/* =========================================================
   LEARN MODE + MELODY BROWSER STYLES
   ========================================================= */

/* --- Learn Panel (top bar during learning) --- */
#learn-panel {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9000;
  background: rgba(10, 10, 30, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 16px;
  color: #fff;
  font-family: system-ui, -apple-system, sans-serif;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

#learn-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

#learn-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

#learn-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  padding: 0 4px;
  opacity: 0.7;
  transition: opacity 0.2s;
}
#learn-close:hover { opacity: 1; }

#learn-progress-bar {
  height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 4px;
}

#learn-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4fc3f7, #81c784);
  border-radius: 2px;
  transition: width 0.3s ease;
}

#learn-status {
  font-size: 12px;
  opacity: 0.7;
  text-align: center;
}

/* --- Melody Browser (overlay) --- */
#melody-browser {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 8500;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow: hidden;
}

#melody-browser-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(420px, 92vw);
  max-height: 80vh;
  background: rgba(18, 18, 40, 0.97);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: system-ui, -apple-system, sans-serif;
  color: #fff;
}

#melody-browser-header {
  padding: 14px 16px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: relative;
}

#melody-browser-header h3 {
  margin: 0 0 10px 0;
  font-size: 17px;
  font-weight: 600;
}

#melody-browser-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s;
}
#melody-browser-close:hover { opacity: 1; }

/* Category tabs */
#melody-cat-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.cat-tab {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: #ccc;
  font-size: 12px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.cat-tab:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.cat-tab.active {
  background: rgba(79, 195, 247, 0.25);
  border-color: rgba(79, 195, 247, 0.4);
  color: #4fc3f7;
}

/* Melody list */
#melody-list {
  overflow-y: auto;
  padding: 8px;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}

.melody-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}
.melody-item:hover {
  background: rgba(255,255,255,0.08);
}
.melody-item:active {
  background: rgba(79, 195, 247, 0.15);
}

.melody-name {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
}

.melody-cat {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.07);
  color: #aaa;
  text-transform: capitalize;
}

.melody-len {
  font-size: 11px;
  color: #666;
  white-space: nowrap;
}

/* Beginner path */
.beginner-section {
  padding: 10px 12px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.beginner-title {
  font-size: 13px;
  font-weight: 600;
  color: #81c784;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.beginner-item {
  border-left: 3px solid rgba(129,199,132,0.5);
  margin-bottom: 2px;
}
.beginner-item:hover {
  border-left-color: #81c784;
}

.beginner-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(129,199,132,0.2);
  color: #81c784;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

/* Show more button */
.show-more-btn {
  display: block;
  width: calc(100% - 16px);
  margin: 8px auto;
  padding: 10px;
  background: rgba(255,255,255,0.05);
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: 8px;
  color: #888;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.show-more-btn:hover {
  background: rgba(255,255,255,0.1);
  color: #bbb;
  border-color: rgba(255,255,255,0.25);
}