/* Login Concept V2 — Private Aperture
   Full-bleed threshold chamber. Fixture lab only. Locked dark arrival language. */

:root {
  color-scheme: dark;
  --lcv2-void: #04070d;
  --lcv2-blade: #070b12;
  --lcv2-blade-edge: rgba(186, 214, 236, 0.55);
  --lcv2-seam: rgba(214, 234, 248, 0.92);
  --lcv2-seam-soft: rgba(140, 190, 220, 0.35);
  --lcv2-ink: #eef3f8;
  --lcv2-muted: rgba(214, 226, 238, 0.62);
  --lcv2-faint: rgba(186, 202, 218, 0.48);
  --lcv2-field-line: rgba(186, 214, 236, 0.38);
  --lcv2-field-fill: rgba(8, 14, 22, 0.55);
  --lcv2-focus: #9fd0ea;
  --lcv2-error: #e8a090;
  --lcv2-ack: rgba(186, 214, 236, 0.85);
  --lcv2-open-ms: 720ms;
  --lcv2-ease: cubic-bezier(0.2, 0.85, 0.2, 1);
  --lcv2-font: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --lcv2-safe-top: max(1.25rem, env(safe-area-inset-top));
  --lcv2-safe-bottom: max(1rem, env(safe-area-inset-bottom));
  --lcv2-safe-x: max(1.25rem, env(safe-area-inset-left), env(safe-area-inset-right));
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
  background: var(--lcv2-void);
}

body.lcv2 {
  margin: 0;
  min-height: 100dvh;
  min-height: 100svh;
  font-family: var(--lcv2-font);
  font-size: 15px;
  line-height: 1.4;
  color: var(--lcv2-ink);
  background: var(--lcv2-void);
  overflow: hidden;
}

.lcv2-atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 90% 42% at 50% 48%, rgba(56, 96, 128, 0.28), transparent 62%),
    radial-gradient(ellipse 70% 36% at 50% 100%, rgba(28, 56, 78, 0.22), transparent 58%),
    linear-gradient(180deg, #04070d 0%, #060a12 48%, #04070d 100%);
}

.lcv2-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    radial-gradient(1px 1px at 18% 22%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1px 1px at 72% 30%, rgba(255, 255, 255, 0.22), transparent),
    radial-gradient(1px 1px at 40% 68%, rgba(255, 255, 255, 0.18), transparent),
    radial-gradient(1px 1px at 84% 78%, rgba(255, 255, 255, 0.16), transparent);
}

body.lcv2--open .lcv2-atmosphere {
  background:
    radial-gradient(ellipse 80% 50% at 50% 42%, rgba(48, 88, 120, 0.2), transparent 64%),
    linear-gradient(180deg, #04070d 0%, #070c16 100%);
}

.lcv2-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 60;
  padding: 0.55rem 0.8rem;
  background: #0c1420;
  color: var(--lcv2-ink);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--lcv2-blade-edge);
}

.lcv2-skip:focus {
  left: var(--lcv2-safe-x);
  top: var(--lcv2-safe-top);
  outline: 2px solid var(--lcv2-focus);
  outline-offset: 2px;
}

/* Full-viewport blades = architectural threshold, not a mid-page card */
.lcv2-blade {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 20;
  background:
    linear-gradient(180deg, rgba(10, 16, 26, 0.98), rgba(7, 11, 18, 0.98));
  transition: transform var(--lcv2-open-ms) var(--lcv2-ease);
  will-change: transform;
}

.lcv2-blade--top {
  top: 0;
  height: calc(50% + 1px);
  border-bottom: 1px solid var(--lcv2-blade-edge);
  box-shadow:
    0 1px 0 rgba(186, 214, 236, 0.12),
    inset 0 -28px 48px rgba(70, 120, 160, 0.06);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 var(--lcv2-safe-x) clamp(2.5rem, 8vh, 4.5rem);
}

.lcv2-blade--bottom {
  bottom: 0;
  height: calc(50% + 1px);
  border-top: 1px solid var(--lcv2-blade-edge);
  box-shadow:
    0 -1px 0 rgba(186, 214, 236, 0.1),
    inset 0 28px 48px rgba(70, 120, 160, 0.05);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(2.25rem, 7vh, 4rem) var(--lcv2-safe-x) var(--lcv2-safe-bottom);
}

body.lcv2--open .lcv2-blade--top {
  transform: translateY(-102%);
}

body.lcv2--open .lcv2-blade--bottom {
  transform: translateY(102%);
}

.lcv2-persistent-mark {
  position: fixed;
  top: var(--lcv2-safe-top);
  left: 50%;
  z-index: 25;
  transform: translateX(-50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 280ms ease 180ms;
}

body.lcv2--open .lcv2-persistent-mark {
  opacity: 0.9;
}

.lcv2-lockup--persistent {
  width: min(180px, 48vw);
  height: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.lcv2-mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  text-align: center;
}

.lcv2-lockup {
  display: block;
  width: min(240px, 70vw);
  height: auto;
  filter: brightness(0) invert(1);
  opacity: 0.96;
}

.lcv2-kicker {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--lcv2-muted);
}

.lcv2-blade-foot {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lcv2-faint);
}

.lcv2-seam {
  position: fixed;
  left: 0;
  right: 0;
  top: 50%;
  z-index: 30;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  pointer-events: none;
  transition: opacity 200ms ease, visibility 200ms ease;
}

.lcv2-seam__glow {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(92vw, 36rem);
  height: 4.5rem;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(140, 196, 230, 0.22), transparent 70%);
  pointer-events: none;
}

.lcv2-seam__line {
  display: block;
  width: min(78vw, 28rem);
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--lcv2-seam-soft) 18%,
    var(--lcv2-seam) 50%,
    var(--lcv2-seam-soft) 82%,
    transparent 100%
  );
  box-shadow: 0 0 18px rgba(160, 210, 240, 0.28);
}

.lcv2-continue {
  pointer-events: auto;
  position: relative;
  z-index: 1;
  min-height: 44px;
  padding: 0.55rem 1.4rem;
  border: 1px solid rgba(214, 234, 248, 0.42);
  border-radius: 0;
  background: rgba(6, 10, 16, 0.55);
  color: var(--lcv2-ink);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 160ms ease, background 160ms ease;
}

.lcv2-continue:hover {
  border-color: rgba(214, 234, 248, 0.78);
  background: rgba(10, 16, 24, 0.72);
}

.lcv2-continue:focus-visible {
  outline: 2px solid var(--lcv2-focus);
  outline-offset: 3px;
}

body.lcv2--open .lcv2-seam {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.lcv2-throat {
  position: relative;
  z-index: 10;
  min-height: 100dvh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    calc(var(--lcv2-safe-top) + 3.5rem)
    var(--lcv2-safe-x)
    calc(var(--lcv2-safe-bottom) + 1rem);
  opacity: 0;
  visibility: hidden;
  transition: opacity 280ms ease 120ms, visibility 280ms ease 120ms;
}

body.lcv2--open .lcv2-throat {
  opacity: 1;
  visibility: visible;
}

body.lcv2--open.lcv2-keyboard-open .lcv2-throat {
  align-items: flex-start;
  padding-top: calc(var(--lcv2-safe-top) + 0.5rem);
  overflow-y: auto;
}

.lcv2-form {
  width: min(100%, 22.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.lcv2-throat-kicker {
  margin: 0 0 0.25rem;
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--lcv2-muted);
}

.lcv2-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.lcv2-field label {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lcv2-faint);
}

.lcv2-field input {
  min-height: 46px;
  width: 100%;
  padding: 0.7rem 0.15rem;
  border: 0;
  border-bottom: 1px solid var(--lcv2-field-line);
  border-radius: 0;
  background: transparent;
  color: var(--lcv2-ink);
  font: inherit;
  font-size: 1.05rem;
  -webkit-appearance: none;
  appearance: none;
}

.lcv2-field input:focus,
.lcv2-field input:focus-visible {
  outline: none;
  border-bottom-color: var(--lcv2-focus);
  box-shadow: 0 1px 0 var(--lcv2-focus);
}

.lcv2-error,
.lcv2-ack {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.84rem;
}

.lcv2-error {
  color: var(--lcv2-error);
}

.lcv2-ack {
  color: var(--lcv2-ack);
}

.lcv2-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 0.35rem;
}

.lcv2-access {
  min-height: 44px;
  padding: 0.45rem 0.15rem 0.45rem 1rem;
  border: 0;
  border-bottom: 1px solid rgba(214, 234, 248, 0.55);
  border-radius: 0;
  background: transparent;
  color: var(--lcv2-ink);
  font: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  cursor: pointer;
}

.lcv2-access:hover {
  border-bottom-color: var(--lcv2-seam);
}

.lcv2-access:focus-visible {
  outline: 2px solid var(--lcv2-focus);
  outline-offset: 4px;
}

.lcv2-foot {
  margin: 1.25rem 0 0;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--lcv2-faint);
}

@media (min-width: 1024px) {
  .lcv2-form {
    width: min(100%, 26rem);
  }

  .lcv2-seam__line {
    width: min(56vw, 34rem);
  }

  .lcv2-throat-kicker {
    font-size: 0.72rem;
  }

  /* Desktop: corner ticks only — instrument frame, not a card panel */
  body.lcv2--open .lcv2-form {
    position: relative;
    z-index: 1;
    padding: 1.25rem 0.25rem;
  }

  body.lcv2--open .lcv2-form::before,
  body.lcv2--open .lcv2-form::after {
    content: "";
    position: absolute;
    width: 1.1rem;
    height: 1.1rem;
    border-color: rgba(186, 214, 236, 0.34);
    border-style: solid;
    pointer-events: none;
  }

  body.lcv2--open .lcv2-form::before {
    top: 0;
    left: 0;
    border-width: 1px 0 0 1px;
  }

  body.lcv2--open .lcv2-form::after {
    right: 0;
    bottom: 0;
    border-width: 0 1px 1px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --lcv2-open-ms: 0ms;
  }

  .lcv2-blade,
  .lcv2-seam,
  .lcv2-throat {
    transition: none;
  }
}