:root {
  --radius: 0.25rem;
  --background: oklch(7.5% 0.008 285);
  --foreground: oklch(91% 0.012 285);
  --card: oklch(12% 0.01 285);
  --card-foreground: oklch(91% 0.012 285);
  --popover: oklch(12% 0.01 285);
  --popover-foreground: oklch(91% 0.012 285);
  --primary: oklch(69% 0.25 350);
  --primary-foreground: oklch(98% 0.005 285);
  --secondary: oklch(20% 0.015 285);
  --secondary-foreground: oklch(91% 0.012 285);
  --muted: oklch(16% 0.01 285);
  --muted-foreground: oklch(62% 0.018 285);
  --accent: oklch(69% 0.25 350);
  --accent-foreground: oklch(98% 0.005 285);
  --destructive: oklch(57.7% 0.245 27.325);
  --destructive-foreground: oklch(98.4% 0.003 247.858);
  --border: oklch(38% 0.018 285 / 0.45);
  --input: oklch(24% 0.014 285);
  --ring: oklch(69% 0.25 350);

  --font-display: "Sora", sans-serif;
  --font-sans: "Space Mono", monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  overflow: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Keyframes */
@keyframes pulse-signal {
  0%, 100% {
    opacity: 0.45;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.18);
  }
}

@keyframes blink {
  0%, 60%, 100% {
    opacity: 0.2;
  }
  30% {
    opacity: 1;
  }
}

@keyframes message-appear {
  from {
    opacity: 0;
    transform: translate3d(0, 6px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

/* Main 3D Shell */
.dimension-shell {
  --pointer-x: 50vw;
  --pointer-y: 50vh;
  --turn-x: 0deg;
  --turn-y: 0deg;
  isolation: isolate;
  background: var(--background);
  perspective: 1100px;
  min-height: 100vh;
  min-height: 100dvh;
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  position: relative;
  overflow: hidden;
  contain: strict;
}

/* Background Visual Layers - GPU Accelerated */
.dimension-image {
  z-index: -5;
  object-fit: cover;
  opacity: 0.58;
  filter: contrast(1.16) saturate(0.75);
  width: 106%;
  height: 106%;
  transform: translate3d(0, 0, 0) rotateX(var(--turn-x)) rotateY(var(--turn-y)) scale(1.025);
  transition: transform 0.15s cubic-bezier(0.2, 0, 0, 1), opacity 0.25s ease;
  position: absolute;
  inset: -3%;
  pointer-events: none;
  user-select: none;
  will-change: transform;
  backface-visibility: hidden;
}

.relay-is-open .dimension-image {
  opacity: 0.28;
  transform: scale(1.05);
}

.dimension-vignette {
  z-index: -4;
  background: radial-gradient(circle at var(--pointer-x) var(--pointer-y), oklch(68% 0.22 350 / 0.08), transparent 25%),
              linear-gradient(90deg, oklch(5% 0.008 285 / 0.88), transparent 35%, transparent 65%, oklch(5% 0.008 285 / 0.88)),
              linear-gradient(0deg, oklch(4% 0.006 285 / 0.85), transparent 45%);
  position: absolute;
  inset: 0;
  pointer-events: none;
  contain: strict;
}

.dimension-grid {
  z-index: -3;
  opacity: 0.2;
  transform-origin: bottom;
  background-image: linear-gradient(oklch(90% 0.01 285 / 0.14) 1px, transparent 1px),
                    linear-gradient(90deg, oklch(90% 0.01 285 / 0.14) 1px, transparent 1px);
  background-size: 84px 84px;
  position: absolute;
  inset: 0;
  transform: translate3d(0, 0, 0) perspective(700px) rotateX(67deg) translateY(49%) scale(1.8);
  -webkit-mask-image: radial-gradient(#000, transparent 78%);
  mask-image: radial-gradient(#000, transparent 78%);
  pointer-events: none;
  will-change: transform;
  backface-visibility: hidden;
  contain: paint;
}

/* GPU-accelerated cursor spotlight */
.dimension-cursor {
  z-index: -2;
  left: 0;
  top: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
  position: absolute;
  box-shadow: 0 0 120px 42px oklch(69% 0.25 350 / 0.12);
  transform: translate3d(var(--pointer-x), var(--pointer-y), 0) translate(-50%, -50%);
  will-change: transform;
  contain: layout paint;
}

.scanline {
  z-index: 20;
  pointer-events: none;
  opacity: 0.16;
  background: repeating-linear-gradient(0deg, transparent 0 3px, oklch(3% 0 0 / 0.35) 4px);
  position: absolute;
  inset: 0;
  contain: strict;
}

/* Hero / Identity View */
.identity-view {
  place-items: center;
  transition: opacity 0.18s ease-out, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  display: grid;
  position: absolute;
  inset: 0;
  will-change: transform, opacity;
}

.relay-is-open .identity-view {
  opacity: 0;
  pointer-events: none;
  transform: translate3d(0, -10px, 0) scale(0.98);
}

.identity-axis {
  color: var(--muted-foreground);
  letter-spacing: 0.2em;
  inset-inline: clamp(1.25rem, 4vw, 4rem);
  justify-content: space-between;
  font-size: 0.54rem;
  display: flex;
  position: absolute;
  top: clamp(1.5rem, 5vh, 3.5rem);
  text-transform: uppercase;
}

.identity-core {
  text-align: center;
  width: min(90vw, 1140px);
  transform: translate3d(0, 0, 70px);
  will-change: transform;
}

.signal-label {
  justify-content: center;
  align-items: center;
  margin: 0 0 1.5rem;
  display: flex;
}

.signal-label span {
  background: var(--primary);
  width: 32px;
  height: 1px;
  box-shadow: 0 0 10px var(--primary);
  display: inline-block;
}

.identity-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  text-align: left;
  margin: 0 auto;
  width: fit-content;
  max-width: 100%;
}

.identity-col-primary h1 {
  color: var(--foreground);
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  text-shadow: 0 1px oklch(100% 0 0 / 0.65), 0 18px 35px oklch(0% 0 0 / 0.85), 0 0 50px oklch(68% 0.22 350 / 0.1);
  margin: 0;
  font-size: clamp(1.6rem, 2.8vw, 3rem);
  font-weight: 200;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.identity-col-secondary {
  border-left: 1px solid var(--border);
  padding-left: clamp(1rem, 2vw, 2.25rem);
  display: flex;
  align-items: center;
  align-self: stretch;
}

.identity-tagline {
  color: var(--muted-foreground);
  font-family: var(--font-sans);
  font-size: clamp(0.72rem, 1vw, 0.95rem);
  line-height: 1.5;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  margin: 0;
  white-space: nowrap;
}

.social-nav {
  justify-content: center;
  gap: clamp(1.25rem, 4vw, 3.5rem);
  margin-top: clamp(2rem, 5vh, 4rem);
  display: flex;
}

.social-nav a {
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.64rem;
  text-decoration: none;
  transition: color 0.2s ease;
  display: inline-flex;
}

.social-nav a:hover {
  color: var(--foreground);
}

.social-nav svg {
  width: 0.75rem;
  height: 0.75rem;
  color: var(--primary);
}

.relay-trigger {
  border: 1px solid var(--border);
  width: min(88vw, 180px);
  height: 48px;
  color: var(--foreground);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  letter-spacing: 0.18em;
  background: oklch(8% 0.008 285 / 0.72);
  border-radius: 0;
  grid-template-columns: 44px 1fr;
  padding: 0;
  font-size: 0.67rem;
  font-family: var(--font-sans);
  display: grid;
  align-items: center;
  position: absolute;
  bottom: clamp(4rem, 10vh, 7rem);
  box-shadow: 0 18px 50px oklch(0% 0 0 / 0.45), inset 0 1px oklch(100% 0 0 / 0.08);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.relay-trigger:hover {
  color: var(--foreground);
  border-color: var(--primary);
  background: oklch(16% 0.02 350 / 0.75);
}

.relay-trigger-icon {
  width: 46px;
  height: 48px;
  color: var(--primary);
  border-right: 1px solid var(--border);
  place-items: center;
  display: grid;
}

.relay-trigger-icon svg {
  width: 14px;
  height: 14px;
}

.relay-trigger-label {
  text-align: center;
  padding-right: 10px;
  font-weight: 500;
}

/* Relay View (Interactive Modal Console) */
.relay-view {
  border: 1px solid var(--border);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: oklch(7% 0.008 285 / 0.88);
  grid-template-rows: auto 1fr;
  transition: opacity 0.18s ease-out, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.22s;
  display: grid;
  position: absolute;
  inset: clamp(0.75rem, 2vw, 1.5rem);
  transform: translate3d(0, 10px, 0) scale(0.98);
  box-shadow: 0 30px 100px oklch(0% 0 0 / 0.7), inset 0 1px oklch(100% 0 0 / 0.06);
  z-index: 10;
  will-change: transform, opacity;
}

.relay-is-open .relay-view {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate3d(0, 0, 0) scale(1);
}

.relay-header {
  border-bottom: 1px solid var(--border);
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 68px;
  padding: 0.75rem clamp(0.75rem, 2vw, 1.5rem);
  display: grid;
}

.relay-back {
  color: var(--muted-foreground);
  border-radius: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, background 0.2s ease;
}

.relay-back:hover {
  color: var(--primary);
  background: var(--muted);
}

.relay-back svg {
  width: 18px;
  height: 18px;
}

.relay-title {
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  display: flex;
}

.relay-title p {
  letter-spacing: 0.14em;
  margin: 0;
  font-size: 0.68rem;
  font-weight: 700;
}

.relay-title span:not(.relay-status-dot) {
  color: var(--muted-foreground);
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
  font-size: 0.52rem;
  display: block;
}

.relay-status-dot {
  background: var(--primary);
  width: 6px;
  height: 6px;
  box-shadow: 0 0 14px var(--primary);
  border-radius: 50%;
  flex: none;
  animation: 2s ease-in-out infinite pulse-signal;
}

.relay-encryption {
  color: var(--muted-foreground);
  letter-spacing: 0.12em;
  font-size: 0.5rem;
}

.relay-console {
  grid-template-rows: minmax(0, 1fr) auto;
  width: min(100%, 880px);
  min-height: 0;
  margin-inline: auto;
  padding: clamp(1rem, 3vw, 2.5rem);
  display: grid;
  height: 100%;
}

.relay-conversation {
  min-height: 0;
  overflow-y: auto;
  position: relative;
  padding-right: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  -webkit-overflow-scrolling: touch;
}

.relay-messages {
  gap: 2rem;
  padding: 1rem 0 2rem;
  display: flex;
  flex-direction: column;
}

.relay-message {
  max-width: min(88%, 640px);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: message-appear 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

.relay-message.is-user {
  margin-left: auto;
  align-items: flex-end;
}

.relay-message.is-assistant {
  margin-right: auto;
  align-items: flex-start;
}

.message-origin {
  color: var(--primary);
  letter-spacing: 0.16em;
  font-size: 0.52rem;
  font-weight: 700;
}

.relay-message-content {
  border: 1px solid var(--border);
  background: var(--secondary);
  color: var(--secondary-foreground);
  border-radius: 0;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(0.92rem, 1.7vw, 1.08rem);
  font-weight: 300;
  line-height: 1.75;
  word-break: break-word;
}

.is-user .relay-message-content {
  background: oklch(24% 0.02 285 / 0.85);
  border-color: oklch(48% 0.03 285 / 0.6);
}

.relay-thinking {
  color: var(--muted-foreground);
  font-family: var(--font-sans);
  letter-spacing: 0.12em;
  flex-direction: row;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.55rem;
  display: flex;
  padding: 0.6rem 1rem;
}

.relay-thinking i {
  background: var(--primary);
  width: 3px;
  height: 3px;
  border-radius: 50%;
  animation: 1.2s infinite blink;
  display: inline-block;
}

.relay-thinking i:nth-child(2) {
  animation-delay: 0.2s;
}

.relay-thinking i:nth-child(3) {
  animation-delay: 0.4s;
}

.relay-composer-wrap {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.composer-index {
  color: var(--muted-foreground);
  letter-spacing: 0.14em;
  margin-bottom: 0.65rem;
  font-size: 0.5rem;
  display: block;
}

.relay-composer {
  border: 1px solid var(--border);
  background: oklch(10% 0.01 285 / 0.88);
  border-radius: 0;
  box-shadow: 0 16px 50px oklch(0% 0 0 / 0.4);
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.relay-composer:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px oklch(69% 0.25 350 / 0.24), 0 16px 50px oklch(0% 0 0 / 0.4);
}

.relay-textarea {
  min-height: 82px;
  max-height: 200px;
  color: var(--foreground);
  font-family: var(--font-display);
  padding: 1rem;
  font-size: 0.9rem;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  width: 100%;
  line-height: 1.5;
}

.relay-textarea::placeholder {
  color: var(--muted-foreground);
}

.relay-footer {
  color: var(--muted-foreground);
  letter-spacing: 0.12em;
  padding: 0.4rem 0.5rem 0.5rem 0.85rem;
  font-size: 0.48rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  border-top: 1px solid oklch(24% 0.014 285 / 0.3);
}

.relay-footer-submit-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.relay-submit {
  background: var(--primary);
  color: var(--primary-foreground);
  border-radius: 0;
  border: none;
  flex: none;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

.relay-submit svg {
  width: 14px;
  height: 14px;
}

.relay-submit:hover:not(:disabled) {
  background: var(--foreground);
  color: var(--background);
}

.relay-submit:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* System Footer */
.system-footer {
  color: var(--muted-foreground);
  letter-spacing: 0.16em;
  inset-inline: clamp(1.25rem, 4vw, 4rem);
  align-items: center;
  gap: 0.8rem;
  font-size: 0.5rem;
  transition: opacity 0.2s ease;
  display: flex;
  position: absolute;
  bottom: 1.5rem;
}

.relay-is-open .system-footer {
  opacity: 0;
  pointer-events: none;
}

.system-line {
  background: var(--border);
  flex: 1;
  height: 1px;
}

/* Touch & Mobile Optimization (Preserves battery and CPU) */
@media (hover: none) and (pointer: coarse) {
  .dimension-image {
    transform: none !important;
    transition: none !important;
  }
  .dimension-cursor {
    display: none !important;
  }
  .dimension-vignette {
    background: linear-gradient(90deg, oklch(5% 0.008 285 / 0.88), transparent 35%, transparent 65%, oklch(5% 0.008 285 / 0.88)),
                linear-gradient(0deg, oklch(4% 0.006 285 / 0.85), transparent 45%) !important;
  }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .dimension-image {
    transform: none !important;
  }
}

/* Responsive Layout (Two Rows on Narrow Screens) */
@media (max-width: 820px) {
  .identity-grid {
    display: grid;
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.25rem;
    width: 100%;
  }

  .identity-col-primary h1 {
    font-size: clamp(2rem, 7vw, 3.2rem);
    white-space: normal;
    text-align: center;
    line-height: 1.05;
  }

  .identity-col-secondary {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 1.15rem;
    align-items: center;
    justify-content: center;
    text-align: center;
    align-self: auto;
  }

  .identity-tagline {
    max-width: 100%;
    text-align: center;
    white-space: normal;
  }
}

/* Mobile Screen Layout */
@media (max-width: 640px) {
  .dimension-image {
    object-position: center;
    width: 116%;
    height: 116%;
    inset: -8%;
    transform: none;
  }

  .dimension-grid {
    background-size: 44px 44px;
  }

  .identity-core {
    width: 92vw;
    transform: translate3d(0, 0, 40px);
  }

  .identity-col-primary h1 {
    font-size: clamp(1.5rem, 7.2vw, 2.4rem);
  }

  .social-nav {
    gap: 0.9rem;
  }

  .social-nav a {
    letter-spacing: 0.1em;
    font-size: 0.52rem;
  }

  .relay-view {
    inset: 0.5rem;
  }

  .relay-header {
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 62px;
  }

  .relay-encryption {
    display: none;
  }

  .relay-console {
    padding: 0.8rem;
  }

  .relay-messages {
    gap: 1.4rem;
    padding-top: 0.7rem;
  }

  .relay-message {
    max-width: 94%;
  }

  .relay-textarea {
    min-height: 72px;
  }

  .relay-footer-submit-group > span {
    font-size: 0.42rem;
  }
}