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

html, body {
  height: 100%;
  font-family: 'DM Sans', sans-serif;
  background: #fff;
  color: #111;
}

body { display: flex; flex-direction: column; }

/* ── Top bar ───────────────────────────────────────── */
.topbar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  height: 52px;
  border-bottom: 1px solid #efefef;
  background: #fff;
  z-index: 10;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: #666;
  text-decoration: none;
  padding: 5px 8px;
  border-radius: 7px;
  transition: background 0.15s, color 0.15s;
}
.back-btn:hover { background: #f4f4f4; color: #111; }
.topbar__sep { color: #ddd; font-size: 16px; user-select: none; }
.topbar__crumb { font-size: 13px; color: #999; }
.topbar__crumb--active { color: #111; font-weight: 500; }

/* ── Top page tabs ─────────────────────────────────── */
.top-tabs {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 16px;
  border-bottom: 1px solid #efefef;
  background: #fff;
}

.top-tab {
  border: 1px solid #e9ebf0;
  background: #f8f9fc;
  color: #5d6675;
  border-radius: 8px;
  height: 30px;
  padding: 0 12px;
  font-size: 12px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.top-tab:hover {
  background: #f1f4fb;
  color: #2f3950;
}

.top-tab--active {
  background: #eef3ff;
  color: #224389;
  border-color: #d5dff7;
}

.view-panel { display: none; }
.view-panel--active { display: block; }

/* ── How it works section ─────────────────────────── */
.how-it-works {
  flex-shrink: 0;
  border-bottom: 1px solid #efefef;
  background: #fcfcfd;
}

.how-it-works__inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 20px 18px;
}

.how-it-works__title {
  font-size: 17px;
  line-height: 1.3;
  font-weight: 600;
  color: #16181d;
  margin-bottom: 8px;
}

.how-it-works__intro {
  font-size: 14px;
  line-height: 1.6;
  color: #525a67;
  margin-bottom: 14px;
}

.how-it-works__step {
  background: #fff;
  border: 1px solid #eceef2;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
}

.how-it-works__step h3 {
  font-size: 14px;
  line-height: 1.35;
  font-weight: 600;
  color: #1f2430;
  margin-bottom: 6px;
}

.how-it-works__step p {
  font-size: 13px;
  line-height: 1.6;
  color: #5e6674;
  margin-bottom: 8px;
}

.how-it-works__step code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  background: #f6f7fb;
  border: 1px solid #eceef2;
  border-radius: 4px;
  padding: 1px 5px;
  color: #2d3958;
}

.how-it-works__code {
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #e6eaf1;
  background: #0f172a;
  color: #d9e3f0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre;
}

.how-it-works__code code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
}

/* ── Split layout ──────────────────────────────────── */
.split { flex: 1; display: flex; overflow: hidden; min-height: 0; }
.split.view-panel--active { display: flex; }

@media (max-width: 900px) {
  .how-it-works__inner {
    padding: 16px 14px 14px;
  }
  .how-it-works__title {
    font-size: 16px;
  }
  .how-it-works__step h3 {
    font-size: 13px;
  }
}

/* ── Code panel ────────────────────────────────────── */
.code-panel {
  width: 48%;
  min-width: 320px;
  border-right: 1px solid #efefef;
  display: flex;
  flex-direction: column;
  background: #0d1117;
  overflow: hidden;
}
.code-panel__header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  height: 44px;
  background: #161b22;
  border-bottom: 1px solid #21262d;
}
.code-panel__tabs { display: flex; gap: 2px; }
.code-tab {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 5px;
  color: #8b949e;
  cursor: pointer;
  user-select: none;
  border: none;
  background: transparent;
  font-family: 'DM Sans', sans-serif;
  transition: background 0.15s, color 0.15s;
}
.code-tab:hover { color: #c9d1d9; }
.code-tab--active { background: #21262d; color: #e6edf3; }
.code-block { display: none; }
.code-block--active { display: block; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-family: 'DM Sans', sans-serif;
  color: #8b949e;
  background: #21262d;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.copy-btn:hover { background: #2d333b; color: #e6edf3; border-color: #444c56; }
.copy-btn--copied { color: #3fb950 !important; border-color: #3fb950 !important; }
.code-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 0;
  scrollbar-width: thin;
  scrollbar-color: #30363d transparent;
}
.code-panel__body::-webkit-scrollbar { width: 6px; }
.code-panel__body::-webkit-scrollbar-thumb { background: #30363d; border-radius: 3px; }
pre {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.7;
  color: #e6edf3;
  padding: 0 24px;
  white-space: pre;
  tab-size: 2;
}
.t-tag  { color: #7ee787; }
.t-attr { color: #79c0ff; }
.t-val  { color: #a5d6ff; }
.t-prop { color: #79c0ff; }
.t-num  { color: #f2cc60; }
.t-sel  { color: #7ee787; }
.t-at   { color: #ff7b72; }
.t-cmt  { color: #8b949e; font-style: italic; }
.t-fn   { color: #d2a8ff; }
.ln {
  display: inline-block;
  width: 36px;
  text-align: right;
  margin-right: 16px;
  color: #3d444d;
  user-select: none;
}

/* ── Playground ────────────────────────────────────── */
.playground { flex: 1; display: flex; flex-direction: column; background: #fff; overflow: hidden; }
.playground__header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 44px;
  border-bottom: 1px solid #efefef;
}
.playground__label { font-size: 12px; font-weight: 500; color: #aaa; letter-spacing: 0.05em; text-transform: uppercase; }
.playground__hint  { font-size: 11px; color: #ccc; }
.playground__stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  padding: 40px;
}

/* ═══════════════════════════════════════════════════════
   FIGMA LAYER STACK (node 8:35) — bottom → top:

   1. grey-outline      — 1px #EDEDED stroke
   2. gradient-ring     — 2px rotating gradient stroke
   3. inner-elements    — content
   ═══════════════════════════════════════════════════════ */

@property --shimmer-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@property --beam-opacity {
  syntax: '<number>';
  initial-value: 0;
  inherits: true;
}

@property --inner-shimmer-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes shimmer-spin {
  to { --shimmer-angle: 360deg; }
}

@keyframes inner-shimmer-spin {
  to { --inner-shimmer-angle: 360deg; }
}

@keyframes beam-fade-in {
  to { --beam-opacity: 1; }
}

@keyframes beam-fade-out {
  from { --beam-opacity: 1; }
  to { --beam-opacity: 0; }
}

@keyframes beam-hue-shift {
  0% { filter: hue-rotate(-18deg) brightness(1.12) saturate(1.15); }
  50% { filter: hue-rotate(18deg) brightness(1.12) saturate(1.15); }
  100% { filter: hue-rotate(-18deg) brightness(1.12) saturate(1.15); }
}

/* Container — matches Figma 450×120, rounded 12px */
.chat-wrap {
  position: relative;
  display: inline-block;
  width: 450px;
  height: 120px;
  border-radius: 12px;
  overflow: hidden;
  background: #ffffff;
  isolation: isolate;
}

/* Outer halo bloom */
.chat-wrap::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 24px;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  filter: blur(16px);
  background:
    radial-gradient(ellipse 150px 36px at 18% 100%, rgba(71, 157, 255, 0.42), transparent 70%),
    radial-gradient(ellipse 182px 44px at 74% 100%, rgba(184, 95, 255, 0.4), transparent 72%),
    radial-gradient(ellipse 120px 26px at 44% 100%, rgba(255, 112, 198, 0.32), transparent 76%);
  transition: opacity 320ms ease;
}

/* Layer 1: grey-outline — always visible, outermost 1px */
.grey-outline {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  border: 1px solid #EDEDED;
  z-index: 3;
  pointer-events: none;
  box-sizing: border-box;
}

/* Layer 2: gradient ring sits INSIDE the grey border (inset 1px) */
.gradient-ring {
  position: absolute;
  inset: 1px;
  border-radius: 11px;
  padding: 2px;
  background: conic-gradient(
    from var(--shimmer-angle),
    #4F8EFF 0deg,
    #A855F7 40deg,
    #EC4899 75deg,
    #ffffff 105deg,
    #ffffff 255deg,
    #F472B6 285deg,
    #60A5FA 325deg,
    #4F8EFF 360deg
  );
  animation: shimmer-spin 4s linear infinite;
  opacity: 0;
  z-index: 2;
  pointer-events: none;
  transition: opacity 0.28s ease;

  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask-composite: exclude;
}

/* Inner moving sheen */
.chat-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  background:
    radial-gradient(ellipse 156px 30px at 84% 0%, rgba(96, 166, 255, 0.42), transparent 72%),
    radial-gradient(ellipse 176px 40px at 9% 100%, rgba(200, 112, 255, 0.36), transparent 74%),
    radial-gradient(ellipse 156px 34px at 52% 100%, rgba(255, 126, 201, 0.28), transparent 78%),
    radial-gradient(ellipse 116px 24px at 30% 0%, rgba(129, 165, 255, 0.22), transparent 75%);
  -webkit-mask-image:
    conic-gradient(
      from var(--inner-shimmer-angle),
      transparent 0%,
      transparent 18%,
      rgba(255, 255, 255, 0.24) 26%,
      rgba(255, 255, 255, 0.52) 38%,
      rgba(255, 255, 255, 0.7) 50%,
      rgba(255, 255, 255, 0.78) 62%,
      rgba(255, 255, 255, 0.78) 82%,
      rgba(255, 255, 255, 0.56) 90%,
      rgba(255, 255, 255, 0.26) 96%,
      transparent 99%,
      transparent 100%
    ),
    linear-gradient(white, transparent 24px, transparent calc(100% - 24px), white),
    linear-gradient(to right, white, transparent 22px, transparent calc(100% - 22px), white);
  -webkit-mask-composite: source-in, source-over;
  mask-image:
    conic-gradient(
      from var(--inner-shimmer-angle),
      transparent 0%,
      transparent 18%,
      rgba(255, 255, 255, 0.24) 26%,
      rgba(255, 255, 255, 0.52) 38%,
      rgba(255, 255, 255, 0.7) 50%,
      rgba(255, 255, 255, 0.78) 62%,
      rgba(255, 255, 255, 0.78) 82%,
      rgba(255, 255, 255, 0.56) 90%,
      rgba(255, 255, 255, 0.26) 96%,
      transparent 99%,
      transparent 100%
    ),
    linear-gradient(white, transparent 24px, transparent calc(100% - 24px), white),
    linear-gradient(to right, white, transparent 22px, transparent calc(100% - 22px), white);
  mask-composite: intersect, add;
  animation:
    inner-shimmer-spin 3.2s linear infinite,
    beam-hue-shift 9s ease-in-out infinite;
  transition: opacity 220ms ease;
}

.chat-wrap.is-active::before {
  opacity: 0.88;
}

.chat-wrap.is-cooling::before {
  opacity: 0.45;
}

.chat-wrap.is-active .chat-inner::before,
.chat-wrap.is-cooling .chat-inner::before {
  opacity: 0.90;
}

@media (prefers-reduced-motion: reduce) {
  .gradient-ring,
  .chat-inner::before {
    animation: none;
  }
  .chat-wrap {
    --beam-opacity: 0.45;
  }
}

/* Layer 3: content — inset clears grey (1px) + gradient (2px) when active */
.chat-inner {
  position: absolute;
  inset: 1px;
  border-radius: 11px;
  z-index: 4;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 24px;
  gap: 0;
  box-sizing: border-box;
}

.chat-inner > * {
  position: relative;
  z-index: 1;
}

/* ── ACTIVE: gradient ring on top of grey outline ─ */
.chat-wrap.is-active .gradient-ring,
.chat-wrap.is-cooling .gradient-ring {
  opacity: 1;
}

.chat-wrap.is-cooling .gradient-ring {
  opacity: 0.58;
}

.chat-wrap.is-active .chat-inner {
  inset: 3px;
  border-radius: 9px;
}

.chat-wrap.is-cooling .chat-inner {
  inset: 3px;
  border-radius: 9px;
}

/* ── Input elements ──────────────────────────────── */
.chat-textarea {
  width: 100%;
  min-height: 40px;
  border: none;
  outline: none;
  resize: none;
  font-family: 'Inter', 'DM Sans', sans-serif;
  font-size: 12px;
  line-height: 16px;
  color: #1a1a1a;
  background: transparent;
  caret-color: #4F8EFF;
}
.chat-textarea::placeholder { color: #717E86; }

.chat-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 0;
}

.chat-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid #2F68E5;
  background: #F9FAFB;
  box-shadow: 0 0 0 2px rgba(10, 143, 253, 0.10);
  cursor: pointer;
}
.chat-chip__label {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  line-height: 16px;
  color: #2F68E5;
  letter-spacing: 0.42px;
  white-space: nowrap;
}
.chat-chip__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  color: #2F68E5;
}

.chat-send {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border-radius: 36px;
  background: #F7EFFF;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  margin-left: auto;
  transition: background 0.15s;
}
.chat-send:hover { background: #ede0ff; }
.chat-send__icon {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: #4C0383;
}