/* =====================================================================
   ТЕЗАУРУС · главная страница (вход)
   ===================================================================== */

#screen-landing{
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.landing-inner{
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px;
  animation: riseIn .5s ease both;
}

.landing-mark{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  font-size: 10px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--muted);
}
.landing-mark .dot{
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: breathe 2.4s ease-in-out infinite;
}

.landing-title{
  margin: 0;
  font-size: clamp(52px, 12vw, 168px);
  line-height: .95;
  font-weight: 700;
  letter-spacing: .16em;
  text-indent: .16em;
  background: var(--grad-3);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 18px 50px rgba(123,92,255,.28));
  animation: titleGlow 6s ease-in-out infinite;
  user-select: none;
}
@keyframes titleGlow{
  0%,100%{ filter: drop-shadow(0 18px 50px rgba(123,92,255,.22)); }
  50%    { filter: drop-shadow(0 22px 62px rgba(0,194,255,.38)); }
}

.landing-halo{
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(78vw, 780px);
  height: min(78vw, 780px);
  transform: translate(-50%, -60%);
  border-radius: 50%;
  border: 1px solid rgba(123,92,255,.18);
  box-shadow: inset 0 0 120px rgba(0,194,255,.10);
  pointer-events: none;
  z-index: -1;
  animation: haloSpin 40s linear infinite;
}
.landing-halo::before,
.landing-halo::after{
  content:'';
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  border: 1px dashed rgba(255,47,208,.16);
}
.landing-halo::after{ inset: 18%; border-style: solid; border-color: rgba(0,194,255,.14); }
@keyframes haloSpin{ to{ transform: translate(-50%,-60%) rotate(360deg); } }

.landing-sub{
  margin: 22px 0 0;
  font-size: clamp(11px, 1.4vw, 14px);
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding-left: .42em;
}
.landing-sub b{ color: var(--violet); font-weight: 700; }

.landing-text{
  margin: 20px 0 0;
  max-width: 620px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--muted);
}
.landing-text b{ color: var(--ink-2); }

.landing-actions{
  margin-top: 42px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.start-btn{
  position: relative;
  padding: 22px 56px;
  border: none;
  border-radius: 18px;
  background: var(--grad);
  color: #fff;
  font-size: clamp(13px, 1.6vw, 17px);
  font-weight: 700;
  letter-spacing: .22em;
  text-indent: .22em;
  text-transform: uppercase;
  box-shadow: 0 14px 40px rgba(0,140,255,.42), 0 0 0 1px rgba(255,255,255,.18) inset;
  transition: transform .2s cubic-bezier(.2,.9,.3,1.2), box-shadow .25s;
  animation: startPulse 3.4s ease-in-out infinite;
}
.start-btn:hover{
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 22px 54px rgba(0,140,255,.55), 0 0 0 1px rgba(255,255,255,.25) inset;
}
.start-btn:active{ transform: translateY(-1px) scale(.99); }
@keyframes startPulse{
  0%,100%{ box-shadow: 0 14px 40px rgba(0,140,255,.38), 0 0 0 0 rgba(123,92,255,.35); }
  50%    { box-shadow: 0 18px 48px rgba(0,140,255,.5), 0 0 0 16px rgba(123,92,255,0); }
}

.landing-note{
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--muted);
}
.landing-note b{ color: var(--ink-2); }

.landing-foot{
  position: absolute;
  left: 0; right: 0; bottom: 18px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 26px;
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--muted);
}
.landing-foot a{ color: var(--muted); text-decoration: none; border-bottom: 1px dotted rgba(13,20,36,.25); }
.landing-foot a:hover{ color: var(--violet); border-color: var(--violet); }

.landing-error{
  margin-top: 22px;
  max-width: 560px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,59,92,.08);
  border: 1px solid rgba(255,59,92,.28);
  color: var(--red-ink);
  font-size: 11.5px;
  line-height: 1.7;
  text-align: left;
}

@media (max-width: 760px){
  .landing-title{ letter-spacing: .1em; text-indent: .1em; }
  .start-btn{ padding: 18px 32px; letter-spacing: .12em; }
  .landing-foot{ flex-direction: column; gap: 6px; }
}