:root {
  --primary: #1a237e;
  --primary-light: #3949ab;
  --primary-dark: #0d1642;
  --accent: #ff6f00;
  --bg: #f5f5f5;
  --card: #ffffff;
  --text: #212121;
  --text-secondary: #757575;
  --border: #e0e0e0;
  --success: #2e7d32;
  --error: #c62828;
  --warning: #f57f17;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.navbar {
  background: var(--primary-dark);
  color: white;
  padding: 12px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.navbar h1 { font-size: 20px; font-weight: 600; }
.navbar h1 span { color: var(--accent); }
.navbar nav { display: flex; gap: 16px; align-items: center; }
.navbar a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 14px; }
.navbar a:hover { color: white; }
.navbar .user-name { color: rgba(255,255,255,0.7); font-size: 13px; }

/* Auth pages */
.auth-wrapper {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}
.auth-card {
  background: white;
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.auth-card h2 { text-align: center; margin-bottom: 8px; color: var(--primary-dark); }
.auth-card .subtitle { text-align: center; color: var(--text-secondary); margin-bottom: 24px; font-size: 14px; }
.auth-card .logo { text-align: center; font-size: 28px; font-weight: 700; margin-bottom: 24px; }
.auth-card .logo span { color: var(--accent); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 4px; color: var(--text-secondary); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(57,73,171,0.1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  gap: 8px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-light); }
.btn-accent { background: var(--accent); color: white; }
.btn-accent:hover { background: #e65100; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #b71c1c; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: #ffebee; color: var(--error); border: 1px solid #ef9a9a; }
.alert-success { background: #e8f5e9; color: var(--success); border: 1px solid #a5d6a7; }

.link { color: var(--primary-light); text-decoration: none; }
.link:hover { text-decoration: underline; }
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }

/* Cards */
.card {
  background: var(--card);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  border: 1px solid var(--border);
}

/* Dashboard */
.page-header { display: flex; justify-content: space-between; align-items: center; margin: 24px 0; }
.page-header h2 { font-size: 24px; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }

.project-card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s;
}
.project-card:hover { border-color: var(--primary-light); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.project-card h3 { font-size: 16px; margin-bottom: 4px; }
.project-card .client { color: var(--text-secondary); font-size: 14px; }
.project-card .meta { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; }
.project-card .date { font-size: 12px; color: var(--text-secondary); }

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.status-DRAFT { background: #e0e0e0; color: #616161; }
.status-UPLOADING { background: #fff3e0; color: var(--warning); }
.status-PROCESSING { background: #e3f2fd; color: #1565c0; }
.status-COMPLETED { background: #e8f5e9; color: var(--success); }
.status-ERROR { background: #ffebee; color: var(--error); }

/* Project detail */
.project-detail { margin-top: 24px; }
.section { margin-bottom: 24px; }
.section h3 { font-size: 16px; margin-bottom: 12px; color: var(--primary-dark); }

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #fafafa;
}
.upload-zone:hover { border-color: var(--primary-light); background: #f0f0ff; }
.upload-zone.dragover { border-color: var(--accent); background: #fff8e1; }
.upload-zone p { color: var(--text-secondary); font-size: 14px; margin-top: 8px; }
.upload-zone .icon { font-size: 36px; color: var(--text-secondary); }

/* Upload Progress */
.upload-progress {
  padding: 8px 0;
}
.upload-progress-bar-outer {
  width: 100%; height: 6px; background: #e0e0e0; border-radius: 3px; overflow: hidden;
}
.upload-progress-bar-inner {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
  transition: width 0.2s ease;
}
.upload-progress-text {
  font-size: 12px; color: var(--text-secondary); margin-top: 6px; text-align: center;
}

.file-list { margin-top: 12px; }
.file-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; background: #fafafa; border-radius: 6px; margin-bottom: 4px;
  font-size: 13px;
}

/* Progress */
.progress-container { margin-top: 16px; }
.progress-bar-outer {
  width: 100%;
  height: 8px;
  background: #e0e0e0;
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 0.5s ease;
}
.progress-text { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }

/* Settings */
.settings-form { max-width: 600px; }
.logo-preview { width: 120px; height: 60px; object-fit: contain; border: 1px solid var(--border); border-radius: 8px; margin-top: 8px; }

/* Modal */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.modal { background: white; border-radius: 12px; padding: 32px; width: 100%; max-width: 480px; }
.modal h3 { margin-bottom: 16px; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 24px; }

.hidden { display: none !important; }

/* Mode Toggle */
.mode-toggle {
  display: flex; gap: 0; border-radius: 8px; overflow: hidden; border: 1px solid var(--border);
}
.mode-btn {
  flex: 1; padding: 8px 16px; border: none; background: var(--bg); cursor: pointer;
  font-size: 13px; font-weight: 500; color: var(--text-secondary); transition: all 0.2s;
}
.mode-btn.active {
  background: var(--primary); color: white;
}
.mode-btn:hover:not(.active) { background: var(--border); }

.mode-badge {
  display: inline-block; padding: 4px 12px; border-radius: 4px;
  background: var(--accent); color: white; font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
}

/* Room Cards */
.room-cards-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px; margin-top: 16px;
}
.room-card {
  background: white; border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; transition: box-shadow 0.2s;
}
.room-card:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.room-card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.room-name-input {
  flex: 1; font-size: 15px; font-weight: 600; border: 1px solid transparent;
  padding: 4px 8px; border-radius: 4px; background: transparent;
}
.room-name-input:hover, .room-name-input:focus {
  border-color: var(--primary-light); background: white; outline: none;
}
.room-card-dims {
  display: flex; gap: 8px; margin-bottom: 8px;
}
.dim-field { flex: 1; }
.dim-field label {
  display: block; font-size: 10px; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 2px;
}
.dim-field input {
  width: 100%; padding: 4px 6px; font-size: 13px; border: 1px solid var(--border);
  border-radius: 4px;
}
.dim-field input:focus { border-color: var(--primary-light); outline: none; }
.room-card-renders {
  padding-top: 8px; border-top: 1px solid var(--border);
}
.room-card-reasoning {
  margin-top: 8px; font-size: 11px; color: var(--text-secondary);
  font-style: italic; line-height: 1.4;
}
.confidence-badge {
  font-size: 10px; padding: 2px 8px; border-radius: 10px; font-weight: 600;
  text-transform: uppercase;
}
.confidence-high { background: #e8f5e9; color: var(--success); }
.confidence-medium { background: #fff8e1; color: var(--warning); }
.confidence-low { background: #fce4ec; color: var(--error); }