ring:nth-child(2){inset:14px;border-right-color:var(--purple);animation:spin 1.4s linear infinite reverse}
.preloader__ring:nth-child(3){inset:28px;border-bottom-color:var(--deep);animation:spin .9s linear infinite}
.preloader__logo{font-family:var(--font-display);font-weight:700;font-size:.85rem;letter-spacing:.05em;color:var(--ink)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Buttons ---------- */
.btn{
  --pad:13px 22px;
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:var(--pad);border-radius:var(--r-pill);
  font-family:var(--font-display);font-weight:600;font-size:.95rem;
  letter-spacing:-.01em;transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .3s;
  white-space:nowrap;position:relative;overflow:hidden;
}
.btn--lg{--pad:16px 30px;font-size:1.02rem}
.btn--block{width:100%}
.btn:active{transform:scale(.97)}

.btn--primary{background:var(--grad-brand);color:#fff;box-shadow:var(--glow-aqua)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 0 0 1px rgba(0,217,255,.3),0 26px 60px -18px rgba(0,217,255,.65)}
.btn--primary .btn__arrow{transition:transform .35s var(--ease)}
.btn--primary:hover .btn__arrow{transform:translateX(5px)}

.btn--ghost{color:var(--ink);background:transparent}
.btn--ghost:hover{background:rgba(10,37,64,.05)}

.btn--glass{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn--glass:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.btn--glass .play{color:var(--aqua-deep);font-size:.8rem}

.btn--light{background:#fff;color:var(--deep);box-shadow:0 20px 50px -18px rgba(0,0,0,.4)}
.btn--light:hover{transform:translateY(-3px)}

.btn--google{width:100%;background:#fff;border:1px solid var(--line-2);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn--google:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.g-icon{display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:conic-gradient(#EA4335,#FBBC05,#34A853,#4285F4);color:#fff;font-weight:800;font-size:.85rem}

/* ---------- Navbar ---------- */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:900;padding:18px 0;transition:padding .4s var(--ease)}
.navbar.scrolled{padding:10px 0}
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:12px 20px;border-radius:var(--r-pill);
  background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow-sm);
  transition:box-shadow .4s,background .4s;
}
.navbar.scrolled .nav{box-shadow:var(--shadow);background:var(--glass-strong)}
.nav__logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.15rem}
.nav__logo-mark{color:var(--aqua-deep);display:grid;place-items:center;animation:logoSpin 14s linear infinite}
@keyframes logoSpin{to{transform:rotate(360deg)}}
.nav__logo-text b{color:var(--purple)}
.nav__menu{display:flex;gap:2px;align-items:center;flex:1}
.nav__auth{margin-left:auto;display:flex;align-items:center;gap:10px;list-style:none}
.nav__link{padding:8px 10px;border-radius:var(--r-pill);font-weight:500;font-size:.95rem;color:var(--ink-2);position:relative;transition:color .25s;white-space:nowrap}
.nav__link::after{content:"";position:absolute;left:10px;right:10px;bottom:6px;height:2px;background:var(--grad-brand);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav__link:hover{color:var(--ink)}
.nav__link:hover::after,.nav__link.active::after{transform:scaleX(1)}
.nav__link.active{color:var(--ink)}
.nav__actions{display:flex;align-items:center;gap:8px}
.nav__burger{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:10px}
.nav__burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s var(--ease)}
.nav__burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__burger.open span:nth-child(2){opacity:0}
.nav__burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:140px 0 80px;overflow:hidden}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.hero__content{position:relative;z-index:3;max-width:760px;text-align:center;margin-inline:auto}
.hero__badge{
  display:inline-flex;align-items:center;gap:9px;padding:8px 16px;border-radius:var(--r-pill);
  background:var(--glass-strong);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow-sm);
  font-family:var(--font-display);font-weight:600;font-size:.8rem;color:var(--ink-2);margin-bottom:26px;
}
.hero__badge .dot{width:8px;height:8px;border-radius:50%;background:var(--aqua);box-shadow:0 0 10px var(--aqua);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.5);opacity:.5}}
.hero__title{font-size:clamp(2.6rem,7vw,5.4rem);font-weight:800;margin-bottom:22px}
.hero__subtitle{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--muted);max-width:620px;margin:0 auto 36px}
.hero__cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.hero__pills{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.pill{
  padding:9px 18px;border-radius:var(--r-pill);background:var(--glass);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);font-size:.9rem;color:var(--ink-2);box-shadow:var(--shadow-sm)
}
.pill b{color:var(--ink);font-family:var(--font-display)}
.hero__scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--muted)}
.hero__scroll-mouse{width:22px;height:36px;border:2px solid var(--line-2);border-radius:12px;position:relative}
.hero__scroll-mouse::after{content:"";position:absolute;top:6px;left:50%;transform:translateX(-50%);width:4px;height:7px;border-radius:2px;background:var(--aqua-deep);animation:scrollDot 1.6s infinite}
@keyframes scrollDot{0%{opacity:1;top:6px}80%{opacity:0;top:18px}100%{opacity:0}}
.hero__scroll-text{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase}

/* ---------- Trust bar ---------- */
.trustbar{padding:26px 0;border-block:1px solid var(--line);background:var(--glass-strong);overflow:hidden}
.trustbar__track{display:flex;gap:34px;align-items:center;font-family:var(--font-display);font-weight:600;font-size:.95rem;letter-spacing:.08em;color:var(--muted);width:max-content;animation:marquee 28s linear infinite}
.trustbar__track span{opacity:.7}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
.section{padding:clamp(20px,3vw,38px) 0;position:relative}
.section--soft{background:linear-gradient(180deg,transparent,var(--bg-soft) 12%,var(--bg-soft) 88%,transparent)}
.section__head{max-width:680px;margin:0 auto 26px;text-align:center}
.section__title{font-size:clamp(2rem,4.5vw,3.2rem);margin-bottom:6px}
.section__lead{color:var(--muted);font-size:clamp(1rem,1.6vw,1.15rem)}

/* ---------- Subjects ---------- */
.subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.subject{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  background:var(--glass-strong);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
  transform-style:preserve-3d;
}
.subject:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}
.subject__canvas{width:100%;height:240px;display:block;background:radial-gradient(circle at 50% 40%,var(--bg-tint),transparent 70%)}
.subject__body{padding:26px 26px 30px}
.subject__tag{display:inline-block;padding:5px 14px;border-radius:var(--r-pill);font-family:var(--font-display);font-weight:600;font-size:.78rem;margin-bottom:14px}
.tag--aqua{background:rgba(0,217,255,.12);color:var(--aqua-deep)}
.tag--purple{background:rgba(123,97,255,.12);color:var(--purple)}
.tag--blue{background:rgba(10,37,64,.08);color:var(--deep)}
.subject__title{font-size:1.5rem;margin-bottom:10px}
.subject__text{color:var(--muted);margin-bottom:18px;font-size:.97rem}
.subject__list{display:flex;flex-direction:column;gap:9px;margin-bottom:20px}
.subject__list li{position:relative;padding-left:24px;font-size:.92rem;color:var(--ink-2)}
.subject__list li::before{content:"";position:absolute;left:0;top:8px;width:12px;height:12px;border-radius:4px;background:var(--grad-brand)}
.link-arrow{font-family:var(--font-display);font-weight:600;font-size:.92rem;color:var(--aqua-deep);transition:gap .3s,letter-spacing .3s}
.link-arrow:hover{letter-spacing:.02em}

/* ---------- Features ---------- */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{
  padding:32px 28px;border-radius:var(--r-lg);background:var(--white);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s;
  position:relative;overflow:hidden;
}
.feature::before{content:"";position:absolute;inset:0;background:var(--grad-brand);opacity:0;transition:opacity .45s;z-index:0;mix-blend-mode:multiply}
.feature::after{content:"";position:absolute;top:-40%;right:-30%;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(0,217,255,.18),transparent 70%);opacity:0;transition:opacity .5s}
.feature:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.feature:hover::after{opacity:1}
.feature__icon{
  width:62px;height:62px;border-radius:18px;display:grid;place-items:center;font-size:1.7rem;color:#2563EB;
  background:linear-gradient(135deg,rgba(0,217,255,.14),rgba(123,97,255,.14));
  margin-bottom:18px;position:relative;z-index:1;transition:transform .45s var(--ease-bounce);
}
.feature:hover .feature__icon{transform:translateY(-4px) rotate(-6deg) scale(1.06)}
.feature h3{font-size:1.2rem;margin-bottom:8px;position:relative;z-index:1}
.feature p{color:var(--muted);font-size:.95rem;position:relative;z-index:1}

/* ---------- Experiments ---------- */
.exp-filters{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.chip{
  padding:10px 20px;border-radius:var(--r-pill);font-family:var(--font-display);font-weight:600;font-size:.9rem;
  background:var(--white);border:1px solid var(--line-2);color:var(--ink-2);transition:.3s var(--ease)
}
.chip:hover{border-color:var(--aqua);color:var(--ink)}
.chip.is-active{background:var(--grad-brand);color:#fff;border-color:transparent;box-shadow:var(--glow-aqua)}
.exp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.exp-card{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--white);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),opacity .4s,scale .4s;
}
.exp-card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.exp-card.hide{display:none}
.exp-card__media{height:160px;position:relative;overflow:hidden;display:grid;place-items:center;font-size:3.4rem}
.exp-card__media span{position:relative;z-index:1;transition:transform .5s var(--ease)}
.exp-card:hover .exp-card__media span{transform:scale(1.15) rotate(4deg)}
.exp-card__body{padding:20px 22px 24px}
.exp-card__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.exp-card__cat{font-family:var(--font-display);font-weight:600;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--aqua-deep)}
.diff{padding:4px 12px;border-radius:var(--r-pill);font-size:.72rem;font-weight:700;font-family:var(--font-display)}
.diff--easy{background:rgba(52,199,123,.14);color:#16a34a}
.diff--medium{background:rgba(0,217,255,.14);color:var(--aqua-deep)}
.diff--hard{background:rgba(123,97,255,.14);color:var(--purple)}
.exp-card h3{font-size:1.22rem;margin-bottom:8px}
.exp-card p{color:var(--muted);font-size:.92rem;margin-bottom:16px}
.exp-card__foot{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--muted)}
.exp-card__btn{font-family:var(--font-display);font-weight:600;color:var(--ink);transition:color .3s}
.exp-card__btn:hover{color:var(--aqua-deep)}

/* media backgrounds per category */
.media--fizika{background:linear-gradient(135deg,rgba(0,217,255,.16),rgba(59,130,246,.12))}
.media--matematika{background:linear-gradient(135deg,rgba(123,97,255,.16),rgba(0,217,255,.1))}
.media--robototexnika{background:linear-gradient(135deg,rgba(10,37,64,.1),rgba(123,97,255,.14))}

/* ---------- Stats ---------- */
.stats{padding:70px 0;position:relative}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:46px 30px;border-radius:var(--r-xl);
  background:var(--grad-deep);color:#fff;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.stats__grid::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 20%,rgba(0,217,255,.3),transparent 45%),radial-gradient(circle at 85% 80%,rgba(123,97,255,.3),transparent 45%)}
.stat{text-align:center;position:relative;z-index:1}
.stat__num{display:block;font-family:var(--font-display);font-weight:800;font-size:clamp(2.2rem,5vw,3.4rem);line-height:1;
  background:linear-gradient(120deg,#fff,#9be8ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat__label{display:block;margin-top:10px;color:rgba(255,255,255,.72);font-size:.95rem;letter-spacing:.02em}

/* ---------- Robotics ---------- */
.robotics__grid{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center}
.robotics__media{position:relative;border-radius:var(--r-xl);overflow:hidden;
  background:var(--grad-deep);box-shadow:var(--shadow-lg);min-height:460px}
.robotics__canvas{width:100%;height:100%;position:absolute;inset:0}
.robotics__hud{position:absolute;top:18px;left:18px;display:flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);background:rgba(255,255,255,.1);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.2);color:#fff;font-family:var(--font-display);font-size:.74rem;letter-spacing:.08em}
.hud__dot{width:8px;height:8px;border-radius:50%;background:var(--aqua);box-shadow:0 0 10px var(--aqua);animation:pulse 1.4s infinite}
.robotics__rows{display:flex;flex-direction:column;gap:18px;margin:26px 0 30px}
.rrow{display:flex;gap:16px;align-items:flex-start}
.rrow__k{font-family:var(--font-display);font-weight:800;font-size:1.05rem;color:var(--aqua-deep);min-width:32px}
.rrow b{font-family:var(--font-display);font-size:1.05rem}
.rrow p{color:var(--muted);font-size:.93rem}

/* ---------- Pricing ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.plan{
  display:flex;flex-direction:column;padding:34px 30px;border-radius:var(--r-xl);
  background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease)
}
.plan:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.plan--featured{background:var(--grad-deep);color:#fff;border-color:transparent;box-shadow:var(--shadow-lg);position:relative}
.plan--featured .plan__name,.plan--featured .plan__price b{color:#fff}
.plan--featured .plan__price,.plan--featured .plan__feat{color:rgba(255,255,255,.8)}
.plan__ribbon{position:absolute;top:18px;right:18px;padding:5px 12px;border-radius:var(--r-pill);background:var(--grad-brand);font-family:var(--font-display);font-weight:600;font-size:.72rem}
.plan__name{font-family:var(--font-display);font-weight:600;font-size:1rem;letter-spacing:.04em;text-transform:uppercase;color:var(--aqua-deep);margin-bottom:14px}
.plan__price{font-size:.9rem;color:var(--muted);margin-bottom:6px}
.plan__price b{font-family:var(--font-display);font-weight:800;font-size:2.6rem;color:var(--ink);letter-spacing:-.02em}
.plan__meta{font-size:.85rem;color:var(--muted);margin-bottom:22px}
.plan--featured .plan__meta{color:rgba(255,255,255,.65)}
.plan__feats{display:flex;flex-direction:column;gap:11px;margin-bottom:26px;flex:1}
.plan__feat{display:flex;gap:10px;align-items:flex-start;font-size:.93rem}
.plan__feat::before{content:"✓";color:var(--aqua-deep);font-weight:800}
.plan--featured .plan__feat::before{color:var(--aqua)}
.plans__note{text-align:center;margin-top:28px;color:var(--muted);font-size:.92rem}

/* ---------- Testimonials ---------- */
.testi{position:relative;overflow:hidden}
.testi__track{display:flex;transition:transform .6s var(--ease)}
.testi-card{
  flex:0 0 calc(100%/3 - 18px);margin-right:27px;padding:30px 28px;border-radius:var(--r-lg);
  background:var(--glass-strong);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow);animation:floaty 6s ease-in-out infinite;
}
.testi-card:nth-child(even){animation-delay:-3s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.testi-card__stars{color:#FFB100;margin-bottom:14px;letter-spacing:2px}
.testi-card__text{font-size:1rem;color:var(--ink-2);margin-bottom:20px}
.testi-card__user{display:flex;align-items:center;gap:12px}
.testi-card__avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;color:#fff;background:var(--grad-brand)}
.testi-card__name{font-family:var(--font-display);font-weight:600;font-size:.98rem}
.testi-card__role{font-size:.83rem;color:var(--muted)}
.testi__nav{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:36px}
.testi__btn{width:48px;height:48px;border-radius:50%;background:var(--white);border:1px solid var(--line-2);font-size:1.1rem;box-shadow:var(--shadow-sm);transition:.3s var(--ease)}
.testi__btn:hover{background:var(--grad-brand);color:#fff;border-color:transparent;transform:translateY(-2px)}
.testi__dots{display:flex;gap:8px}
.testi__dots button{width:9px;height:9px;border-radius:50%;background:var(--line-2);transition:.3s}
.testi__dots button.is-active{width:26px;border-radius:5px;background:var(--grad-brand)}

/* ---------- Gallery / masonry ---------- */
.masonry{columns:3;column-gap:18px}
.tile{
  break-inside:avoid;margin-bottom:18px;border-radius:var(--r-lg);overflow:hidden;position:relative;
  box-shadow:var(--shadow-sm);cursor:pointer;
}
.tile__inner{position:relative;display:grid;place-items:center;color:#fff;font-family:var(--font-display);font-weight:600;
  transition:transform .6s var(--ease)}
.tile:hover .tile__inner{transform:scale(1.08)}
.tile__overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(10,37,64,.7),transparent 55%);
  display:flex;align-items:flex-end;padding:18px;opacity:0;transition:opacity .4s}
.tile:hover .tile__overlay{opacity:1}
.tile__overlay span{color:#fff;font-family:var(--font-display);font-weight:600;font-size:.95rem}
.tile__emoji{font-size:2.6rem}

/* ---------- CTA ---------- */
.cta{position:relative;padding:clamp(70px,10vw,140px) 0;overflow:hidden}
.cta__inner{text-align:center;max-width:720px;margin-inline:auto;position:relative;z-index:2;
  padding:clamp(46px,7vw,80px) clamp(28px,5vw,60px);border-radius:var(--r-xl);
  background:var(--grad-deep);color:#fff;box-shadow:var(--shadow-lg);overflow:hidden}
.cta__inner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 10%,rgba(0,217,255,.35),transparent 40%),radial-gradient(circle at 80% 90%,rgba(123,97,255,.35),transparent 40%)}
.cta__title{font-size:clamp(2rem,5vw,3.4rem);margin-bottom:16px;position:relative;z-index:1}
.cta__text{color:rgba(255,255,255,.8);font-size:1.1rem;margin-bottom:32px;position:relative;z-index:1}
.cta__inner .btn{position:relative;z-index:1}
.cta__glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:70vw;height:70vw;border-radius:50%;
  background:radial-gradient(circle,rgba(0,217,255,.14),transparent 60%);filter:blur(20px);z-index:1}

/* ---------- Footer ---------- */
.footer{padding:70px 0 30px;background:var(--bg-soft);border-top:1px solid var(--line)}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer__brand p{color:var(--muted);font-size:.93rem;margin:16px 0 20px;max-width:320px}
.footer__socials{display:flex;gap:10px}
.footer__socials a{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--white);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);font-size:1rem;transition:.3s var(--ease)}
.footer__socials a:hover{transform:translateY(-3px);box-shadow:var(--shadow);color:var(--aqua-deep)}
.footer__col h4{font-size:1rem;margin-bottom:16px}
.footer__col a{display:block;color:var(--muted);font-size:.93rem;padding:5px 0;transition:color .25s,padding-left .25s}
.footer__col a:hover{color:var(--aqua-deep);padding-left:5px}
.footer__bottom{display:flex;justify-content:space-between;padding-top:24px;border-top:1px solid var(--line);
  color:var(--muted);font-size:.85rem}

/* ---------- Modal ---------- */
.modal{position:fixed;inset:0;z-index:9500;display:grid;place-items:center;padding:20px;
  opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s}
.modal.open{opacity:1;visibility:visible}
.modal__overlay{position:absolute;inset:0;background:rgba(10,37,64,.4);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.modal__card{position:relative;width:min(440px,100%);max-height:92vh;overflow:auto;
  padding:36px 34px;border-radius:var(--r-xl);
  background:var(--glass-strong);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow-lg);
  transform:translateY(30px) scale(.96);transition:transform .5s var(--ease-bounce)}
.modal.open .modal__card{transform:translateY(0) scale(1)}
.modal__close{position:absolute;top:18px;right:18px;width:36px;height:36px;border-radius:50%;
  background:rgba(10,37,64,.06);display:grid;place-items:center;font-size:.9rem;transition:.3s}
.modal__close:hover{background:rgba(10,37,64,.12);transform:rotate(90deg)}
.modal__tabs{display:flex;gap:6px;padding:5px;border-radius:var(--r-pill);background:rgba(10,37,64,.05);margin-bottom:26px}
.modal__tab{flex:1;padding:11px;border-radius:var(--r-pill);font-family:var(--font-display);font-weight:600;font-size:.92rem;color:var(--muted);transition:.3s var(--ease)}
.modal__tab.is-active{background:var(--white);color:var(--ink);box-shadow:var(--shadow-sm)}
.modal__title{font-size:1.5rem;margin-bottom:6px}
.modal__sub{color:var(--muted);font-size:.92rem;margin-bottom:22px}
.auth{display:none;flex-direction:column;gap:16px;animation:fadeUp .5s var(--ease)}
.auth.is-active{display:flex}
.divider{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:.82rem;margin:2px 0}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line-2)}
.field{display:flex;flex-direction:column;gap:7px}
.field__label{font-size:.85rem;font-weight:600;color:var(--ink-2)}
.field input,.field select{
  width:100%;padding:13px 15px;border-radius:var(--r-sm);border:1px solid var(--line-2);
  background:var(--white);transition:border-color .3s,box-shadow .3s;color:var(--ink)}
.field input:focus,.field select:focus{outline:none;border-color:var(--aqua);box-shadow:0 0 0 4px rgba(0,217,255,.14)}
.field.invalid input{border-color:#ef4444;box-shadow:0 0 0 4px rgba(239,68,68,.12)}
.field.valid input{border-color:#16a34a}
.field__pass{position:relative;display:flex}
.field__pass input{padding-right:46px}
.field__phone{display:flex;align-items:stretch;border:1px solid var(--line-2);border-radius:var(--r-sm);overflow:hidden;background:var(--white);transition:border-color .3s,box-shadow .3s}
.field__phone:focus-within{border-color:var(--aqua);box-shadow:0 0 0 4px rgba(0,217,255,.14)}
.field__cc{display:flex;align-items:center;padding:0 13px;background:#F1F6FB;font-weight:700;color:#0F2238;border-right:1px solid var(--line-2);font-size:.95rem;white-space:nowrap}
.field__phone input{border:none!important;box-shadow:none!important;border-radius:0;letter-spacing:1px}
.field.invalid .field__phone{border-color:#ef4444;box-shadow:0 0 0 4px rgba(239,68,68,.12)}
.pass-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:8px;display:grid;place-items:center;opacity:.6;transition:opacity .25s}
.pass-toggle:hover{opacity:1}
.field__error{color:#ef4444;font-size:.78rem;min-height:0;transition:.2s}
.field.invalid .field__error{min-height:14px}
.strength{height:5px;border-radius:3px;background:var(--line-2);overflow:hidden;margin-top:2px}
.strength__bar{display:block;height:100%;width:0;border-radius:3px;transition:width .35s,background .35s}
.modal__foot{text-align:center;font-size:.9rem;color:var(--muted);margin-top:4px}
.linkbtn{color:var(--aqua-deep);font-weight:600}
.linkbtn:hover{text-decoration:underline}

/* ---------- Toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translate(-50%,30px);z-index:9999;
  padding:14px 24px;border-radius:var(--r-pill);background:var(--grad-deep);color:#fff;
  font-family:var(--font-display);font-weight:600;font-size:.92rem;box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transition:.45s var(--ease)}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .subjects,.features,.exp-grid,.plans{grid-template-columns:repeat(2,1fr)}
  .robotics__grid{grid-template-columns:1fr;gap:36px}
  .robotics__media{min-height:380px}
  .masonry{columns:2}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:34px 24px}
  .testi-card{flex:0 0 calc(100%/2 - 14px)}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .nav__menu{
    position:fixed;top:80px;left:4%;width:92%;flex-direction:column;gap:4px;padding:14px;
    background:var(--glass-strong);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
    border:1px solid var(--glass-border);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.4s var(--ease)}
  .nav__menu.open{transform:none;opacity:1;visibility:visible}
  .nav__link{display:block}
  .nav__burger{display:flex}
  .nav__auth{margin-left:0;flex-direction:column;align-items:stretch;gap:8px;width:100%;
    margin-top:8px;padding-top:12px;border-top:1px solid var(--glass-border)}
  .nav__guest,.nav__user-chip{flex-direction:column;align-items:stretch;gap:8px;width:100%}
  .nav__auth .btn{width:100%;justify-content:center}
  .nav__user-chip .nav__uname{display:inline-block;text-align:center;max-width:none}
  .subjects,.features,.exp-grid,.plans{grid-template-columns:1fr}
  .masonry{columns:1}
  .testi-card{flex:0 0 100%;margin-right:0}
  .footer__grid{grid-template-columns:1fr;gap:30px}
  .footer__bottom{flex-direction:column;gap:8px;text-align:center}
  .hero{padding-top:120px}
}
@media(max-width:420px){
  .stats__grid{grid-template-columns:1fr}
  .hero__pills{flex-direction:column;align-items:center}
}

/* ---------- Reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* =============================================================
   MODERN SVG ART (experiment cards + gallery tiles)
============================================================= */
input,select,textarea{font-family:inherit;font-size:1rem}
textarea{resize:vertical}

.art{display:block}
.exp-card__media .art{width:82%;height:auto;filter:drop-shadow(0 6px 16px rgba(10,37,64,.12))}
.exp-card__img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s var(--ease)}
.exp-card:hover .exp-card__img{transform:scale(1.06)}

/* gallery tile art + images (animation handled inline via SMIL) */
.art--tile{width:46%;height:auto;opacity:.95}
.tile__img{width:100%;display:block;transition:transform .6s var(--ease)}
.tile:hover .tile__img{transform:scale(1.07)}

/* ---------- Kimyo (chemistry) media ---------- */
.media--kimyo{background:linear-gradient(135deg,rgba(22,163,74,.14),rgba(0,217,255,.12))}

/* ---------- Experiments: see-all button ---------- */
.exp-more{text-align:center;margin-top:36px}

/* ---------- Navbar auth state ---------- */
.nav__guest{display:flex;align-items:center;gap:10px}
.nav__user-chip{display:flex;align-items:center;gap:10px}
.nav__guest[hidden],.nav__user-chip[hidden]{display:none}
.nav__avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;
  font-family:var(--font-display);font-weight:700;background:var(--grad-brand);box-shadow:var(--shadow-sm)}
.nav__uname{font-family:var(--font-display);font-weight:600;font-size:.92rem;color:var(--ink);max-width:140px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media(max-width:560px){.nav__uname{display:none}}

/* ============================================================
   HOVER EFFEKTLAR — butun sayt (interaktiv his)
============================================================ */
.feature{transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}
.feature:hover{transform:translateY(-6px);box-shadow:0 26px 54px -28px rgba(37,99,235,.5);border-color:rgba(0,217,255,.5)}
.feature__icon{transition:transform .3s ease}
.feature:hover .feature__icon{transform:scale(1.16) rotate(-6deg)}
.pill{transition:transform .2s ease,box-shadow .2s ease}
.pill:hover{transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(0,180,255,.6)}
.plan{transition:transform .28s ease,box-shadow .28s ease}
.plan:hover{transform:translateY(-7px);box-shadow:0 30px 60px -30px rgba(37,99,235,.5)}
.btn{transition:transform .2s ease,box-shadow .2s ease,filter .2s ease}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px -12px rgba(37,99,235,.6)}
.btn--glass:hover,.btn--ghost:hover{transform:translateY(-2px)}
.gcard,.testimonial,.tcard{transition:transform .28s ease,box-shadow .28s ease}
.gcard:hover,.testimonial:hover,.tcard:hover{transform:translateY(-6px);box-shadow:0 26px 54px -30px rgba(10,37,64,.5)}
.stat{transition:transform .25s ease}
.stat:hover{transform:translateY(-4px)}
/* logo hover */
.nav__logo-img{transition:transform .3s ease,filter .3s ease}
.nav__logo:hover .nav__logo-img{transform:rotate(-8deg) scale(1.06);filter:drop-shadow(0 6px 14px rgba(0,217,255,.5))}