/* Modern Professional Dashboard Styling for SPINE Studio */

:root {
  --bg-app: #f4f6f8;
  --bg-sidebar: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: #334155;
  --accent: #3b82f6; /* Modern Blue */
  --accent-hover: #2563eb;
  --muted: #64748b;
  --panel-text: #0f1720;
  --about-heading: #0b3a57;
  --about-link: #0366d6;
  --about-link-hover: #023e8a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 8px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  display: flex;
}

/* --- Sidebar --- */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255,255,255,0.05);
  flex-shrink: 0;
  transition: width 0.3s ease;
}

.sidebar.collapsed {
  width: 70px;
}

.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .footer-info {
  display: none;
}

.sidebar.collapsed .brand {
  justify-content: center;
  padding: 20px 10px;
}

.sidebar.collapsed .brand-logo {
  width: 40px !important;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: 12px;
}

.sidebar.collapsed .nav-icon {
  margin-right: 0;
}

.sidebar.collapsed .sidebar-toggle {
  margin: 10px;
}

.brand {
  padding: 24px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.brand-logo {
  width: 30%;
}

.brand-text {
  color: white;
}

.sidebar-toggle {
  position: relative;
  width: calc(100% - 40px);
  height: 40px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin: 10px 20px;
  transition: all 0.3s;
  box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
}

.sidebar-toggle:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.4);
}

.sidebar.collapsed .sidebar-toggle {
  width: 50px;
  margin: 10px auto;
}

.sidebar.collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

.nav-menu {
  padding: 20px 10px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  margin-bottom: 4px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 15px;
  font-weight: 500;
}

.nav-item:hover {
  background-color: var(--sidebar-hover);
  color: var(--sidebar-text-active);
}

.nav-item.active {
  background-color: var(--accent);
  color: #fff;
}

.nav-icon { 
  margin-right: 12px; 
  width: 20px; 
  text-align: center; 
}

.nav-text {
  flex: 1;
}

.footer-info {
  padding: 20px;
  font-size: 12px;
  text-align: center;
  color: var(--sidebar-text);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

.top-bar {
  height: 64px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-title h2 { font-size: 18px; font-weight: 600; color: var(--text-main); }
.status-badge { 
  font-size: 12px; 
  padding: 4px 10px; 
  background: #ecfccb; 
  color: #3f6212; 
  border-radius: 20px; 
  font-weight: 600; 
}

/* --- Page Views --- */
.page-view {
  display: none;
  padding: 30px;
  overflow-y: auto;
  height: calc(100vh - 64px);
  animation: fadeIn 0.3s ease;
}

.page-view.active-view {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Inference Dashboard --- */
.dashboard-grid {
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  gap: 20px;
  height: 100%;
}

/* smoothly animate column changes when chat panel hides/shows */
.dashboard-grid {
  transition: grid-template-columns 0.35s ease;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.card-header {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Tab Switcher inside Inference */
.model-tabs {
  display: flex;
  background: #f1f5f9;
  padding: 4px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.model-tab {
  flex: 1;
  text-align: center;
  padding: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-muted);
  transition: all 0.2s;
}

.model-tab.active-tab {
  background: #fff;
  color: var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: #fafafa;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: #eff6ff;
}

.upload-icon {
  font-size: 32px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.upload-text {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.btn-primary {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  text-align: center;
}
.btn-primary:hover { background: var(--accent-hover); }

/* Result Area */
.result-viewer {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.result-canvas {
  flex: 1;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.result-canvas img {
  max-width: 100%;
  max-height: 100%;
  height: 100%;
  object-fit: contain;
}

/* Chat Panel */
.chat-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* allow chat panel to fade and be removed from layout via grid column resizing */
.chat-panel {
  min-width: 0;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  opacity: 1;
}
.chat-panel.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Chat box */
.chat-box {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  position: relative;
  overflow: hidden;
}
.chat-log {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
  background: #f8fafc;
  border-bottom: 1px solid var(--border-color);
  max-height: 100%;
}
.chat-msg {
  margin-bottom: 10px;
  font-size: 13px;
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
}
.chat-msg .bubble {
  max-width: 80%;
  padding: 10px 12px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}
.chat-msg.ai {
  justify-content: flex-start;
}
.chat-msg.ai .bubble {
  background: #e0f2fe;
  color: #0b7bff;
  border: 1px solid #bae6fd;
}
.chat-msg.you {
  justify-content: flex-end;
}
.chat-msg.you .bubble {
  background: #eef2ff;
  color: #312e81;
  border: 1px solid #c7d2fe;
}
.chat-input {
  display: flex;
  gap: 8px;
  padding: 10px;
}
.chat-input textarea {
  flex: 1;
  resize: none;
  height: 64px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  outline: none;
}
.chat-disabled {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0f172a;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius);
  z-index: 2;
  text-align: center;
  padding: 0 12px;
}
.chat-input button {
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.chat-input button:disabled { background: #cbd5e1; cursor: not-allowed; }

.empty-state {
  color: rgba(255,255,255,0.5);
  text-align: center;
}

/* About Page Styles */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}
.about-section {
  background: #fff;
  padding: 28px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  margin-bottom: 24px;
  color: var(--panel-text);
  line-height: 1.6;
}
.about-section h3 { margin-bottom: 12px; color: var(--about-heading); font-size:18px; }
.about-section p { color: var(--muted); margin-bottom: 14px; line-height: 1.7; font-size:14px; }
.metric-row { display: flex; gap: 30px; margin-top: 20px; padding-top: 20px; border-top: 1px solid #f0f0f0; }
.metric-item strong { display: block; font-size: 24px; color: var(--accent); }
.metric-item span { font-size: 13px; color: var(--text-muted); }

/* Tech details block used in About */
.tech-details { margin-top: 14px; color: var(--panel-text); font-size:14px; }
.tech-details h4 { margin: 6px 0 8px; font-size:15px; color: var(--muted); font-weight:600; }
.tech-details h5 { margin: 8px 0 6px; font-size:13px; color: var(--about-heading); font-weight:600; }
.tech-details ul { margin: 6px 0 12px 18px; padding: 0; }
.tech-details li { margin-bottom:6px; color: var(--muted); font-size:13px; }
.tech-details a { color: var(--about-link); text-decoration: none; }
.tech-details a:hover { color: var(--about-link-hover); text-decoration: underline; }

/* Make inline examples (script references) visually distinct */
.tech-details strong { color: var(--text-main); }

/* Model diagram styles */
.model-diagram { margin-top:12px; height:180px; background: linear-gradient(180deg, rgba(255,255,255,0.6), rgba(250,250,250,0.6)); border:1px solid var(--border-color); border-radius:8px; padding:8px; }
.model-diagram svg { width:100%; height:100%; }
.diagram-node { fill:#eef6ff; stroke:var(--accent); stroke-width:1.2; }
.diagram-text { font-size:12px; fill:var(--about-heading); }
.diagram-muted { font-size:11px; fill:var(--muted); }

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  backdrop-filter: blur(2px);
  display: none;
}
.spinner {
  width: 40px; height: 40px;
  border: 4px solid #e2e8f0;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Markdown Styles for AI Chat */
.chat-msg.ai .bubble p { margin: 0 0 8px 0; color: #0c4a6e; }
.chat-msg.ai .bubble p:last-child { margin-bottom: 0; }
.chat-msg.ai .bubble h1, .chat-msg.ai .bubble h2, .chat-msg.ai .bubble h3 { 
  margin: 12px 0 8px 0; 
  color: #0c4a6e; 
  font-size: 1em; 
  font-weight: 600; 
}
.chat-msg.ai .bubble h1:first-child, .chat-msg.ai .bubble h2:first-child, .chat-msg.ai .bubble h3:first-child { margin-top: 0; }
.chat-msg.ai .bubble ul, .chat-msg.ai .bubble ol { 
  margin: 8px 0; 
  padding-left: 20px; 
}
.chat-msg.ai .bubble li { margin: 4px 0; }
.chat-msg.ai .bubble code { 
  background: #bae6fd; 
  padding: 2px 4px; 
  border-radius: 3px; 
  font-size: 0.9em; 
}
.chat-msg.ai .bubble pre { 
  background: #f0f9ff; 
  padding: 8px; 
  border-radius: 4px; 
  overflow-x: auto; 
  margin: 8px 0; 
}
.chat-msg.ai .bubble pre code { 
  background: none; 
  padding: 0; 
}
.chat-msg.ai .bubble strong { font-weight: 600; color: #075985; }
.chat-msg.ai .bubble em { font-style: italic; }
.chat-msg.ai .bubble blockquote { 
  border-left: 3px solid #0ea5e9; 
  padding-left: 12px; 
  margin: 8px 0; 
  color: #0c4a6e; 
}

/* Mobile */
@media (max-width: 768px) {
  body { flex-direction: column; overflow: auto; }
  .sidebar { width: 100%; height: auto; flex-direction: row; overflow-x: auto; align-items: center; padding: 0 10px; }
  .nav-menu { display: flex; gap: 10px; padding: 10px 0; }
  .dashboard-grid { grid-template-columns: 1fr; display: block; }
  .result-canvas { height: 400px; margin-top: 20px; }
  .main-content { overflow: visible; height: auto; }
  .page-view { height: auto; }
  .sidebar-toggle { display: none; }
}