:root {
  --lt-bg: #0e1116;
  --lt-panel: rgba(17, 20, 28, 0.86);
  --lt-panel-strong: rgba(10, 12, 18, 0.92);
  --lt-text: #ede7d9;
  --lt-muted: #9ca3af;
  --lt-gold: #d6a85a;
  --lt-danger: #b54747;
  --lt-blue: #7fb3d5;
  --lt-success: #6ea982;
  --lt-border: rgba(237, 231, 217, 0.16);
  --lt-shadow: rgba(0, 0, 0, 0.55);
  color-scheme: dark;
}

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

html, body {
  height: 100%; overflow: hidden;
  background: var(--lt-bg);
  color: var(--lt-text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
textarea { font: inherit; resize: none; }

#lt-root { height: 100%; }

.lt-shell {
  height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 50% 15%, rgba(214,168,90,.18), transparent 28%),
              linear-gradient(180deg, rgba(4,6,10,.50), rgba(4,6,10,.86));
  backdrop-filter: blur(2px);
}
@supports not (backdrop-filter: blur(1px)) {
  .lt-shell { background: linear-gradient(180deg, #080a10, #0e1116); }
}

.lt-phone {
  position: relative;
  width: min(100vw, 430px);
  height: min(100vh, 100dvh, 930px);
  max-height: 100vh;
  overflow: hidden;
  background: #0d1118;
  box-shadow: 0 22px 90px rgba(0,0,0,.65);
  border: 1px solid rgba(255,255,255,.08);
  display: flex; flex-direction: column;
}
@supports (height: 100dvh) { .lt-phone { max-height: 100dvh; } }
@media (min-width: 720px) { .lt-phone { border-radius: 28px; height: min(92vh, 900px); } }

/* ── Stage ── */
.lt-stage {
  position: absolute; inset: 0; overflow: hidden;
  background: linear-gradient(180deg, #151922, #0a0d12 72%);
  z-index: 0;
}
.lt-stage::before {
  content: ""; position: absolute; inset: -12% -20%;
  background:
    linear-gradient(90deg, transparent 0 16%, rgba(214,168,90,.08) 17% 18%, transparent 19% 35%, rgba(127,179,213,.07) 36% 38%, transparent 39% 100%),
    radial-gradient(circle at 18% 26%, rgba(214,168,90,.18), transparent 18%),
    radial-gradient(circle at 78% 12%, rgba(127,179,213,.12), transparent 24%);
  opacity: .86;
  animation: lt-train-sway 5.2s ease-in-out infinite;
}
.lt-stage::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.12), rgba(0,0,0,.32) 45%, rgba(0,0,0,.78));
}
@keyframes lt-train-sway { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(3px); } }

/* ── Top bar ── */
.lt-topbar {
  position: relative; z-index: 10;
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px 6px;
  font-size: 11px; line-height: 1.4;
  background: linear-gradient(180deg, rgba(10,12,18,.95) 60%, transparent);
  pointer-events: none;
}
.lt-topbar-left { flex: 1; color: var(--lt-gold); font-weight: 600; }
.lt-topbar-right { color: var(--lt-muted); white-space: nowrap; }

.lt-audio-mute {
  font-size: 14px; cursor: pointer;
  padding: 2px 7px; border-radius: 999px;
  border: 1px solid rgba(237,231,217,.12);
  color: var(--lt-text); background: rgba(237,231,217,.05);
  pointer-events: auto; line-height: 1;
  min-height: 28px; min-width: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: 4px;
}
.lt-audio-mute:hover, .lt-audio-mute:focus-visible { background: rgba(237,231,217,.14); }

/* ── Content: scene-driven ── */
.lt-content {
  position: relative; z-index: 5;
  flex: 1; overflow-y: auto; overflow-x: hidden;
  padding: 8px 14px 120px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.lt-scene-card {
  background: var(--lt-panel);
  border: 1px solid var(--lt-border);
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 10px;
  backdrop-filter: blur(8px);
}
.lt-location {
  font-size: 20px; font-weight: 700; color: var(--lt-gold);
  margin-bottom: 10px; letter-spacing: 1px;
}
.lt-scene-text {
  font-size: 15px; line-height: 1.8; color: var(--lt-text);
  margin-bottom: 12px;
}
.lt-current-goal {
  font-size: 12px; color: var(--lt-blue); margin-bottom: 10px;
  border-left: 2px solid var(--lt-blue); padding-left: 10px;
}
.lt-visible-npcs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }

/* ── NPC chips ── */
.lt-npc-chip {
  padding: 8px 16px; border-radius: 999px;
  background: rgba(214,168,90,.12); color: var(--lt-gold);
  font-size: 13px; font-weight: 600; border: 1px solid rgba(214,168,90,.3);
  transition: background .15s; min-height: 44px;
  display: inline-flex; align-items: center;
}
.lt-npc-chip:active { background: rgba(214,168,90,.3); }
.lt-hidden-npc-chip {
  background: rgba(180,130,210,.1); color: #c0a0d8;
  border: 1px solid rgba(180,130,210,.25);
  font-style: italic; min-height: 44px;
  display: inline-flex; align-items: center;
}
.lt-scene-chip {
  padding: 8px 16px; border-radius: 999px;
  background: rgba(127,179,213,.1); color: var(--lt-blue);
  font-size: 13px; border: 1px solid rgba(127,179,213,.3);
  transition: background .15s; min-height: 44px;
  display: inline-flex; align-items: center;
}

/* ── Latest message ── */
.lt-latest-msg {
  padding: 10px 14px; border-radius: 10px;
  font-size: 14px; line-height: 1.6;
  background: rgba(237,231,217,.04);
  border: 1px solid rgba(237,231,217,.06);
  min-height: 2em;
  display: none;
}
.lt-latest-msg.lt-show { display: block; }
.lt-latest-msg .lt-latest-npc { color: var(--lt-gold); font-weight: 600; margin-right: 6px; }
.lt-latest-msg .lt-latest-player { color: var(--lt-blue); font-weight: 600; margin-right: 6px; }
.lt-latest-msg .lt-latest-system { color: var(--lt-muted); }

/* ── Log drawer ── */
.lt-log-drawer {
  position: absolute; z-index: 20;
  inset: 0 0 0 0;
  background: var(--lt-panel-strong);
  backdrop-filter: blur(12px);
  flex-direction: column;
  display: none;
  transform: translateY(20px); opacity: 0;
  transition: transform .25s ease, opacity .25s ease;
}
.lt-log-drawer.lt-show {
  display: flex;
  transform: translateY(0); opacity: 1;
}
.lt-log-drawer-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--lt-border);
  font-size: 14px; font-weight: 600; color: var(--lt-gold);
}
.lt-log-close {
  font-size: 18px; color: var(--lt-muted); padding: 4px 8px;
}
.lt-log-drawer .lt-log {
  flex: 1; overflow-y: auto; padding: 10px 14px 20px;
  display: flex; flex-direction: column; gap: 8px;
}

/* ── Messages (shared) ── */
.lt-log { display: flex; flex-direction: column; gap: 8px; }
.lt-msg {
  padding: 8px 12px; border-radius: 10px;
  font-size: 13px; line-height: 1.6;
  animation: lt-msg-in .2s ease-out;
}
@keyframes lt-msg-in { from { opacity: 0; transform: translateY(4px); } }
.lt-msg-player {
  background: rgba(214,168,90,.1); color: var(--lt-gold);
  border: 1px solid rgba(214,168,90,.15);
  align-self: flex-end;
  margin-left: 20%;
}
.lt-msg-npc {
  background: rgba(127,179,213,.08); color: var(--lt-text);
  border: 1px solid rgba(127,179,213,.1);
  align-self: flex-start;
  margin-right: 20%;
}
.lt-msg-system {
  color: var(--lt-muted); font-size: 12px; text-align: center;
  padding: 4px; background: none; border: none;
  align-self: center;
}
.lt-msg-outcome {
  background: rgba(110,169,130,.1); color: var(--lt-text);
  border: 1px solid rgba(110,169,130,.15);
}
.lt-msg-title { font-size: 13px; font-weight: 700; color: var(--lt-gold); margin-bottom: 4px; }
.lt-subtitle { font-size: 11px; color: var(--lt-muted); margin: 6px 0 2px; }
.lt-msg ul, .lt-msg ol { margin: 2px 0; padding-left: 18px; font-size: 13px; }
.lt-msg li { margin-bottom: 2px; }
.lt-muted { color: var(--lt-muted); }

/* ── Portrait (dialogue-only floating, above dialogue panel) ── */
.lt-portrait-layer {
  position: absolute; z-index: 9;
  top: 52px; left: 50%; transform: translateX(-50%);
  width: 55%; max-width: 220px;
  display: none;
  pointer-events: none;
}
.lt-portrait {
  width: 100%; height: auto; display: block;
  opacity: 0; transition: opacity .4s ease;
}
.lt-portrait-layer.lt-show { display: block; }
.lt-portrait-layer.lt-show .lt-portrait { opacity: 1; }

/* ── Dialogue panel ── */
.lt-dialogue-panel {
  position: absolute; z-index: 8;
  inset: auto 0 88px 0;
  max-height: 35vh;
  background: linear-gradient(180deg, transparent, rgba(10,12,18,.94) 20%);
  display: none;
  flex-direction: column;
  padding: 8px 14px 0;
}
.lt-dialogue-panel.lt-show { display: flex; }
.lt-dialogue-header {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(214,168,90,.15);
}
.lt-dialogue-npc { font-size: 13px; color: var(--lt-gold); font-weight: 600; }
.lt-end-dialogue-btn {
  font-size: 11px; color: var(--lt-muted);
  padding: 3px 10px; border: 1px solid rgba(237,231,217,.1); border-radius: 999px;
}
.lt-dialogue-panel .lt-dialogue-log {
  flex: 1; overflow-y: auto; padding: 6px 0 0;
  display: flex; flex-direction: column; gap: 6px;
}

/* ── Bottom bar: 3-tab mode ── */
.lt-bottom {
  position: absolute; z-index: 12;
  inset: auto 0 0 0;
  background: linear-gradient(180deg, transparent, rgba(10,12,18,.95) 18%);
  padding: 8px 14px max(12px, env(safe-area-inset-bottom));
}

.lt-mode-tabs {
  display: flex; gap: 4px; margin-bottom: 8px;
}
.lt-mode-tab {
  flex: 1; padding: 8px 0; text-align: center;
  font-size: 13px; font-weight: 600;
  color: var(--lt-muted);
  border-radius: 10px;
  background: rgba(237,231,217,.04);
  transition: background .15s, color .15s;
}
.lt-mode-tab.lt-active {
  color: var(--lt-gold);
  background: rgba(214,168,90,.12);
  border: 1px solid rgba(214,168,90,.25);
}
.lt-mode-tab:active { background: rgba(214,168,90,.2); }

.lt-input-row {
  display: flex; gap: 8px; align-items: flex-end;
}
.lt-input {
  flex: 1; min-height: 38px; max-height: 80px;
  padding: 8px 12px;
  border-radius: 12px; border: 1px solid var(--lt-border);
  background: rgba(237,231,217,.06);
  color: var(--lt-text); font-size: 14px; line-height: 1.5;
  outline: none;
}
.lt-input:focus { border-color: rgba(214,168,90,.4); }
.lt-input::placeholder { color: var(--lt-muted); }

.lt-btn { font-weight: 600; border-radius: 12px; padding: 8px 16px; }
.lt-btn-send {
  background: rgba(214,168,90,.15); color: var(--lt-gold);
  border: 1px solid rgba(214,168,90,.3);
  font-size: 13px; min-height: 38px;
}
.lt-btn-send:active { background: rgba(214,168,90,.3); }

/* ── Intro overlay ── */
.lt-intro {
  position: absolute; z-index: 100; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.95), rgba(4,6,10,.98));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px; opacity: 0; pointer-events: none;
  transition: opacity .4s;
}
.lt-intro.lt-show { opacity: 1; pointer-events: auto; }
.lt-intro-card { max-width: 340px; text-align: center; }
.lt-intro-kicker {
  font-size: 11px; color: var(--lt-muted); letter-spacing: 2px;
  margin-bottom: 8px;
}
.lt-intro-title {
  font-size: 28px; font-weight: 800; color: var(--lt-gold);
  margin-bottom: 20px; letter-spacing: 4px;
}
.lt-intro-steps { text-align: left; margin-bottom: 16px; }
.lt-intro-steps div {
  font-size: 13px; line-height: 1.6; margin-bottom: 10px; color: var(--lt-text);
}
.lt-intro-steps strong { color: var(--lt-gold); margin-right: 6px; }
.lt-intro-memory {
  font-size: 12px; color: var(--lt-danger); font-style: italic;
  padding: 10px 0; border-top: 1px solid rgba(237,231,217,.08);
  border-bottom: 1px solid rgba(237,231,217,.08);
  margin-bottom: 20px;
}
.lt-intro-btn {
  padding: 12px 40px; border-radius: 999px;
  background: var(--lt-gold); color: #0d1118;
  font-size: 15px; font-weight: 700; letter-spacing: 1px;
}
.lt-intro-btn:active { opacity: .85; }
.lt-intro-skip {
  font-size: 11px; color: var(--lt-muted); margin-top: 16px;
}

/* ── Failure overlay (NG) ── */
.lt-ng {
  position: absolute; z-index: 50; inset: 0;
  display: none; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px;
}
.lt-ng.lt-show { display: flex; }
.lt-ng-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: brightness(.4) saturate(.6);
}
.lt-ng-card {
  position: relative; z-index: 2;
  background: var(--lt-panel-strong); border-radius: 16px;
  padding: 20px; max-width: 340px; width: 100%;
  font-size: 13px; line-height: 1.7;
  border: 1px solid var(--lt-border);
}
.lt-ng-title {
  font-size: 20px; font-weight: 800; color: var(--lt-danger);
  margin-bottom: 10px; text-align: center;
}
.lt-ng-card ul { margin: 6px 0; padding-left: 18px; }
.lt-ng-card li { margin-bottom: 3px; }
.lt-next {
  display: block; width: 100%; margin-top: 16px;
  padding: 10px 0; border-radius: 999px;
  background: rgba(214,168,90,.15); color: var(--lt-gold);
  border: 1px solid rgba(214,168,90,.3);
  font-size: 14px; font-weight: 700; text-align: center;
}
.lt-next:active { background: rgba(214,168,90,.3); }

/* ── Toast ── */
.lt-toast {
  position: absolute; z-index: 60; top: 60px; left: 50%; transform: translateX(-50%);
  padding: 8px 20px; border-radius: 999px;
  background: var(--lt-panel-strong); color: var(--lt-gold);
  font-size: 12px; font-weight: 600;
  border: 1px solid rgba(214,168,90,.3);
  animation: lt-toast-in .3s ease-out;
  pointer-events: none;
}
@keyframes lt-toast-in { from { opacity: 0; transform: translateX(-50%) translateY(-8px); } }

/* ── Log drawer toggle button (in content) ── */
.lt-log-toggle {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; color: var(--lt-muted);
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(237,231,217,.08);
  margin-top: 6px;
}
.lt-log-toggle:active { background: rgba(237,231,217,.06); }