/* ==========================================================================
   Audio Converter – style.css
   Design: Dark Mode, Glassmorphism, smooth Animations
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Farben */
  --bg-base:        hsl(230, 20%, 7%);
  --bg-surface:     hsl(230, 18%, 11%);
  --bg-card:        hsl(230, 16%, 14%);
  --bg-card-hover:  hsl(230, 16%, 17%);
  --bg-input:       hsl(230, 16%, 18%);

  --accent:         hsl(261, 80%, 65%);
  --accent-light:   hsl(261, 80%, 75%);
  --accent-glow:    hsla(261, 80%, 65%, 0.35);
  --accent-2:       hsl(196, 80%, 55%);

  --success:        hsl(145, 65%, 48%);
  --success-bg:     hsla(145, 65%, 48%, 0.12);
  --error:          hsl(4, 75%, 58%);
  --error-bg:       hsla(4, 75%, 58%, 0.12);
  --warning:        hsl(38, 90%, 55%);

  --text-primary:   hsl(230, 15%, 95%);
  --text-secondary: hsl(230, 10%, 65%);
  --text-muted:     hsl(230, 10%, 45%);

  --border:         hsla(230, 20%, 100%, 0.07);
  --border-focus:   hsla(261, 80%, 65%, 0.6);

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   32px;
  --space-2xl:  48px;

  /* Border Radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  /* Transitions */
  --ease-out:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:   150ms;
  --dur-normal: 250ms;
  --dur-slow:   400ms;

  /* Shadows */
  --shadow-card: 0 4px 24px hsla(230, 30%, 0%, 0.35), 0 1px 4px hsla(230, 30%, 0%, 0.2);
  --shadow-glow: 0 0 32px var(--accent-glow);
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;

  /* Subtiles Hintergrundmuster */
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, hsla(261, 80%, 30%, 0.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 80% 100%, hsla(196, 80%, 25%, 0.15) 0%, transparent 60%);
  background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* --------------------------------------------------------------------------
   4. Header
   -------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: hsla(230, 20%, 7%, 0.85);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) var(--space-xl);
}

.header-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.6rem;
  animation: pulse-icon 3s ease-in-out infinite;
}

@keyframes pulse-icon {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

.logo-text strong {
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-sub {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   5. Main Layout
   -------------------------------------------------------------------------- */
.main-container {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* --------------------------------------------------------------------------
   6. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur-normal) var(--ease-out),
              box-shadow var(--dur-normal) var(--ease-out);
}

.card:hover {
  border-color: hsla(261, 80%, 65%, 0.15);
}

.card-title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   7. Drag & Drop Zone
   -------------------------------------------------------------------------- */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition:
    border-color var(--dur-normal) var(--ease-out),
    background var(--dur-normal) var(--ease-out),
    box-shadow var(--dur-normal) var(--ease-out),
    transform var(--dur-fast) var(--ease-spring);
  outline: none;
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
  pointer-events: none;
}

.drop-zone:hover,
.drop-zone:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-glow);
}

.drop-zone:hover::before,
.drop-zone:focus::before {
  opacity: 1;
}

.drop-zone.drag-over {
  border-color: var(--accent-light);
  background: hsla(261, 80%, 65%, 0.06);
  transform: scale(1.01);
  box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-glow);
}

.drop-zone.drag-over::before {
  opacity: 1;
}

.drop-zone-content {
  position: relative;
  z-index: 1;
}

.drop-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  color: var(--accent);
  transition: transform var(--dur-normal) var(--ease-spring),
              color var(--dur-normal) var(--ease-out);
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon {
  transform: translateY(-6px) scale(1.1);
  color: var(--accent-light);
}

.drop-primary {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.drop-secondary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.link-like {
  color: var(--accent-light);
  cursor: pointer;
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--dur-fast);
}

.link-like:hover {
  text-decoration-color: var(--accent-light);
}

.drop-formats {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  margin-bottom: var(--space-xs);
}

.drop-limit {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   8. File List
   -------------------------------------------------------------------------- */
.file-list {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.file-entry {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  animation: slide-in var(--dur-normal) var(--ease-spring);
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.file-entry-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
}

.file-entry-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.file-entry-name {
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-entry-size {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.file-entry-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast), background var(--dur-fast);
  line-height: 1;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.file-entry-remove:hover {
  color: var(--error);
  background: var(--error-bg);
}

/* --------------------------------------------------------------------------
   9. Settings
   -------------------------------------------------------------------------- */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 600px) {
  .settings-grid { grid-template-columns: 1fr; }
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.field-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.field-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Format Pills */
.format-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.pill {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-fast) var(--ease-out);
  font-family: inherit;
}

.pill:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  transform: translateY(-1px);
}

.pill.active {
  background: linear-gradient(135deg, var(--accent), hsla(261, 70%, 55%, 1));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 12px var(--accent-glow);
}

/* Select */
.select-wrapper {
  position: relative;
}

.custom-select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 40px 10px var(--space-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
  outline: none;
}

.custom-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-arrow {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   10. Convert Button
   -------------------------------------------------------------------------- */
.convert-row {
  display: flex;
  justify-content: center;
  padding: var(--space-sm) 0;
}

.btn-convert {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: linear-gradient(135deg, var(--accent), hsl(196, 80%, 50%));
  border: none;
  border-radius: 100px;
  padding: 14px 40px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  cursor: pointer;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 20px var(--accent-glow), 0 0 0 0 var(--accent-glow);
  transition:
    opacity var(--dur-fast),
    transform var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-fast);
  position: relative;
  overflow: hidden;
}

.btn-convert::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, hsla(0,0%,100%,0.15) 100%);
  opacity: 0;
  transition: opacity var(--dur-fast);
}

.btn-convert:hover:not(:disabled)::after {
  opacity: 1;
}

.btn-convert:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 30px var(--accent-glow), 0 0 0 4px hsla(261, 80%, 65%, 0.15);
}

.btn-convert:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.btn-convert:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-icon {
  font-size: 1.2rem;
}

/* --------------------------------------------------------------------------
   11. Jobs Section
   -------------------------------------------------------------------------- */
.jobs-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   12. Job Card
   -------------------------------------------------------------------------- */
.job-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  animation: fade-up var(--dur-slow) var(--ease-spring);
  transition: border-color var(--dur-normal);
}

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

.job-card.status-done {
  border-color: hsla(145, 65%, 48%, 0.3);
}

.job-card.status-error {
  border-color: hsla(4, 75%, 58%, 0.3);
}

.job-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.job-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  animation: spin-pause 2s linear infinite;
}

.job-card.status-done .job-icon { animation: none; }
.job-card.status-error .job-icon { animation: none; }

@keyframes spin-pause {
  0%   { transform: rotate(0deg); }
  70%  { transform: rotate(360deg); }
  100% { transform: rotate(360deg); }
}

.job-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.job-name {
  font-size: 0.95rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.job-status-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.job-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast), background var(--dur-fast);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.job-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-input);
}

/* Metadaten */
.job-meta {
  margin-bottom: var(--space-md);
  animation: fade-in var(--dur-normal) var(--ease-out);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-sm);
}

.meta-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
}

.meta-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 2px;
}

.meta-value {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  word-break: break-all;
}

/* Fortschrittsbalken */
.progress-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--bg-input);
  border-radius: 100px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 100px;
  transition: width var(--dur-slow) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0; left: -100%; bottom: 0;
  width: 100%;
  background: linear-gradient(90deg, transparent, hsla(0,0%,100%,0.4), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0%   { left: -100%; }
  100% { left: 200%; }
}

.job-card.status-done .progress-fill::after,
.job-card.status-error .progress-fill::after {
  animation: none;
}

.progress-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 36px;
  text-align: right;
}

/* Ergebnis */
.job-result {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  animation: fade-in var(--dur-normal) var(--ease-out);
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--success-bg);
  border: 1px solid hsla(145, 65%, 48%, 0.3);
  border-radius: 100px;
  padding: 8px 20px;
  color: var(--success);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  font-family: inherit;
  cursor: pointer;
  transition:
    background var(--dur-fast),
    transform var(--dur-fast) var(--ease-spring);
}

.btn-download:hover {
  background: hsla(145, 65%, 48%, 0.2);
  transform: translateY(-1px);
}

.result-size {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Fehler */
.job-error {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  background: var(--error-bg);
  border: 1px solid hsla(4, 75%, 58%, 0.25);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  animation: fade-in var(--dur-normal) var(--ease-out);
}

.error-icon {
  font-size: 1rem;
  color: var(--error);
  flex-shrink: 0;
}

.error-text {
  font-size: 0.85rem;
  color: hsl(4, 75%, 75%);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   13. Utilities
   -------------------------------------------------------------------------- */
.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.app-footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: var(--space-xl);
}

/* --------------------------------------------------------------------------
   15. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
  .app-header { padding: var(--space-md); }
  .header-inner { flex-direction: column; gap: var(--space-xs); }
  .main-container { padding: var(--space-lg) var(--space-md); }
  .card { padding: var(--space-lg); }
  .drop-zone { padding: var(--space-xl) var(--space-md); }
  .btn-convert { padding: 12px 28px; font-size: 0.95rem; }
  .meta-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --------------------------------------------------------------------------
   16. Scrollbar (Webkit)
   -------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 100px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* --------------------------------------------------------------------------
   17. Selection
   -------------------------------------------------------------------------- */
::selection {
  background: var(--accent-glow);
  color: var(--text-primary);
}