:root {
  color-scheme: light;
  --bg: #f4f6f6;
  --surface: rgba(255, 255, 255, 0.88);
  --ink: #142225;
  --muted: #647174;
  --line: rgba(20, 34, 37, 0.15);
  --accent: #d84b2f;
  --accent-dark: #a93320;
  --shadow: 0 18px 54px rgba(23, 38, 42, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body { width: 100%; min-height: 100%; margin: 0; }

body {
  min-height: 100svh;
  overflow: hidden;
  color: var(--ink);
  background:
    linear-gradient(rgba(20,34,37,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,34,37,.035) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
}

button { font: inherit; }

.app-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: 100%;
  height: 100svh;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
}

.topbar {
  z-index: 5;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 6px 4px 18px;
  border-bottom: 1px solid var(--line);
}

.eyebrow, .version { margin: 0; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .19em; text-transform: uppercase; }
h1 { margin: 6px 0 0; font-size: clamp(17px, 2.3vw, 29px); font-weight: 650; letter-spacing: .035em; line-height: 1.05; }
.version { padding-bottom: 2px; }

.viewer-stage { position: relative; min-height: 0; overflow: hidden; }

model-viewer {
  width: 100%;
  height: 100%;
  min-height: 360px;
  background: radial-gradient(circle at 50% 46%, #fff 0, rgba(255,255,255,.8) 30%, rgba(233,237,237,.25) 68%, transparent 100%);
  --poster-color: transparent;
  --progress-bar-height: 0;
}

.loader {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  background: rgba(244, 246, 246, .76);
  backdrop-filter: blur(10px);
  transition: opacity .42s ease, visibility .42s ease;
}

.loader.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-card { width: min(310px, calc(100vw - 48px)); text-align: center; }
.loader-card p { margin: 18px 0 12px; font-size: 13px; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.loader-card strong { display: block; margin-top: 9px; color: var(--muted); font-size: 11px; letter-spacing: .1em; }
.loader-mark { display: inline-block; width: 32px; height: 32px; border: 1px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; }
.progress-track { height: 2px; overflow: hidden; background: rgba(20,34,37,.12); }
.progress-track span { display: block; width: 0; height: 100%; background: var(--accent); transition: width .18s ease; }
@keyframes spin { to { transform: rotate(360deg); } }

.error-state {
  position: absolute;
  inset: 50% auto auto 50%;
  z-index: 9;
  display: flex;
  width: min(480px, calc(100% - 32px));
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(216,75,47,.3);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow);
}
.error-state[hidden] { display: none; }
.error-state > span { display: grid; width: 26px; height: 26px; flex: 0 0 auto; place-items: center; border-radius: 50%; color: white; background: var(--accent); font-weight: 800; }
.error-state strong { font-size: 14px; }
.error-state p { margin: 5px 0 0; color: var(--muted); font-size: 12px; line-height: 1.45; }

.control-dock {
  position: absolute;
  z-index: 6;
  right: max(10px, env(safe-area-inset-right));
  bottom: max(10px, env(safe-area-inset-bottom));
  left: max(10px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(150px, 1.25fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.control-button {
  min-height: 54px;
  padding: 10px 14px;
  border: 0;
  color: var(--ink);
  background: rgba(255,255,255,.9);
  cursor: pointer;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .09em;
  text-transform: uppercase;
  transition: background .2s, color .2s;
}
.control-button:hover { background: #fff; }
.control-button:focus-visible { position: relative; z-index: 1; outline: 2px solid var(--ink); outline-offset: -3px; }
.control-button small { display: block; margin-top: 3px; color: var(--muted); font-size: 8px; letter-spacing: .14em; }
.control-button.is-active small { color: var(--accent); }
.control-button--primary { color: white; background: var(--accent); }
.control-button--primary:hover { background: var(--accent-dark); }
.control-button--primary small { color: rgba(255,255,255,.75); }
.control-button:disabled { cursor: not-allowed; opacity: .52; }
.mobile-action { display: none; }

.ar-mode-panel {
  position: absolute;
  z-index: 6;
  right: max(10px, env(safe-area-inset-right));
  bottom: calc(max(10px, env(safe-area-inset-bottom)) + 66px);
  left: max(10px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: minmax(360px, 560px) minmax(220px, 1fr) auto;
  gap: 12px;
  align-items: center;
  pointer-events: none;
}
.ar-mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--line);
  box-shadow: 0 12px 34px rgba(23,38,42,.1);
  pointer-events: auto;
}
.ar-mode-button {
  min-height: 50px;
  padding: 8px 12px;
  border: 0;
  color: var(--muted);
  background: rgba(255,255,255,.9);
  cursor: pointer;
  text-align: left;
  transition: color .2s, background .2s;
}
.ar-mode-button strong, .ar-mode-button span { display: block; }
.ar-mode-button strong { font-size: 10px; letter-spacing: .075em; }
.ar-mode-button span { margin-top: 3px; font-size: 7px; letter-spacing: .12em; }
.ar-mode-button.is-selected { color: #fff; background: var(--ink); }
.ar-mode-button:disabled { cursor: wait; opacity: .55; }
.ar-mode-button:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }
.ar-mode-description { margin: 0; color: var(--muted); font-size: 9px; line-height: 1.45; pointer-events: none; }
.ar-platform-label { margin: 0; padding: 8px 10px; border: 1px solid var(--line); color: var(--ink); background: rgba(255,255,255,.8); font-size: 8px; font-weight: 800; letter-spacing: .09em; white-space: nowrap; }
.ar-platform-label[hidden] { display: none; }

.ar-live-status {
  position: absolute;
  z-index: 6;
  top: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(12px);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .12em;
}
.ar-live-status[hidden] { display: none; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(216,75,47,.12); }

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
}
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(12,22,24,.56); backdrop-filter: blur(8px); }
.modal-card { position: relative; z-index: 1; width: min(440px, 100%); max-height: 100%; overflow: auto; padding: 28px; border: 1px solid rgba(255,255,255,.3); background: #fff; box-shadow: 0 26px 90px rgba(0,0,0,.28); }
.modal-card h2 { margin: 6px 34px 22px 0; font-size: clamp(20px, 4vw, 29px); line-height: 1.08; letter-spacing: .015em; }
.modal-kicker { margin: 0; color: var(--accent); font-size: 9px; font-weight: 800; letter-spacing: .16em; }
.modal-close { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: transparent; cursor: pointer; font-size: 22px; line-height: 1; }
.modal-close:hover { background: var(--bg); }
.ar-steps { display: grid; gap: 11px; margin: 0 0 20px; padding-left: 22px; color: #304044; font-size: 13px; line-height: 1.45; }
.space-note { margin: 0; padding: 13px 14px; border-left: 2px solid var(--accent); color: var(--muted); background: var(--bg); font-size: 12px; line-height: 1.5; }
.scale-note { margin: 15px 0; font-size: 12px; font-weight: 750; letter-spacing: .04em; }
.modal-primary { width: 100%; min-height: 52px; border: 0; color: #fff; background: var(--accent); cursor: pointer; font-size: 11px; font-weight: 800; letter-spacing: .11em; }
.modal-primary:hover { background: var(--accent-dark); }
.ios-quick-look-link { position: relative; display: none; align-items: center; justify-content: center; text-decoration: none; }
.ios-quick-look-link::before { content: "URUCHOM AR"; }
.ios-quick-look-link img { position: absolute; width: 1px; height: 1px; opacity: .01; }
body.device-ios .ios-quick-look-link { display: flex; }
body.device-ios #startArButton { display: none; }
.modal-card--qr { text-align: center; }
.modal-card--qr .modal-kicker, .modal-card--qr h2 { text-align: left; }
.qr-code { display: grid; width: 228px; height: 228px; margin: 8px auto 18px; place-items: center; padding: 10px; border: 1px solid var(--line); background: #fff; }
.qr-code canvas, .qr-code img { display: block; max-width: 100%; height: auto; }
.qr-url { margin: 0 0 16px; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 10px; line-height: 1.45; overflow-wrap: anywhere; }
.qr-context-note { margin: -3px 0 16px; padding: 10px; color: #6d4b22; background: #fff6e9; font-size: 10px; line-height: 1.45; text-align: left; }
.qr-context-note[hidden] { display: none; }
.toast { position: fixed; z-index: 40; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); width: min(420px, calc(100% - 36px)); padding: 13px 16px; transform: translateX(-50%); border: 1px solid rgba(255,255,255,.18); color: #fff; background: rgba(16,29,32,.94); box-shadow: var(--shadow); font-size: 12px; text-align: center; }
.toast[hidden] { display: none; }

.debug-panel {
  position: absolute;
  z-index: 7;
  top: 14px;
  right: 14px;
  width: min(300px, calc(100% - 28px));
  max-height: calc(100% - 96px);
  overflow: auto;
  border: 1px solid rgba(23, 41, 44, .2);
  color: #dce8e8;
  background: rgba(13, 24, 26, .92);
  box-shadow: 0 16px 42px rgba(0,0,0,.18);
  backdrop-filter: blur(16px);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}
.debug-panel[hidden] { display: none; }
.debug-heading { display: flex; justify-content: space-between; padding: 10px 12px; border-bottom: 1px solid rgba(255,255,255,.14); color: #fff; font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.debug-panel dl { margin: 0; padding: 5px 12px 10px; }
.debug-panel dl div { display: grid; grid-template-columns: 42% 58%; gap: 8px; padding: 7px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.debug-panel dt { color: #829596; font-size: 9px; letter-spacing: .08em; }
.debug-panel dd { margin: 0; overflow-wrap: anywhere; color: #eef6f6; font-size: 9px; text-align: right; }

.viewer-stage:fullscreen { width: 100vw; height: 100vh; background: var(--bg); }
.viewer-stage:fullscreen model-viewer { min-height: 100vh; }

@media (max-width: 680px) {
  .app-shell { padding: max(12px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); }
  .topbar { padding: 4px 4px 12px; }
  .eyebrow { font-size: 8px; }
  h1 { max-width: 82vw; font-size: 15px; }
  .control-dock { grid-template-columns: repeat(3, 1fr); }
  .control-button { min-height: 48px; padding: 8px 5px; font-size: 8px; }
  #autoRotateButton, .desktop-action { display: none; }
  .mobile-action { display: block; }
  #resetButton { order: 1; }
  #arButton { order: 2; }
  #fullscreenButton { order: 3; }
  #shareButton { order: 4; grid-column: 1 / -1; }
  .control-button--primary { min-height: 56px; font-size: 10px; }
  .debug-panel { top: 8px; right: 8px; max-height: calc(100% - 130px); }
  .ar-live-status { top: 8px; left: 8px; }
  .modal-card { padding: 24px 20px; }
  .ar-mode-panel { bottom: calc(max(10px, env(safe-area-inset-bottom)) + 117px); grid-template-columns: 1fr; gap: 6px; }
  .ar-mode-switch { width: 100%; }
  .ar-mode-button { min-height: 46px; padding: 7px 9px; text-align: center; }
  .ar-mode-button strong { font-size: 8px; }
  .ar-mode-description { padding: 0 6px; color: #4f5c5f; font-size: 8px; text-align: center; }
  .ar-platform-label { display: none; }
}

@media (min-width: 681px) {
  body.ar-unavailable #arButton { display: none; }
  body.ar-unavailable #openPhoneButton { color: #fff; background: var(--accent); }
  body.ar-unavailable #openPhoneButton:hover { background: var(--accent-dark); }
  body.ar-unavailable .control-dock { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(170px, 1.3fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}