/* ============================================================
   РЕЖИМ ПРОТОТИПА · один сайт, по которому можно ходить
   ============================================================ */

.proto {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: #14161A;
  font-family: var(--font-ui);
  overflow-x: hidden;
}

.proto__stage {
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

/* --- мобильный: устройство по центру --- */

.proto[data-mode='mobile'] .proto__stage {
  align-items: center;
  padding: 28px max(12px, env(safe-area-inset-right)) calc(96px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
}

.proto[data-mode='mobile'] .proto__device {
  width: min(390px, calc(100vw - 24px));
  height: min(844px, calc(100dvh - 124px));
  min-height: 540px;
  background: #fff;
  border-radius: 30px;
  overflow: hidden;
  position: relative;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, .12),
    0 30px 70px -20px rgba(0, 0, 0, .7);
}

.proto[data-mode='mobile'] .proto__screen {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.proto[data-mode='mobile'] .proto__screen::-webkit-scrollbar { display: none; }

/* --- десктоп: сайт во всю ширину окна --- */

.proto[data-mode='desktop'] .proto__stage { padding: 0 0 76px; }
.proto[data-mode='desktop'] .proto__device { width: 100%; background: #fff; }
.proto[data-mode='desktop'] .proto__screen { min-height: 100vh; }

/* веб-вёрстка занимает ширину окна; ритм держат внутренние отступы секций */
.proto[data-mode='desktop'] .ed--d,
.proto[data-mode='desktop'] .mag--d,
.proto[data-mode='desktop'] .slide--d,
.proto[data-mode='desktop'] .chat--d {
  width: 100%;
  max-width: none;
  margin: 0;
}

/* в прототипе аннотационные пины не нужны */
.proto .pin { display: none; }

/* --- панель управления --- */

.proto__bar {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: rgba(20, 22, 26, .86);
  backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 100px;
  box-shadow: 0 18px 44px -14px rgba(0, 0, 0, .6);
}

.proto__btn {
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  border-radius: 100px;
  color: #E9ECEC;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 0;
  cursor: pointer;
  transition: background .16s ease;
  text-decoration: none;
}
.proto__btn:hover { background: rgba(255, 255, 255, .1); }
.proto__btn:active { background: rgba(255, 255, 255, .16); }
.proto__btn:focus-visible,
.proto__seg button:focus-visible,
.proto__link:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}
.proto__btn--wide { font-size: 12.5px; letter-spacing: .02em; }

.proto__seg {
  display: flex;
  background: rgba(255, 255, 255, .07);
  border-radius: 100px;
  padding: 3px;
}
.proto__seg button {
  min-width: 56px;
  height: 34px;
  border-radius: 100px;
  border: 0;
  background: none;
  color: #A7B0B4;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  cursor: pointer;
}
.proto__seg button[aria-pressed='true'] { background: #fff; color: #14161A; }
.proto__seg button:active { transform: scale(.97); }

/* --- список экранов --- */

.proto__menu[hidden] { display: none; }

.proto__menu {
  position: fixed;
  right: 20px;
  bottom: 76px;
  z-index: 200;
  width: 320px;
  max-height: 70vh;
  background: rgba(20, 22, 26, .96);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 60px -18px rgba(0, 0, 0, .7);
}

.proto__menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 10px 12px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  color: #E9ECEC;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.proto__menu-body { overflow-y: auto; padding: 8px 0 12px; }

.proto__group {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #6E7A80;
  padding: 14px 18px 6px;
}

.proto__link {
  display: block;
  width: 100%;
  text-align: left;
  padding: 9px 18px;
  background: none;
  border: 0;
  color: #A7B0B4;
  font-size: 13.5px;
  cursor: pointer;
}
.proto__link:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.proto__link[aria-current='true'] { color: #fff; box-shadow: inset 2px 0 0 #fff; }

@media (max-width: 900px) {
  .proto__menu { right: 12px; left: 12px; width: auto; }
}

@media (max-width: 520px) {
  .proto[data-mode='mobile'] .proto__stage {
    align-items: flex-start;
    padding: 0 0 calc(72px + env(safe-area-inset-bottom));
  }

  .proto[data-mode='mobile'] .proto__device {
    width: 100vw;
    height: calc(100dvh - 72px - env(safe-area-inset-bottom));
    min-height: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .proto__bar {
    bottom: max(8px, env(safe-area-inset-bottom));
    width: calc(100vw - 16px);
    justify-content: center;
    gap: 3px;
    padding: 6px;
  }

  .proto__btn { min-width: 38px; height: 38px; padding-inline: 10px; }
  .proto__btn--wide { padding-inline: 8px; }
  .proto__seg button { min-width: 48px; }
  .proto__menu { bottom: calc(66px + env(safe-area-inset-bottom)); max-height: calc(100dvh - 86px); }
}

@media (max-width: 370px) {
  .proto__btn--wide { font-size: 0; }
  .proto__btn--wide::first-letter { font-size: 14px; }
  #menuBtn::after { content: '☰'; font-size: 16px; }
  .proto__bar a.proto__btn--wide::after { content: '↗'; font-size: 15px; }
  .proto__seg button { min-width: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  .proto__btn,
  .proto__seg button { transition: none; }
}