/* Раздел 2: Design. Private / Warm / Intelligent / International / Understated. */
:root{
  --forest:#17231F;
  --ivory:#F3F0E8;
  --charcoal:#202321;
  --stone:#D9D4C8;
  --sage:#7C887C;
  --white:#FFFFFF;

  --serif: Georgia, 'Iowan Old Style', 'Times New Roman', Times, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --measure: 34rem;
  --gutter: clamp(1.5rem, 5vw, 4rem);
  --section: clamp(4.5rem, 11vw, 9rem);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ivory);
  color:var(--charcoal);
  font-family:var(--serif);
  font-size:18px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}

.wrap{max-width:64rem;margin:0 auto;padding:0 var(--gutter);}
.narrow{max-width:var(--measure);}

/* --- wordmark ---------------------------------------------------------- */
.wordmark{font-family:var(--sans);font-weight:600;letter-spacing:.3em;font-size:1.25rem;}
.descriptor{
  font-family:var(--sans);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--sage);margin-top:.5rem;
}

/* --- site chrome -------------------------------------------------------- */
.site-header{padding:2.2rem 0;}
.site-header .wrap{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;}
.site-header .descriptor{margin-top:0;}

.site-footer{
  border-top:1px solid var(--stone);margin-top:var(--section);
  padding:2.5rem 0 3.5rem;font-family:var(--sans);font-size:.8rem;color:var(--sage);
}
.site-footer a{text-decoration:none;}
.site-footer a:hover{text-decoration:underline;}
.footer-row{display:flex;flex-wrap:wrap;gap:1.5rem;justify-content:space-between;}

/* --- type --------------------------------------------------------------- */
h1,h2,h3{font-weight:400;line-height:1.15;margin:0 0 1.2rem;}
h1{font-size:clamp(2.4rem,6.5vw,4.2rem);letter-spacing:-.015em;}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem);}
h3{font-size:1.15rem;}
p{margin:0 0 1.25rem;}
.lead{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--charcoal);}
.eyebrow{
  font-family:var(--sans);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--sage);margin-bottom:1.6rem;
}
.muted{color:var(--sage);}
.rule{height:1px;background:var(--stone);border:0;margin:0;}

/* --- sections ----------------------------------------------------------- */
section{padding:var(--section) 0;}
.hero{padding:clamp(3rem,9vw,6rem) 0 var(--section);}
.hero h1{max-width:14ch;}
.dark{background:var(--forest);color:var(--ivory);}
.dark .muted,.dark .eyebrow{color:var(--stone);}
.dark .rule{background:rgba(217,212,200,.25);}

/* --- buttons ------------------------------------------------------------ */
.btn{
  display:inline-block;font-family:var(--sans);font-size:.78rem;letter-spacing:.16em;
  text-transform:uppercase;text-decoration:none;padding:1.05rem 2.1rem;border:0;
  background:var(--forest);color:var(--ivory);cursor:pointer;transition:opacity .18s ease;
}
.btn:hover{opacity:.85;}
.btn-light{background:var(--ivory);color:var(--forest);}
.btn-ghost{background:transparent;color:var(--forest);border:1px solid var(--forest);}
.btn-quiet{background:transparent;color:var(--sage);border:1px solid var(--stone);}
.btn[disabled]{opacity:.4;cursor:not-allowed;}

/* --- lists -------------------------------------------------------------- */
.cols{display:grid;gap:2.5rem 3rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));}
.plain{list-style:none;margin:0;padding:0;}
.plain li{padding:.9rem 0;border-bottom:1px solid var(--stone);}
.dark .plain li{border-color:rgba(217,212,200,.22);}
.not-list li::before{content:"—  ";color:var(--sage);}

/* --- forms -------------------------------------------------------------- */
.form{max-width:38rem;}
.step-head{font-family:var(--sans);font-size:.68rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--sage);margin:0 0 .5rem;}
.field{margin:0 0 2.2rem;}
.field > label,.field .q{display:block;font-size:1.05rem;margin-bottom:.55rem;}
.hint{font-family:var(--sans);font-size:.82rem;color:var(--sage);margin:-.2rem 0 .6rem;}
input[type=text],input[type=email],input[type=url],input[type=tel],
input[type=number],input[type=datetime-local],select,textarea{
  width:100%;font-family:var(--serif);font-size:1rem;color:var(--charcoal);
  background:var(--white);border:1px solid var(--stone);border-radius:0;
  padding:.85rem .95rem;
}
textarea{min-height:7rem;resize:vertical;line-height:1.6;}
input:focus,select:focus,textarea:focus{outline:2px solid var(--sage);outline-offset:-2px;}
.choices{display:flex;flex-wrap:wrap;gap:.55rem;}
.choice{position:relative;}
.choice input{position:absolute;opacity:0;width:0;height:0;}
.choice span{
  display:inline-block;font-family:var(--sans);font-size:.85rem;padding:.6rem 1rem;
  border:1px solid var(--stone);background:var(--white);cursor:pointer;
}
.choice input:checked + span{background:var(--forest);color:var(--ivory);border-color:var(--forest);}
.choice input:focus-visible + span{outline:2px solid var(--sage);outline-offset:2px;}
.error{font-family:var(--sans);font-size:.82rem;color:#8C3A2B;margin-top:.45rem;}
.consent{display:flex;gap:.7rem;align-items:flex-start;font-family:var(--sans);font-size:.85rem;}
.consent input{margin-top:.25rem;}
.form-nav{display:flex;gap:1rem;align-items:center;margin-top:2rem;}
.progress{font-family:var(--sans);font-size:.72rem;letter-spacing:.18em;color:var(--sage);
  text-transform:uppercase;margin-bottom:2.5rem;}

/* ==========================================================================
   Движение. Раздел 2: understated — приглушённо, ничего не прыгает.
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  html{scroll-behavior:smooth;}

  .reveal{
    opacity:0;
    transform:translateY(16px);
    transition:opacity .8s cubic-bezier(.22,.68,.24,1),
               transform .8s cubic-bezier(.22,.68,.24,1);
    transition-delay:var(--d, 0ms);
  }
  .reveal.in{opacity:1;transform:none;}

  /* шторка, уводящая взгляд по строке — только для крупных заголовков */
  .veil{position:relative;overflow:hidden;}
  .veil::after{
    content:"";position:absolute;inset:0;background:var(--ivory);
    transform-origin:right;transition:transform 1s cubic-bezier(.76,0,.24,1);
    transition-delay:var(--d, 0ms);
  }
  .dark .veil::after{background:var(--forest);}
  .veil.in::after{transform:scaleX(0);}

  .hero h1,.hero .lead,.hero .eyebrow,.hero p{animation:rise .9s cubic-bezier(.22,.68,.24,1) both;}
  .hero .eyebrow{animation-delay:.05s;}
  .hero h1{animation-delay:.15s;}
  .hero .lead{animation-delay:.3s;}
  .hero p:last-child{animation-delay:.45s;}

  @keyframes rise{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:none;}}

  .step{animation:stepIn .5s cubic-bezier(.22,.68,.24,1) both;}
  @keyframes stepIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}

  .btn{transition:background-color .25s ease,color .25s ease,
                  transform .25s cubic-bezier(.22,.68,.24,1),opacity .2s ease;}
  .btn:hover{transform:translateY(-2px);}
  .btn:active{transform:translateY(0);}
  .choice span{transition:background-color .2s ease,color .2s ease,border-color .2s ease;}
  input,select,textarea{transition:border-color .2s ease,background-color .2s ease;}
  .site-header{transition:border-color .4s ease,background-color .4s ease;}
}

/* --- шапка: линия проявляется при прокрутке ---------------------------- */
.site-header{position:sticky;top:0;z-index:20;background:var(--ivory);
  border-bottom:1px solid transparent;}
.site-header.scrolled{border-bottom-color:var(--stone);}

/* --- подчёркивание ссылок в тексте ------------------------------------- */
.prose a,.site-footer a{
  text-decoration:none;background-image:linear-gradient(currentColor,currentColor);
  background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .35s cubic-bezier(.22,.68,.24,1);
}
.prose a:hover,.site-footer a:hover{background-size:100% 1px;text-decoration:none;}

/* --- кнопка: заливка выезжает снизу ------------------------------------ */
.btn{position:relative;overflow:hidden;isolation:isolate;}
.btn::before{
  content:"";position:absolute;inset:0;z-index:-1;background:var(--sage);
  transform:translateY(101%);transition:transform .4s cubic-bezier(.22,.68,.24,1);
}
.btn:hover::before{transform:translateY(0);}
.btn-light::before{background:var(--stone);}
.btn-ghost::before,.btn-quiet::before{background:var(--forest);}
.btn-ghost:hover,.btn-quiet:hover{color:var(--ivory);border-color:var(--forest);}

/* --- цифры разделов на лендинге ---------------------------------------- */
.eyebrow{display:flex;align-items:center;gap:.9rem;}
.eyebrow::after{content:"";flex:1;max-width:4rem;height:1px;background:currentColor;opacity:.4;}

/* ==========================================================================
   Формы: видимые ошибки
   ========================================================================== */
.form-summary{
  border-left:2px solid #8C3A2B;background:#FBF3F0;padding:1rem 1.2rem;
  margin:0 0 2rem;font-family:var(--sans);font-size:.88rem;
}
.form-summary strong{display:block;margin-bottom:.4rem;}
.form-summary ul{margin:0;padding-left:1.1rem;}
.form-summary li{margin:.2rem 0;}
.form-summary a{color:#8C3A2B;}
.field.invalid input:not([type=checkbox]),
.field.invalid select,
.field.invalid textarea{border-color:#8C3A2B;background:#FDFAF9;}
.field.invalid .choices .choice span{border-color:#C7A99B;}
@media (prefers-reduced-motion: no-preference){
  .field.invalid{animation:nudge .35s ease;}
  @keyframes nudge{0%,100%{transform:translateX(0);}25%{transform:translateX(-4px);}
    75%{transform:translateX(4px);}}
}

/* --- индикатор шагов ---------------------------------------------------- */
.stepper{display:flex;align-items:center;gap:.7rem;margin-bottom:2.5rem;}
.stepper .dot{width:2.2rem;height:2px;background:var(--stone);transition:background-color .4s ease;}
.stepper .dot.done{background:var(--sage);}
.stepper .dot.now{background:var(--forest);}
.stepper .label{font-family:var(--sans);font-size:.7rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--sage);margin-left:.4rem;}