:root {
  --tutor-green: #0f5b42;
  --tutor-green-2: #167151;
  --tutor-ink: #10262b;
  --tutor-muted: #5e7175;
  --tutor-line: #dbe7e8;
}

.tutor-launcher {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 78px;
  height: 78px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  cursor: grab;
  touch-action: none;
  color: #fff;
  background: linear-gradient(145deg, #2a8a66, var(--tutor-green));
  box-shadow: 0 14px 30px rgba(15, 91, 66, .34), inset 0 1px 0 rgba(255,255,255,.4);
  transition: box-shadow .2s ease, transform .2s ease;
}
.tutor-launcher:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(15, 91, 66, .4); }
.tutor-launcher:active { cursor: grabbing; }
.tutor-launcher.is-dragging { transition: none; transform: scale(1.04); }
.tutor-portrait { position: absolute; inset: 4px; overflow: hidden; border-radius: 50%; background: radial-gradient(circle at 50% 35%,#eefaf4,#b9e4ce); }
.tutor-portrait img { position: absolute; width: 88px; height: auto; left: 50%; top: -15px; transform: translateX(-50%); pointer-events: none; user-select: none; }
.tutor-launcher .tutor-badge {
  position: absolute; right: -4px; top: -5px; min-width: 28px; height: 28px;
  display: grid; place-items: center; padding: 0 7px; border: 3px solid #fff;
  border-radius: 999px; color: var(--tutor-green); background: #fff;
  font-size: .73rem; font-weight: 900; box-shadow: 0 5px 12px rgba(16,38,43,.2);
}
.tutor-hint {
  position: fixed; z-index: 89; right: 20px; bottom: 112px; max-width: 260px;
  padding: 11px 14px; border: 1px solid var(--tutor-line); border-radius: 16px 16px 4px 16px;
  color: var(--tutor-ink); background: #fff; box-shadow: 0 12px 28px rgba(16,38,43,.16);
  font-size: .82rem; font-weight: 650;
}
.tutor-hint[hidden] { display: none; }

.tutor-panel {
  position: fixed; z-index: 88; right: 20px; bottom: 112px;
  width: min(390px, calc(100vw - 32px)); height: min(650px, calc(100vh - 140px));
  display: grid; grid-template-columns: minmax(0,1fr); grid-template-rows: auto auto 1fr auto; overflow: hidden;
  border: 1px solid var(--tutor-line); border-radius: 24px; color: var(--tutor-ink);
  background: #fff; box-shadow: 0 24px 60px rgba(3,29,33,.25);
  transform-origin: bottom right; animation: tutor-in .2s ease-out;
}
.tutor-panel[hidden] { display: none; }
.tutor-panel > * { min-width: 0; }
.tutor-message { overflow-wrap: anywhere; }
.tutor-panel:has(.tutor-ai) { grid-template-rows: auto auto auto minmax(80px,1fr) auto; }
@keyframes tutor-in { from { opacity: 0; transform: translateY(10px) scale(.97); } }
.tutor-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; color: #fff; background: linear-gradient(135deg, var(--tutor-green-2), var(--tutor-green)); }
.tutor-head strong { display: block; font-size: .95rem; }
.tutor-head span { display: block; margin-top: 2px; font-size: .7rem; opacity: .84; }
.tutor-close { width: 38px; height: 38px; border: 1px solid rgba(255,255,255,.32); border-radius: 50%; color: #fff; background: rgba(255,255,255,.12); cursor: pointer; font-size: 1.3rem; }
.tutor-context { padding: 9px 14px; border-bottom: 1px solid var(--tutor-line); color: var(--tutor-green); background: #eff8f3; font-size: .74rem; font-weight: 800; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tutor-messages { overflow-y: auto; padding: 14px; background: linear-gradient(180deg,#fff,#f6faf9); scroll-behavior: smooth; }
.tutor-message { max-width: 92%; margin: 0 0 10px; padding: 11px 13px; border-radius: 16px; font-size: .84rem; line-height: 1.45; }
.tutor-message.bot { border: 1px solid var(--tutor-line); border-bottom-left-radius: 5px; background: #fff; }
.tutor-message.user { margin-left: auto; border-bottom-right-radius: 5px; color: #fff; background: var(--tutor-green); }
.tutor-message p { margin: 0 0 8px; }
.tutor-message p:last-child { margin-bottom: 0; }
.tutor-message ol { margin: 7px 0; padding-left: 20px; }
.tutor-result { margin-top: 9px; padding-top: 9px; border-top: 1px solid var(--tutor-line); }
.tutor-result:first-of-type { margin-top: 4px; }
.tutor-result b { display: block; margin-bottom: 3px; }
.tutor-link { display: inline-flex; align-items: center; min-height: 36px; margin-top: 7px; padding: 0 12px; border-radius: 999px; color: #fff; background: var(--tutor-green); text-decoration: none; font-size: .76rem; font-weight: 800; }
.tutor-options { display: grid; gap: 6px; margin-top: 9px; }
.tutor-option, .tutor-next { min-height: 38px; padding: 7px 11px; border: 1px solid var(--tutor-line); border-radius: 11px; color: var(--tutor-ink); background: #f7fbfb; cursor: pointer; text-align: left; font-size: .78rem; }
.tutor-option.correct { border-color: var(--tutor-green); background: #e4f5ec; color: var(--tutor-green); font-weight: 800; }
.tutor-option.wrong { border-color: #c86635; background: #fff1e9; color: #7a3518; }
.tutor-option:disabled { cursor: default; opacity: .72; }
.tutor-feedback { margin-top: 8px!important; padding: 8px 10px; border-radius: 10px; background: #eef7f3; }
.tutor-next { margin-top: 8px; color: #fff; background: var(--tutor-green); text-align: center; font-weight: 800; }
.tutor-next[hidden] { display: none; }
.tutor-chips { display: flex; gap: 6px; overflow-x: auto; padding: 9px 12px; border-top: 1px solid var(--tutor-line); background: #fff; }
.tutor-chip { flex: 0 0 auto; min-height: 34px; padding: 0 11px; border: 1px solid rgba(22,113,81,.25); border-radius: 999px; color: var(--tutor-green); background: #edf8f2; cursor: pointer; font-size: .72rem; font-weight: 750; }
.tutor-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 10px; border-top: 1px solid var(--tutor-line); background: #fff; }
.tutor-ai { padding: 8px 14px; border-bottom: 1px solid #d7e5e2; font-size: 12px; color: #254c43; background: #f3faf7; }
.tutor-ai label { display: flex; align-items: center; gap: 6px; font-weight: 700; }
.tutor-ai p { margin: 5px 0; line-height: 1.35; max-height: 68px; overflow: auto; }
.tutor-ai button { min-height: 32px; border: 1px solid #aac9bd; border-radius: 8px; background: white; color: #254c43; cursor: pointer; margin-right: 6px; }
.tutor-ai-answer { white-space: pre-wrap; }
.tutor-send:disabled { opacity: .55; cursor: wait; }
.tutor-input { min-width: 0; min-height: 44px; padding: 10px 13px; border: 1px solid #bfd1d2; border-radius: 14px; color: var(--tutor-ink); background: #fff; outline: none; }
.tutor-input:focus { border-color: var(--tutor-green-2); box-shadow: 0 0 0 3px rgba(22,113,81,.12); }
.tutor-send { min-width: 46px; border: 0; border-radius: 14px; color: #fff; background: var(--tutor-green); cursor: pointer; font-weight: 900; }

@media (max-width: 640px) {
  .tutor-input { font-size: 16px; }
  .tutor-launcher {
    width: 60px;
    height: 60px;
    right: 14px;
    bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  }
  .tutor-portrait img { width: 72px; top: -12px; }
  .tutor-launcher .tutor-badge { min-width: 26px; height: 26px; right: -3px; top: -4px; }
  .tutor-panel {
    inset: auto 8px calc(8px + env(safe-area-inset-bottom, 0px));
    width: auto;
    height: min(76vh, 650px);
    border-radius: 22px;
    transform-origin: bottom center;
  }
  .tutor-panel.is-open + .tutor-launcher { visibility: hidden; }
  .tutor-hint {
    right: 12px;
    bottom: calc(82px + env(safe-area-inset-bottom, 0px));
    width: max-content;
    max-width: min(220px, calc(100vw - 104px));
    padding: 9px 11px;
    font-size: .75rem;
    line-height: 1.35;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutor-panel, .tutor-launcher { animation: none; transition: none; }
}