/* =========================
   Melody Master Classroom Student
   Clean rebase: real desktop Melody Master UI + thin classroom layer.
   Does not alter the solo app.
========================= */

body.classroom-student {
  min-height: 100vh;
}

.classroom-gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 28px;
  background:
    radial-gradient(circle at 18% 18%, rgba(56, 189, 248, .18), transparent 28%),
    radial-gradient(circle at 82% 28%, rgba(168, 85, 247, .20), transparent 30%),
    radial-gradient(circle at 52% 94%, rgba(236, 72, 153, .13), transparent 34%),
    #050b16;
}

.classroom-bg-orb {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 999px;
  filter: blur(18px);
  opacity: .56;
  pointer-events: none;
}

.classroom-bg-orb-a {
  left: -100px;
  top: -80px;
  background: rgba(56, 189, 248, .16);
}

.classroom-bg-orb-b {
  right: -100px;
  bottom: -110px;
  background: rgba(168, 85, 247, .17);
}

.classroom-card {
  position: relative;
  width: min(560px, calc(100vw - 42px));
  border: 1px solid rgba(148, 163, 184, .22);
  border-radius: 28px;
  padding: 30px;
  background:
    linear-gradient(145deg, rgba(15, 23, 42, .92), rgba(8, 13, 27, .80)),
    rgba(15, 23, 42, .70);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .42);
  backdrop-filter: blur(18px);
  color: #f8fafc;
}

.classroom-card h1 {
  margin: 8px 0 10px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: .98;
  letter-spacing: -.06em;
}

.classroom-muted {
  margin: 0 0 22px;
  color: rgba(226, 232, 240, .74);
  line-height: 1.55;
}

.classroom-brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.classroom-brand-lockup strong {
  font-size: 1.55rem;
  letter-spacing: -.06em;
}

.classroom-brand-lockup strong span { color: #f8fafc; }
.classroom-brand-lockup strong em {
  font-style: normal;
  background: linear-gradient(135deg, #38bdf8, #a855f7, #ec4899);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.classroom-brand-centred {
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

.classroom-wave {
  display: inline-flex;
  align-items: end;
  gap: 3px;
  height: 34px;
}

.classroom-wave span {
  width: 5px;
  min-height: 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, #38bdf8, #a855f7, #ec4899);
  box-shadow: 0 0 18px rgba(56, 189, 248, .22);
  animation: classroomWave 1.25s ease-in-out infinite;
}

.classroom-wave span:nth-child(2) { height: 22px; animation-delay: .08s; }
.classroom-wave span:nth-child(3) { height: 30px; animation-delay: .16s; }
.classroom-wave span:nth-child(4) { height: 18px; animation-delay: .24s; }
.classroom-wave span:nth-child(5) { height: 28px; animation-delay: .32s; }
.classroom-wave span:nth-child(6) { height: 16px; animation-delay: .40s; }
.classroom-wave span:nth-child(7) { height: 24px; animation-delay: .48s; }

.classroom-wave-large {
  height: 58px;
  transform: scale(1.25);
  transform-origin: center;
}

@keyframes classroomWave {
  0%, 100% { transform: scaleY(.72); opacity: .78; }
  50% { transform: scaleY(1.18); opacity: 1; }
}

.classroom-join-form {
  display: grid;
  gap: 16px;
}

.classroom-join-form label {
  display: grid;
  gap: 7px;
  color: rgba(226, 232, 240, .78);
  font-size: .86rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.classroom-join-form input {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, .28);
  border-radius: 18px;
  padding: 15px 16px;
  outline: none;
  background: rgba(2, 6, 23, .46);
  color: #f8fafc;
  font-size: 1.05rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}

.classroom-join-form input:focus {
  border-color: rgba(56, 189, 248, .62);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, .12);
}

.classroom-join-button {
  justify-content: center;
  min-height: 50px;
  margin-top: 6px;
}

.classroom-message {
  min-height: 1.4em;
  margin: 14px 0 0;
  color: rgba(226, 232, 240, .78);
}

.classroom-message.is-bad { color: #fca5a5; }
.classroom-message.is-good { color: #86efac; }

.classroom-audio-button {
  justify-content: center;
  width: 100%;
  margin-top: 18px;
}

.classroom-audio-button.is-enabled {
  opacity: .72;
}

.classroom-audio-status {
  min-height: 1.35em;
  margin: 12px 0 0;
  color: rgba(226, 232, 240, .72);
  font-size: .9rem;
  line-height: 1.35;
  text-align: center;
}

.classroom-audio-status.is-good { color: #86efac; }
.classroom-audio-status.is-bad { color: #fca5a5; }

.classroom-phase-join #classroomWaitCard,
.classroom-phase-waiting #classroomJoinCard,
.classroom-phase-active #classroomGate {
  display: none;
}

.classroom-phase-join .classroom-app-shell,
.classroom-phase-waiting .classroom-app-shell {
  display: none;
}

.classroom-phase-active .classroom-gate {
  display: none;
}

body.classroom-student #startButton,
body.classroom-student #playButton,
body.classroom-student #checkAnswerButton,
body.classroom-student #showAnswerButton,
body.classroom-student #restartButton,
body.classroom-student #settingsToggle,
body.classroom-student #advancedSettings,
body.classroom-student .score-close-button {
  display: none !important;
}

body.classroom-student .classroom-submit-button {
  display: inline-flex;
}

body.classroom-student .classroom-submit-button:disabled {
  opacity: .48;
  cursor: not-allowed;
}

body.classroom-student .setup-panel .melody-mode-grid {
  visibility: hidden;
  pointer-events: none;
}

body.classroom-student .setup-panel .settings-popover-wrap {
  pointer-events: none;
  opacity: .78;
}

body.classroom-student .setup-panel #setupMessage::before {
  content: "Live classroom session. Teacher controls playback. ";
}

.classroom-status-panel {
  display: grid;
  gap: 14px;
}

.classroom-status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  border-radius: 999px;
  padding: 7px 11px;
  border: 1px solid rgba(56, 189, 248, .24);
  background: rgba(56, 189, 248, .10);
  color: rgba(226, 232, 240, .86);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.classroom-status-panel h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -.04em;
}

.classroom-status-panel p {
  margin: 0;
  color: rgba(226, 232, 240, .74);
  line-height: 1.48;
}

.classroom-status-panel.is-submitted {
  border-color: rgba(110, 231, 183, .35);
}

body.classroom-student .dictation-instructions span:last-child {
  color: rgba(110, 231, 183, .94);
}

/* Classroom safety: students should not see or use the Teacher Mode shortcut after joining. */
body.classroom-student .teacher-mode-topbar-link {
  visibility: hidden !important;
  pointer-events: none !important;
}

/* =========================
   Classroom student MM upgrades copied from solo Melody Master
   Student-view only. Solo app and Teacher Mode controls are unaffected.
========================= */

body.classroom-student .classroom-reveal-button {
  display: inline-flex;
  justify-content: center;
  min-height: 44px;
}

body.classroom-student .classroom-reveal-button[hidden] {
  display: none !important;
}

body.classroom-student .classroom-submit-button,
body.classroom-student .classroom-reveal-button {
  white-space: nowrap;
}

body.classroom-student .classroom-gcse-feedback-panel {
  gap: 16px;
}

body.classroom-student .classroom-gcse-feedback-panel .diagnostic-feedback-tile strong {
  font-size: clamp(.92rem, 1.5vw, 1.08rem);
  line-height: 1.38;
}

body.classroom-student .classroom-round-summary-panel .mm-round-review-hero {
  margin: 0;
}

body.classroom-student .classroom-round-summary-panel .mm-round-review-list {
  max-height: 28vh;
  overflow: auto;
  padding-right: 4px;
}

body.classroom-student.classroom-phase-active .score-close-button {
  display: none !important;
  pointer-events: none !important;
}

body.classroom-student.classroom-phase-active .quiz-panel.is-score-expanded .score-track-info,
body.classroom-student.classroom-phase-active .quiz-panel.is-complete.is-score-expanded .score-track-info,
body.classroom-student.classroom-phase-active .quiz-panel.is-active.is-score-expanded .score-track-info {
  display: grid;
  top: calc(50% + clamp(82px, 7.2vw, 118px));
  margin-top: 0;
}

body.classroom-student.classroom-phase-active .quiz-panel.is-score-expanded .dictation-workspace.no-drag-workspace {
  background: transparent;
}

body.classroom-student.classroom-phase-active .quiz-panel.is-score-expanded .score-shell:not(.is-score-expanded) {
  visibility: hidden;
}

@media (max-width: 760px) {
  body.classroom-student .dictation-toolbar {
    gap: 10px;
  }

  body.classroom-student .classroom-submit-button,
  body.classroom-student .classroom-reveal-button {
    flex: 1 1 160px;
  }

  body.classroom-student .classroom-round-summary-panel .mm-round-review-list {
    max-height: 34vh;
  }

  body.classroom-student.classroom-phase-active .quiz-panel.is-score-expanded .score-track-info,
  body.classroom-student.classroom-phase-active .quiz-panel.is-complete.is-score-expanded .score-track-info,
  body.classroom-student.classroom-phase-active .quiz-panel.is-active.is-score-expanded .score-track-info {
    top: calc(50% + 76px);
  }
}

/* =========================
   Classroom student final round feedback pop-out
   Student-view only. Main Melody Master app unaffected.
========================= */
.classroom-round-feedback-overlay {
  position: fixed;
  inset: 0;
  z-index: 1500;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 42%, rgba(56, 189, 248, .18), transparent 34%),
    rgba(2, 8, 19, .76);
  backdrop-filter: blur(16px);
}

.classroom-round-feedback-overlay[hidden] {
  display: none !important;
}

.classroom-round-feedback-card {
  width: min(760px, calc(100vw - 34px));
  max-height: min(82vh, 760px);
  overflow: auto;
  border: 1px solid rgba(56, 189, 248, .22);
  border-radius: 30px;
  padding: clamp(18px, 2.2vw, 26px);
  color: rgba(248, 250, 252, .96);
  background:
    radial-gradient(circle at 88% 8%, rgba(56, 189, 248, .16), transparent 34%),
    radial-gradient(circle at 8% 92%, rgba(251, 113, 133, .12), transparent 38%),
    linear-gradient(145deg, rgba(15, 23, 42, .97), rgba(2, 6, 23, .94));
  box-shadow:
    0 34px 110px rgba(0, 0, 0, .58),
    0 0 0 1px rgba(56, 189, 248, .16),
    0 0 56px rgba(56, 189, 248, .15);
  animation: classroomRoundFeedbackIn .38s cubic-bezier(.22, 1, .36, 1) both;
}

.classroom-round-feedback-card h2 {
  margin: 0 0 16px;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1.04;
  letter-spacing: -.055em;
}

.classroom-round-feedback-content {
  display: grid;
  gap: 12px;
}

.classroom-round-feedback-card .mm-round-review-hero {
  margin: 0;
}

.classroom-round-feedback-card .mm-round-review-list {
  max-height: min(32vh, 300px);
  overflow: auto;
  padding-right: 4px;
}

.classroom-round-feedback-note {
  margin: 16px 0 0;
  color: rgba(226, 232, 240, .72);
  text-align: center;
  line-height: 1.4;
}

body.classroom-round-feedback-open .classroom-app-shell {
  filter: saturate(.92) brightness(.72);
}

@keyframes classroomRoundFeedbackIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(.965);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 760px) {
  .classroom-round-feedback-overlay {
    padding: 12px;
  }

  .classroom-round-feedback-card {
    max-height: 86vh;
  }
}