/* ─── tokens ──────────────────────────────────────────────────── */

:root {
  --bg:           #050505;
  --bg-elev:     #0e0e0e;
  --tile:        #131313;
  --tile-edge:   #1f1f1f;
  --amber:       #ffb01f;
  --amber-soft:  #c98410;
  --amber-dim:   #6a4408;
  --green:       #5ce06b;
  --red:         #ff4d4d;
  --muted:       #5a5a5a;

  --tile-w:   2.2ch;
  --tile-h:   3.2ch;
  --tile-gap: 0.15ch;

  --flap: 90ms cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

/* ─── base ────────────────────────────────────────────────────── */

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
body {
  background: var(--bg);
  color: var(--amber);
  font-family: "IBM Plex Mono", monospace;
  font-feature-settings: "tnum";
  letter-spacing: 0.02em;
  display: flex;
  flex-direction: column;
  cursor: default;
}

/* CRT-ish overlays */
#screen-frame {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  background:
    radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.55) 100%);
}
#scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.015) 0,
    rgba(255,255,255,0.015) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
  opacity: 0.6;
}

/* ─── top chrome ──────────────────────────────────────────────── */

#chrome-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 1.2rem 2rem;
  border-bottom: 1px solid #1c1c1c;
  background: linear-gradient(to bottom, #0a0a0a, #050505);
  z-index: 2;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.35em;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,176,31,0.35);
}
.brand-text { font-weight: 700; }

.dot-live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: breathe 2.1s ease-in-out infinite;
}
body[data-state="error"] .dot-live { background: var(--red); box-shadow: 0 0 10px var(--red); }
body[data-state="typing"] .dot-live { background: var(--amber); box-shadow: 0 0 10px var(--amber); animation-duration: 0.8s; }

@keyframes breathe {
  0%, 100% { opacity: 0.35; transform: scale(0.85); }
  50%      { opacity: 1;    transform: scale(1.1); }
}

.status {
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  color: var(--amber-soft);
  text-align: center;
  text-shadow: 0 0 8px rgba(201,132,16,0.3);
}

.clock {
  font-family: "VT323", monospace;
  font-size: 1.8rem;
  text-align: right;
  color: var(--amber);
  text-shadow: 0 0 12px rgba(255,176,31,0.45);
  letter-spacing: 0.1em;
}

/* ─── board ───────────────────────────────────────────────────── */

#board {
  flex: 1;
  min-height: 0;
  padding: 1.5rem 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow: hidden;
  z-index: 2;
}

.row {
  display: grid;
  grid-template-columns: 7ch 7ch 1fr 7ch;
  align-items: center;
  gap: 1.5rem;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px dashed #181818;
}

.row-header {
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--muted);
  border-bottom: 1px solid #1c1c1c;
  padding-bottom: 0.6rem;
}

.col-time, .col-from, .col-track {
  font-family: "VT323", monospace;
  font-size: 1.2rem;
  color: var(--amber-soft);
  letter-spacing: 0.05em;
}
.row-header .col-time,
.row-header .col-from,
.row-header .col-track,
.row-header .col-message { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; }

.col-track {
  text-align: right;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,176,31,0.3);
}

#history {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  mask-image: linear-gradient(to top, #000 70%, transparent 100%);
}

.history-row {
  opacity: 0.55;
  transition: opacity 800ms ease;
}
.history-row .col-message {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--amber-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-row.user-row .col-message {
  color: var(--muted);
  font-style: italic;
}
.history-row.user-row .col-from { color: var(--muted); }

/* ─── now (current scene) ────────────────────────────────────── */

#now {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid #1c1c1c;
}

.row-now {
  padding: 1rem 0.6rem;
  background: linear-gradient(to right, rgba(255,176,31,0.04), transparent);
}

.row-now .col-time,
.row-now .col-from,
.row-now .col-track {
  font-size: 1.6rem;
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255,176,31,0.4);
}

#flap-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--tile-gap);
  font-family: "IBM Plex Mono", monospace;
  font-weight: 700;
}

/* ─── tiles ──────────────────────────────────────────────────── */

.tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tile-w);
  height: var(--tile-h);
  background: var(--tile);
  color: var(--amber);
  border: 1px solid var(--tile-edge);
  border-radius: 2px;
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: 0;
  position: relative;
  box-shadow:
    inset 0 -1px 0 #000,
    inset 0 1px 0 #1a1a1a,
    0 0 0 1px #000;
  text-shadow: 0 0 6px rgba(255,176,31,0.45);
  overflow: hidden;
}

/* The horizontal hinge line that defines a Solari board. */
.tile::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: #000;
  pointer-events: none;
  z-index: 2;
}

.tile.tile-space {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}
.tile.tile-space::after { display: none; }

/* Flap animation: scale the tile content from 1 → 0 (collapse top half),
   then it snaps back. Combined with rapid textContent swaps in JS, this
   reads as mechanical flap rolls. */
.tile.flipping {
  animation: flap var(--flap) ease-in-out;
}
@keyframes flap {
  0%   { transform: rotateX(0deg); }
  49%  { transform: rotateX(-90deg); filter: brightness(0.6); }
  51%  { transform: rotateX(90deg);  filter: brightness(0.6); }
  100% { transform: rotateX(0deg); }
}

/* settled tile gets a subtle glow */
.tile.settled {
  animation: settle 700ms ease-out;
}
@keyframes settle {
  0%   { box-shadow: inset 0 -1px 0 #000, inset 0 1px 0 #1a1a1a, 0 0 18px rgba(255,176,31,0.7); }
  100% { box-shadow: inset 0 -1px 0 #000, inset 0 1px 0 #1a1a1a, 0 0 0 1px #000; }
}

/* ─── response ───────────────────────────────────────────────── */

#chrome-bottom {
  padding: 1rem 2rem 1.5rem;
  border-top: 1px solid #1c1c1c;
  background: linear-gradient(to top, #0a0a0a, #050505);
  z-index: 2;
}

#response {
  min-height: 4.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.track-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--amber-dim);
  background: transparent;
  color: var(--amber);
  cursor: pointer;
  border-radius: 2px;
  text-transform: uppercase;
  transition: background 150ms ease, color 150ms ease, border-color 150ms ease, transform 100ms ease;
}
.track-btn:hover {
  background: var(--amber);
  color: #000;
  border-color: var(--amber);
  text-shadow: none;
}
.track-btn:active { transform: translateY(1px); }

.track-btn .track-num {
  font-family: "VT323", monospace;
  font-size: 1.4rem;
  color: var(--amber);
  background: rgba(255,176,31,0.08);
  padding: 0 0.5rem;
  border-radius: 2px;
  border: 1px solid var(--amber-dim);
}
.track-btn:hover .track-num {
  color: #000;
  background: rgba(0,0,0,0.15);
  border-color: #000;
}

.input-shell {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  border: 1px solid var(--amber-dim);
  padding: 0.6rem 0.9rem;
  border-radius: 2px;
  background: rgba(255,176,31,0.03);
}
.input-shell::before {
  content: "DESTINATION ▸";
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--amber-soft);
}
.text-input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--amber);
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-shadow: 0 0 6px rgba(255,176,31,0.3);
  caret-color: var(--amber);
}
.text-input::placeholder { color: var(--muted); }
.input-shell .send-hint {
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.2em;
}

/* ─── legend ─────────────────────────────────────────────────── */

#legend {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--muted);
}
#legend a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-dim);
}
#legend a:hover { color: var(--amber); }
#legend code {
  font-family: "IBM Plex Mono", monospace;
  color: var(--amber-soft);
}

/* ─── boot ───────────────────────────────────────────────────── */

#boot {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  transition: opacity 600ms ease;
}
.boot-grid {
  display: grid;
  grid-template-columns: repeat(8, 1ch);
  gap: 4px;
}
.boot-grid span {
  width: 1ch;
  height: 2ch;
  background: var(--amber-dim);
  animation: blink 1.1s ease-in-out infinite;
}
.boot-grid span:nth-child(2) { animation-delay: 0.1s; }
.boot-grid span:nth-child(3) { animation-delay: 0.2s; }
.boot-grid span:nth-child(4) { animation-delay: 0.3s; }
.boot-grid span:nth-child(5) { animation-delay: 0.4s; }
.boot-grid span:nth-child(6) { animation-delay: 0.5s; }
.boot-grid span:nth-child(7) { animation-delay: 0.6s; }
.boot-grid span:nth-child(8) { animation-delay: 0.7s; }
@keyframes blink {
  0%, 100% { background: var(--amber-dim); }
  50%      { background: var(--amber); box-shadow: 0 0 12px var(--amber); }
}
.boot-text {
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--amber-soft);
}
body:not([data-state="loading"]) #boot {
  opacity: 0;
  pointer-events: none;
}

/* ─── typing state ───────────────────────────────────────────── */

body[data-state="typing"] .status::after {
  content: " · INCOMING";
  color: var(--amber);
  animation: blink-text 0.9s steps(2, end) infinite;
}
@keyframes blink-text {
  50% { opacity: 0.2; }
}

/* ─── error scene ────────────────────────────────────────────── */

body[data-state="error"] .status {
  color: var(--red);
  text-shadow: 0 0 8px rgba(255,77,77,0.4);
}
body[data-state="error"] #now-track,
body[data-state="error"] #now-time,
body[data-state="error"] #now-from { color: var(--red); text-shadow: none; }
body[data-state="error"] .tile { color: var(--red); text-shadow: 0 0 6px rgba(255,77,77,0.45); }

/* ─── small screens ──────────────────────────────────────────── */

@media (max-width: 720px) {
  :root { --tile-w: 1.7ch; --tile-h: 2.4ch; }
  #chrome-top { grid-template-columns: 1fr auto; padding: 0.8rem 1rem; }
  .status { display: none; }
  .clock { font-size: 1.3rem; }
  .row { grid-template-columns: 5ch 5ch 1fr 5ch; gap: 0.8rem; padding: 0.3rem; }
  .row-now .col-time, .row-now .col-from, .row-now .col-track { font-size: 1.1rem; }
  .tile { font-size: 1.1rem; }
  #board { padding: 1rem; }
  #chrome-bottom { padding: 0.8rem 1rem; }
}