/* ==========================================================================
   LAMSNAP DESIGN SYSTEM & CORE STYLES
   Silicon Valley Dark Aesthetic, Glassmorphism, Micro-Animations & Responsive Studio
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-dark: #0a0d12;
  --bg-card: rgba(22, 27, 34, 0.75);
  --bg-card-hover: rgba(33, 38, 45, 0.85);
  --bg-input: rgba(13, 17, 23, 0.8);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(56, 189, 248, 0.3);

  /* Primary Accents */
  --accent-blue: #38bdf8;
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #8b5cf6 100%);
  --accent-glow: 0 0 20px rgba(56, 189, 248, 0.4);

  /* Text Colors */
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Shadows & Glassmorphism */
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
  --glass-backdrop: blur(16px);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Touch Target */
  --touch-min: 48px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  overflow-x: hidden;
  line-height: 1.5;
}

/* ==========================================================================
   APP HEADER & NAVIGATION
   ========================================================================== */

.app-header {
  height: 64px;
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--accent-glow);
}

.badge-mode {
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-pwa-install {
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  box-shadow: var(--accent-glow);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-pwa-install:active {
  transform: scale(0.96);
}

/* ==========================================================================
   STUDIO LAYOUT CONTAINER (RESPONSIVE 2-COLUMN)
   ========================================================================== */

.studio-container {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - 64px);
  gap: 1.5rem;
  padding: 1.5rem;
  max-width: 1600px;
  margin: 0 auto;
}

@media (min-width: 1025px) {
  .studio-container {
    grid-template-columns: 1fr 420px;
  }
}

@media (min-width: 1280px) {
  .studio-container {
    grid-template-columns: 1fr 480px;
  }
}

/* ==========================================================================
   LEFT COLUMN: VISUALIZER CANVAS STUDIO
   ========================================================================== */

.visualizer-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  position: relative;
  min-height: 520px;
}

.visualizer-toolbar {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(13, 17, 23, 0.4);
}

.visualizer-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.tool-btn:hover, .tool-btn.active {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.canvas-viewport {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  min-height: 400px;
  overflow: hidden;
}

.placeholder-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
  cursor: pointer;
  width: 100%;
  height: 100%;
  border: 2px dashed var(--border-color);
  margin: 1.5rem;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.placeholder-dropzone:hover {
  border-color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.05);
}

.dropzone-icon {
  width: 64px;
  height: 64px;
  background: rgba(56, 189, 248, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--accent-blue);
}

.canvas-element {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: none;
}

/* Before / After Split Slider */
.slider-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
}

.slider-before-image, .slider-after-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent-blue);
  box-shadow: 0 0 10px var(--accent-blue);
  cursor: ew-resize;
  z-index: 10;
}

.slider-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: bold;
  font-size: 0.9rem;
  box-shadow: 0 0 12px rgba(0,0,0,0.8);
}

/* ==========================================================================
   RIGHT COLUMN: CONTROL STATION (UPLOADER, CONCEPTS & CHAT)
   ========================================================================== */

.control-station {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Section Card */
.panel-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--glass-shadow);
}

.panel-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Photo Upload Trays */
.upload-trays {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0.75rem;
}

.upload-slot {
  aspect-ratio: 1 / 1;
  background: var(--bg-input);
  border: 1.5px dashed var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.2s ease;
}

.upload-slot:hover {
  border-color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.08);
}

.upload-slot input[type="file"] {
  display: none;
}

.slot-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.25rem;
  text-align: center;
}

.slot-preview {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

/* AI Concept Cards */
.concept-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.concept-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  cursor: pointer;
  transition: all 0.25 ease;
  position: relative;
}

.concept-card:hover, .concept-card.active {
  border-color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.12);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.concept-card.active::after {
  content: '✓';
  position: absolute;
  top: 8px;
  right: 10px;
  font-weight: bold;
  color: var(--accent-blue);
  font-size: 0.85rem;
}

.concept-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.concept-tagline {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.concept-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* Conversational Chat Section */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 240px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chat-history {
  flex: 1;
  padding: 0.75rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.chat-msg {
  max-width: 85%;
  padding: 0.5rem 0.8rem;
  border-radius: 12px;
  font-size: 0.8rem;
  line-height: 1.4;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: rgba(33, 38, 45, 0.9);
  color: var(--text-primary);
  border-bottom-left-radius: 2px;
  border: 1px solid var(--border-color);
}

.chat-msg.user {
  align-self: flex-end;
  background: var(--accent-gradient);
  color: #fff;
  border-bottom-right-radius: 2px;
}

.chat-input-bar {
  display: flex;
  padding: 0.5rem;
  background: rgba(13, 17, 23, 0.9);
  border-top: 1px solid var(--border-color);
  gap: 0.5rem;
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  padding: 0.4rem 0.6rem;
}

.chat-send-btn {
  background: var(--accent-gradient);
  border: none;
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.chat-send-btn:active {
  transform: scale(0.92);
}

/* Prompt Chips */
.prompt-chips {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  margin-top: 0.5rem;
}

.chip {
  white-space: nowrap;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.7rem;
  padding: 0.3rem 0.65rem;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.chip:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Render Action Button */
.btn-primary-action {
  width: 100%;
  padding: 0.85rem;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-primary-action:active {
  transform: scale(0.98);
}