/* ============================================================
   Courseware Studio — LMS-Embedded AI Learning Assistant Widget Styling
   ----------------------------------------------------------------
   Brand palette (matches coursewarestudio.ai):
     navy:   #0b1d3f
     gold:   #c9a55c
     ink:    #1a1a1a
     subtle: #6b7280
     paper:  #ffffff
     surface:#f7f7f5

   All selectors prefixed with cs-tutor- to avoid course-content
   collisions. No global tag selectors. No !important except on
   the FAB z-index (it MUST sit above arbitrary LMS chrome).

   Responsive: slide-out panel becomes full-width on screens < 640px.
   ============================================================ */

.cs-tutor-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2147483600 !important;  /* above arbitrary LMS chrome */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  min-width: 44px;
  padding: 12px 18px 12px 14px;
  border: none;
  border-radius: 999px;
  background: #0b1d3f;
  color: #ffffff;
  font: 600 14px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(11, 29, 63, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.cs-tutor-fab:hover  { transform: translateY(-1px); box-shadow: 0 8px 28px rgba(11, 29, 63, 0.4); }
.cs-tutor-fab:focus-visible  { outline: 3px solid #c9a55c; outline-offset: 3px; }

.cs-tutor-fab-icon {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #c9a55c;
  color: #0b1d3f;
  text-align: center;
  line-height: 22px;
  font-size: 14px;
  font-weight: bold;
}

/* Modal overlay — prevents pointer interaction with course content while open. */
.cs-tutor-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 29, 63, 0.35);
  z-index: 2147483610;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.cs-tutor-overlay--open {
  opacity: 1;
  pointer-events: auto;
}

/* Slide-out panel */
.cs-tutor-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  height: 100dvh;
  width: 420px;
  max-width: 100vw;
  background: #ffffff;
  color: #1a1a1a;
  z-index: 2147483620;
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(11, 29, 63, 0.18);
  transform: translateX(100%);
  transition: transform 0.25s ease;
  pointer-events: none;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.cs-tutor-panel--open { transform: translateX(0); pointer-events: auto; }

.cs-tutor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #e6e6e1;
  background: #0b1d3f;
  color: #ffffff;
}
.cs-tutor-title { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: 0.2px; line-height: 1.25; }

.cs-tutor-close {
  border: none;
  background: transparent;
  color: #ffffff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  padding: 4px 8px;
  border-radius: 4px;
}
.cs-tutor-close:hover { background: rgba(255, 255, 255, 0.12); }
.cs-tutor-close:focus-visible { outline: 3px solid #c9a55c; outline-offset: 2px; }

.cs-tutor-scope {
  padding: 10px 20px;
  background: #f7f7f5;
  border-bottom: 1px solid #e6e6e1;
}
.cs-tutor-scope-label { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: #6b7280; font-size: 13px; cursor: pointer; }
.cs-tutor-scope-checkbox { width: 20px; height: 20px; accent-color: #0b1d3f; }

.cs-tutor-log {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cs-tutor-msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 90%;
}
.cs-tutor-msg--user      { align-self: flex-end; }
.cs-tutor-msg--assistant { align-self: flex-start; }

.cs-tutor-msg-body {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.cs-tutor-msg--user      .cs-tutor-msg-body { background: #0b1d3f; color: #ffffff; border-bottom-right-radius: 4px; }
.cs-tutor-msg--assistant .cs-tutor-msg-body { background: #f3f1ea; color: #1a1a1a; border-bottom-left-radius: 4px; }

.cs-tutor-msg-cite {
  margin-top: 2px;
  padding: 0 14px;
  font-size: 12px;
  color: #6b7280;
  font-style: italic;
}

.cs-tutor-status {
  padding: 6px 20px;
  font-size: 12px;
  color: #6b7280;
  min-height: 18px;
}

.cs-tutor-fatal {
  padding: 12px 14px;
  background: #fef3c7;
  color: #6b4f00;
  border: 1px solid #f0d97a;
  border-radius: 8px;
  font-size: 13px;
}

.cs-tutor-form {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid #e6e6e1;
  background: #ffffff;
}
.cs-tutor-input {
  flex: 1;
  min-width: 0;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #d4d4cf;
  border-radius: 8px;
  font: 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1a1a1a;
  background: #ffffff;
}
.cs-tutor-input:focus-visible { outline: 2px solid #0b1d3f; outline-offset: 1px; border-color: #0b1d3f; box-shadow: 0 0 0 3px rgba(11, 29, 63, 0.12); }
.cs-tutor-input:disabled { background: #f3f1ea; color: #9ca3af; cursor: not-allowed; }

.cs-tutor-submit {
  min-height: 44px;
  min-width: 44px;
  padding: 10px 18px;
  background: #c9a55c;
  color: #0b1d3f;
  border: none;
  border-radius: 8px;
  font: 600 14px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
  transition: background 0.15s ease;
}
.cs-tutor-submit:hover    { background: #b58f3f; }
.cs-tutor-submit:focus-visible    { outline: 3px solid #0b1d3f; outline-offset: 2px; }
.cs-tutor-submit:disabled { background: #d4d4cf; color: #9ca3af; cursor: not-allowed; }

.cs-tutor-footer {
  padding: 10px 20px;
  border-top: 1px solid #e6e6e1;
  font-size: 11px;
  color: #6b7280;
  text-align: center;
  background: #f7f7f5;
}

/* Welcome card */
.cs-tutor-welcome {
  background: #fff8e7;
  border: 1px solid #f0d97a;
  border-radius: 12px;
  padding: 16px;
  align-self: stretch;
}
.cs-tutor-welcome-title { margin: 0 0 8px 0; font-size: 15px; color: #0b1d3f; }
.cs-tutor-welcome-body  { margin: 0 0 12px 0; font-size: 13px; line-height: 1.5; color: #4a4a4a; }
.cs-tutor-welcome-ok {
  min-height: 44px;
  padding: 6px 14px;
  background: #0b1d3f;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font: 600 13px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
}
.cs-tutor-welcome-ok:hover { background: #1a3055; }
.cs-tutor-welcome-ok:focus-visible { outline: 3px solid #2563eb; outline-offset: 2px; }

/* Instructor Referral & Escalation Card */
.cs-tutor-escalation-card {
  margin-top: 8px;
  padding: 12px 14px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cs-tutor-escalation-text {
  font-size: 12px;
  color: #1e3a8a;
  line-height: 1.4;
  margin: 0;
}
.cs-tutor-escalation-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  align-self: flex-start;
  min-height: 36px;
  padding: 6px 14px;
  background: #0b1d3f;
  color: #ffffff !important;
  text-decoration: none;
  border-radius: 6px;
  font: 600 12px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
  transition: background 0.15s ease;
}
.cs-tutor-escalation-btn:hover {
  background: #1e3a8a;
  color: #ffffff !important;
}
.cs-tutor-escalation-btn:focus-visible {
  outline: 3px solid #c9a55c;
  outline-offset: 2px;
}

/* Outside Course Notice */
.cs-tutor-outside-card {
  padding: 10px 14px;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  color: #4b5563;
  font-size: 13px;
  line-height: 1.4;
}

/* Mobile breakpoint — panel becomes full-screen */
@media (max-width: 640px) {
  .cs-tutor-panel {
    width: 100vw;
    box-shadow: none;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .cs-tutor-fab {
    bottom: max(16px, env(safe-area-inset-bottom));
    right: max(16px, env(safe-area-inset-right));
    padding: 10px 14px;
    font-size: 13px;
  }
  .cs-tutor-fab-label {
    display: none;  /* icon-only on mobile to save space */
  }
}

/* Print — hide tutor when learner prints the course */
@media print {
  .cs-tutor-fab,
  .cs-tutor-panel,
  .cs-tutor-overlay { display: none !important; }
}

/* Reduced motion — respect OS-level preference */
@media (prefers-reduced-motion: reduce) {
  .cs-tutor-fab,
  .cs-tutor-panel,
  .cs-tutor-overlay { transition: none; }
}