:root {
  color-scheme: dark;
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #16161d;
  --color-bg-card: #1d1d27;
  --color-bg-hover: #252533;
  --color-accent: #6366f1;
  --color-accent-hover: #7c7ff3;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-text-primary: #ffffff;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-focus: rgba(99, 102, 241, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #0a0a0f 0%, #16161d 100%);
  color: var(--color-text-primary);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  border-radius: 12px;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  cursor: pointer;
  font-weight: 700;
  padding: 12px 18px;
  transition: all 0.2s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
  background: var(--color-bg-hover);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button.primary,
.result button,
.version-row button {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
}

button.secondary {
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

button.danger {
  background: rgba(239, 68, 68, 0.14);
  color: #fecaca;
}

.requests-page {
  min-height: 100vh;
  padding: 16px;
  padding-bottom: calc(72px + env(safe-area-inset-bottom, 16px));
  animation: fadeInUp 0.5s ease;
}

.container {
  max-width: 768px;
  margin: 0 auto;
}

.header {
  text-align: center;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease;
}

.app-icon {
  width: 76px;
  height: 76px;
  object-fit: contain;
  margin: 8px auto 14px;
  display: block;
  filter: drop-shadow(0 12px 24px rgba(99, 102, 241, 0.32));
}

.header-title {
  margin: 0 0 8px;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-subtitle {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: clamp(14px, 2.5vw, 16px);
}

.card {
  margin-bottom: 20px;
  padding: 24px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-bg-card);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.6s ease backwards;
}

.card:nth-child(2) {
  animation-delay: 0.1s;
}

.card:nth-child(3) {
  animation-delay: 0.2s;
}

.singer-card {
  position: relative;
}

.singer-card::before {
  content: "";
  position: absolute;
  inset: 0;
  height: 3px;
  background: linear-gradient(45deg, #6366f1, #a855f7, #ec4899, #6366f1);
  background-size: 300% 300%;
  animation: gradientShift 4s ease infinite;
}

.form-label {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text-secondary);
  font-weight: 700;
}

.form-input,
.search-input {
  width: 100%;
  border: 2px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  outline: none;
  transition: all 0.2s ease;
}

.form-input {
  padding: 14px 16px;
}

.form-input:focus,
.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.search-wrapper {
  position: relative;
  margin-bottom: 12px;
}

.search-input {
  padding: 16px 48px 16px 16px;
}

.search-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.panel-heading,
.result,
.queue-item,
.version-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-heading {
  justify-content: space-between;
  margin-bottom: 14px;
}

.panel-heading h2 {
  margin: 0;
  font-size: 20px;
}

.message,
.empty {
  color: var(--color-text-muted);
}

.message {
  min-height: 22px;
  margin: 10px 0;
}

.message.error {
  color: var(--color-danger);
}

.results,
.queue {
  display: grid;
  gap: 12px;
}

.result,
.queue-item,
.version-row {
  justify-content: space-between;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 16px;
  background: var(--color-bg-secondary);
  transition: all 0.2s ease;
}

.result:hover,
.queue-item:hover,
.version-row:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-hover);
}

.result h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.result p,
.queue-item span,
.version-row span {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.queue-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.queue-controls button {
  padding: 8px 12px;
}

.version-dialog {
  width: min(44rem, calc(100% - 2rem));
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  padding: 0;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.version-dialog::backdrop {
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(4px);
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--color-border);
}

.dialog-header h2 {
  margin: 0;
  font-size: 20px;
}

.version-list {
  display: grid;
  gap: 12px;
  padding: 20px;
}

.version-row span {
  display: block;
  margin-top: 4px;
}

@keyframes fadeInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@media (max-width: 640px) {
  .card {
    padding: 20px;
  }

  .result,
  .queue-item,
  .version-row {
    align-items: stretch;
    flex-direction: column;
  }

  .queue-controls,
  .search-actions {
    justify-content: stretch;
  }

  .queue-controls button,
  .search-actions button {
    flex: 1;
  }
}