:root {
  --bg: #f5f1ea;
  --panel: #fffaf2;
  --ink: #1f1c18;
  --muted: #6d6457;
  --line: #d8c9b2;
  --accent: #c85f22;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: #ecf3ff;
  background-color: #060914;
  background-image:
    radial-gradient(circle at 12% 18%, rgba(255, 255, 255, 0.9) 0 1.4px, transparent 2px),
    radial-gradient(circle at 82% 28%, rgba(255, 255, 255, 0.85) 0 1.2px, transparent 1.9px),
    radial-gradient(circle at 45% 74%, rgba(255, 255, 255, 0.8) 0 1.3px, transparent 2px),
    radial-gradient(circle at 66% 12%, rgba(173, 206, 255, 0.7) 0 2.2px, transparent 3px),
    radial-gradient(circle at 26% 84%, rgba(184, 166, 255, 0.62) 0 2px, transparent 2.8px),
    radial-gradient(circle at 6% 60%, rgba(255, 255, 255, 0.72) 0 1px, transparent 1.7px),
    radial-gradient(circle at 93% 64%, rgba(255, 255, 255, 0.68) 0 1px, transparent 1.7px),
    radial-gradient(ellipse at top, #1a2342 0%, #060914 55%, #03050d 100%);
  background-attachment: fixed;
}

.header {
  padding: 1.2rem 1rem 0.5rem;
}

.header h1 {
  margin: 0;
}

.sub {
  margin: 0.2rem 0 0;
  color: #d2def7;
}

.screen {
  padding: 1rem;
}

.home-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  min-height: 220px;
  color: var(--ink);
}

#study-panel {
  max-width: 1100px;
  margin: 0 auto;
  background: linear-gradient(180deg, #fff6e8 0%, #ffeccd 100%);
  border: 2px solid #f2b562;
  box-shadow: 0 0 0 3px rgba(242, 181, 98, 0.22), 0 12px 24px rgba(0, 0, 0, 0.12);
}

.admin-panel {
  max-width: 900px;
  margin: 0 auto;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.panel-head .actions {
  margin-top: 0;
}

.study-header-row {
  display: block;
}

.courses-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.8rem;
  max-height: 260px;
  overflow: auto;
}

.course-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.7rem;
  cursor: pointer;
  background: #fff;
}

.course-item .actions {
  margin-top: 0.55rem;
}

.course-item.active {
  border: 2px solid #c85f22;
  background: linear-gradient(180deg, #ffd9a4 0%, #ffc27a 100%);
  box-shadow: 0 0 0 3px rgba(200, 95, 34, 0.18);
}

.course-item.launch-pulse {
  animation: launchPulse 0.5s ease;
}

.status-row {
  display: grid;
  grid-template-columns: 4fr 1fr;
  gap: 0.8rem;
  margin: 0.7rem 0 0.8rem;
  align-items: stretch;
  width: 100%;
}

.status-box {
  min-width: 0;
  padding: 0.9rem 1rem;
  border: 2px solid #9fa6b2;
  border-radius: 20px;
  background: #c9ced7;
}

.status-box p {
  margin: 0;
  font-size: 0.95rem;
  color: #1b2538;
  line-height: 1.3;
}

.status-toggle-btn {
  width: 100%;
  height: 100%;
  min-height: 82px;
  font-weight: 700;
  font-size: 1.05rem;
  border: 2px solid #9fa6b2;
  border-radius: 18px;
  background: #c9ced7;
  color: #182338;
  justify-self: end;
}

#study-title {
  margin: 0;
  font-size: 2.1rem;
  font-weight: 800;
  color: #111b34;
}

#study-panel.status-compact .study-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

#study-panel.status-compact .status-row {
  grid-template-columns: 1fr;
  margin: 0;
  width: auto;
}

#study-panel.status-compact .status-toggle-btn {
  min-height: 42px;
  padding: 0.4rem 0.85rem;
  min-width: 120px;
  border-radius: 12px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
  min-height: 220px;
  background: #fff;
}

.card h3 {
  margin: 0 0 0.3rem;
}

.card p {
  margin: 0.2rem 0 1rem;
  line-height: 1.35;
}

.topic-line {
  margin: 0 0 0.45rem;
  font-weight: 700;
  color: #273550;
}

.answer-image {
  display: block;
  max-width: 100%;
  max-height: 320px;
  border-radius: 10px;
  margin-top: 0.6rem;
  border: 1px solid var(--line);
}

.actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.7rem;
  flex-wrap: wrap;
}

.btn,
.file-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
  font-size: 0.94rem;
  text-align: center;
}

.btn:hover,
.file-btn:hover {
  border-color: var(--accent);
}

.btn.success {
  border-color: #8acb8d;
  color: #1f5f22;
}

.btn.start-highlight {
  border: 2px solid #c85f22;
  background: linear-gradient(180deg, #ffd9a4 0%, #ffc27a 100%);
  color: #1f1c18;
  font-weight: 800;
}

.btn.danger {
  border-color: #d59696;
  color: #7e1f1f;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.file-btn {
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.file-btn input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.file-btn.disabled input {
  cursor: not-allowed;
}

.stats,
.hint,
.empty {
  color: var(--muted);
}

.hidden {
  display: none;
}

.admin-entry {
  color: #ecf3ff;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.admin-entry p {
  margin: 0;
  font-weight: 700;
}

input,
textarea,
select {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem;
  width: 100%;
}

dialog {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
  width: min(620px, 95vw);
}

#create-course-form {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.draft-cards-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 200px;
  overflow: auto;
  padding: 0.4rem;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fff;
}

.draft-card-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffaf2;
}

#create-course-form menu {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  padding: 0;
  margin: 0;
}

.audio-wave-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.audio-wave {
  width: 100%;
  height: 120px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0f1730;
}

.audio-sliders {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

#play-edit-audio-btn {
  min-width: 56px;
  font-size: 1.05rem;
  font-weight: 700;
}

.btn.recording {
  background: #ffe2e2;
  border-color: #d23838;
  color: #7f1111;
}

.feedback-flash {
  box-shadow: 0 0 0 3px rgba(255, 189, 91, 0.55);
  transition: box-shadow 0.15s ease;
}

@media (max-width: 980px) {
  .home-layout {
    max-width: none;
  }

  .audio-sliders {
    grid-template-columns: 1fr;
  }
}

.admin-link-line {
  margin: 0;
  color: #ecf3ff;
  text-align: left;
}

.admin-link-line a {
  color: #ecf3ff;
  font-weight: 700;
  text-decoration: underline;
}

.admin-link-line .sep {
  margin: 0 0.3rem;
  color: #cddcf7;
}

.admin-link-line a:hover {
  color: #ffffff;
}

@keyframes launchPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 189, 91, 0.65);
  }
  100% {
    box-shadow: 0 0 0 8px rgba(255, 189, 91, 0);
  }
}