/* ========== RESET & BASE ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--sv-font-family);
  background: var(--sv-bg-primary);
  color: var(--sv-text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select {
  font-family: inherit;
}

/* ========== LAYOUT ========== */
.sv-content {
  min-height: calc(100vh - var(--sv-header-height) - var(--sv-player-height));
  padding-bottom: var(--sv-player-height);
  transition: opacity 0.15s ease;
}

.sv-content.sv-loading {
  opacity: 0.5;
  pointer-events: none;
}

.sv-page-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--sv-header-height) - var(--sv-player-height));
  color: var(--sv-text-muted);
  font-size: 16px;
}

/* ========== HEADER ========== */
.sv-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: var(--sv-header-height);
  background: var(--sv-bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--sv-border);
  position: sticky;
  top: 0;
  z-index: var(--sv-z-header);
}

.sv-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--sv-text-white);
  letter-spacing: -0.5px;
}

/* ========== NAV ========== */
.sv-nav {
  display: flex;
  gap: 32px;
}

.sv-nav-link {
  color: var(--sv-text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
  padding: 4px 0;
}

.sv-nav-link:hover,
.sv-nav-link.active {
  color: var(--sv-text-white);
}

.sv-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -19px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--sv-accent);
  border-radius: 2px;
}

/* ========== SEARCH ========== */
.sv-header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sv-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--sv-bg-input);
  border: 1px solid var(--sv-border-light);
  border-radius: 8px;
  padding: 8px 14px;
  transition: all 0.2s;
}

.sv-search:focus-within {
  border-color: var(--sv-accent);
  background: var(--sv-accent-input);
}

.sv-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--sv-text-primary);
  font-size: 13px;
  width: 180px;
}

.sv-search input::placeholder {
  color: var(--sv-text-dim);
}

/* ========== ACCOUNT / AVATAR ========== */
.sv-account {
  position: relative;
}

.sv-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sv-accent), var(--sv-accent-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--sv-text-white);
  cursor: pointer;
  transition: transform 0.15s;
}

.sv-avatar:hover {
  transform: scale(1.05);
}

/* ========== DROPDOWN ========== */
.sv-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: #1a1a1a;
  border: 1px solid var(--sv-border-light);
  border-radius: 10px;
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.15s ease;
  z-index: var(--sv-z-dropdown);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.sv-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sv-dropdown-item {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--sv-text-primary);
  transition: background 0.15s;
}

.sv-dropdown-item:hover {
  background: var(--sv-bg-surface-hover);
}

.sv-dropdown-divider {
  height: 1px;
  background: var(--sv-border);
  margin: 4px 0;
}

/* ========== BOTTOM PLAYER ========== */
.sv-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--sv-bg-player);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--sv-border);
  z-index: var(--sv-z-player);
  transition: height 0.3s ease;
}

/* Normal mode layout */
.sv-player-normal {
  display: grid;
  grid-template-columns: 250px 1fr 1fr 150px;
  align-items: center;
  padding: 0 24px;
  height: var(--sv-player-height);
}

/* Hide normal when stack is active */
.sv-player.sv-stack-active .sv-player-normal {
  display: none;
}

/* Stack mode (hidden by default) */
.sv-player-stack {
  display: none;
}

.sv-player.sv-stack-active .sv-player-stack {
  display: block;
}

/* ========== STACK PLAYER ========== */
.sv-stack-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  border-bottom: 1px solid var(--sv-border);
}

.sv-stack-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  min-width: 0;
}

.sv-stack-label {
  font-weight: 600;
  color: var(--sv-accent-light);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 1px;
  background: var(--sv-accent-glow);
  padding: 3px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}

.sv-stack-root {
  color: var(--sv-text-white);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sv-stack-divider {
  color: var(--sv-text-dim);
  flex-shrink: 0;
}

.sv-stack-bpm,
.sv-stack-key {
  color: var(--sv-text-secondary);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.sv-stack-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sv-stack-btn {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--sv-bg-input);
  color: var(--sv-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.sv-stack-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--sv-text-white);
}

.sv-stack-play-btn:hover {
  background: var(--sv-accent);
  color: var(--sv-text-white);
}

.sv-stack-stop-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

.sv-stack-save-btn:hover {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

.sv-stack-close-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

/* Stack layers container */
.sv-stack-layers {
  max-height: 240px;
  overflow-y: auto;
  padding: 4px 0;
}

.sv-stack-layers:empty::after {
  content: 'Add tracks to start stacking';
  display: block;
  padding: 20px 24px;
  color: var(--sv-text-dim);
  font-size: 13px;
  text-align: center;
}

/* Individual layer row */
.sv-stack-layer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 24px;
  transition: background 0.15s;
}

.sv-stack-layer:hover {
  background: rgba(255, 255, 255, 0.03);
}

.sv-stack-layer-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--sv-text-dim);
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.sv-stack-layer.sv-stack-root-layer .sv-stack-layer-num {
  color: var(--sv-accent-light);
}

.sv-stack-layer-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--sv-text-primary);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sv-stack-root-badge {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--sv-accent-light);
  background: var(--sv-accent-glow);
  padding: 2px 6px;
  border-radius: 3px;
  flex-shrink: 0;
}

.sv-stack-layer-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* Volume slider */
.sv-stack-layer-volume {
  width: 80px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--sv-bg-input-hover);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.sv-stack-layer-volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sv-text-secondary);
  cursor: pointer;
  transition: background 0.15s;
}

.sv-stack-layer-volume::-webkit-slider-thumb:hover {
  background: var(--sv-text-white);
}

.sv-stack-layer-volume::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sv-text-secondary);
  border: none;
  cursor: pointer;
}

.sv-stack-layer-vol-label {
  font-size: 10px;
  color: var(--sv-text-dim);
  width: 30px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

/* Layer action buttons */
.sv-stack-layer-btn {
  width: 26px;
  height: 26px;
  border-radius: 5px;
  background: none;
  color: var(--sv-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.sv-stack-layer-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--sv-text-white);
}

.sv-stack-layer-mute.active {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.15);
}

.sv-stack-layer-download:hover {
  color: var(--sv-accent);
  background: var(--sv-accent-glow);
}

.sv-stack-layer-remove:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.15);
}

.sv-player-track {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sv-player-thumb {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--sv-bg-surface);
  flex-shrink: 0;
}

.sv-player-thumb-empty {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sv-player-text {
  display: flex;
  flex-direction: column;
}

.sv-player-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--sv-text-white);
}

.sv-player-pack {
  font-size: 11px;
  color: var(--sv-text-muted);
}

/* Player controls */
.sv-player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.sv-player-btn {
  color: var(--sv-text-secondary);
  padding: 4px;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sv-player-btn:hover {
  color: var(--sv-text-white);
}

.sv-player-main {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--sv-accent);
  color: var(--sv-text-white);
  transition: all 0.2s;
}

.sv-player-main:hover {
  background: var(--sv-accent-hover);
  transform: scale(1.05);
}

/* Progress bar */
.sv-player-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
}

.sv-player-time {
  font-size: 11px;
  color: var(--sv-text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 30px;
}

.sv-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--sv-bg-input-hover);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
}

.sv-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--sv-accent);
  border-radius: 4px;
  transition: width 0.1s;
}

.sv-progress-bar:hover .sv-progress-fill {
  background: var(--sv-accent-light);
}

/* Volume */
.sv-player-volume {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-end;
}

.sv-volume-bar {
  width: 80px;
  height: 4px;
  background: var(--sv-bg-input-hover);
  border-radius: 4px;
  cursor: pointer;
}

.sv-volume-fill {
  height: 100%;
  width: 70%;
  background: var(--sv-text-secondary);
  border-radius: 4px;
}

/* ========== MODALS ========== */
.sv-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.sv-modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.sv-modal {
  background: #1a1a1a;
  border: 1px solid var(--sv-border-light);
  border-radius: 14px;
  width: 90%;
  max-width: 440px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.2s ease;
}

.sv-modal-overlay.open .sv-modal {
  transform: scale(1) translateY(0);
}

.sv-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
}

.sv-modal-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--sv-text-white);
}

.sv-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: none;
  border: none;
  color: var(--sv-text-muted);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.sv-modal-close:hover {
  background: var(--sv-bg-surface-hover);
  color: var(--sv-text-white);
}

.sv-modal-body {
  padding: 20px 24px;
}

/* Auth error message */
.sv-auth-error {
  display: none;
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  color: #fca5a5;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: 8px;
}

.sv-modal-subtitle {
  font-size: 13px;
  color: var(--sv-text-secondary);
  margin-bottom: 16px;
}

.sv-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 0 24px 20px;
}

/* ========== BUTTONS ========== */
.sv-btn {
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.sv-btn-primary {
  background: var(--sv-accent);
  color: var(--sv-text-white);
}

.sv-btn-primary:hover {
  background: var(--sv-accent-hover);
}

.sv-btn-ghost {
  background: transparent;
  color: var(--sv-text-secondary);
  border: 1px solid var(--sv-border-light);
}

.sv-btn-ghost:hover {
  background: var(--sv-bg-surface-hover);
  color: var(--sv-text-white);
}

/* ========== FORM ELEMENTS ========== */
.sv-form-field {
  margin-bottom: 16px;
}

.sv-form-field:last-child {
  margin-bottom: 0;
}

.sv-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--sv-text-secondary);
  margin-bottom: 6px;
}

.sv-input {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--sv-border-light);
  border-radius: 8px;
  color: var(--sv-text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: all 0.2s;
}

.sv-input:focus {
  border-color: var(--sv-accent);
  background: var(--sv-accent-input);
}

.sv-input::placeholder {
  color: var(--sv-text-dim);
}

/* Upload area */
.sv-upload-area {
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 32px;
  text-align: center;
  color: var(--sv-text-muted);
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 20px;
}

.sv-upload-area:hover {
  border-color: var(--sv-accent-border);
  background: rgba(139, 92, 246, 0.05);
}

.sv-upload-area p {
  font-size: 13px;
  margin-top: 12px;
}

.sv-upload-link {
  color: var(--sv-accent-light);
  cursor: pointer;
}

.sv-upload-hint {
  display: block;
  font-size: 11px;
  color: var(--sv-text-dim);
  margin-top: 6px;
}

/* Modal list (for Add to Pack / Add to Collection / Add to Vybe) */
.sv-modal-search {
  margin-bottom: 12px;
}

.sv-modal-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sv-modal-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  width: 100%;
  text-align: left;
}

.sv-modal-list-item:hover {
  background: var(--sv-bg-surface-hover);
}

.sv-modal-list-thumb {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}

.sv-modal-list-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--sv-bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sv-text-secondary);
  flex-shrink: 0;
}

.sv-modal-list-info {
  display: flex;
  flex-direction: column;
}

.sv-modal-list-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--sv-text-white);
}

.sv-modal-list-meta {
  font-size: 12px;
  color: var(--sv-text-muted);
}

/* Instrument grid */
.sv-instrument-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sv-instrument-chip {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--sv-text-secondary);
  background: var(--sv-bg-surface);
  border: 1px solid var(--sv-border-light);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.sv-instrument-chip:hover {
  border-color: var(--sv-accent-border);
  color: var(--sv-text-primary);
}

.sv-instrument-chip.selected {
  background: var(--sv-accent-glow);
  border-color: var(--sv-accent);
  color: var(--sv-accent-light);
}

/* ========== VYBE COLOR PICKER ========== */
.sv-vybe-colors {
  display: flex;
  gap: 12px;
  padding: 4px 0;
}

.sv-vybe-color-chip {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid transparent;
  background: var(--chip-color);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.sv-vybe-color-chip:hover {
  transform: scale(1.15);
  box-shadow: 0 0 12px color-mix(in srgb, var(--chip-color) 40%, transparent);
}

.sv-vybe-color-chip.selected {
  border-color: var(--sv-text-white);
  transform: scale(1.15);
  box-shadow: 0 0 16px color-mix(in srgb, var(--chip-color) 50%, transparent);
}

.sv-vybe-color-chip.selected::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ========== COVER PLACEHOLDER ========== */
.sv-cover-placeholder {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(135deg, #7c3aed, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.sv-cover-placeholder::after {
  content: '';
  width: 40%;
  height: 40%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.3)' stroke-width='1.5'%3E%3Crect x='3' y='3' width='18' height='18' rx='2'/%3E%3Ccircle cx='8.5' cy='8.5' r='1.5'/%3E%3Cpath d='M21 15l-5-5L5 21'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Placeholder in track thumb context */
.sv-track-thumb.sv-cover-placeholder {
  border-radius: 6px;
}

.sv-modal-list-thumb.sv-cover-placeholder {
  border-radius: 6px;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .sv-player-normal {
    grid-template-columns: 200px 1fr 150px;
  }
  .sv-player-progress {
    display: none;
  }
  .sv-stack-layer-volume {
    width: 60px;
  }
}

@media (max-width: 768px) {
  .sv-modal {
    width: 95%;
  }
  .sv-header {
    padding: 0 16px;
  }
  .sv-nav {
    display: none;
  }
  .sv-search input {
    width: 120px;
  }
  .sv-player-normal {
    grid-template-columns: 1fr auto;
    padding: 0 16px;
    height: 64px;
  }
  .sv-player-progress,
  .sv-player-volume {
    display: none;
  }
  .sv-stack-bar {
    padding: 8px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .sv-stack-layer {
    padding: 8px 16px;
  }
  .sv-stack-layer-volume {
    width: 50px;
  }
  .sv-stack-layer-vol-label {
    display: none;
  }
}

@media (max-width: 480px) {
  .sv-search {
    display: none;
  }
}