/* Universal interface — clean chat shell with stack/expand results */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg: #ffffff;
  --canvas: #ecebe7;
  --fg: #222222;
  --muted: #767676;
  --foggy: #6a6a6a;
  --line: #ececec;
  --line-2: #f3f3f2;
  --bubble: #f4f4f3;
  --user-bubble: #222222;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.10), 0 2px 6px rgba(0, 0, 0, 0.05);
  --radius: 16px;
  --radius-card: 16px;

  /* Phone */
  --phone-w: 393px;
  --phone-h: 852px;
  --phone-radius: 56px;
  --phone-bezel: 11px;
  --island-w: 124px;
  --island-h: 36px;
  --island-top: 11px;
}

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  font-size: 15px;
  line-height: 1.45;
  color: var(--fg);
  background: var(--canvas);
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
  background:
    radial-gradient(900px 600px at 25% 15%, rgba(255,255,255,0.6), transparent 60%),
    radial-gradient(700px 600px at 80% 90%, rgba(255,255,255,0.45), transparent 60%),
    var(--canvas);
}

/* ---------- Phone frame ---------- */
.phone {
  width: var(--phone-w);
  height: var(--phone-h);
  background:
    linear-gradient(180deg, #1a1a1c 0%, #0e0e0f 100%);
  border-radius: var(--phone-radius);
  padding: var(--phone-bezel);
  box-shadow:
    0 60px 120px rgba(0, 0, 0, 0.20),
    0 24px 48px rgba(0, 0, 0, 0.14),
    0 2px 6px rgba(0, 0, 0, 0.08),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.06),
    inset 0 0 0 3px rgba(0, 0, 0, 0.7);
  position: relative;
  flex-shrink: 0;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #fff;
  border-radius: calc(var(--phone-radius) - var(--phone-bezel));
  overflow: hidden;
  position: relative;
}

/* Status bar */
.status-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px 0;
  z-index: 50;
  pointer-events: none;
  font-feature-settings: 'tnum' 1;
}
.status-time {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #111;
}
.status-indicators {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #111;
}
.status-indicators svg { display: block; }

/* Dynamic island */
.island {
  position: absolute;
  top: var(--island-top);
  left: 50%;
  transform: translateX(-50%);
  width: var(--island-w);
  height: var(--island-h);
  background: #000;
  border-radius: 999px;
  z-index: 60;
  pointer-events: none;
}

/* Home indicator */
.home-indicator {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 134px;
  height: 5px;
  background: #111;
  border-radius: 3px;
  z-index: 60;
  pointer-events: none;
}

/* On small screens, drop the frame and go fullscreen */
@media (max-width: 480px) {
  body { padding: 0; }
  .phone {
    width: 100%;
    height: 100dvh;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    background: #fff;
  }
  .phone-screen {
    border-radius: 0;
  }
  .status-bar { display: none; }
  .island { display: none; }
  .home-indicator { display: none; }
}

/* ---------- App shell inside phone ---------- */
.app {
  width: 100%;
  height: 100%;
  background: var(--bg);
  display: grid;
  grid-template-rows: 1fr auto;
  grid-template-columns: minmax(0, 1fr);
  overflow: hidden;
  position: relative;
}
.app > * { min-width: 0; }

/* ---------- Chat ---------- */
.chat {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 60px 18px 16px; /* 60px top clears status bar + island */
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}

.empty {
  margin: auto 0;
  padding: 40px 16px;
  text-align: center;
  animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.empty h1 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 8px;
}
.empty p {
  color: var(--muted);
  font-size: 15px;
  max-width: 320px;
  margin: 0 auto;
}
.empty.hidden { display: none; }

/* ---------- Messages ---------- */
.msg {
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: rise 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.msg.user {
  align-self: flex-end;
  max-width: 80%;
}
.msg.ai {
  align-self: stretch;
}

.bubble {
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--bubble);
  color: var(--fg);
  font-size: 15px;
  line-height: 1.4;
  word-wrap: break-word;
}
.msg.user .bubble {
  background: var(--user-bubble);
  color: #fff;
  border-bottom-right-radius: 6px;
}
.msg.ai .bubble {
  border-bottom-left-radius: 6px;
  align-self: flex-start;
  max-width: 86%;
}
.bubble .bubble-sub {
  display: block;
  margin-top: 2px;
  color: var(--foggy);
  font-size: 13px;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Typing indicator */
.typing {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  padding: 14px 16px;
  background: var(--bubble);
  border-radius: var(--radius);
  border-bottom-left-radius: 6px;
  align-self: flex-start;
}
.typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #b8b8b6;
  animation: bounce 1.2s infinite ease-in-out both;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-4px); opacity: 1; }
}

/* ---------- Results: stack ↔ list ---------- */
.results {
  --p: 0;
  --collapsed-h: 96px;
  --expanded-h: 580px;
  --card-h: 320px;
  --row-gap: 16px;
  --n: 5;

  position: relative;
  width: 100%;
  height: calc(var(--collapsed-h) + (var(--expanded-h) - var(--collapsed-h)) * var(--p));
  overflow: hidden;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  border-radius: 14px;
  transition: cursor 0.2s ease;
}
.results[data-state="expanded"] {
  overflow-y: auto;
  cursor: default;
  touch-action: pan-y;
  -webkit-overflow-scrolling: touch;
}
.results[data-state="animating"] {
  overflow: hidden;
}
.results::-webkit-scrollbar { width: 0; display: none; }

/* Scroll spacer so .results has scrollHeight when expanded */
.results::before {
  content: '';
  display: block;
  width: 1px;
  height: calc(var(--n) * (var(--card-h) + var(--row-gap)) + 24px);
  pointer-events: none;
}

/* Pull-down handle (visible only when expanded) */
.pull-handle {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.12);
  z-index: 100;
  opacity: var(--p);
  pointer-events: none;
  transition: opacity 0.15s ease;
}

/* Cards */
.card {
  --i: 0;

  /* Collapsed: small, fanned thumbnails. Only first 3 visually distinct */
  --c-i: min(var(--i), 2);
  --c-x: calc((var(--c-i) - 1) * 26px);
  --c-y: calc(abs(var(--c-i) - 1) * 4px);
  --c-r: calc((var(--c-i) - 1) * 8deg);
  --c-s: 0.20;

  /* Expanded: vertical column */
  --e-x: 0px;
  --e-y: calc(var(--i) * (var(--card-h) + var(--row-gap)));
  --e-r: 0deg;
  --e-s: 1;

  --pi: calc(1 - var(--p));
  --x: calc(var(--c-x) * var(--pi) + var(--e-x) * var(--p));
  --y: calc(var(--c-y) * var(--pi) + var(--e-y) * var(--p));
  --r: calc(var(--c-r) * var(--pi) + var(--e-r) * var(--p));
  --s: calc(var(--c-s) * var(--pi) + var(--e-s) * var(--p));

  position: absolute;
  top: 12px;
  left: 0;
  right: 0;
  width: 100%;
  height: var(--card-h);

  background: var(--bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.06);
  border: 0;

  transform-origin: top center;
  transform: translate3d(var(--x), var(--y), 0) rotate(var(--r)) scale(var(--s));
  z-index: calc(var(--i) + 1);

  /* Hide cards beyond the first 3 when collapsed (so they don't add visual mass) */
  opacity: calc(min(1, var(--p) * 5 + max(0, 3 - var(--i))));

  text-align: left;
  font: inherit;
  color: inherit;
  cursor: inherit;
  display: block;
  padding: 0;
  will-change: transform;
}

.card-photo {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  /* When collapsed, photo fills entire card so it looks like a clean thumbnail */
  height: calc(var(--card-h) - 96px * var(--p));
  background: linear-gradient(135deg, #d8d8d4, #efefec);
  overflow: hidden;
  border-radius: var(--radius-card);
}
.card-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}
.card-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.04);
  pointer-events: none;
}

.badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  z-index: 2;
  box-shadow: 0 4px 10px rgba(0,0,0,0.16);
  border: 1px solid #fff;
  background: linear-gradient(76deg, #f0f0f0 0%, #fff 10.5%, #fff 69%, #efefef 94%);
  opacity: var(--p);
  transition: opacity 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.badge-best svg { width: 12px; height: 12px; flex-shrink: 0; }

.heart {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 24px;
  height: 24px;
  z-index: 2;
  color: #fff;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.25));
  opacity: var(--p);
}
.heart svg { display: block; width: 100%; height: 100%; }

.card-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 4px 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: var(--p);
  transform: translateY(calc(8px * (1 - var(--p))));
}
.card-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title {
  flex: 1 0 0;
  min-width: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card-rating {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--fg);
}
.card-rating svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}
.card-sub {
  color: var(--foggy);
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card-meta {
  font-size: 14px;
  margin-top: 6px;
  color: var(--fg);
}
.card-meta .price {
  font-weight: 500;
}
.card-meta .for {
  color: var(--foggy);
}

/* ---------- Composer ---------- */
.composer-area {
  background: var(--bg);
  padding: 8px 14px 24px;
  border-top: 1px solid var(--line-2);
  position: relative;
  z-index: 5;
}

.suggestions {
  display: flex;
  gap: 8px;
  padding: 6px 4px 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.suggestions::-webkit-scrollbar { display: none; }
.suggestions.hidden { display: none; }

.chip {
  flex-shrink: 0;
  padding: 8px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  font: inherit;
  font-size: 13.5px;
  color: var(--fg);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, transform 0.15s;
}
.chip:hover { background: #fafaf9; }
.chip:active { transform: scale(0.97); }

.composer {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--canvas);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 4px 4px 16px;
  transition: border-color 0.2s, background 0.2s;
}
.composer:focus-within {
  border-color: #d6d6d6;
  background: var(--bg);
}

#input {
  flex: 1;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 15px;
  padding: 10px 0;
  outline: none;
  color: var(--fg);
  min-width: 0;
}
#input::placeholder { color: var(--muted); }

.send {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: var(--user-bubble);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s, transform 0.15s, background 0.15s;
}
.send:disabled {
  opacity: 0.3;
  cursor: default;
}
.send:not(:disabled):active {
  transform: scale(0.92);
}