/* ==========================================================================
   STATE WARS — screens.css
   Screen switching, briefing panels, and the settings controls.
   ========================================================================== */

/* ---------- 1. Screen switching ----------------------------------------
   Every screen is stacked in the same box. Only `.is-active` is visible and
   focusable; `visibility: hidden` also removes hidden buttons from tab order.
   ------------------------------------------------------------------------ */

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-inline: var(--gutter);
  overflow-y: auto;
  overscroll-behavior: contain;

  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) scale(.985);
  transition:
    opacity    var(--t-mid) var(--ease-soft),
    transform  var(--t-slow) var(--ease-out),
    visibility 0s linear var(--t-mid);
}

.screen.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  transition:
    opacity   var(--t-slow) var(--ease-soft),
    transform var(--t-slow) var(--ease-out),
    visibility 0s;
}

/* The screen being replaced drops back instead of forward */
.screen.is-leaving {
  transform: translateY(-12px) scale(.99);
}

.reduce-motion .screen { transition-duration: 160ms, 160ms, 0s; }


/* ---------- 2. Briefing panel ------------------------------------------- */

.panel {
  position: relative;
  width: min(46rem, 100%);
  margin-block: clamp(3.5rem, 10vh, 6rem);
  padding: clamp(1.6rem, 4.5vw, 3rem);

  border: 1px solid rgba(127,216,255,.2);
  border-radius: 4px;
  background:
    linear-gradient(160deg, rgba(15,30,53,.9) 0%, rgba(7,13,26,.94) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.05),
    0 40px 90px -50px rgba(0,0,0,1),
    0 0 calc(70px * var(--fx)) -30px rgba(127,216,255,.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);

  transform: translate3d(calc(var(--px) * 5px), calc(var(--py) * 4px), 0);
  transition: transform 700ms var(--ease-soft);
}

.reduce-motion .panel { transform: none; transition: none; }

.panel--center { text-align: center; }

/* 2a. Corner brackets */
.panel__corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--c-gold);
  opacity: .8;
}
.panel__corner.tl { top: -1px; left: -1px;  border-right: 0; border-bottom: 0; }
.panel__corner.tr { top: -1px; right: -1px; border-left: 0;  border-bottom: 0; }
.panel__corner.bl { bottom: -1px; left: -1px;  border-right: 0; border-top: 0; }
.panel__corner.br { bottom: -1px; right: -1px; border-left: 0;  border-top: 0; }

/* 2b. Panel typography */
.panel__kicker {
  font-family: var(--font-mono);
  font-size: clamp(.58rem, 1.3vw, .7rem);
  letter-spacing: .46em;
  text-indent: .46em;
  text-transform: uppercase;
  color: var(--c-ice);
  opacity: .8;
  margin-bottom: .55rem;
}

.panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(1.9rem, 6vw, 3.1rem);
  line-height: 1;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: clamp(1.2rem, 3vh, 2rem);
  text-shadow: 0 0 calc(30px * var(--fx)) rgba(127,216,255,.35);
}

.panel__lead {
  max-width: 34rem;
  margin-inline: auto;
  font-size: clamp(.9rem, 2vw, 1.02rem);
  line-height: 1.65;
  color: var(--c-dim);
}

.panel__note {
  margin-top: clamp(1.2rem, 3vh, 1.8rem);
  padding-top: 1rem;
  border-top: 1px solid rgba(127,216,255,.12);
  font-family: var(--font-mono);
  font-size: clamp(.6rem, 1.3vw, .7rem);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-muted);
}


/* ---------- 3. COMING SOON ---------------------------------------------- */

.soon {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(2.4rem, 9vw, 5rem);
  line-height: 1;
  letter-spacing: .1em;
  text-transform: uppercase;

  background-image: linear-gradient(174deg,
    #fff3d6 0%, #ffd27a 26%, #d98d17 48%, #fff6e0 56%, #e8a52c 100%);
  background-size: 220% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 calc(34px * var(--fx)) rgba(255,160,40,.4));
  animation: sheen-slide 7s ease-in-out infinite;
}

.reduce-motion .soon { animation: none; }

.soon__bar {
  position: relative;
  width: min(20rem, 70%);
  height: 2px;
  margin: clamp(1.1rem, 3vh, 1.7rem) auto clamp(1.3rem, 3vh, 1.9rem);
  overflow: hidden;
  background: rgba(127,216,255,.14);
}

.soon__bar i {
  position: absolute;
  inset-block: 0;
  width: 34%;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  animation: sweep-bar 2.6s var(--ease-soft) infinite;
}

@keyframes sweep-bar {
  0%   { transform: translateX(-110%); }
  100% { transform: translateX(400%); }
}

.reduce-motion .soon__bar i { animation: none; transform: translateX(100%); }


/* ---------- 4. How-to steps --------------------------------------------- */

.steps {
  display: grid;
  gap: clamp(.85rem, 2.2vh, 1.25rem);
}

.step {
  display: flex;
  align-items: flex-start;
  gap: clamp(.9rem, 2.5vw, 1.35rem);
  padding: clamp(.85rem, 2.2vw, 1.15rem);
  border: 1px solid rgba(127,216,255,.12);
  border-left: 2px solid rgba(127,216,255,.42);
  border-radius: 3px;
  background: rgba(127,216,255,.035);
  transition: background var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              transform var(--t-mid) var(--ease-out);
}

@media (hover: hover) {
  .step:hover {
    background: rgba(127,216,255,.075);
    border-left-color: var(--c-gold);
    transform: translateX(4px);
  }
}

.step__num {
  flex: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--c-gold);
  opacity: .65;
}

.step__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1rem, 2.5vw, 1.18rem);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-text);
  margin-bottom: .3rem;
}

.step__body {
  font-size: clamp(.84rem, 1.9vw, .94rem);
  line-height: 1.6;
  color: var(--c-dim);
}


/* ---------- 5. Settings controls ---------------------------------------- */

.settings { display: grid; gap: clamp(.5rem, 1.6vh, .9rem); }

.setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(1rem, 3vw, 2rem);
  flex-wrap: wrap;
  padding: clamp(.85rem, 2.2vw, 1.15rem);
  border: 1px solid rgba(127,216,255,.12);
  border-radius: 3px;
  background: rgba(127,216,255,.035);
}

.setting__info { display: grid; gap: .22rem; min-width: 9rem; }

.setting__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(.95rem, 2.3vw, 1.08rem);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-text);
}

.setting__hint {
  font-family: var(--font-mono);
  font-size: clamp(.58rem, 1.3vw, .68rem);
  letter-spacing: .1em;
  color: var(--c-muted);
}

.setting__control {
  display: flex;
  align-items: center;
  gap: .85rem;
  flex: none;
}

/* 5a. Range slider */
.range {
  -webkit-appearance: none;
  appearance: none;
  width: clamp(7rem, 22vw, 11rem);
  height: 22px;
  background: transparent;
  cursor: pointer;
}

.range::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-gold) 0 var(--fill, 60%),
                                     rgba(127,216,255,.18) var(--fill, 60%) 100%);
}
.range::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-gold) 0 var(--fill, 60%),
                                     rgba(127,216,255,.18) var(--fill, 60%) 100%);
}

.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 15px;
  height: 15px;
  margin-top: -5.5px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 calc(12px * var(--fx)) rgba(255,194,92,.9);
  transition: transform var(--t-fast) var(--ease-out);
}
.range::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 calc(12px * var(--fx)) rgba(255,194,92,.9);
}

.range:hover::-webkit-slider-thumb  { transform: scale(1.2); }
.range:active::-webkit-slider-thumb { transform: scale(1.32); }

.range__out {
  width: 2.4em;
  font-family: var(--font-mono);
  font-size: .78rem;
  text-align: right;
  color: var(--c-dim);
}

/* 5b. Toggle switch */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
}

.toggle__track {
  position: relative;
  width: 48px;
  height: 24px;
  flex: none;
  border: 1px solid rgba(127,216,255,.28);
  border-radius: 999px;
  background: rgba(4,7,14,.7);
  transition: background var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out);
}

.toggle__knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-muted);
  transition: transform var(--t-mid) var(--ease-out),
              background var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out);
}

.toggle[aria-checked="true"] .toggle__track {
  background: rgba(255,194,92,.16);
  border-color: rgba(255,194,92,.6);
  box-shadow: 0 0 calc(16px * var(--fx)) -2px rgba(255,194,92,.55);
}
.toggle[aria-checked="true"] .toggle__knob {
  transform: translateX(24px);
  background: var(--c-gold);
  box-shadow: 0 0 calc(12px * var(--fx)) rgba(255,194,92,.9);
}

.toggle__word {
  width: 2.4em;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--c-dim);
}

/* 5c. Segmented control */
.segmented {
  position: relative;
  display: flex;
  padding: 3px;
  border: 1px solid rgba(127,216,255,.22);
  border-radius: 3px;
  background: rgba(4,7,14,.6);
}

.segmented__opt {
  position: relative;
  z-index: 1;
  padding: .42rem .82rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--c-muted);
  transition: color var(--t-mid) var(--ease-out);
}

.segmented__opt[aria-checked="true"] { color: #1a1204; }

.segmented__pill {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: 0;
  border-radius: 2px;
  background: var(--c-gold);
  box-shadow: 0 0 calc(16px * var(--fx)) -3px rgba(255,194,92,.9);
  transition: transform var(--t-mid) var(--ease-out),
              width var(--t-mid) var(--ease-out);
}


/* ---------- 6. Back button ---------------------------------------------- */

.btn--back {
  width: auto;
  min-height: 3.1rem;
  min-width: 11rem;
  margin-top: clamp(1.4rem, 3.5vh, 2.2rem);
  padding-inline: 1.6rem 1.6rem;
  justify-content: center;
  clip-path: polygon(14px 0, 100% 0, 100% 100%, 0 100%, 0 14px);
}

.panel--center .btn--back { margin-inline: auto; }

.btn--back .btn__text { flex: none; }

.btn--back .btn__label {
  font-size: clamp(.95rem, 2.4vw, 1.1rem);
  letter-spacing: .22em;
}

.btn--back .btn__edge { left: auto; right: 0; }


/* ---------- 7. Small screens -------------------------------------------- */

@media (max-width: 560px) {
  .setting { flex-direction: column; align-items: flex-start; }
  .setting__control { width: 100%; justify-content: space-between; }
  .range { flex: 1; width: auto; }
  .btn--back { width: 100%; }
}