:root {
  --bg-color: #0F172A; /* Slate 900 */
  --bg-surface: rgba(30, 41, 59, 0.7); /* Slate 800 */
  --bg-surface-hover: rgba(51, 65, 85, 0.8);
  --border-color: rgba(99, 102, 241, 0.2);
  --border-highlight: rgba(99, 102, 241, 0.5);
  
  --primary: #6366F1;       /* Indigo 500 */
  --primary-hover: #4F46E5;
  --secondary: #94A3B8;     /* Slate 400 */
  --accent: #22D3EE;        /* Cyan 400 */
  
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 15px rgba(99, 102, 241, 0.15);
  
  --transition: all 0.25s ease;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  height: 100vh;
  display: flex;
  overflow: hidden;
  background-image: 
    radial-gradient(circle at top right, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at bottom left, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
}

.hidden { display: none !important; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.text-sm { font-size: 0.85rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.w-full { width: 100%; }
.flex-1 { flex: 1; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-align { display: flex; align-items: center; gap: 0.5rem; }
.scrollable { overflow-y: auto; }
.d-block { display: block; }

/* Glassmorphism */
.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

/* Layout */
.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0;
  z-index: 10;
}

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo h1 { font-size: 1.25rem; font-weight: 700; background: linear-gradient(to right, var(--primary), var(--accent)); -webkit-background-clip: text; color: transparent;}

.header-actions { display: flex; gap: 1rem; }

.main-content {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  min-height: 0;
}

/* Form Styles */
.left-panel {
  padding: 2rem;
}

.form-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.form-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group label { font-size: 0.9rem; color: var(--text-muted); font-weight: 500;}

.form-control {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2); }

.color-picker-wrap {
    display: flex; align-items: center; gap: 0.5rem;
}
.color-picker-wrap input[type="color"] {
    width: 40px; height: 40px; border: none; border-radius: var(--radius-sm); cursor: pointer;
    background: transparent; padding: 0;
}
.color-picker-wrap input[type="text"] { flex: 1; }

/* File Upload */
.file-upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(15, 23, 42, 0.3);
}
.file-upload-zone:hover, .file-upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.icon-previews {
    display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center;
}
.icon-preview-box {
    display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
    background: rgba(0,0,0,0.2); padding: 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border-color);
}
.icon-preview-box canvas {
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-glow);
    max-width: 120px;
    max-height: 120px;
    width: auto; height: auto;
}

/* Right Panel */
.right-panel {
    display: flex; flex-direction: column; gap: 1.5rem;
    min-height: 0;
}
.panel-section { padding: 1.5rem; display: flex; flex-direction: column; }
.preview-wrapper { overflow: hidden; }
.preview-actions { display: flex; gap: 0.5rem; }

pre {
    background: #0B1120;
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.05);
    overflow: auto;
    flex: 1;
}
code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #A5B4FC; /* Indigo 300 for JSON text */
    line-height: 1.5;
}

/* Checklist */
.checklist { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.check-item { display: flex; align-items: flex-start; gap: 0.75rem; color: var(--text-muted); font-size: 0.95rem; }
.check-item.checked { color: var(--text-main); }
.check-icon {
    width: 24px; height: 24px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.05); color: transparent; flex-shrink: 0;
    transition: var(--transition);
}
.check-item.checked .check-icon {
    background: var(--success); color: white;
}
.check-icon.warning { color: var(--warning); background: transparent; border: 1px solid var(--warning);}

/* Buttons */
button { font-family: var(--font-sans); cursor: pointer; transition: var(--transition); display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; border-radius: var(--radius-sm); }
.icon-btn { background: rgba(255,255,255,0.05); border: 1px solid var(--border-color); color: var(--text-muted); padding: 0.5rem; }
.icon-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-main); }
.btn-primary { background: var(--primary); color: white; border: none; padding: 0.6rem 1.2rem; font-weight: 600;}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.btn-outline { background: transparent; border: 1px solid var(--border-highlight); color: var(--text-main); padding: 0.6rem 1.2rem; font-weight: 500;}
.btn-outline:hover { background: rgba(99, 102, 241, 0.1); border-color: var(--primary); color: var(--text-main); }

/* Toast */
.toast {
    position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%);
    background: var(--text-main); color: var(--bg-color);
    padding: 0.75rem 1.5rem; border-radius: 99px; font-weight: 600;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.5); z-index: 1000;
    animation: slideUp 0.3s forwards;
}
@keyframes slideUp { from { opacity: 0; transform: translate(-50%, 20px); } to { opacity: 1; transform: translate(-50%, 0); } }

@media (max-width: 1024px) {
    .main-content { grid-template-columns: 1fr; overflow-y: auto; }
    .left-panel { overflow: visible; height: auto; }
    .right-panel { height: auto; min-height: 800px;}
}
@media (max-width: 600px) {
    .form-grid { grid-template-columns: 1fr; }
}