:root {
  color-scheme: dark;
  --bg: #09101a;
  --panel: #121c2a;
  --panel-alt: #16253a;
  --panel-soft: rgba(255,255,255,0.05);
  --text: #edf2ff;
  --muted: #94a3b8;
  --accent: #5b7fff;
  --accent-strong: #85a7ff;
  --danger: #ff6b6b;
  --success: #38d9a9;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 18px 50px rgba(0,0,0,0.25);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, rgba(91,127,255,0.15), transparent 28%), linear-gradient(180deg, #09101a 0%, #060a12 100%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  padding: 24px;
}

button, input, select {
  font: inherit;
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
}

.hero-card,
.upload-panel,
.stats-grid,
.controls-panel,
.tabs,
.error-card {
  background: rgba(14, 24, 40, 0.95);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.hero-card {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  align-items: center;
  margin-bottom: 24px;
}

.hero-card h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 2.5vw, 2.8rem);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.card {
  padding: 24px;
}

.upload-panel {
  margin-bottom: 24px;
}

.upload-info h2 {
  margin: 0 0 8px;
}

.drop-zone {
  border: 2px dashed rgba(255,255,255,0.18);
  border-radius: 18px;
  padding: 36px;
  text-align: center;
  transition: border-color 0.25s ease, background 0.3s ease;
  margin: 18px 0;
  cursor: pointer;
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(91,127,255,0.08);
}

.upload-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.progress-bar-wrapper {
  margin-top: 18px;
}

.progress-label {
  margin-bottom: 10px;
  font-size: 0.92rem;
  color: var(--muted);
}

.progress-bar {
  width: 100%;
  height: 10px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 0.2s ease;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  padding: 24px;
}

.stat-title {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.stat-value {
  font-size: clamp(2rem, 3vw, 2.6rem);
  font-weight: 700;
}

.controls-panel .control-row,
.controls-panel .action-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.controls-panel .search-field,
.controls-panel .select-field {
  flex: 1 1 240px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.controls-panel input,
.controls-panel select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.controls-panel input::placeholder {
  color: rgba(255,255,255,0.5);
}

.action-row {
  justify-content: flex-end;
}

.tabs {
  margin-bottom: 24px;
}

.tab-controls {
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.tab-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.tab:hover {
  transform: translateY(-1px);
}

.tab.active {
  background: linear-gradient(135deg, rgba(91,127,255,0.18), rgba(91,127,255,0.08));
  border-color: var(--accent);
}

.tab-content {
  display: grid;
  gap: 14px;
}

.list-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  background: rgba(255,255,255,0.03);
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.07);
}

.avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(91,127,255,0.5), rgba(56,217,169,0.35));
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #fff;
}

.list-content {
  min-width: 0;
}

.list-content strong {
  font-size: 1rem;
  display: block;
}

.list-content span {
  color: var(--muted);
  font-size: 0.92rem;
}

.item-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.item-actions button,
.button {
  border: none;
  border-radius: 14px;
  padding: 10px 14px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}

/* Make buttons touch-friendly on mobile */
.button {
  min-width: 48px;
  min-height: 44px;
  padding: 12px 16px;
}

.button {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
}

.button-secondary {
  background: rgba(91,127,255,0.14);
  color: #dbe6ff;
}

.button-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
  color: #cbd5e1;
}

.button-instagram {
  background: linear-gradient(135deg, #e4405f, #5b51d8);
  color: #fff;
  font-weight: 600;
}

.button-instagram:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.hidden {
  display: none !important;
}

.error-card {
  color: #ffd7d7;
  border-color: rgba(255,107,107,0.32);
  background: rgba(255,107,107,0.08);
}

@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  body {
    padding: 16px;
  }

  .hero-card,
  .upload-panel,
  .controls-panel,
  .tabs {
    padding: 20px;
  }

  .hero-card {
    flex-direction: column;
    align-items: stretch;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .controls-panel .action-row {
    justify-content: stretch;
  }

  .tab-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .tab-actions {
    justify-content: center;
  }

  /* Optimize list items for mobile */
  .list-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .avatar {
    width: 40px;
    height: 40px;
  }

  .item-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    justify-content: stretch;
  }

  .item-actions button {
    padding: 12px 10px;
    font-size: 0.9rem;
  }

  .item-actions button:nth-child(1) {
    grid-column: 1 / -1;
  }

  .button {
    min-height: 44px;
    width: 100%;
  }

  .header-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .header-actions .button {
    width: 100%;
  }
}