/* ============================================================
   LUMEN EDU — design system v2
   Cool platinum-glass palette: soft lavender / periwinkle blue
   aurora over a platinum-white surface, deep graphite-navy for
   contrast sections, indigo-violet as the single accent ink.
   Signature: a slow-drifting holographic aurora behind headlines,
   and frosted-glass panels throughout — light refracting through
   glass, which is what "lumen" now stands for.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Onest:wght@300;400;500;600;700&family=Unbounded:wght@300;400;500;600;700&family=Manrope:wght@400;500;600;700&display=swap');

:root{
  /* --- color --- */
  --ivory:        #F2F3F8;   /* cool platinum surface */
  --ivory-soft:   #FFFFFF;   /* card white */
  --ivory-deep:   #E7E9F3;   /* deeper cool panel */
  --glass:        rgba(255,255,255,.58);
  --glass-strong: rgba(255,255,255,.8);
  --ink:          #14141D;
  --ink-soft:     #4C4C60;
  --ink-faint:    #8B8BA3;
  --gold:         #8DA3EF;   /* cool periwinkle — primary accent */
  --gold-bright:  #ABB9F8;   /* light periwinkle — glow / bright */
  --gold-pale:    #E1E4FB;   /* pale lavender — borders / pills */
  --gold-deep:    #5A4FD1;   /* indigo-violet — labels / numbers */
  --bronze:       #0F0F1A;   /* deep graphite-navy, dark sections */
  --bronze-soft:  #1B1B2C;
  --line:         rgba(20,20,29,0.1);
  --line-on-dark: rgba(255,255,255,0.13);

  --aurora-1: rgba(171,185,248,.55);
  --aurora-2: rgba(201,191,245,.5);
  --aurora-3: rgba(159,206,245,.45);

  /* --- type --- */
  --f-display: 'Onest', 'Manrope', sans-serif;
  --f-mono:    'Unbounded', sans-serif;
  --f-body:    'Manrope', sans-serif;

  /* --- scale --- */
  --container: 1180px;
  --radius-s: 4px;
  --radius-m: 12px;
  --radius-l: 26px;

  --ease: cubic-bezier(.22,1,.36,1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

body{
  margin:0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* soft fixed color wash behind everything — gives glass panels
   something to refract wherever they sit on the page */
body::after{
  content:"";
  position: fixed; inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(640px circle at 12% 15%, rgba(171,185,248,.16), transparent 62%),
    radial-gradient(720px circle at 88% 30%, rgba(201,191,245,.14), transparent 60%),
    radial-gradient(600px circle at 30% 85%, rgba(159,206,245,.13), transparent 62%),
    radial-gradient(500px circle at 80% 90%, rgba(201,191,245,.1), transparent 60%);
}

/* faint grain for texture, kept very subtle over the cool surface */
body::before{
  content:"";
  position: fixed; inset:0;
  pointer-events:none;
  z-index: 999;
  opacity:.025;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* cursor glow — desktop only */
.cursor-glow{
  position: fixed;
  width: 480px; height: 480px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(circle, rgba(171,185,248,0.18) 0%, rgba(171,185,248,0) 68%);
  transform: translate(-50%,-50%);
  left: -1000px; top: -1000px;
  transition: opacity .4s var(--ease);
}
@media (hover:none){ .cursor-glow{ display:none; } }

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family:inherit; }

h1,h2,h3,h4{
  font-family: var(--f-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0 0 .5em;
  letter-spacing: -0.02em;
}
h1{ font-size: clamp(2.6rem, 5.4vw, 4.9rem); font-weight: 600; }
h2{ font-size: clamp(2rem, 3.6vw, 3rem); }
h3{ font-size: clamp(1.25rem, 2vw, 1.55rem); font-weight: 600; }
p{ margin: 0 0 1em; color: var(--ink-soft); }

.eyebrow{
  font-family: var(--f-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-deep);
  display: inline-flex;
  align-items: center;
  gap: .6em;
  margin-bottom: 1.1em;
  font-weight: 500;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px;
  background: var(--gold);
}

.container{ max-width: var(--container); margin: 0 auto; padding: 0 32px; }
section{ position: relative; }

/* ---------- buttons ---------- */
.btn{
  font-family: var(--f-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  padding: 1.05em 1.9em;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .45s var(--ease);
  white-space: nowrap;
  font-weight: 500;
}
.btn-gold{
  background: linear-gradient(135deg, #C7D0FA, #93AEF2);
  color: var(--ink);
  box-shadow: 0 10px 30px -10px rgba(90,79,209,.35);
}
.btn-gold:hover{ transform: translateY(-2px); box-shadow: 0 16px 34px -8px rgba(90,79,209,.45); }
.btn-ghost{
  border-color: var(--line);
  color: var(--ink);
  background: var(--glass);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover{ border-color: var(--gold); color: var(--gold-deep); }
.btn-ghost-dark{
  border-color: var(--line-on-dark);
  color: var(--ivory);
}
.btn-ghost-dark:hover{ border-color: var(--gold-bright); color: var(--gold-bright); }
.btn-arrow{ transition: transform .4s var(--ease); }
.btn:hover .btn-arrow{ transform: translateX(4px); }

/* ---------- nav ---------- */
.site-nav{
  position: fixed; top:0; left:0; right:0; z-index: 500;
  padding: 26px 0;
  transition: padding .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-nav.scrolled{
  padding: 15px 0;
  background: rgba(242,243,248,0.78);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
}
.site-nav .container{ display:flex; align-items:center; justify-content:space-between; }
.logo{
  font-family: var(--f-mono);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: .03em;
  display:flex; align-items:center; gap:.55em;
}
.logo .spark{
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--gold-bright);
  box-shadow: 0 0 12px 3px rgba(171,185,248,.85);
}
.nav-links{ display:flex; align-items:center; gap: 2.6em; }
.nav-links a{
  font-family: var(--f-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  position: relative;
  padding-bottom: 4px;
}
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background: var(--gold); transition: right .35s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after{ right:0; }
.nav-links a.active{ color: var(--ink); }
.nav-cta{ display:flex; align-items:center; gap: 1.6em; }
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; padding:6px; }
.nav-toggle span{ display:block; width:22px; height:1px; background:var(--ink); margin:5px 0; transition: all .3s var(--ease); }

@media (max-width: 900px){
  .nav-links{
    position: fixed; inset: 0 0 0 auto; width: min(78vw, 340px);
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(20px);
    flex-direction: column; align-items: flex-start;
    padding: 110px 40px 40px;
    gap: 2em;
    transform: translateX(100%);
    transition: transform .5s var(--ease);
    box-shadow: -30px 0 60px rgba(20,20,29,.1);
  }
  .nav-links.open{ transform: translateX(0); }
  .nav-toggle{ display:block; }
  .nav-cta .btn-ghost{ display:none; }
}

/* ---------- hero aurora (signature) ---------- */
.beam-field{
  position: absolute; inset: -10%;
  overflow: hidden;
  pointer-events: none;
  filter: blur(70px);
}
.beam{
  position: absolute;
  width: 900px; height: 900px;
  top: -220px; left: 6%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, var(--aurora-1), transparent 60%),
    radial-gradient(circle at 68% 65%, var(--aurora-2), transparent 62%);
  animation: float-a 20s ease-in-out infinite alternate;
  opacity: .9;
}
.beam-glow{
  position:absolute; width:640px; height:640px;
  top: 12%; right: 4%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--aurora-3), transparent 65%);
  animation: float-b 24s ease-in-out infinite alternate;
  opacity: .85;
}
@keyframes float-a{ from{ transform: translate(0,0) scale(1); } to{ transform: translate(70px,50px) scale(1.1); } }
@keyframes float-b{ from{ transform: translate(0,0) scale(1); } to{ transform: translate(-60px,-40px) scale(1.06); } }

/* ---------- reveal on scroll ---------- */
.reveal{ opacity:0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in{ opacity:1; transform: translateY(0); }
.reveal-stagger > *{ opacity:0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal-stagger.in > *{ opacity:1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(1){ transition-delay: .05s; }
.reveal-stagger.in > *:nth-child(2){ transition-delay: .14s; }
.reveal-stagger.in > *:nth-child(3){ transition-delay: .23s; }
.reveal-stagger.in > *:nth-child(4){ transition-delay: .32s; }
.reveal-stagger.in > *:nth-child(5){ transition-delay: .41s; }

/* ---------- glass cards / grid ---------- */
.card{
  background: var(--glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-l);
  padding: 2.2em;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
}
.card:hover{
  transform: translateY(-6px);
  border-color: var(--gold-pale);
  box-shadow: 0 30px 60px -30px rgba(90,79,209,.28);
}

/* ---------- dark section ---------- */
.section-dark{
  background: var(--bronze);
  color: var(--ivory);
}
.section-dark p{ color: rgba(242,243,248,.66); }
.section-dark .eyebrow{ color: var(--gold-bright); }

/* ---------- stats strip ---------- */
.stats{
  display:grid; grid-template-columns: repeat(4,1fr); gap: 1px;
  background: rgba(255,255,255,.5);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-l);
  overflow:hidden;
  backdrop-filter: blur(20px);
}
.stat{
  background: var(--glass);
  padding: 2.4em 1.6em;
  text-align:center;
}
.stat .num{
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 2.5rem;
  color: var(--gold-deep);
  display:block;
  margin-bottom:.15em;
}
.stat .lbl{
  font-family: var(--f-mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
  text-transform: uppercase;
  line-height:1.4;
}
@media (max-width: 800px){ .stats{ grid-template-columns: repeat(2,1fr); } }

/* ---------- footer ---------- */
.site-footer{
  background: var(--bronze);
  color: rgba(242,243,248,.6);
  padding: 80px 0 30px;
}
.site-footer .logo{ color: var(--ivory); margin-bottom: 1.2em; }
.footer-grid{
  display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 3em;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line-on-dark);
}
.footer-grid h4{
  font-family: var(--f-mono); font-size:.7rem; letter-spacing:.14em;
  text-transform: uppercase; color: var(--gold-bright); font-weight:500; margin-bottom: 1.3em;
}
.footer-grid a, .footer-grid p{ color: rgba(242,243,248,.62); font-size:.95rem; }
.footer-grid li{ margin-bottom: .8em; }
.footer-grid a:hover{ color: var(--gold-bright); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top: 26px;
  font-family: var(--f-mono); font-size:.7rem; letter-spacing:.03em;
  color: rgba(242,243,248,.4);
  flex-wrap: wrap; gap: 1em;
}
@media (max-width: 760px){ .footer-grid{ grid-template-columns: 1fr; gap:2.2em; } }

/* ---------- page header (inner pages) ---------- */
.page-header{
  padding: 200px 0 90px;
  position: relative;
  overflow:hidden;
}
.page-header .container{ position:relative; z-index:2; }
.page-header .kicker-line{
  max-width: 620px;
}

/* ---------- flag badges ---------- */
.flag-icon{
  width: 30px; height: 20px;
  border-radius: 5px;
  overflow: hidden;
  flex: none;
  box-shadow: 0 3px 10px rgba(20,20,29,.18), inset 0 0 0 1px rgba(255,255,255,.5);
}
.flag-icon svg{ display:block; width:100%; height:100%; }

/* ---------- destinations tabs ---------- */
.dest-shell{
  display:grid; grid-template-columns: 300px 1fr; gap: 0;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-l);
  overflow:hidden;
  background: var(--glass);
  backdrop-filter: blur(24px);
}
.dest-tabs{
  border-right: 1px solid var(--line);
  background: rgba(231,233,243,.6);
}
.dest-tab{
  width:100%; text-align:left;
  padding: 1.5em 1.7em;
  background:none; border:none; cursor:pointer;
  border-bottom: 1px solid var(--line);
  display:flex; align-items:center; justify-content: space-between;
  gap: 1em;
  transition: background .35s var(--ease), padding-left .35s var(--ease);
}
.dest-tab:last-child{ border-bottom:none; }
.dest-tab .name-row{ display:flex; align-items:center; gap:.9em; }
.dest-tab .name{
  font-family: var(--f-display); font-weight:600;
  font-size: 1.1rem; color: var(--ink);
}
.dest-tab .tag{
  font-family: var(--f-mono); font-size: .64rem; letter-spacing:.04em;
  color: var(--ink-faint); text-transform: uppercase; display:block; margin-top:.35em;
}
.dest-tab .dot{
  width: 8px; height:8px; border-radius:50%;
  background: var(--line); flex: none;
  transition: background .35s var(--ease), box-shadow .35s var(--ease);
}
.dest-tab.active{ background: rgba(255,255,255,.65); padding-left: 2.1em; }
.dest-tab.active .dot{ background: var(--gold-bright); box-shadow: 0 0 10px 2px rgba(171,185,248,.75); }
.dest-tab:hover .name{ color: var(--gold-deep); }

.dest-panels{ position: relative; }
.dest-panel{
  display:none;
  padding: 3em 3.2em;
  animation: panel-in .6s var(--ease);
}
.dest-panel.active{ display:block; }
.dest-panel .panel-title{ display:flex; align-items:center; gap: 1em; }
@keyframes panel-in{ from{ opacity:0; transform: translateY(10px);} to{opacity:1; transform:translateY(0);} }
.dest-panel .price-tag{
  display:inline-flex; align-items:baseline; gap:.4em;
  font-family: var(--f-mono);
  background: var(--bronze); color: var(--gold-pale);
  padding: .55em 1.1em; border-radius: 999px;
  font-size: .76rem; letter-spacing:.03em;
  margin-bottom: 1.6em;
}
.dest-panel .price-tag b{ font-size: 1rem; color: var(--gold-bright); }
.dest-perks{ display:grid; gap: 1.4em; margin-top: 1.8em; }
.dest-perk{ display:grid; grid-template-columns: auto 1fr; gap: 1em; align-items:flex-start; }
.dest-perk .mark{
  width: 30px; height:30px; border-radius:50%;
  border:1px solid var(--gold-pale);
  background: rgba(255,255,255,.5);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--f-mono); font-size: .66rem; color: var(--gold-deep); flex:none;
  margin-top: .15em;
}
.dest-perk strong{ display:block; color: var(--ink); font-family: var(--f-body); font-weight:700; margin-bottom:.2em; }
.dest-perk p{ margin:0; font-size: .96rem; }

@media (max-width: 860px){
  .dest-shell{ grid-template-columns: 1fr; }
  .dest-tabs{ display:flex; overflow-x:auto; border-right:none; border-bottom:1px solid var(--line); }
  .dest-tab{ border-bottom:none; border-right:1px solid var(--line); white-space:nowrap; }
  .dest-tab.active{ padding-left: 1.7em; }
  .dest-panel{ padding: 2.2em 1.6em; }
}

/* ---------- timeline (process) ---------- */
.timeline{ position:relative; }
.timeline::before{
  content:""; position:absolute; left: 27px; top: 10px; bottom: 10px; width:1px;
  background: linear-gradient(var(--gold-pale), var(--line-on-dark) 90%);
}
.tl-step{ display:grid; grid-template-columns: 56px 1fr; gap: 1.8em; padding-bottom: 3.4em; position:relative; }
.tl-step:last-child{ padding-bottom:0; }
.tl-num{
  width:56px; height:56px; border-radius:50%;
  background: rgba(255,255,255,.06); border:1px solid var(--gold-pale);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--f-display); font-weight:700; color: var(--gold-bright);
  font-size: 1.15rem; position:relative; z-index:1;
}
.tl-step h3{ margin-bottom:.4em; }
.tl-step .tl-meta{
  font-family: var(--f-mono); font-size:.66rem; letter-spacing:.06em; text-transform:uppercase;
  color: var(--gold-bright); margin-bottom:.6em; display:block;
}

/* ---------- FAQ accordion ---------- */
.faq-item{ border-bottom: 1px solid var(--line); }
.faq-q{
  width:100%; text-align:left; background:none; border:none; cursor:pointer;
  padding: 1.7em 0; display:flex; justify-content:space-between; align-items:center; gap: 2em;
}
.faq-q h3{ margin:0; font-size: 1.1rem; }
.faq-q .plus{
  width: 30px; height:30px; border-radius:50%; border:1px solid var(--gold-pale); flex:none;
  position:relative;
}
.faq-q .plus::before, .faq-q .plus::after{
  content:""; position:absolute; background: var(--gold-deep); top:50%; left:50%;
  transform: translate(-50%,-50%);
}
.faq-q .plus::before{ width:11px; height:1px; }
.faq-q .plus::after{ width:1px; height:11px; transition: transform .35s var(--ease); }
.faq-item.open .plus::after{ transform: translate(-50%,-50%) rotate(90deg) scale(0); }
.faq-a{ max-height:0; overflow:hidden; transition: max-height .5s var(--ease); }
.faq-a p{ padding-bottom: 1.8em; margin:0; max-width: 720px; }
.faq-item.open .faq-a{ max-height: 400px; }

/* ---------- form ---------- */
.form-shell{
  background: var(--glass);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-l);
  padding: 3em;
}
.field{ margin-bottom: 1.6em; }
.field label{
  display:block; font-family: var(--f-mono); font-size:.68rem; letter-spacing:.06em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom:.7em;
}
.field input, .field textarea{
  width:100%; background: rgba(255,255,255,.7); border:1px solid var(--line);
  border-radius: var(--radius-m); padding: .95em 1.1em;
  font-family: var(--f-body); font-size: 1rem; color: var(--ink);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.field input:focus, .field textarea:focus{
  outline:none; border-color: var(--gold); box-shadow: 0 0 0 4px rgba(141,163,239,.16);
}
.field textarea{ min-height: 130px; resize: vertical; }
.form-note{ font-size:.85rem; color: var(--ink-faint); margin-top: 1.2em; }
.form-success{
  display:none; text-align:center; padding: 2.4em 1em;
}
.form-success.show{ display:block; }
.form-success .spark-big{
  width:14px; height:14px; border-radius:50%; margin: 0 auto 1.2em;
  background: var(--gold-bright); box-shadow: 0 0 24px 6px rgba(171,185,248,.8);
}

/* ---------- misc ---------- */
.two-col{ display:grid; grid-template-columns: 1fr 1fr; gap: 4em; align-items:start; }
@media (max-width: 860px){ .two-col{ grid-template-columns: 1fr; gap: 2.4em; } }
.divider{ height:1px; background: var(--line); }
.tag-pill{
  font-family: var(--f-mono); font-size:.66rem; letter-spacing:.05em; text-transform:uppercase;
  border:1px solid var(--gold-pale); color: var(--gold-deep); padding: .5em 1em; border-radius:999px;
  background: rgba(255,255,255,.5);
}

/* ---------- footer social links ---------- */
.footer-social{ display:flex; gap:1em; margin-top:1.6em; flex-wrap:wrap; }
.footer-social a{
  font-family: var(--f-mono); font-size:.68rem; letter-spacing:.04em; text-transform:uppercase;
  color: rgba(242,243,248,.75);
  border: 1px solid var(--line-on-dark);
  padding: .65em 1.2em;
  border-radius: 999px;
  transition: all .35s var(--ease);
}
.footer-social a:hover{ color: var(--gold-bright); border-color: var(--gold-bright); }

/* ---------- inline telegram cta (contact page) ---------- */
.telegram-cta{
  display:flex; align-items:center; gap:1em; flex-wrap:wrap;
  background: var(--glass); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius-m);
  padding: 1.3em 1.6em;
  margin-top: 1.6em;
}
.telegram-cta p{ margin:0; font-size:.92rem; flex:1; min-width:180px; }