.student-contact {
  --student-panel-bg: linear-gradient(145deg, #ffffff, #eefaff 72%);
  --student-panel-text: var(--text-color);
  --student-panel-muted: var(--muted-text);
  --student-panel-accent: #087f8c;
  --student-panel-accent-soft: rgba(8, 127, 140, 0.1);
  --student-panel-border: rgba(23, 125, 228, 0.16);
  --student-panel-control: rgba(23, 125, 228, 0.08);
  position: fixed;
  right: 20px;
  bottom: 220px;
  z-index: 1001;
  width: min(280px, calc(100vw - 32px));
  padding: 11px;
  overflow: hidden;
  color: var(--student-panel-text);
  border: 1px solid var(--student-panel-border);
  border-radius: 18px;
  background:
    radial-gradient(
      circle at 100% 0,
      rgba(60, 198, 214, 0.14),
      transparent 42%
    ),
    var(--student-panel-bg);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.16);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(12px) scale(0.98);
  transition:
    opacity 0.28s ease,
    transform 0.28s ease,
    visibility 0.28s ease;
}

.student-contact::after {
  position: absolute;
  right: -42px;
  bottom: -60px;
  width: 150px;
  height: 150px;
  content: "";
  border: 1px solid rgba(8, 127, 140, 0.14);
  border-radius: 50%;
}

.student-contact.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.student-contact-close,
.student-contact-back {
  position: absolute;
  z-index: 1;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: var(--student-panel-muted);
  border: 1px solid var(--student-panel-border);
  border-radius: 50%;
  background: var(--student-panel-control);
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.student-contact-close {
  top: 10px;
  right: 10px;
}

.student-contact-close:hover,
.student-contact-back:hover {
  color: var(--student-panel-text);
  background: var(--student-panel-accent-soft);
  transform: scale(1.06);
}

.student-contact-eyebrow {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--student-panel-accent);
  font-family: var(--inter);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  line-height: 1.2;
  text-transform: uppercase;
}

.student-contact h2 {
  max-width: 215px;
  margin: 4px 0 3px;
  color: var(--student-panel-text);
  font-family: var(--montserrat);
  font-size: 0.96rem;
  line-height: 1.2;
}

.student-contact p {
  max-width: 220px;
  margin-bottom: 6px;
  color: var(--student-panel-muted);
  font-family: var(--inter);
  font-size: 0.7rem;
  line-height: 1.3;
}

.student-contact-start {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 30px;
  padding: 0 10px;
  color: #fff;
  border: 0;
  border-radius: 9px;
  background: var(--background-btn);
  font-family: var(--inter);
  font-size: 0.7rem;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    background-color 0.2s ease;
}

.student-contact-start:hover {
  background: linear-gradient(to left, #126dcc, #00a9dc, #2fc9bd);
  transform: translateY(-2px);
}

.student-contact-topics[hidden] {
  display: none;
}

.student-contact-topics-header {
  position: relative;
  padding-left: 42px;
}

.student-contact-topics-header h2 {
  margin-top: 8px;
  font-size: 1.08rem;
}

.student-contact-back {
  top: 0;
  left: 0;
}

.student-contact-topic-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.student-contact-topic-list button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 36px;
  padding: 0 13px;
  color: var(--student-panel-text);
  border: 1px solid var(--student-panel-border);
  border-radius: 8px;
  background: var(--student-panel-control);
  font-family: var(--inter);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.student-contact-topic-list button::after {
  color: var(--student-panel-accent);
  content: "→";
  font-size: 1rem;
}

.student-contact-topic-list button:hover {
  border-color: rgba(8, 127, 140, 0.5);
  background: var(--student-panel-accent-soft);
  transform: translateX(2px);
}

.student-contact button:focus-visible {
  outline: 2px solid var(--student-panel-accent);
  outline-offset: 3px;
}

html.dark-mode .student-contact {
  --student-panel-bg: linear-gradient(145deg, #082f49, #0f172a 72%);
  --student-panel-text: #f8fafc;
  --student-panel-muted: rgba(226, 232, 240, 0.78);
  --student-panel-accent: #67e8f9;
  --student-panel-accent-soft: rgba(103, 232, 249, 0.12);
  --student-panel-border: rgba(255, 255, 255, 0.16);
  --student-panel-control: rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.28);
}

html.dark-mode .student-contact::after {
  border-color: rgba(103, 232, 249, 0.16);
}

html.dark-mode .student-contact-start {
  color: #082f49;
  background: #67e8f9;
}

html.dark-mode .student-contact-start:hover {
  background: #a5f3fc;
}

@media (max-width: 600px) {
  .student-contact {
    right: 16px;
    bottom: 220px;
    width: calc(100vw - 32px);
    padding: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .student-contact,
  .student-contact button {
    transition: none;
  }
}