:root {
  --mc-accent: #2e7895;
  --mc-accent-strong: #234161;
  --mc-surface: #ffffff;
  --mc-soft: #eef7f7;
  --mc-border: #d9e5e8;
  --mc-text: #18313b;
  --mc-shadow: 0 16px 44px rgba(24, 49, 59, .2);
}

#magica-chat-root {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 9998;
  color: var(--mc-text);
  font-family: Kanit, Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

.mc-fab {
  min-width: 0;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  border: 0;
  border-radius: 999px;
  background: var(--mc-accent-strong);
  color: #fff;
  box-shadow: var(--mc-shadow);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.mc-fab:focus-visible,
.mc-icon-button:focus-visible,
.mc-action:focus-visible,
.mc-input:focus-visible,
.mc-send:focus-visible {
  outline: 3px solid rgba(68, 195, 241, .5);
  outline-offset: 2px;
}

.mc-window {
  position: absolute;
  right: 0;
  bottom: 64px;
  width: min(390px, calc(100vw - 32px));
  height: min(600px, calc(100vh - 104px - env(safe-area-inset-bottom)));
  display: none;
  grid-template-rows: auto 1fr auto auto;
  overflow: hidden;
  border: 1px solid var(--mc-border);
  border-radius: 22px;
  background: var(--mc-surface);
  box-shadow: var(--mc-shadow);
}

.mc-window.is-open { display: grid; }

.mc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
  background: linear-gradient(135deg, var(--mc-accent-strong), var(--mc-accent));
  color: #fff;
}

.mc-title { display: block; font-size: 1rem; }
.mc-subtitle { display: block; margin-top: 2px; font-size: .76rem; font-weight: 400; opacity: .88; }
.mc-head-actions { display: flex; gap: 4px; }

.mc-icon-button {
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.mc-icon-button:hover { background: rgba(255,255,255,.14); }

.mc-body {
  padding: 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #fbfdfd;
}

.mc-msg {
  width: fit-content;
  max-width: 88%;
  margin: 0 0 10px;
  padding: 10px 12px;
  border-radius: 16px;
  white-space: pre-line;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.mc-msg-bot { border: 1px solid var(--mc-border); border-top-left-radius: 5px; background: #fff; }
.mc-msg-user { margin-left: auto; border-top-right-radius: 5px; background: #dff2f7; }
.mc-msg-status { color: #5b6e75; font-size: .86rem; font-style: italic; }
.mc-msg-alert { border-color: #f0b9b9; background: #fff4f4; color: #7d2525; }

.mc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: -2px 0 12px;
}
.mc-action {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 11px;
  border: 1px solid var(--mc-accent);
  border-radius: 999px;
  background: #fff;
  color: var(--mc-accent-strong);
  font: inherit;
  font-size: .86rem;
  text-decoration: none;
  cursor: pointer;
}
.mc-action:hover { background: var(--mc-soft); color: var(--mc-accent-strong); }

.mc-notice {
  margin: 0;
  padding: 8px 14px;
  border-top: 1px solid var(--mc-border);
  background: var(--mc-soft);
  color: #4c626a;
  font-size: .72rem;
  line-height: 1.35;
}

.mc-inputbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border-top: 1px solid var(--mc-border);
  background: #fff;
}
.mc-input {
  min-width: 0;
  height: 44px;
  flex: 1;
  padding: 0 13px;
  border: 1px solid #c8d7dc;
  border-radius: 999px;
  background: #fff;
  color: var(--mc-text);
  font: inherit;
  font-size: 16px;
}
.mc-send {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--mc-accent);
  color: #fff;
  cursor: pointer;
}
.mc-send:disabled, .mc-input:disabled { opacity: .6; cursor: wait; }

@media (min-width: 768px) {
  .page-product-detail .mc-window {
    position: fixed;
    left: max(16px, env(safe-area-inset-left));
    right: auto;
    bottom: calc(80px + env(safe-area-inset-bottom));
  }
}

@media (min-width: 768px) and (max-width: 991.98px) {
  .page-product-detail .mc-window {
    width: calc(50% - 32px);
  }
}

@media (max-width: 600px) {
  #magica-chat-root { right: max(10px, env(safe-area-inset-right)); bottom: max(12px, env(safe-area-inset-bottom)); }
  .mc-window {
    position: fixed;
    left: max(8px, env(safe-area-inset-left));
    right: max(8px, env(safe-area-inset-right));
    bottom: calc(72px + env(safe-area-inset-bottom));
    width: auto;
    box-sizing: border-box;
    height: min(68vh, 560px);
    border-radius: 18px;
  }
  .mc-fab-label { font-size: .92rem; }
}

@media (prefers-reduced-motion: reduce) {
  #magica-chat-root * { scroll-behavior: auto !important; }
}