/* ============================================
   NeuralLens — Transfer Learning Studio
   Premium Light Theme
   ============================================ */

:root {
  --bg: #f0efea;
  --bg2: #e8e6df;
  --surface: rgba(255,255,255,0.75);
  --surface2: rgba(255,255,255,0.5);
  --border: rgba(0,0,0,0.08);
  --text: #1a1814;
  --text2: #6b6760;
  --accent: #e8652a;
  --accent2: #f5a623;
  --accent3: #2a9de8;
  --success: #27ae60;
  --danger: #e74c3c;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'DM Sans', sans-serif;
  --font-display: 'Syne', sans-serif;
  --sidebar-w: 280px;
  --right-w: 300px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* NOISE TEXTURE OVERLAY */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0;
}

/* HEADER */
.app-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: rgba(240,239,234,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  font-size: 26px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 800;
  letter-spacing: -0.5px;
}
.logo-tag {
  font-size: 11px; color: var(--text2);
  background: var(--surface);
  padding: 3px 8px; border-radius: 20px;
  border: 1px solid var(--border);
}
.header-actions { display: flex; gap: 8px; }

/* BUTTONS */
.btn-primary {
  background: var(--accent);
  color: #fff; border: none;
  padding: 8px 16px; border-radius: 8px;
  font-family: var(--font); font-size: 13px; font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary:hover { background: #d4531a; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(232,101,42,0.35); }

.btn-ghost {
  background: transparent;
  color: var(--text2); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 8px;
  font-family: var(--font); font-size: 13px;
  cursor: pointer; transition: all 0.2s;
}
.btn-ghost:hover { background: var(--surface); color: var(--text); }

.btn-add {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; border: none;
  padding: 7px 14px; border-radius: 8px;
  font-family: var(--font); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.btn-add:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232,101,42,0.4); }

.btn-train {
  background: linear-gradient(135deg, #2a9de8, #1a6bbf);
  color: #fff; border: none;
  padding: 10px 24px; border-radius: 10px;
  font-family: var(--font); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.25s;
  width: 100%;
}
.btn-train:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(42,157,232,0.4); }
.btn-train:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-cam {
  background: var(--surface);
  color: var(--text); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 8px;
  font-family: var(--font); font-size: 13px;
  cursor: pointer; transition: all 0.2s;
}
.btn-cam:hover { background: rgba(255,255,255,0.9); }
.btn-cam:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-capture {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; border: none; font-weight: 600;
}
.btn-capture:hover:not(:disabled) { box-shadow: 0 4px 12px rgba(232,101,42,0.4); }

.btn-upload {
  display: inline-block;
  background: var(--surface);
  color: var(--text); border: 1px solid var(--border);
  padding: 8px 18px; border-radius: 8px;
  font-family: var(--font); font-size: 13px;
  cursor: pointer; transition: all 0.2s;
}
.btn-upload:hover { background: rgba(255,255,255,0.9); }

/* LAYOUT */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--right-w);
  gap: 0;
  min-height: calc(100vh - 57px);
  position: relative; z-index: 1;
}

/* SIDEBAR */
.sidebar {
  background: var(--surface2);
  backdrop-filter: blur(12px);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 14px;
  overflow-y: auto;
}
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
}
.sidebar-header h2 {
  font-family: var(--font-display);
  font-size: 15px; font-weight: 700;
}

.class-list { display: flex; flex-direction: column; gap: 8px; flex: 1; }

.class-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: all 0.2s;
  position: relative; overflow: hidden;
}
.class-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--class-color, var(--accent));
}
.class-card:hover { box-shadow: var(--shadow); transform: translateX(2px); }
.class-card.active { border-color: var(--class-color, var(--accent)); }

.class-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px;
}
.class-name {
  font-weight: 600; font-size: 14px;
  display: flex; align-items: center; gap: 6px;
}
.class-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--class-color, var(--accent));
}
.class-count {
  font-size: 11px; color: var(--text2);
  background: var(--bg2);
  padding: 2px 7px; border-radius: 20px;
}
.class-actions { display: flex; gap: 4px; margin-top: 8px; }
.class-btn {
  background: none; border: none;
  font-size: 11px; color: var(--text2);
  cursor: pointer; padding: 3px 7px;
  border-radius: 5px;
  transition: all 0.15s;
}
.class-btn:hover { background: var(--bg2); color: var(--text); }
.class-btn.danger:hover { background: #ffeaea; color: var(--danger); }

.dataset-summary {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
}
.summary-item { text-align: center; }
.summary-item span {
  display: block; font-family: var(--font-display);
  font-size: 18px; font-weight: 700;
}
.summary-item label { font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }

/* MAIN PANEL */
.main-panel {
  padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
  overflow-y: auto;
}

/* RIGHT PANEL */
.right-panel {
  background: var(--surface2);
  backdrop-filter: blur(12px);
  border-left: 1px solid var(--border);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 14px;
  overflow-y: auto;
}

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}
.card-header {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-header h3 {
  font-family: var(--font-display);
  font-size: 15px; font-weight: 700;
}

/* DATA INPUTS */
.data-inputs {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 14px; margin-bottom: 14px;
}
.input-block {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.webcam-block {
  display: flex; flex-direction: column;
  background: #1a1814;
  position: relative;
}
#webcam {
  width: 100%; height: 200px;
  object-fit: cover; display: block;
  background: #1a1814;
}
.webcam-controls {
  display: flex; gap: 8px; padding: 10px;
  background: rgba(26,24,20,0.8);
}
.upload-block {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 8px; padding: 24px;
  background: var(--bg);
  cursor: pointer; transition: all 0.2s;
}
.upload-block:hover, .upload-block.drag-over {
  background: var(--bg2);
  border-color: var(--accent);
}
.drop-icon { font-size: 32px; }
.upload-block p { font-size: 13px; color: var(--text2); text-align: center; }
.or-text { font-size: 11px !important; }

/* PREVIEW GRID */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 6px; max-height: 200px; overflow-y: auto;
}
.preview-thumb {
  aspect-ratio: 1; border-radius: 6px;
  overflow: hidden; position: relative;
}
.preview-thumb img {
  width: 100%; height: 100%; object-fit: cover;
}
.preview-thumb .thumb-class {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: rgba(0,0,0,0.6);
  color: #fff; font-size: 9px; padding: 2px 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.preview-thumb .thumb-del {
  position: absolute; top: 2px; right: 2px;
  background: rgba(0,0,0,0.6); color: #fff;
  border: none; border-radius: 50%;
  width: 18px; height: 18px; font-size: 9px;
  cursor: pointer; display: none;
  align-items: center; justify-content: center;
}
.preview-thumb:hover .thumb-del { display: flex; }

/* CLASS SELECTOR */
.class-selector-wrap {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
}
.class-selector-wrap select {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 7px; padding: 5px 10px;
  font-family: var(--font); font-size: 13px;
  color: var(--text); cursor: pointer;
}

/* TRAINING */
.train-controls {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin-bottom: 14px;
}
.control-group { display: flex; flex-direction: column; gap: 5px; }
.control-group label { font-size: 12px; color: var(--text2); font-weight: 500; }
.control-group input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px;
  font-family: var(--font); font-size: 14px;
  color: var(--text); width: 100%;
  transition: border-color 0.2s;
}
.control-group input:focus { outline: none; border-color: var(--accent3); }

.train-actions { display: flex; gap: 10px; margin-bottom: 14px; }
.train-actions .btn-train { flex: 1; }
.train-actions .btn-ghost { width: auto; white-space: nowrap; }

.training-progress { margin-top: 4px; }
.progress-bar-wrap {
  height: 6px; background: var(--bg2);
  border-radius: 20px; overflow: hidden; margin-bottom: 6px;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent3), var(--accent));
  border-radius: 20px;
  width: 0%; transition: width 0.4s;
}
.progress-label { font-size: 12px; color: var(--text2); margin-bottom: 10px; }
.live-stats { display: flex; gap: 12px; margin-bottom: 12px; }
.stat-box {
  flex: 1; background: var(--bg);
  border-radius: 10px; padding: 10px;
  text-align: center;
}
.stat-box span {
  display: block; font-family: var(--font-display);
  font-size: 22px; font-weight: 700;
  color: var(--accent3);
}
.stat-box label { font-size: 11px; color: var(--text2); text-transform: uppercase; }

#training-chart {
  width: 100% !important; border-radius: 10px;
  background: var(--bg); border: 1px solid var(--border);
  display: block; margin-bottom: 10px;
}

.training-log {
  max-height: 120px; overflow-y: auto;
  background: #1a1814; border-radius: 8px;
  padding: 10px; font-size: 12px;
  font-family: monospace; color: #ccc;
}
.log-line { padding: 1px 0; }
.log-line.success { color: #4dff91; }
.log-line.warning { color: #ffcc4d; }

/* PREDICTION */
.pred-tab-bar { display: flex; gap: 4px; margin-bottom: 12px; }
.pred-tab {
  flex: 1; padding: 7px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; cursor: pointer;
  font-family: var(--font); font-size: 12px;
  transition: all 0.2s;
}
.pred-tab.active { background: var(--accent3); color: #fff; border-color: var(--accent3); }

.pred-tab-content { display: flex; flex-direction: column; gap: 8px; }
.pred-tab-content.hidden { display: none; }

#pred-webcam {
  width: 100%; height: 160px;
  object-fit: cover; border-radius: 8px;
  background: #1a1814; display: block;
}
.pred-image-wrap {
  width: 100%; height: 160px;
  border-radius: 8px; overflow: hidden;
  background: var(--bg); display: flex;
  align-items: center; justify-content: center;
}
#pred-preview { width: 100%; height: 100%; object-fit: cover; }
.pred-placeholder { font-size: 12px; color: var(--text2); }

.prediction-results {
  margin-top: 14px; text-align: center;
}
.pred-label {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 800;
  margin-bottom: 2px;
}
.pred-conf { font-size: 12px; color: var(--text2); margin-bottom: 12px; }

.confidence-bars { display: flex; flex-direction: column; gap: 6px; }
.conf-bar-row { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.conf-bar-label { width: 80px; text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 11px; }
.conf-bar-track {
  flex: 1; height: 8px;
  background: var(--bg2); border-radius: 20px; overflow: hidden;
}
.conf-bar-fill {
  height: 100%; border-radius: 20px;
  background: linear-gradient(90deg, var(--accent3), var(--accent));
  transition: width 0.4s;
}
.conf-bar-val { width: 36px; font-size: 11px; color: var(--text2); }

/* MODEL INFO */
.model-info { display: flex; flex-direction: column; gap: 8px; }
.info-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; padding: 4px 0;
  border-bottom: 1px solid var(--border);
}
.info-row:last-child { border: none; }
.info-row span { color: var(--text2); }
.info-row strong { font-weight: 600; }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(26,24,20,0.5);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px; width: 340px;
  box-shadow: var(--shadow-lg);
}
.modal h3 {
  font-family: var(--font-display);
  font-size: 18px; margin-bottom: 16px;
}
.modal input {
  width: 100%; background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px;
  font-family: var(--font); font-size: 14px;
  color: var(--text); margin-bottom: 12px;
}
.modal input:focus { outline: none; border-color: var(--accent); }
.modal-colors {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.color-dot {
  width: 24px; height: 24px; border-radius: 50%;
  cursor: pointer; border: 2px solid transparent;
  transition: all 0.15s;
}
.color-dot.selected { border-color: var(--text); transform: scale(1.2); }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* TOAST */
#toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 999; display: flex; flex-direction: column;
  gap: 8px; pointer-events: none;
}
.toast {
  background: var(--text);
  color: #fff; padding: 10px 18px;
  border-radius: 10px; font-size: 13px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  pointer-events: auto;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--accent2); color: #1a1814; }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg2); border-radius: 20px; }

/* RESPONSIVE */
@media (max-width: 1100px) {
  .app-layout { grid-template-columns: 240px 1fr; }
  .right-panel { display: none; }
}
@media (max-width: 768px) {
  .app-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .data-inputs { grid-template-columns: 1fr; }
  .train-controls { grid-template-columns: 1fr 1fr; }
}