:root {
  --bg: #F4F4F4;
  --surface: #FFFFFF;
  --surface2: #F9F9F9;
  --border: #E0E0E0;
  --text: #1A1A1A;
  --text-muted: #6B6B6B;
  --primary: #E21B1B;
  --primary-dim: #C41616;
  --primary-light: rgba(226,27,27,0.08);
  --success: #16A34A;
  --warning: #D97706;
  --danger: #DC2626;
  --accent: #E21B1B;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; }
body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

/* SML Home */
.sml-home { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; background: var(--bg); }
.sml-home video { width: 360px; border-radius: 10px; margin-bottom: 24px; }
.sml-home .start-btn { font-family: 'DM Sans'; font-size: 16px; font-weight: 700; padding: 14px 36px; border: none; border-radius: 10px; cursor: pointer; color: #fff; background: var(--primary); transition: all 0.2s; }
.sml-home .start-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(226,27,27,0.25); }
.app-wrapper { display: none; }
.app-wrapper.show { display: block; }
.header-logo { margin-left: auto; cursor: pointer; }
.header-logo img { height: 144px; width: auto; display: block; }

/* Header */
.app-header { background: var(--surface); border-bottom: 1px solid var(--border); padding: 16px 32px; display: flex; align-items: center; gap: 16px; box-shadow: var(--shadow); }
.app-header h1 { font-size: 18px; font-weight: 600; letter-spacing: -0.3px; color: var(--text); }
.app-header .badge { background: var(--primary); color: #fff; font-size: 11px; font-weight: 600; padding: 3px 10px; border-radius: 20px; text-transform: uppercase; letter-spacing: 0.5px; }

/* Stepper */
.stepper { display: flex; align-items: center; padding: 20px 32px; gap: 8px; background: var(--surface); border-bottom: 1px solid var(--border); overflow-x: auto; }
.step-item { display: flex; align-items: center; gap: 8px; white-space: nowrap; opacity: 0.35; transition: opacity 0.3s; }
.step-item.active { opacity: 1; }
.step-item.completed { opacity: 0.7; }
.step-num { width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: var(--text-muted); }
.step-item.active .step-num { border-color: var(--primary); background: var(--primary); color: #fff; }
.step-item.completed .step-num { border-color: var(--success); background: var(--success); color: #fff; }
.step-label { font-size: 13px; font-weight: 500; color: var(--text); }
.step-arrow { color: var(--border); font-size: 18px; }

/* Main Content */
.main-content { max-width: 960px; margin: 0 auto; padding: 24px 32px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 20px; box-shadow: var(--shadow); }
.card h2 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
input, select, textarea { font-family: 'DM Sans'; font-size: 14px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); width: 100%; transition: border-color 0.2s; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(226,27,27,0.1); }
select { cursor: pointer; background: var(--surface); }

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-bottom: 16px; }

/* Field rows */
.field-row { margin-bottom: 12px; }
.field-label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.field-value input, .field-value select { padding: 8px 10px; font-size: 13px; }

/* Buttons */
.btn-group { display: flex; gap: 12px; margin-top: 20px; }
.btn { font-family: 'DM Sans'; font-size: 14px; font-weight: 600; padding: 12px 24px; border: none; border-radius: 8px; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dim); box-shadow: 0 2px 8px rgba(226,27,27,0.2); }
.btn-primary:disabled { background: #ccc; color: #888; cursor: not-allowed; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803D; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--surface2); border-color: #ccc; }

/* Upload areas */
.drop-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 32px; text-align: center; cursor: pointer; transition: all 0.2s; background: var(--surface2); max-width: 400px; margin: 0 auto; }
.drop-zone:hover { border-color: var(--primary); background: var(--primary-light); }
.drop-zone.has-file { border-color: var(--success); border-style: solid; }
.drop-zone-label { font-size: 14px; color: var(--text-muted); }
.file-info { display: none; margin-top: 8px; font-size: 13px; color: var(--success); font-weight: 600; }

/* Thumb strip */
.thumb-strip { display: flex; gap: 8px; overflow-x: auto; margin-top: 12px; min-height: 10px; flex-wrap: wrap; justify-content: center; }
.thumb-item { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 6px 12px; font-size: 12px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.thumb-item .remove-thumb { cursor: pointer; color: var(--danger); font-weight: 700; }

/* Tables */
.qty-table { overflow-x: auto; margin: 12px 0; }
.qty-table table { width: 100%; border-collapse: collapse; font-size: 14px; }
.qty-table th, .qty-table td { padding: 8px 12px; border: 1px solid var(--border); text-align: center; }
.qty-table th { background: var(--surface2); font-weight: 600; font-size: 11px; text-transform: uppercase; color: var(--text-muted); }
.data-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.data-table th { background: var(--surface2); padding: 8px; border: 1px solid var(--border); font-weight: 600; position: sticky; top: 0; color: var(--text-muted); }
.data-table td { padding: 6px 8px; border: 1px solid var(--border); }

/* Tags & Chips */
.tag { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.tag-blue { background: var(--primary-light); color: var(--primary); }
.tag-green { background: rgba(22,163,74,0.1); color: var(--success); }
.tag-red { background: rgba(220,38,38,0.1); color: var(--danger); }

/* Refs grid */
.refs-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.ref-chip { background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; font-size: 13px; }
.ref-name { font-weight: 700; font-family: 'Space Mono', monospace; }
.ref-type { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* Composition */
.composition-row { display: grid; grid-template-columns: 1fr 80px 1fr 32px; gap: 8px; align-items: center; margin-bottom: 8px; }
.remove-btn { background: none; border: none; color: var(--danger); font-size: 18px; cursor: pointer; padding: 4px; }
.add-row-btn { background: var(--surface); border: 1px dashed var(--border); border-radius: 6px; padding: 8px; color: var(--text-muted); cursor: pointer; font-size: 12px; text-align: center; width: 100%; transition: all 0.2s; }
.add-row-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Warning banner */
.warn-banner { background: rgba(217,119,6,0.08); border: 1px solid rgba(217,119,6,0.25); border-radius: 8px; padding: 12px 16px; font-size: 13px; color: var(--warning); }
.info-banner { background: var(--primary-light); border: 1px solid rgba(226,27,27,0.2); border-radius: 8px; padding: 12px 16px; font-size: 13px; color: var(--primary); }

/* Section hidden */
.section-hidden { display: none !important; }

/* Loading overlay */
.loading-overlay { position: fixed; inset: 0; background: rgba(244,244,244,0.9); display: flex; flex-direction: column; align-items: center; justify-content: center; z-index: 999; }
.loading-spinner { width: 48px; height: 48px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
.loading-text { margin-top: 16px; font-size: 14px; color: var(--text-muted); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast { position: fixed; top: 50%; right: 24px; transform: translateY(-50%); padding: 12px 24px; border-radius: 8px; font-size: 13px; font-weight: 600; z-index: 9999; animation: toastIn 0.3s; box-shadow: var(--shadow-md); max-width: 320px; }
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }
.toast-warning { background: var(--warning); color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-50%) translateX(20px); } to { opacity: 1; transform: translateY(-50%) translateX(0); } }

/* Button status indicators */
.btn-status { display: inline-flex; align-items: center; gap: 8px; }
.status-icon { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; font-size: 14px; font-weight: 700; animation: fadeIn 0.3s; }
.status-icon.success { background: var(--success); color: #fff; }
.status-icon.error { background: var(--danger); color: #fff; }

/* Progress bar */
.progress-bar { width: 100%; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin: 16px 0; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 3px; transition: width 0.3s; width: 0%; }

/* CSV Preview scroll */
.csv-scroll { max-height: 400px; overflow: auto; border: 1px solid var(--border); border-radius: 8px; }

/* Version footer */
.version-bar { position: fixed; bottom: 0; right: 0; padding: 4px 12px; font-family: 'Space Mono', monospace; font-size: 10px; color: var(--text-muted); background: rgba(244,244,244,0.9); border-top-left-radius: 6px; z-index: 100; }

/* Login screen */
.login-screen { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; background: var(--bg); }
.login-screen video { width: 300px; border-radius: 10px; margin-bottom: 24px; }
.login-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; width: 100%; max-width: 360px; box-shadow: var(--shadow-md); }
.login-card h2 { font-size: 20px; font-weight: 700; margin-bottom: 4px; text-align: center; }
.login-card .subtitle { text-align: center; margin-bottom: 20px; color: var(--text-muted); font-size: 13px; }
.login-card .form-group { margin-bottom: 14px; }
.login-card .btn-primary { width: 100%; }
.login-error { color: var(--danger); font-size: 12px; text-align: center; margin-top: 10px; display: none; }
.login-success { color: #16a34a; font-size: 12px; text-align: center; margin-top: 10px; display: none; }
.forgot-link { display: block; text-align: center; margin-top: 12px; font-size: 12px; color: var(--text-muted); }
.login-domain { font-size: 11px; color: var(--text-muted); text-align: center; margin-top: 12px; }
.user-badge { font-size: 11px; color: var(--text-muted); margin-left: auto; margin-right: 8px; }
.logout-btn { font-size: 11px; color: var(--text-muted); cursor: pointer; text-decoration: underline; background: none; border: none; font-family: 'DM Sans'; }
.logout-btn:hover { color: var(--primary); }
.admin-btn { font-size: 11px; color: var(--primary); cursor: pointer; background: none; border: 1px solid var(--primary); border-radius: 4px; padding: 3px 10px; font-family: 'DM Sans'; font-weight: 600; }
.admin-btn:hover { background: var(--primary); color: #fff; }
.manual-link { font-size: 11px; color: var(--text-muted); text-decoration: none; font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif; padding: 3px 8px; border-radius: 4px; transition: color 0.15s, background 0.15s; }
.manual-link:hover { color: var(--primary); background: rgba(0,0,0,0.04); }
.admin-panel { padding: 24px 32px; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.admin-header h2 { font-size: 18px; font-weight: 700; }
.admin-section { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.admin-section h3 { font-size: 14px; font-weight: 600; margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); }
.admin-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: end; }
.admin-form .form-group { margin-bottom: 0; }
.admin-form .btn-primary { grid-column: 1 / -1; justify-self: start; }
.users-list { display: flex; flex-direction: column; gap: 8px; }
.user-row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.user-row .user-email { flex: 1; font-weight: 500; }
.user-row .user-role { font-size: 11px; font-weight: 600; text-transform: uppercase; padding: 2px 8px; border-radius: 4px; background: var(--bg); }
.user-row .user-role.admin { color: var(--primary); }
.user-row select { font-size: 12px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 4px; }
.user-row .btn-delete { font-size: 11px; color: var(--danger); cursor: pointer; background: none; border: none; font-family: 'DM Sans'; }

/* Ref dropdowns */
.ref-dropdown-group { margin-top: 12px; }
.ref-dropdown-group label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.ref-dropdown-row { display: flex; gap: 8px; margin-bottom: 8px; align-items: flex-end; }
.ref-dropdown-row select { flex: 1; }
.ref-dropdown-row .btn { padding: 10px 16px; height: 38px; }

/* Step 3 warnings banner — informational, not error/danger.
   Reserved SML accent (#E21B1B) for CTAs; warnings use neutral tones. */
.warnings-banner {
  margin-bottom: 1em;
  border-radius: 6px;
}
.warning-row {
  display: flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.6em 0.8em;
  border-radius: 4px;
  margin-bottom: 0.4em;
}
.warning-tech { background: #fef9c3; border-left: 3px solid #ca8a04; }
.warning-info { background: #dbeafe; border-left: 3px solid #2563eb; }
.warning-icon { font-size: 16px; flex-shrink: 0; }
.warning-msg { flex: 1; font-size: 14px; }
.warning-dismiss {
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 0 4px;
  color: inherit;
  opacity: 0.6;
}
.warning-dismiss:hover { opacity: 1; }

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .main-content { padding: 16px; }
  .drop-zone { max-width: 100%; }
}