:root {
  --bg: #0A0D14;
  --surface: #111624;
  --surface-2: #161D2E;
  --border: #222B3E;
  --text: #D7DDE8;
  --muted: #828FA6;
  --dev: #3BE081;
  --design: #FF6FB3;
  --amber: #E7A94B;
  --red: #FF6B4A;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

.screen { min-height: 100vh; }
[hidden] { display: none !important; }

/* ===== Кнопки ===== */
.btn {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
}
.btn:hover { border-color: var(--dev); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible {
  outline: 2px solid var(--dev);
  outline-offset: 2px;
}
.btn-primary {
  background: rgba(59, 224, 129, .12);
  border-color: var(--dev);
  color: var(--dev);
}
.btn-primary:hover { background: rgba(59, 224, 129, .2); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 7px 12px; font-size: 12px; }
.btn-xs { padding: 4px 9px; font-size: 11px; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-console {
  width: 100%;
  text-align: left;
  background: var(--surface);
}
.btn-console:hover { border-color: var(--amber); }

/* ===== Поля ===== */
.field { display: flex; flex-direction: column; gap: 5px; }
.field-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
input[type=text], input[type=password] {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  width: 100%;
}
input:focus {
  outline: none;
  border-color: var(--dev);
  box-shadow: 0 0 0 2px rgba(59, 224, 129, .18);
}
input::placeholder { color: #4a5468; }

.error-box {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--red);
  border: 1px solid rgba(255, 107, 74, .4);
  background: rgba(255, 107, 74, .08);
  padding: 10px 12px;
  border-radius: 8px;
}

/* ===== Экран входа ===== */
#screen-auth { display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}
.logo-mark {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--muted);
}
.logo-mark .accent { color: var(--dev); }
.auth-title {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .06em;
  margin: 6px 0 2px;
}
.auth-sub { color: var(--muted); margin: 0 0 22px; font-size: 13px; }
.auth-block { margin-bottom: 8px; }
.block-h {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin: 0 0 10px;
}
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-divider {
  text-align: center;
  margin: 20px 0;
  position: relative;
  color: var(--muted);
  font-size: 12px;
}
.auth-divider::before {
  content: "";
  position: absolute;
  top: 50%; left: 0; right: 0;
  height: 1px;
  background: var(--border);
}
.auth-divider span {
  position: relative;
  background: var(--surface);
  padding: 0 12px;
}

/* ===== Выбор трека ===== */
.track-wrap { max-width: 900px; margin: 0 auto; padding: 60px 24px; }
.section-title {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 4px;
}
.section-sub { color: var(--muted); margin: 0 0 28px; }
.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.track-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  cursor: pointer;
  color: var(--text);
  transition: border-color .15s, transform .1s;
}
.track-card:hover { transform: translateY(-3px); }
.track-card:focus-visible { outline: 2px solid var(--dev); outline-offset: 3px; }
.track-dev:hover { border-color: var(--dev); }
.track-design:hover { border-color: var(--design); }
.track-emoji { font-size: 30px; }
.track-name { font-family: var(--mono); font-size: 17px; font-weight: 600; }
.track-dev .track-name { color: var(--dev); }
.track-design .track-name { color: var(--design); }
.track-desc { color: var(--muted); font-size: 13px; }

/* ===== Topbar ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
  gap: 10px;
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
.brand {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--dev);
}
.user-badge {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
}
.topbar-right { display: flex; gap: 8px; }

.core-banner {
  margin: 16px 22px 0;
  padding: 14px 18px;
  border-radius: 12px;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: .08em;
  text-align: center;
  color: var(--dev);
  border: 1px solid var(--dev);
  background: rgba(59, 224, 129, .1);
  box-shadow: 0 0 24px rgba(59, 224, 129, .18);
}

/* ===== Байт-панель ===== */
.byte-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 18px 22px;
}
.byte-block {
  flex: 1;
  min-width: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}
.byte-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.byte-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}
.byte-readout {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--dev);
}
.ext-status { color: var(--amber); }
.byte-lamps { display: flex; gap: 10px; }
.lamp {
  flex: 1;
  height: 38px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: #0c1018;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  color: #394253;
  transition: all .25s;
}
.lamp.on {
  background: rgba(59, 224, 129, .16);
  border-color: var(--dev);
  color: var(--dev);
  box-shadow: 0 0 14px rgba(59, 224, 129, .5), inset 0 0 8px rgba(59, 224, 129, .25);
}
.lamp.flash { animation: lampflash .6s ease; }
@keyframes lampflash {
  0% { transform: scale(1); }
  40% { transform: scale(1.15); box-shadow: 0 0 24px rgba(59,224,129,.8); }
  100% { transform: scale(1); }
}
.byte-meta { margin-top: 12px; display: flex; gap: 10px; }
.meta-pill {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
}

/* ===== Layout ===== */
.layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
  padding: 4px 22px 40px;
}
.col { display: flex; flex-direction: column; gap: 18px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}
.card-h {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .06em;
  margin: 0 0 14px;
}

/* ===== Список битов ===== */
.bits-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.bit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.bit-item.locked { opacity: .55; cursor: not-allowed; }
.bit-item.available:hover { border-color: var(--dev); }
.bit-item.active { border-color: var(--amber); }
.bit-item:focus-visible { outline: 2px solid var(--dev); outline-offset: 2px; }
.bit-status { font-size: 16px; width: 22px; text-align: center; }
.bit-solved .bit-status { color: var(--dev); }
.bit-main { flex: 1; min-width: 0; }
.bit-code {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .05em;
}
.bit-title { font-size: 14px; font-weight: 500; }
.bit-tier {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.bit-tier.extended { color: var(--amber); border-color: rgba(231,169,75,.5); }

/* ===== Панель задания ===== */
.task-panel { border-color: var(--amber); }
.task-head { margin-bottom: 10px; }
.task-code { font-family: var(--mono); font-size: 11px; color: var(--amber); letter-spacing: .08em; }
.task-title { font-family: var(--mono); font-size: 18px; margin: 4px 0 0; }
.task-prompt { color: var(--text); white-space: pre-wrap; }
.task-widget { margin: 12px 0; }
.task-answer { display: flex; gap: 10px; align-items: flex-end; margin-top: 14px; }
.task-answer .field { flex: 1; }
.hints-row { display: flex; gap: 8px; margin-top: 12px; }
.hint-out, .submit-out {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  white-space: pre-wrap;
}
.hint-out { color: var(--amber); border-color: rgba(231,169,75,.35); }
.submit-out.ok { color: var(--dev); border-color: var(--dev); background: rgba(59,224,129,.08); }
.submit-out.err { color: var(--red); border-color: rgba(255,107,74,.4); background: rgba(255,107,74,.08); }

/* ===== Виджеты заданий ===== */
.w-note { color: var(--muted); font-size: 12px; margin: 8px 0 0; font-style: italic; }
.w-options { display: flex; flex-direction: column; gap: 8px; }
.w-option {
  font-family: var(--mono);
  font-size: 13px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--text);
  text-align: left;
  display: flex;
  gap: 10px;
}
.w-option:hover { border-color: var(--dev); }
.w-option.sel { border-color: var(--dev); background: rgba(59,224,129,.1); }
.w-option-label { color: var(--dev); font-weight: 600; }
.w-lines { list-style: none; margin: 0; padding: 0; font-family: var(--mono); }
.w-lines li {
  padding: 6px 10px;
  border-left: 2px solid var(--border);
  background: var(--bg);
  margin-bottom: 4px;
}
.w-lines li .acro { color: var(--dev); font-weight: 700; }
.w-colors { display: flex; flex-wrap: wrap; gap: 10px; }
.w-swatch {
  width: 92px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 11px;
}
.w-swatch-fill { height: 52px; }
.w-swatch-label { padding: 5px 7px; background: var(--surface-2); text-align: center; }
.w-fragments { display: flex; flex-direction: column; gap: 6px; font-family: var(--mono); font-size: 13px; }
.w-fragment {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ===== Консоль ===== */
.console-card { position: sticky; top: 74px; }
.console-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.console-tab {
  font-family: var(--mono);
  font-size: 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
}
.console-tab.active { color: var(--dev); border-color: var(--dev); background: rgba(59,224,129,.1); }
.console-tab:focus-visible { outline: 2px solid var(--dev); outline-offset: 2px; }
.console-group { display: flex; flex-direction: column; gap: 10px; }
.console-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.console-param { display: flex; gap: 8px; }
.console-param input { flex: 1; }
.console-param .btn-console { width: auto; white-space: nowrap; }
.console-note { color: var(--muted); font-size: 12px; margin: 0; }
.console-activate {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.activate-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

/* ===== Маяк ===== */
.beacon-widget {
  border: 1px solid rgba(231,169,75,.4);
  border-radius: 12px;
  padding: 14px;
  background: rgba(231,169,75,.05);
}
.beacon-head { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--amber); margin-bottom: 10px; }
.beacon-body { text-align: center; margin-bottom: 12px; }
.beacon-code {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .1em;
}
.beacon-timer { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 4px; }
.beacon-ctrl { display: flex; gap: 8px; }
.beacon-ctrl .btn { flex: 1; }

/* ===== Вывод консоли ===== */
.console-out-wrap { margin-top: 16px; }
.console-out-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: 6px;
}
.console-out {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  max-height: 340px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  margin: 0;
}
.console-out .log-meta { color: var(--muted); }
.console-out .log-ok { color: var(--dev); }
.console-out .log-err { color: var(--red); }

/* ===== Адаптив ===== */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .console-card { position: static; }
}
@media (max-width: 520px) {
  .console-btns, .activate-grid { grid-template-columns: 1fr; }
  .byte-lamps { gap: 6px; }
  .lamp { height: 30px; font-size: 9px; }
}

/* строка API-ключа в консоли */
.key-row{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  margin-bottom:14px; font-size:13px;
}
.key-label{ color:var(--muted); font-family:var(--sans); }
.my-key{
  font-family:var(--mono); color:var(--dev);
  background:var(--bg); border:1px solid var(--border);
  padding:4px 8px; border-radius:6px; word-break:break-all; user-select:all;
}

/* виджеты «Контраст» и «Лишний цвет» */
.w-pairs{ display:grid; grid-template-columns:repeat(2,1fr); gap:10px; margin-top:10px; }
.w-pair{
  border:2px solid var(--border); border-radius:10px; cursor:pointer;
  min-height:64px; display:flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--sans); font-size:15px; padding:12px; transition:border-color .12s;
}
.w-pair:hover{ border-color:var(--muted); }
.w-pair.sel{ border-color:var(--dev); box-shadow:0 0 0 2px var(--dev) inset; }
.w-pair-label{ font-family:var(--mono); font-weight:700; opacity:.85; }
.w-pair-text{ font-weight:600; }