:root {
  --bg: #0f172a;
  --sidebar-bg: rgba(15, 23, 42, 0.95);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --glass: rgba(30, 41, 59, 0.75);
  --glass-border: rgba(255,255,255,0.1);
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

.bg-blobs { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); animation: float 20s infinite ease-in-out; }
.blob-1 { top:-10%; left:-5%; width:500px; height:500px; background:rgba(59,130,246,0.35); }
.blob-2 { bottom:-20%; right:-5%; width:600px; height:600px; background:rgba(16,185,129,0.25); animation-delay:-7s; }
.blob-3 { top:40%; left:45%; width:400px; height:400px; background:rgba(139,92,246,0.25); animation-delay:-14s; }
@keyframes float {
  0%,100%{transform:translate(0,0) scale(1);}
  33%{transform:translate(30px,-40px) scale(1.1);}
  66%{transform:translate(-20px,20px) scale(0.9);}
}

/* Layout */
.app-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 280px;
  min-height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
  backdrop-filter: blur(20px);
}

.sidebar-logo {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--glass-border);
}

.sidebar-logo h2 {
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(to right, #60a5fa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.4;
}

.user-summary {
  padding: 16px 20px;
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.82rem;
  color: var(--text-secondary);
  min-height: 60px;
}
.user-summary.filled { color: var(--text-primary); }
.user-summary strong { color: var(--accent-hover); display: block; margin-bottom: 4px; font-size: 0.9rem; }

.step-nav { padding: 16px 12px; flex: 1; }
.step-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 4px;
  transition: all 0.2s;
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
}
.step-nav-item:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }
.step-nav-item.active { background: rgba(59,130,246,0.2); color: var(--text-primary); border: 1px solid rgba(59,130,246,0.3); }
.step-nav-item .step-num {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--glass); border: 1.5px solid var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 700; flex-shrink: 0;
}
.step-nav-item.active .step-num { background: var(--accent); border-color: var(--accent); }
.step-nav-item.done .step-num { background: var(--success); border-color: var(--success); color: white; }
.step-nav-item.done .step-num::before { content: '✓'; }
.step-nav-item .step-label { line-height: 1.3; }
.step-nav-item .doc-count {
  margin-left: auto; font-size: 0.75rem;
  background: rgba(16,185,129,0.2); color: #34d399;
  padding: 2px 7px; border-radius: 20px;
}

/* Progress bar */
.progress-bar-wrap {
  padding: 16px 20px 8px;
  border-top: 1px solid var(--glass-border);
}
.progress-label { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 8px; display: flex; justify-content: space-between; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(to right, var(--accent), var(--success)); border-radius: 3px; transition: width 0.4s ease; }

/* Main */
.main { flex: 1; padding: 40px; overflow-y: auto; max-width: 900px; }

.step-page { display: none; animation: fadeUp 0.4s ease; }
.step-page.active { display: block; }
@keyframes fadeUp { from{opacity:0;transform:translateY(16px);} to{opacity:1;transform:translateY(0);} }

/* Step Header */
.step-header { margin-bottom: 32px; }
.step-badge {
  display: inline-block; background: rgba(59,130,246,0.2);
  color: var(--accent-hover); padding: 5px 14px; border-radius: 20px;
  font-size: 0.85rem; font-weight: 600; margin-bottom: 12px;
}
.step-header h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 10px; }
.step-header p { color: var(--text-secondary); line-height: 1.6; font-size: 1rem; }

/* Basic Info Form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.form-group label span.req { color: var(--danger); margin-left: 3px; }

input, select, textarea {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
input::placeholder, textarea::placeholder { color: rgba(148,163,184,0.5); }
select option { background: #1e293b; }
textarea { resize: vertical; min-height: 100px; }

/* Glass Panel */
.glass-panel {
  background: var(--glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

/* Document Card */
.doc-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  margin-bottom: 20px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.doc-card.completed { border-color: rgba(16,185,129,0.4); }
.doc-card.has-content { border-color: rgba(59,130,246,0.3); }

.doc-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--glass-border);
  gap: 12px;
  flex-wrap: wrap;
}
.doc-card-header h3 { font-size: 1rem; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.doc-card-header h3 .icon { font-size: 1.2rem; }

.doc-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Buttons */
.btn {
  padding: 9px 18px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover:not(:disabled) { background: #2563eb; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.35); }
.btn-ai { background: linear-gradient(135deg, #8b5cf6, #3b82f6); color: white; }
.btn-ai:hover:not(:disabled) { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(139,92,246,0.4); }
.btn-upload { background: rgba(255,255,255,0.08); color: var(--text-primary); border: 1px solid var(--glass-border); }
.btn-upload:hover:not(:disabled) { background: rgba(255,255,255,0.12); }
.btn-sketch { background: linear-gradient(135deg, #f59e0b, #ef4444); color: white; }
.btn-sketch:hover:not(:disabled) { opacity: 0.9; transform: translateY(-1px); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid rgba(239,68,68,0.3); padding: 5px 10px; font-size: 0.8rem; }
.btn-danger:hover { background: rgba(239,68,68,0.1); }
.btn-outline { background: transparent; color: var(--text-secondary); border: 1px solid var(--glass-border); }
.btn-outline:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }
.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: 12px; }

/* Doc Content Area */
.doc-card-body { padding: 20px; }

.generated-content-wrap { position: relative; }
.generated-content {
  width: 100%;
  min-height: 200px;
  max-height: 400px;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 16px;
  color: var(--text-primary);
  font-size: 0.88rem;
  line-height: 1.7;
  resize: vertical;
  font-family: 'Pretendard', monospace;
}
.content-actions {
  display: flex; gap: 8px; margin-top: 10px; justify-content: flex-end;
}

/* File Upload Area */
.upload-zone {
  border: 2px dashed rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 14px;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(59,130,246,0.05);
}
.upload-zone .upload-icon { font-size: 2rem; margin-bottom: 8px; opacity: 0.6; }
.upload-zone p { color: var(--text-secondary); font-size: 0.88rem; }
.upload-zone small { color: rgba(148,163,184,0.5); font-size: 0.8rem; }

.uploaded-files { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.file-item {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 10px 14px; font-size: 0.88rem;
}
.file-item .file-icon { font-size: 1.2rem; }
.file-item .file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .file-size { color: var(--text-secondary); font-size: 0.8rem; white-space: nowrap; }

/* Sketch Section */
.sketch-section { margin-top: 20px; }
.sketch-preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 16px; }
.sketch-original, .sketch-result {
  background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border);
  border-radius: 12px; padding: 16px;
}
.sketch-original h4, .sketch-result h4 {
  font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 12px; text-align: center;
}
.sketch-original img { width: 100%; border-radius: 8px; }
.svg-container { width: 100%; overflow-x: auto; }
.svg-container svg { max-width: 100%; height: auto; }

/* Floor Plan Analysis */
.floor-plan-analysis {
  margin-top: 16px;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 16px;
  font-size: 0.88rem;
  line-height: 1.7;
  white-space: pre-wrap;
  max-height: 360px;
  overflow-y: auto;
}

/* Loading */
.loading-overlay {
  display: none; align-items: center; justify-content: center;
  padding: 32px; flex-direction: column; gap: 14px;
}
.loading-overlay.show { display: flex; }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay p { color: var(--text-secondary); font-size: 0.9rem; }

/* Status badge */
.status-badge {
  font-size: 0.75rem; padding: 3px 10px; border-radius: 20px; font-weight: 600;
}
.status-badge.pending { background: rgba(148,163,184,0.15); color: var(--text-secondary); }
.status-badge.ai-generated { background: rgba(139,92,246,0.2); color: #a78bfa; }
.status-badge.uploaded { background: rgba(59,130,246,0.2); color: var(--accent-hover); }
.status-badge.completed { background: rgba(16,185,129,0.2); color: #34d399; }

/* Navigation Buttons */
.nav-buttons {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--glass-border);
}
.step-counter { color: var(--text-secondary); font-size: 0.88rem; }

/* Alert / Toast */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--glass); border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px); border-radius: 12px;
  padding: 14px 20px; font-size: 0.9rem;
  display: flex; align-items: center; gap: 10px;
  box-shadow: var(--shadow); z-index: 9999;
  transform: translateY(20px); opacity: 0;
  transition: all 0.3s; pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: rgba(16,185,129,0.4); }
.toast.error { border-color: rgba(239,68,68,0.4); }

/* Divider */
.section-divider { height: 1px; background: var(--glass-border); margin: 24px 0; }

/* Tip box */
.tip-box {
  background: rgba(59,130,246,0.08); border: 1px solid rgba(59,130,246,0.2);
  border-radius: 10px; padding: 14px 16px; font-size: 0.88rem;
  color: var(--text-secondary); margin-bottom: 20px; line-height: 1.6;
}
.tip-box strong { color: var(--accent-hover); }

/* Reference docs section */
.ref-docs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.ref-doc-chip {
  background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border);
  border-radius: 20px; padding: 6px 14px; font-size: 0.82rem; color: var(--text-secondary);
  display: flex; align-items: center; gap: 6px;
}
.ref-doc-chip.done { border-color: rgba(16,185,129,0.3); color: #34d399; background: rgba(16,185,129,0.08); }

/* Responsive */
@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; }
  .main { padding: 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .sketch-preview-grid { grid-template-columns: 1fr; }
}