/* ==========================================================================
   Sokraft — AI Kurs — v2
   Tamna "orbital" tema: duboka petrol-crna pozadina, glow prstenovi,
   staklaste kartice, zeleno→cijan brend gradijent.
   ========================================================================== */

:root{
  --bg:            #04080a;
  --bg-2:          #060d10;
  --bg-3:          #081114;

  --surface:       rgba(255,255,255,.045);
  --surface-2:     rgba(255,255,255,.07);
  --border:        rgba(255,255,255,.08);
  --border-strong: rgba(255,255,255,.16);

  --text:          #f2f6f7;
  --text-dim:      #98a8ae;
  --text-dimmer:   #5f6f75;

  --g1:            #6ede46;
  --g2:            #22c7c2;
  --g3:            #22b3e8;
  --gradient:      linear-gradient(120deg, var(--g1) 0%, var(--g2) 52%, var(--g3) 100%);
  --accent:        #22c7c2;
  --ink:           #03140f;
  --danger:        #f2726b;

  --font-display:  'Plus Jakarta Sans', 'Inter', system-ui, sans-serif; /* naslovi (glavni 700, podnaslovi 600) */
  --font-body:     'Inter', system-ui, sans-serif;
  --font-mono:     'Inter', system-ui, sans-serif; /* labeli/brojevi — Inter (odluka korisnika 2026-07-17) */

  --container:     1200px;
  --radius:        0px;
  --radius-sm:     0px;
  --ease:          cubic-bezier(.16,.84,.44,1);
  --spring:        cubic-bezier(.34,1.56,.64,1);
  --band:          42px;
}

*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
html, body{ margin:0; padding:0; }

html{ overflow-x:clip; }
body{
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x:clip;
}
@supports not (overflow-x: clip){
  html, body{ overflow-x:hidden; }
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:none; cursor:pointer; }
input, textarea{ font:inherit; color:inherit; }
h1,h2,h3,h4,p{ margin:0; }

.container{ max-width:var(--container); margin:0 auto; padding:0 28px; position:relative; z-index:2; }

#setup, #lessons, #about, #contact{ scroll-margin-top:84px; }

::selection{ background:var(--g2); color:var(--ink); }

::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background:var(--bg); }
::-webkit-scrollbar-thumb{ background:rgba(255,255,255,.14); border-radius:0; }

:focus-visible{ outline:2px solid rgba(34,199,194,.75); outline-offset:3px; border-radius:0; }

/* ---------- text helpers ---------- */
.text-solid{ display:block; color:var(--text); }
.text-gradient{
  display:block;
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  /* prostor za descendere (j, g, đ...) — background-clip:text ne boji van padding box-a */
  padding-top:.04em;
  padding-bottom:.16em;
  margin-bottom:-.16em;
}

/* ==========================================================================
   Global chrome
   ========================================================================== */

.scroll-progress{
  position:fixed; top:0; left:0; height:6px; width:0%;
  background:var(--gradient);
  z-index:950;
  box-shadow:0 0 18px rgba(34,199,194,.65);
}

.cursor-glow{
  position:fixed; top:0; left:0; width:360px; height:360px;
  margin:-180px 0 0 -180px;
  border-radius:0;
  background:radial-gradient(circle, rgba(34,199,194,.12), rgba(34,199,194,0) 68%);
  pointer-events:none;
  z-index:3;
  transform:translate(-999px,-999px);
  will-change:transform;
}
@media (pointer:coarse){ .cursor-glow{ display:none; } }

.grid-overlay{
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.024) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 95% 62% at 50% 0%, #000 0%, transparent 74%);
  -webkit-mask-image:radial-gradient(ellipse 95% 62% at 50% 0%, #000 0%, transparent 74%);
  opacity:.55;
}

/* ==========================================================================
   Reveal on scroll
   ========================================================================== */

html.js .reveal{
  opacity:0;
  transform:translateY(26px);
  filter:blur(5px);
  transition:opacity .8s var(--ease), transform .8s var(--ease), filter .8s var(--ease);
}
html.js .reveal[data-delay="1"]{ transition-delay:.1s; }
html.js .reveal[data-delay="2"]{ transition-delay:.2s; }
html.js .reveal[data-delay="3"]{ transition-delay:.3s; }
html.js .reveal[data-delay="4"]{ transition-delay:.42s; }
html.js .reveal.in-view{ opacity:1; transform:none; filter:none; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px;
  border-radius:0;
  font-weight:600; font-size:15px; letter-spacing:.01em;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease),
             background-color .25s var(--ease), border-color .25s var(--ease);
  position:relative; overflow:hidden;
  white-space:nowrap;
}

.btn-primary{
  background:var(--gradient);
  color:var(--ink);
  box-shadow:0 6px 26px rgba(34,199,194,.22);
}
.btn-primary::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(115deg, transparent 32%, rgba(255,255,255,.5) 50%, transparent 70%);
  transform:translateX(-130%);
  transition:transform .75s var(--ease);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 12px 38px rgba(34,199,194,.36); }
.btn-primary:hover::after{ transform:translateX(130%); }

.btn-ghost{
  border:1px solid var(--border-strong);
  color:var(--text);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{
  border-color:rgba(34,199,194,.55);
  background-color:rgba(34,199,194,.07);
  transform:translateY(-2px);
}

.btn-sm{ padding:9px 18px; font-size:13.5px; border-radius:0; }

/* ==========================================================================
   Navbar
   ========================================================================== */

.navbar{
  position:fixed; top:0; left:0; right:0; z-index:900;
  transition:background-color .35s var(--ease), border-color .35s var(--ease),
             backdrop-filter .35s var(--ease);
  border-bottom:1px solid transparent;
}
.navbar.scrolled{
  background:rgba(4,8,10,.72);
  -webkit-backdrop-filter:blur(18px) saturate(1.35);
  backdrop-filter:blur(18px) saturate(1.35);
  border-bottom-color:var(--border);
}

.nav-inner{
  max-width:var(--container); margin:0 auto; padding:0 28px;
  height:74px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}

.brand{ display:inline-flex; align-items:center; gap:11px; }
.brand-logo{ height:44px; width:auto; display:block; }
.brand-logo--footer{ height:36px; }

.nav-links{ display:flex; gap:6px; }
.nav-link{
  position:relative;
  font-size:14px; color:#ffffff;
  padding:9px 14px; border-radius:0;
  transition:color .25s var(--ease), background-color .25s var(--ease);
}
.nav-link:hover{ color:#ffffff; background:rgba(255,255,255,.06); }
.nav-link::after{
  content:"";
  position:absolute; left:50%; bottom:2px;
  width:0; height:2px; border-radius:0;
  background:var(--gradient);
  transform:translateX(-50%);
  transition:width .3s var(--ease);
}
.nav-link.active{ color:#ffffff; }
.nav-link.active::after{ width:16px; }

.nav-controls{ display:flex; align-items:center; gap:14px; }

.lang-switch{
  position:relative;
  display:flex;
  border:1px solid var(--border);
  border-radius:0;
  padding:3px;
  background:rgba(255,255,255,.03);
}
.lang-btn{
  position:relative; z-index:1;
  font-family:var(--font-mono);
  font-size:11.5px; font-weight:600; letter-spacing:.08em;
  padding:6px 13px;
  color:#ffffff;
  transition:color .25s var(--ease), opacity .25s var(--ease);
  opacity:.72;
}
.lang-btn.active{ color:#ffffff; opacity:1; }
.lang-thumb{
  position:absolute; top:3px; bottom:3px; left:3px;
  width:calc(50% - 3px);
  border-radius:0;
  background:rgba(255,255,255,.09);
  border:1px solid var(--border);
  transition:transform .3s var(--spring);
}
.lang-switch[data-active="en"] .lang-thumb{ transform:translateX(100%); }

.hamburger{
  display:none;
  flex-direction:column; justify-content:center; gap:5px;
  width:40px; height:40px; padding:8px;
  border:1px solid var(--border); border-radius:0;
}
.hamburger span{
  display:block; height:2px; width:100%;
  background:var(--text);
  border-radius:0;
  transition:transform .3s var(--ease), opacity .3s var(--ease);
}
.hamburger.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity:0; }
.hamburger.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

.mobile-menu{
  position:fixed; top:74px; left:0; right:0; z-index:890;
  background:rgba(4,8,10,.96);
  -webkit-backdrop-filter:blur(20px);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  padding:20px 28px 28px;
  display:flex; flex-direction:column;
  opacity:0; transform:translateY(-10px);
  pointer-events:none;
  transition:opacity .3s var(--ease), transform .3s var(--ease);
}
.mobile-menu.open{ opacity:1; transform:none; pointer-events:auto; }
.mobile-link{
  padding:15px 4px;
  font-size:16.5px; color:#ffffff;
  border-bottom:1px solid var(--border);
  transition:color .2s, padding-left .2s;
}
.mobile-link:hover{ color:#ffffff; padding-left:10px; }
.mobile-cta{ margin-top:20px; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero{
  position:relative;
  min-height:100svh;
  display:flex; align-items:center;
  padding:130px 0 90px;
  overflow:hidden;
}

/* --- video background (Mux HLS) --- */
.hero-bg{
  position:absolute; inset:0; z-index:0;
  overflow:hidden;
  background:var(--bg);
}
.hero-video{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  opacity:0;
  transition:opacity 1.2s var(--ease);
}
.hero--video-ready .hero-video{ opacity:1; }
.hero--no-video .hero-bg{ display:none; }
.hero-scrim{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(4,8,10,.9) 0%, rgba(4,8,10,.66) 34%, rgba(4,8,10,.26) 58%, rgba(4,8,10,.15) 76%, rgba(4,8,10,.15) 100%),
    linear-gradient(180deg, rgba(4,8,10,.42) 0%, rgba(4,8,10,0) 20%, rgba(4,8,10,0) 72%, var(--bg) 100%);
}

.hero-haze{
  transition:opacity 1.2s var(--ease);
}
.hero--video-ready .hero-haze{ opacity:0; }

.hero-haze{
  position:absolute; z-index:0; pointer-events:none;
  border-radius:0;
}
.hero-haze--a{
  width:60vw; height:60vw; max-width:900px; max-height:900px;
  top:-24%; right:-14%;
  background:radial-gradient(circle, rgba(34,179,232,.13), transparent 62%);
  animation:drift 30s ease-in-out infinite alternate;
}
.hero-haze--b{
  width:46vw; height:46vw; max-width:700px; max-height:700px;
  bottom:-26%; left:-12%;
  background:radial-gradient(circle, rgba(110,222,70,.09), transparent 60%);
  animation:drift 36s ease-in-out infinite alternate-reverse;
}
@keyframes drift{
  from{ transform:translate3d(0,0,0); }
  to{ transform:translate3d(-46px,36px,0); }
}

.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  align-items:center;
  width:100%;
}
.hero-copy{ max-width:760px; }

/* --- copy --- */
.tag{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px; font-weight:500; letter-spacing:.22em; text-transform:uppercase;
  color:var(--text-dim);
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  padding:9px 16px;
  border-radius:0;
}
.tag-dot{
  width:7px; height:7px; border-radius:0;
  background:var(--gradient);
  box-shadow:0 0 10px rgba(110,222,70,.8);
  animation:pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot{
  0%,100%{ transform:scale(1); opacity:1; }
  50%{ transform:scale(.68); opacity:.6; }
}

.hero-heading{
  margin-top:0;
  font-family:var(--font-display);
  font-size:clamp(2.55rem, 5.3vw, 4.35rem);
  font-weight:700;
  letter-spacing:-.025em;
  line-height:1.14;
}
.hero-heading span{ min-height:1.12em; }
#hero-line-italic{ white-space:pre-line; } /* \n u SR "veštačka\ninteligencija" → prelom reda */

.type-cursor{
  display:inline-block;
  width:3px; height:.92em;
  margin-left:6px;
  vertical-align:-.08em;
  background:var(--gradient);
  border-radius:0;
}
.animate-blink{ animation:blink 1s steps(2) infinite; }
@keyframes blink{ 50%{ opacity:0; } }

.hero-sub{
  margin-top:26px;
  max-width:560px;
  font-size:16.5px;
  line-height:1.72;
  color:var(--text-dim);
}

.hero-actions{
  margin-top:38px;
  display:flex; flex-wrap:wrap; gap:14px;
}

/* (Prsten je u potpunosti uklonjen 2026-07-17 — u kontakt kartici ga je
   zamenila slika sokraft-enter.webp sa heartbeat animacijom.) */

/* ==========================================================================
   Zasečen donji desni ugao — dugmad i box-ovi sa borderom
   ========================================================================== */

.btn,
.glass-card,
.stat-card,
.setup-panel,
.tag,
.part-tag,
.lang-switch,
.hamburger,
.to-top,
.session-toggle,
.field input,
.field textarea{
  --cut:14px;
  clip-path:polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%
  );
}
.btn{ --cut:12px; }
.btn-sm{ --cut:10px; }
.glass-card{ --cut:22px; }
.stat-card{ --cut:16px; }
.setup-panel{ --cut:22px; }
.tag{ --cut:9px; }
.part-tag{ --cut:8px; }
.lang-switch{ --cut:8px; }
.hamburger{ --cut:8px; }
.to-top{ --cut:10px; }
.session-toggle{ --cut:8px; }
.field input,
.field textarea{ --cut:12px; }

/* clip-path seče box-shadow — glow efekti prelaze na drop-shadow (prati zasečen oblik) */
.btn-primary{
  box-shadow:none;
  filter:drop-shadow(0 8px 22px rgba(34,199,194,.26));
  transition:transform .25s var(--ease), filter .25s var(--ease),
             background-color .25s var(--ease), border-color .25s var(--ease);
}
.btn-primary:hover{ box-shadow:none; filter:drop-shadow(0 12px 30px rgba(34,199,194,.4)); }
.glass-card{
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07);
  filter:drop-shadow(0 20px 34px rgba(0,0,0,.35));
}
.stat-card--highlight{
  box-shadow:none;
  filter:drop-shadow(0 14px 30px rgba(34,199,194,.3));
}
.stat-card--highlight:hover{ box-shadow:none; }
.stat-card:hover{ box-shadow:none; }

/* ==========================================================================
   Glass card
   ========================================================================== */

.glass-card{
  background:linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.018));
  border:1px solid var(--border);
  border-radius:0;
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  box-shadow:0 26px 70px rgba(0,0,0,.44), inset 0 1px 0 rgba(255,255,255,.07);
}

.card-eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono);
  font-size:10px; font-weight:500; letter-spacing:.24em; text-transform:uppercase;
  color:var(--text-dimmer);
}
.card-eyebrow::before{
  content:"";
  width:7px; height:7px;
  background:var(--gradient);
  border-radius:0;
  transform:rotate(45deg);
}

/* --- scroll cue --- */
.scroll-cue{
  position:absolute; left:50%; bottom:26px;
  transform:translateX(-50%);
  width:24px; height:38px;
  border:1.5px solid rgba(255,255,255,.12);
  border-radius:0;
  z-index:2;
}
.scroll-cue span{
  position:absolute; left:50%; top:7px;
  width:4px; height:7px;
  margin-left:-2px;
  border-radius:0;
  background:var(--gradient);
  animation:cue 2s var(--ease) infinite;
}
@keyframes cue{
  0%{ transform:translateY(0); opacity:1; }
  70%{ transform:translateY(13px); opacity:0; }
  100%{ transform:translateY(0); opacity:0; }
}

/* ==========================================================================
   Ticker
   ========================================================================== */

.ticker{
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:17px 0;
  overflow:hidden;
  background:rgba(255,255,255,.012);
  mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image:linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  position:relative; z-index:2;
}
.ticker-track{
  display:flex; width:max-content;
  animation:ticker 30s linear infinite;
}
.ticker:hover .ticker-track{ animation-play-state:paused; }
.ticker-item{
  font-family:var(--font-mono);
  font-size:12px; font-weight:500;
  letter-spacing:.3em; text-transform:uppercase;
  color:var(--text-dimmer);
  white-space:nowrap;
}
.ticker-item::after{ content:"\2022"; padding:0 1.1em 0 1.25em; }
@keyframes ticker{ to{ transform:translateX(-50%); } }

/* ==========================================================================
   Stats
   ========================================================================== */

.stats-section{ padding:64px 0 10px; position:relative; z-index:2; }

.stats-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:14px;
}
.stat-card{
  background:linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:0;
  padding:28px 22px 24px;
  transition:transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.stat-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,199,194,.4);
  box-shadow:0 16px 44px rgba(0,0,0,.4);
}
.stat-num{
  display:block;
  font-family:var(--font-display);
  font-size:clamp(1.7rem, 2.4vw, 2.35rem);
  font-weight:500;
  letter-spacing:-.02em;
  line-height:1.1;
  white-space:nowrap;
}
.stat-label{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:10px; font-weight:500;
  letter-spacing:.16em; text-transform:uppercase;
  color:var(--text-dimmer);
}

.stat-card--highlight{
  background:var(--gradient);
  background-size:170% 170%;
  border:none;
  box-shadow:0 18px 54px rgba(34,199,194,.26);
  animation:grad-shift 9s ease-in-out infinite;
}
.stat-card--highlight:hover{ box-shadow:0 22px 60px rgba(34,199,194,.4); border:none; }
.stat-card--highlight .stat-num{ color:var(--ink); font-weight:600; }
.stat-card--highlight .stat-label{ color:rgba(3,20,15,.72); }
@keyframes grad-shift{
  0%,100%{ background-position:0% 50%; }
  50%{ background-position:100% 50%; }
}

/* ==========================================================================
   Sections — shared
   ========================================================================== */

.section{ padding:130px 0 0; position:relative; }
.section:last-of-type{ padding-bottom:0; }

.section-glow{
  position:absolute; z-index:0; pointer-events:none;
  width:1160px; height:1160px; border-radius:0;
  opacity:.7;
  animation:drift 32s ease-in-out infinite alternate;
}
.section-glow--left{
  left:-380px; top:-120px;
  background:radial-gradient(circle, rgba(110,222,70,.3), transparent 70%);
}
.section-glow--right{
  right:-380px; top:4%;
  background:radial-gradient(circle, rgba(34,179,232,.32), transparent 70%);
}
.section-glow--left-teal{
  left:-380px; top:-780px; /* centar glow-a ~200px iznad vrha sekcije */
  background:radial-gradient(circle, rgba(34,199,194,.3), transparent 70%);
}
.section-glow--right-green{
  right:-380px; top:4%;
  background:radial-gradient(circle, rgba(110,222,70,.28), transparent 70%);
}

#contact .section-glow{ top:auto; bottom:-100px; } /* ostaje iza footera, ne produzava stranicu */

.section-head{ max-width:720px; margin-bottom:64px; }

.eyebrow{
  display:inline-flex; align-items:center; gap:12px;
  font-family:var(--font-mono);
  font-size:11px; font-weight:500;
  letter-spacing:.26em; text-transform:uppercase;
  color:var(--text-dim);
}
.eyebrow::before{
  content:"";
  width:26px; height:1.5px;
  background:var(--gradient);
  border-radius:0;
}

.section-title{
  margin-top:18px;
  font-family:var(--font-display);
  font-size:clamp(2.05rem, 3.9vw, 3.25rem);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.1;
}

/* ==========================================================================
   Course setup
   ========================================================================== */

.setup-grid{
  display:grid;
  grid-template-columns:1fr 1.06fr;
  gap:22px;
  align-items:start;
}
.setup-cards{ display:grid; gap:22px; }

.setup-card{ padding:32px 32px 28px; }
.card-title{
  font-family:var(--font-display);
  font-size:1.22rem; font-weight:600; letter-spacing:-.01em;
  margin-bottom:20px;
}
.entry{
  display:flex; gap:14px;
  padding:14px 0;
}
.entry + .entry{ border-top:1px solid var(--border); }
.entry p{ font-size:14.8px; line-height:1.68; color:var(--text-dim); }
.entry-icon{
  flex-shrink:0;
  display:inline-flex; align-items:center; justify-content:center;
  width:26px; height:26px;
  border-radius:0;
  margin-top:2px;
}
.entry-icon svg{ width:13px; height:13px; }
.entry-pos .entry-icon{
  color:var(--g1);
  background:rgba(110,222,70,.09);
  border:1px solid rgba(110,222,70,.32);
  box-shadow:0 0 14px rgba(110,222,70,.12);
}
.entry-neg .entry-icon{
  color:var(--danger);
  background:rgba(242,114,107,.08);
  border:1px solid rgba(242,114,107,.3);
}

.setup-panel{
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.016));
  border:1px solid var(--border);
  border-radius:0;
  overflow:hidden;
}
.panel-row{
  display:flex; gap:22px;
  padding:27px 30px;
  transition:background-color .3s var(--ease);
}
.panel-row + .panel-row{ border-top:1px solid var(--border); }
.panel-row:hover{ background:rgba(255,255,255,.028); }
.panel-index{
  flex-shrink:0;
  font-family:var(--font-mono);
  font-size:13px; font-weight:600;
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  padding-top:3px;
}
.panel-row p{ font-size:14.8px; line-height:1.7; color:var(--text-dim); }

/* ==========================================================================
   Curriculum
   ========================================================================== */

.curr-part{ margin-top:56px; }
.curr-part:first-of-type{ margin-top:0; }

.part-head{
  display:flex; align-items:center; gap:16px;
  margin-bottom:10px;
}
.part-tag{
  font-family:var(--font-mono);
  font-size:10.5px; font-weight:500;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--text-dim);
  border:1px solid var(--border-strong);
  padding:6px 13px;
  border-radius:0;
  background:rgba(255,255,255,.025);
}
.part-title{ font-family:var(--font-display); font-size:1.42rem; font-weight:600; letter-spacing:-.015em; }

.session{ border-bottom:1px solid var(--border); }
.session:first-of-type{ border-top:1px solid var(--border); }

.session-head{
  width:100%;
  display:grid;
  grid-template-columns:62px 1fr 38px;
  align-items:center;
  gap:14px;
  padding:22px 10px;
  text-align:left;
  transition:background-color .25s var(--ease), padding-left .25s var(--ease);
  border-radius:0;
}
.session-head:hover{ background:rgba(255,255,255,.026); padding-left:16px; }

.session-num{
  font-family:var(--font-mono);
  font-size:13px; font-weight:500;
  color:var(--text-dimmer);
  transition:color .25s var(--ease);
}
.session-head:hover .session-num{ color:var(--g2); }
.session-head[aria-expanded="true"] .session-num{
  background:var(--gradient);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:600;
}

.session-title{ font-size:16.5px; font-weight:500; letter-spacing:-.008em; }

.session-toggle{
  position:relative;
  width:32px; height:32px;
  border:1px solid var(--border-strong);
  border-radius:0;
  justify-self:end;
  transition:border-color .3s var(--ease), transform .45s var(--spring), background-color .3s var(--ease);
}
.session-toggle::before,
.session-toggle::after{
  content:"";
  position:absolute; top:50%; left:50%;
  background:var(--text-dim);
  border-radius:0;
  transition:background-color .3s var(--ease);
}
.session-toggle::before{ width:12px; height:1.6px; transform:translate(-50%,-50%); }
.session-toggle::after{ width:1.6px; height:12px; transform:translate(-50%,-50%); }
.session-head:hover .session-toggle{ border-color:rgba(34,199,194,.55); }
.session-head[aria-expanded="true"] .session-toggle{
  transform:rotate(135deg);
  border-color:rgba(34,199,194,.65);
  background-color:rgba(34,199,194,.08);
}
.session-head[aria-expanded="true"] .session-toggle::before,
.session-head[aria-expanded="true"] .session-toggle::after{ background:var(--g2); }

.session-body{
  max-height:0;
  overflow:hidden;
  transition:max-height .55s var(--ease);
}
.session-body p{
  padding:4px 46px 28px 86px;
  font-size:15px; line-height:1.75;
  color:var(--text-dim);
}

/* ==========================================================================
   About
   ========================================================================== */

.about-layout{
  display:grid;
  grid-template-columns:.92fr 1.08fr;
  gap:76px;
  align-items:start;
}

.about-right p{
  font-size:15.5px; line-height:1.78;
  color:var(--text-dim);
}
.about-right p + p{ margin-top:24px; }
.about-right p:last-child{ color:var(--text); }

.orb-trio{
  --hex:polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display:flex; align-items:center;
  margin-top:60px;
  padding-left:6px;
}
.orb-disc{
  flex-shrink:0;
  position:relative;
  clip-path:var(--hex);
}
.orb-disc--dark{
  background:rgba(255,255,255,.12);
}
.orb-disc--dark::before{
  content:"";
  position:absolute; inset:1.5px;
  clip-path:var(--hex);
  background:radial-gradient(circle at 36% 30%, #14262b, #071114 76%);
}
.orb-disc--a{
  width:132px; height:152px;
  animation:float-a 7s ease-in-out infinite;
}
.orb-disc--c{
  width:104px; height:120px;
  margin-left:-22px;
  animation:float-a 8.5s ease-in-out infinite reverse;
}
.orb-disc--glow{
  width:186px; height:215px;
  margin-left:-28px;
  z-index:1;
  display:flex; align-items:center; justify-content:center;
  background:var(--gradient);
  filter:drop-shadow(0 0 30px rgba(34,199,194,.4)) drop-shadow(0 0 80px rgba(34,179,232,.2));
  animation:float-b 6s ease-in-out infinite;
}
.orb-disc--glow::before{
  content:"";
  position:absolute; inset:2.5px;
  clip-path:var(--hex);
  background:radial-gradient(circle at 40% 32%, #0c181b, #060d0f 76%);
}
.orb-disc--glow img{
  position:relative; z-index:1;
  width:52px; height:auto;
  filter:drop-shadow(0 0 18px rgba(110,222,70,.45));
}
@keyframes float-a{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(-16px); }
}
@keyframes float-b{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(-21px); }
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-layout{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:70px;
  align-items:start;
}

.contact-desc{
  margin-top:22px;
  font-size:15.5px; line-height:1.7;
  color:var(--text-dim);
  max-width:460px;
}

.contact-email{ font-weight:500; color:var(--accent); }
.contact-email:hover{ text-decoration:underline; }

.form{ margin-top:36px; max-width:520px; }

.field{ position:relative; margin-top:24px; }
.field:first-of-type{ margin-top:0; }

.field input,
.field textarea{
  width:100%;
  background:rgba(255,255,255,.028);
  border:1px solid var(--border);
  border-radius:0;
  padding:16px 16px;
  font-size:15px;
  color:var(--text);
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease), background-color .3s var(--ease);
  resize:vertical;
}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:rgba(34,199,194,.6);
  box-shadow:0 0 0 3px rgba(34,199,194,.12);
  background-color:rgba(255,255,255,.04);
}

.field label{
  position:absolute; left:13px; top:15px;
  font-size:15px; color:var(--text-dimmer);
  pointer-events:none;
  padding:0 5px;
  transition:transform .25s var(--ease), font-size .25s var(--ease),
             color .25s var(--ease), background-color .25s var(--ease);
  transform-origin:left top;
  border-radius:0;
}
.field input:focus + label,
.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label{
  transform:translateY(-24px) scale(.8);
  background:var(--bg);
  color:var(--g2);
}

.form-submit{ margin-top:30px; min-width:220px; }
.form.is-loading .form-submit{ opacity:.7; pointer-events:none; }
.form-hp{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.form-captcha{ margin-top:24px; min-height:65px; }

.form-note{ margin-top:14px; font-size:13px; line-height:1.6; color:var(--text-dimmer); }
.form-note a{ color:var(--text-dim); text-decoration:underline; }
.form-note a:hover{ color:var(--text); }

.form-success{
  margin-top:16px;
  font-size:14px;
  color:var(--g1);
  opacity:0;
  transform:translateY(4px);
  transition:opacity .4s var(--ease), transform .4s var(--ease);
}
.form-success.show{ opacity:1; transform:none; }

.form-error{ display:none; margin-top:16px; font-size:14px; color:#e5484d; }
.form-error.show{ display:block; }

.contact-visual{
  padding:52px 40px 46px;
  display:flex; flex-direction:column; align-items:center;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.contact-visual::before{
  content:"";
  position:absolute; inset:-40% -30% auto;
  height:120%;
  background:radial-gradient(circle at 50% 30%, rgba(34,199,194,.12), transparent 60%);
  pointer-events:none;
}
/* --- Enter taster slika sa heartbeat pulsom --- */
.enter-img{
  width:190px; height:auto;
  margin-bottom:30px;
  animation:heartbeat 1.7s ease-in-out infinite;
  filter:drop-shadow(0 0 34px rgba(34,199,194,.3));
  will-change:transform;
}
@keyframes heartbeat{
  0%, 45%, 100%{ transform:scale(1); }
  10%{ transform:scale(1.08); }
  20%{ transform:scale(1); }
  30%{ transform:scale(1.08); }
}

.join-heading{
  font-family:var(--font-display);
  font-size:1.85rem; font-weight:700; letter-spacing:-.02em; line-height:1.18;
}

.mini-stats{
  display:flex; gap:34px;
  margin-top:32px;
}
.mini-stat{ display:flex; flex-direction:column; gap:5px; }
.mini-stat strong{
  font-family:var(--font-display);
  font-size:1.4rem; font-weight:600; letter-spacing:-.015em;
  white-space:nowrap;
}
.mini-stat span{
  font-family:var(--font-mono);
  font-size:9.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--text-dimmer);
}

/* ==========================================================================
   Legal page
   ========================================================================== */
html[lang="en"] .legal[lang="sr"],
html:not([lang="en"]) .legal[lang="en"]{ display:none; }

.legal{
  max-width:760px;
  margin-inline:auto;
  padding-top:132px;
  font-size:15.5px; line-height:1.75;
  color:var(--text-dim);
  overflow-wrap:anywhere;
}
.legal h1{
  font-family:var(--font-display);
  font-size:clamp(2rem, 5vw, 2.8rem); font-weight:700; letter-spacing:-.02em; line-height:1.15;
  color:var(--text);
}
.legal-date{ margin-top:12px; font-size:13px; color:var(--text-dimmer); }
.legal h2{
  margin-top:44px;
  font-family:var(--font-display);
  font-size:1.3rem; font-weight:600; letter-spacing:-.01em; line-height:1.3;
  color:var(--text);
}
.legal > p, .legal > ul{ margin-top:14px; }
.legal-date + p{ margin-top:32px; }
.legal ul{ padding-left:20px; list-style:disc; }
.legal li{ margin-top:8px; }
.legal strong{ font-weight:600; color:var(--text); }
.legal a{ color:var(--accent); }
.legal a:hover{ text-decoration:underline; }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer{
  margin-top:130px;
  border-top:1px solid var(--border);
  padding:36px 0 22px;
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg, transparent, rgba(255,255,255,.014));
}
.footer--tight{ margin-top:56px; }
.footer-inner{
  display:flex; flex-wrap:wrap; align-items:flex-start; justify-content:space-between;
  gap:16px;
}
.footer-brand-row{
  display:flex; align-items:center; gap:22px;
}
.footer-tagline{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:10.5px; letter-spacing:.2em; text-transform:uppercase;
  color:var(--text-dimmer);
}
.footer-links{ display:flex; gap:26px; flex-wrap:wrap; }
.footer-links a{
  font-size:14px; color:var(--text-dim);
  transition:color .25s var(--ease);
}
.footer-links a:hover{ color:var(--text); }
.footer-copy{ font-size:13px; color:var(--text-dimmer); width:100%; margin-top:12px; }

/* ==========================================================================
   To top
   ========================================================================== */

.to-top{
  position:fixed; right:24px; bottom:24px; z-index:880;
  width:46px; height:46px;
  display:flex; align-items:center; justify-content:center;
  border:1px solid var(--border-strong);
  border-radius:0;
  background:rgba(6,13,16,.8);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  color:var(--text-dim);
  opacity:0; transform:translateY(12px);
  pointer-events:none;
  transition:opacity .35s var(--ease), transform .35s var(--ease),
             border-color .25s var(--ease), color .25s var(--ease);
}
.to-top svg{ width:18px; height:18px; }
.to-top.visible{ opacity:1; transform:none; pointer-events:auto; }
.to-top:hover{ border-color:rgba(34,199,194,.6); color:var(--text); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width:1120px){
  .about-layout{ gap:52px; }
  .contact-layout{ gap:48px; }
}

@media (max-width:1000px){
  .hero{ padding:120px 0 70px; min-height:auto; }
  .hero-scrim{
    background:
      linear-gradient(180deg, rgba(4,8,10,.68) 0%, rgba(4,8,10,.4) 30%, rgba(4,8,10,.34) 66%, var(--bg) 100%);
  }
  .scroll-cue{ display:none; }

  .setup-grid{ grid-template-columns:1fr; }
  .about-layout{ grid-template-columns:1fr; gap:44px; }
  .orb-trio{ margin-top:44px; }
  .contact-layout{ grid-template-columns:1fr; gap:52px; }
  .contact-visual{ max-width:520px; margin-inline:auto; }
}

@media (max-width:900px){
  .nav-links, .nav-cta{ display:none; }
  .hamburger{ display:flex; }
}

@media (max-width:640px){
  .container{ padding:0 20px; }
  .nav-inner{ padding:0 20px; height:68px; }
  .mobile-menu{ top:68px; }
  #setup, #lessons, #about, #contact{ scroll-margin-top:74px; }

  .hero{ padding:104px 0 56px; }
  .hero-heading{ font-size:clamp(2.15rem, 9vw, 2.8rem); }
  .hero-sub{ font-size:15.5px; }
  .hero-actions .btn{ flex:1 1 100%; }

  .section{ padding:92px 0 0; }
  .section:last-of-type{ padding-bottom:0; }
  .section-head{ margin-bottom:44px; }
  .stats-section{ padding:64px 0 6px; }
  .stats-grid{ grid-template-columns:repeat(2, 1fr); gap:11px; }
  .stat-card{ padding:22px 18px 20px; }

  .setup-card{ padding:24px 22px 20px; }
  .panel-row{ padding:22px 20px; gap:16px; }

  .part-head{ flex-direction:column; align-items:flex-start; gap:10px; margin-bottom:14px; }
  .session-head{ grid-template-columns:44px 1fr 34px; padding:18px 4px; gap:10px; }
  .session-head:hover{ padding-left:8px; }
  .session-title{ font-size:15px; }
  .session-toggle{ width:28px; height:28px; }
  .session-body p{ padding:2px 8px 24px 58px; }

  .contact-visual{ padding:40px 24px 36px; }
  .mini-stats{ gap:22px; }
  .enter-img{ width:180px; margin-bottom:24px; }
  .section-glow{ width:680px; height:680px; }
  .orb-disc--a{ width:104px; height:120px; }
  .orb-disc--glow{ width:150px; height:173px; margin-left:-22px; }
  .orb-disc--glow img{ width:42px; }
  .orb-disc--c{ width:82px; height:95px; margin-left:-18px; }

  .footer{ margin-top:92px; padding:28px 0 18px; }
  .footer--tight{ margin-top:40px; }
  .to-top{ right:16px; bottom:16px; }
}

@media (max-width:420px){
  .session-body p{ padding-left:48px; padding-right:4px; }
  .mini-stats{ flex-wrap:wrap; justify-content:center; }
}

/* ==========================================================================
   Dijagonalna ivica u zasečenom uglu
   (clip-path seče CSS border, pa se linija ivice u zaseku docrtava
   background gradientom u uglu — boja prati border preko --cut-bc)
   ========================================================================== */

:root{
  --cut-line:linear-gradient(to bottom right,
    transparent calc(50% - .7px),
    var(--cut-bc, var(--border-strong)) calc(50% - .7px),
    var(--cut-bc, var(--border-strong)) calc(50% + .7px),
    transparent calc(50% + .7px));
}

.btn-ghost, .part-tag, .lang-switch, .hamburger, .to-top, .session-toggle,
.field input, .field textarea{
  background-image:var(--cut-line);
  background-size:var(--cut) var(--cut);
  background-position:100% 100%;
  background-repeat:no-repeat;
}
.btn-ghost, .part-tag, .to-top, .session-toggle{ --cut-bc:var(--border-strong); }
.lang-switch, .hamburger,
.field input, .field textarea{ --cut-bc:var(--border); }

.glass-card{
  --cut-bc:var(--border);
  background-image:var(--cut-line), linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.018));
  background-size:var(--cut) var(--cut), 100% 100%;
  background-position:100% 100%, 0 0;
  background-repeat:no-repeat, no-repeat;
}
.stat-card:not(.stat-card--highlight){
  --cut-bc:var(--border);
  background-image:var(--cut-line), linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
  background-size:var(--cut) var(--cut), 100% 100%;
  background-position:100% 100%, 0 0;
  background-repeat:no-repeat, no-repeat;
}
.setup-panel{
  --cut-bc:var(--border);
  background-image:var(--cut-line), linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.016));
  background-size:var(--cut) var(--cut), 100% 100%;
  background-position:100% 100%, 0 0;
  background-repeat:no-repeat, no-repeat;
}

/* boja dijagonale prati hover/focus/aktivna stanja bordera */
.btn-ghost:hover{ --cut-bc:rgba(34,199,194,.55); }
.stat-card:hover{ --cut-bc:rgba(34,199,194,.4); }
.to-top:hover{ --cut-bc:rgba(34,199,194,.6); }
.session-head:hover .session-toggle{ --cut-bc:rgba(34,199,194,.55); }
.session-head[aria-expanded="true"] .session-toggle{ --cut-bc:rgba(34,199,194,.65); }
.field input:focus,
.field textarea:focus{ --cut-bc:rgba(34,199,194,.6); }

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{ opacity:1; transform:none; filter:none; }
  .ticker-track{ animation:none; }
  .hero-bg, .cursor-glow{ display:none; }
}