:root {
  color-scheme: dark;
  --color-primary: hsl(0, 0%, 96%);
  --color-secondary: hsl(240, 15%, 4%);
  --color-surface: hsl(222, 47%, 9%);
  --color-muted: hsl(220, 12%, 70%);
  --color-tertiary: hsl(277, 92%, 65%);
  --color-accent: hsl(322, 90%, 64%);
  --gradient-brand: linear-gradient(135deg, var(--color-tertiary), var(--color-accent));
  --grad-main: var(--gradient-brand);
  --color-border-subtle: hsl(220, 15%, 30%);
  --color-border-strong: hsl(324, 95%, 72%);
  --transition-speed: 180ms;
}

.dark {
  --color-primary: hsl(0, 0%, 98%);
  --color-secondary: hsl(240, 20%, 2%);
  --color-surface: hsl(222, 47%, 7%);
  --color-muted: hsl(220, 10%, 68%);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Space Mono", monospace;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 20%, hsla(277, 92%, 35%, 0.45), transparent 55%),
    radial-gradient(circle at 90% 80%, hsla(322, 90%, 45%, 0.40), transparent 55%),
    var(--color-secondary);
  color: var(--color-primary);
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

@keyframes backgroundShift {
  0% { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

@keyframes twinkle {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, hsla(277, 92%, 30%, 0.28) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, hsla(322, 90%, 30%, 0.28) 0%, transparent 20%),
    radial-gradient(circle at 50% 50%, hsla(277, 92%, 22%, 0.18) 0%, transparent 30%);
  z-index: -1;
  animation: backgroundShift 20s ease-in-out infinite alternate;
  will-change: background-position;
  pointer-events: none;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: twinkle 5s infinite;
  pointer-events: none;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 20px;
  margin-top: 20px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1080px, 94%);
  margin-inline: auto;
  padding: 12px 28px;
  border-radius: 50px;
  background: hsla(240, 20%, 3%, 0.65);
  border: 1px solid transparent;
  background-image:
    linear-gradient(hsla(240, 20%, 3%, 0.65), hsla(240, 20%, 3%, 0.65)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.02));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.7);
  transition: transform var(--transition-speed);
}

.topbar:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.8);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.brand-logo {
  display: block;
  height: 32px;
  width: auto;
}

.brand-text { white-space: nowrap; }

.topnav {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}

.topnav a.toplink,
.topnav a.toplink:visited,
.topnav a.toplink:hover,
.topnav a.toplink:focus {
  text-decoration: none;
}

.main {
  flex: 1;
  padding: 32px 16px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1 {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.divider {
  width: 100%;
  height: 2px;
  margin: 14px 0 20px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  position: relative;
  overflow: hidden;
}

.divider--sm {
  width: min(420px, 72%);
  margin: 14px auto 18px;
}

.status-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.status {
  font-size: 14px;
  min-height: 1.3em;
  padding: 10px 12px;
  border-radius: 10px;
  background:
    radial-gradient(circle at top right, hsla(277, 92%, 30%, 0.15), transparent 60%),
    hsla(222, 47%, 5%, 0.9);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
}

.divider::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  animation: shimmer 2s infinite;
}

.toast {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 10px;
  background: hsla(222,47%,8%,0.85);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-primary);
  box-shadow:
    0 18px 45px rgba(0,0,0,0.6),
    0 0 22px hsla(277,92%,65%,0.15);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition:
    opacity var(--transition-speed),
    transform var(--transition-speed),
    border-color var(--transition-speed);

  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast[data-state="success"] { border-color: var(--color-border-strong); }
.toast[data-state="error"]   { border-color: hsl(8, 90%, 62%); }
.toast[data-state="info"]    { border-color: var(--color-border-subtle); }

.toast__icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  opacity: 0.95;
}

.toast__icon img {
  width: 18px;
  height: 18px;
  display: block;
  filter: invert(1) brightness(1.15);
}

.toast__msg {
  display: inline-block;
  line-height: 1.25;
}

.card {
  width: min(640px, 94vw);
  padding: 28px 24px 24px;
  border-radius: 18px;
  position: relative;
  background:
    radial-gradient(circle at top left, hsla(277, 92%, 30%, 0.25), transparent 55%),
    var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  box-shadow:
    0 18px 45px rgba(0, 0, 0, 0.9),
    0 0 32px hsla(277, 92%, 65%, 0.17);
  transition:
    transform var(--transition-speed) ease-out,
    box-shadow var(--transition-speed) ease-out,
    border-color var(--transition-speed) ease-out;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, hsla(277, 92%, 65%, 0.7), hsla(322, 90%, 64%, 0.7));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0.22;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.95),
    0 0 40px hsla(322, 90%, 64%, 0.33);
  border-color: var(--color-border-strong);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: 12px 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: none;
  transition:
    transform var(--transition-speed),
    filter var(--transition-speed),
    background var(--transition-speed),
    border-color var(--transition-speed),
    color var(--transition-speed),
    box-shadow var(--transition-speed);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.btn:hover { transform: translateY(-1px); }

a.btn:link,
a.btn:visited { color: inherit; }

.btn::before { content: none !important; }

.btn:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px hsla(277,92%,65%,0.35);
}

.btn--pill { border-radius: 999px; }
.btn__inner { display: inline-flex; align-items: center; gap: .5rem; }

.btn--primary,
.btn--ghost,
.btn-ghost {
  background: hsla(222, 47%, 8%, 0.6);
  color: var(--color-primary);
  border: 1px solid var(--color-border-subtle);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02);
  backdrop-filter: blur(6px);
}

.btn--primary:hover,
.btn--primary:focus-visible,
.btn--ghost:hover:not(:disabled),
.btn-ghost:hover:not(:disabled),
.btn--ghost:focus-visible,
.btn-ghost:focus-visible {
  background: var(--grad-main);
  border-color: transparent;
  color: #fff;
  box-shadow:
    0 0 0 3px hsla(277,92%,65%,0.15),
    0 12px 28px rgba(0,0,0,0.35);
}

a.btn.btn--primary:link,
a.btn.btn--primary:visited,
a.btn.btn--ghost:link,
a.btn.btn--ghost:visited,
a.btn.btn-ghost:link,
a.btn.btn-ghost:visited { color: var(--color-primary); }

.btn--always-primary {
  background: var(--grad-main);
  color: #fff;
  border-color: transparent;
}

.btn--always-primary:hover,
.btn--always-primary:focus-visible {
  background: var(--grad-main);
  color: #fff;
  border-color: transparent;
}

a.btn.btn--always-primary:link,
a.btn.btn--always-primary:visited { color: #fff; }

.btn--sm {
  padding: 8px 14px;
  font-size: 12px;
  border-radius: 8px;
  letter-spacing: 0.14em;
}

.toplink {
  background: none;
  border: none;
  color: var(--color-primary);
  font: inherit;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding: 5px 0;
  cursor: pointer;
  position: relative;
  display: inline-block;
  line-height: 1;
  transition: color var(--transition-speed), transform var(--transition-speed);
}

.toplink::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-tertiary);
  transition: width var(--transition-speed);
}

.toplink:hover {
  color: var(--color-tertiary);
  transform: scale(1.05);
}

.toplink:hover::after { width: 100%; }

.toplink:focus-visible {
  outline: 2px dashed var(--color-tertiary);
  outline-offset: 4px;
}

.site-footer {
  position: relative;
  margin-top: 24px;
  border-top: 0;
  background:
    radial-gradient(220px 140px at 10% -10%, hsla(277,92%,30%,0.08), transparent 60%),
    radial-gradient(260px 160px at 110% 10%, hsla(322,90%,35%,0.06), transparent 62%),
    transparent;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-tertiary) 15%, var(--color-accent) 85%, transparent);
  opacity: .75;
  -webkit-mask: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
  mask: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
  filter: drop-shadow(0 0 10px hsla(277,92%,65%,.25));
}

.site-footer__inner {
  width: min(1200px, 100% - 2rem);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 16px 0 18px;
}

.site-footer__brand {
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--color-primary);
  opacity: .92;
}

.site-footer__contacts {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem 1.1rem;
  list-style: none;
  padding: 0;
  margin: .45rem 0 0;
}

.site-footer__contacts li {
  display: flex;
  align-items: center;
  gap: .45rem;
}

.icon-telegram {
  width: 20px;
  height: 20px;
  display: inline-block;
  vertical-align: -2px;
  filter: invert(1) brightness(1.25);
  opacity: .92;
  transition: filter var(--transition-speed), opacity var(--transition-speed), transform var(--transition-speed);
}

.site-footer__contacts li:hover .icon-telegram {
  filter: invert(1) brightness(1.5);
  opacity: 1;
  transform: translateY(-1px);
}

.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
  opacity: .92;
  transition: color var(--transition-speed), opacity var(--transition-speed);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-tertiary);
  text-decoration: underline;
  opacity: 1;
  outline: 0;
}

.site-footer__right {
  display: flex;
  gap: 10px;
  align-items: center;
}

.site-footer__right .btn { text-decoration: none; }

.site-footer .btn::before,
.site-footer .btn:hover::before { content: none !important; }

.site-footer__right .btn:hover,
.site-footer__right .btn:focus-visible,
.site-footer__right .btn:active { text-decoration: none !important; }

@media (max-width: 640px) {
  .topbar { padding-inline: 20px; }
  .brand-text { max-width: 180px; overflow: hidden; text-overflow: ellipsis; }
  .card { padding-inline: 18px; }

  .site-footer__inner { flex-direction: column; align-items: flex-start; }
  .site-footer__right { width: 100%; justify-content: flex-end; margin-top: 8px; }
}