/* ========================================================
   Keyboard Studio Dashboard - Modern Dark UI Design System
   ======================================================== */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-input: #1f293d;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-focus: #6366f1;

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.35);

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.1) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(236, 72, 153, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Container */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
  box-shadow: var(--shadow-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  font-size: 24px;
}

.brand-info h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #c7d2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-info p {
  font-size: 13px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: var(--danger);
  color: #ffffff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-2px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.stat-icon.purple { background: rgba(99, 102, 241, 0.18); color: #818cf8; }
.stat-icon.pink { background: rgba(236, 72, 153, 0.18); color: #f472b6; }
.stat-icon.green { background: rgba(16, 185, 129, 0.18); color: #34d399; }
.stat-icon.blue { background: rgba(6, 182, 212, 0.18); color: #38bdf8; }

.stat-value {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  flex: 1;
  max-width: 400px;
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14px;
  width: 100%;
}

.filter-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.select-custom {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

/* Keyboards Grid */
.keyboards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.keyboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.keyboard-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.card-media-wrapper {
  position: relative;
  height: 180px;
  background: #0f172a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: blur(2px);
  transition: var(--transition);
}

.keyboard-card:hover .card-bg-img {
  opacity: 0.6;
  transform: scale(1.05);
}

.card-preview-img {
  position: relative;
  z-index: 2;
  max-height: 140px;
  max-width: 80%;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  transition: var(--transition);
}

.keyboard-card:hover .card-preview-img {
  transform: translateY(-4px) scale(1.03);
}

.card-badge-id {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.card-badge-cat {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 3;
  background: rgba(99, 102, 241, 0.85);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
}

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.card-actions .btn {
  flex: 1;
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-color);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  color: var(--text-dim);
}

.empty-state h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-muted);
  max-width: 440px;
  margin: 0 auto 24px auto;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-box {
  background: #131b2e;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 950px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), var(--shadow-glow);
  transform: translateY(20px) scale(0.97);
  transition: var(--transition);
  overflow: hidden;
}

.modal-overlay.active .modal-box {
  transform: translateY(0) scale(1);
}

.modal-box.modal-sm {
  max-width: 480px;
}

.modal-box.modal-md {
  max-width: 650px;
}

.modal-header {
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
}

.modal-header h2 {
  font-size: 20px;
  font-weight: 700;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  transition: var(--transition);
}

.btn-close:hover {
  color: #ffffff;
  transform: rotate(90deg);
}

.modal-body {
  padding: 28px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 28px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background: rgba(255, 255, 255, 0.02);
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.badge-required {
  font-size: 11px;
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.badge-optional {
  font-size: 11px;
  background: rgba(156, 163, 175, 0.15);
  color: #9ca3af;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Section Dividers in Form */
.form-section-title {
  font-size: 15px;
  font-weight: 700;
  color: #c7d2fe;
  margin: 28px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* File Upload Dropzones */
.upload-dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  padding: 20px 14px;
  text-align: center;
  background: rgba(0, 0, 0, 0.2);
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.upload-dropzone:hover, .upload-dropzone.drag-over {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.upload-dropzone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.dropzone-icon {
  font-size: 26px;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.dropzone-label {
  font-size: 12px;
  color: var(--text-muted);
}

.dropzone-filename {
  font-size: 11px;
  color: #818cf8;
  font-weight: 600;
  word-break: break-all;
  margin-top: 4px;
}

.dropzone-preview-img {
  max-height: 80px;
  max-width: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
}

/* Keys Upload Grid */
.keys-upload-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.key-upload-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  transition: var(--transition);
}

.key-upload-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
}

.key-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.key-title {
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
}

/* Color Picker Input */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.color-input-native {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 44px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 2px;
}

.color-input-native::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input-native::-webkit-color-swatch {
  border: none;
  border-radius: var(--radius-sm);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  background: #1f293d;
  color: #ffffff;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  min-width: 280px;
  transform: translateX(100px);
  opacity: 0;
  transition: var(--transition);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }

/* Interactive Keyboard Simulator */
.keyboard-preview-canvas {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
  position: relative;
  overflow: hidden;
}

.sim-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 10px;
}

.sim-key {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  min-width: 44px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  transition: var(--transition);
}

.sim-key.spacebar {
  flex: 3;
}

.sim-key.action-key {
  flex: 1.4;
  font-size: 12px;
}

/* Category Management List */
.category-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
}

.category-title-edit {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

/* JSON Code Viewer */
.code-viewer {
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'Fira Code', monospace, Consolas;
  font-size: 13px;
  color: #38bdf8;
  max-height: 460px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Responsive */
@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .header-actions {
    width: 100%;
    flex-wrap: wrap;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    max-width: 100%;
  }
  .modal-box {
    max-height: 95vh;
  }
}