:root {
  --bg: #0a0e1a;
  --card: #111827;
  --card2: #1a2235;
  --border: #1f2937;
  --border2: #2d3a52;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --font: system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; line-height: 1.6; }

/* Nav */
nav { background: var(--card); border-bottom: 1px solid var(--border); padding: 0 2rem; height: 56px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 100; }
.nav-brand { font-weight: 700; font-size: 1.1rem; letter-spacing: 0.08em; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }
.nav-links a:hover { color: var(--text); }
.btn-new { background: var(--accent); color: white !important; padding: 0.35rem 0.9rem; border-radius: 6px; font-size: 0.85rem !important; }
.btn-new:hover { background: var(--accent-hover) !important; }
.nav-user { color: var(--text); font-size: 0.85rem; }
.nav-logout { color: var(--muted) !important; font-size: 0.82rem !important; }

/* Main */
main { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

/* Buttons */
.btn-primary { background: var(--accent); color: white; border: none; padding: 0.6rem 1.4rem; border-radius: 8px; font-size: 0.95rem; cursor: pointer; text-decoration: none; display: inline-block; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--card2); color: var(--muted); border: 1px solid var(--border2); padding: 0.6rem 1.4rem; border-radius: 8px; font-size: 0.95rem; cursor: pointer; text-decoration: none; display: inline-block; }
.btn-secondary:hover { color: var(--text); }
.btn-generate { background: var(--success); color: white; border: none; padding: 0.75rem 2rem; border-radius: 8px; cursor: pointer; display: flex; flex-direction: column; align-items: center; }
.btn-generate:hover { background: #059669; }
.btn-generate span { font-size: 1rem; font-weight: 600; }
.btn-generate .btn-sub { font-size: 0.75rem; opacity: 0.85; }
.btn-download { background: var(--card2); color: var(--muted); border: 1px solid var(--border2); padding: 0.4rem 1rem; border-radius: 6px; font-size: 0.85rem; text-decoration: none; }
.btn-download:hover { color: var(--text); }
.w-full { width: 100%; text-align: center; }

/* Forms */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.4rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; background: var(--card2); border: 1px solid var(--border2); color: var(--text);
  padding: 0.6rem 0.9rem; border-radius: 8px; font-size: 0.95rem; font-family: var(--font);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row.three { grid-template-columns: 1fr 1fr 1fr; }
.form-row.checks { display: flex; gap: 2rem; align-items: center; margin-bottom: 1.2rem; }
.form-check { display: flex; align-items: center; }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; font-size: 0.9rem; color: var(--muted); }
.checkbox-label input { width: auto; }
.form-hint { font-size: 0.82rem; color: var(--muted); margin-bottom: 1rem; }

/* Alerts */
.alert { padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; }
.alert-error { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }

/* Auth page */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.auth-container { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 2.5rem; width: 100%; max-width: 420px; }
.auth-header { text-align: center; margin-bottom: 2rem; }
.auth-logo { font-size: 2rem; font-weight: 800; color: var(--accent); letter-spacing: 0.1em; }
.auth-subtitle { color: var(--muted); font-size: 0.85rem; margin-top: 0.25rem; }
.auth-desc { color: var(--muted); font-size: 0.8rem; margin-top: 0.5rem; opacity: 0.8; }
.auth-tabs { display: flex; gap: 0; margin-bottom: 1.5rem; border: 1px solid var(--border2); border-radius: 8px; overflow: hidden; }
.tab-btn { flex: 1; padding: 0.5rem; background: transparent; border: none; color: var(--muted); cursor: pointer; font-size: 0.9rem; }
.tab-btn.active { background: var(--accent); color: white; }
.auth-docs { display: flex; gap: 0.5rem; justify-content: center; margin-top: 1.5rem; }
.doc-badge { background: var(--card2); border: 1px solid var(--border2); color: var(--muted); padding: 0.25rem 0.6rem; border-radius: 4px; font-size: 0.75rem; }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 2rem; }
.page-header h1 { font-size: 1.5rem; font-weight: 700; }
.back-link { color: var(--muted); text-decoration: none; font-size: 0.85rem; display: block; margin-bottom: 0.4rem; }
.back-link:hover { color: var(--text); }
.op-meta { color: var(--muted); font-size: 0.85rem; margin-top: 0.25rem; }

/* Dashboard grid */
.ops-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.op-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; text-decoration: none; color: var(--text); display: block; transition: border-color 0.15s; }
.op-card:hover { border-color: var(--border2); }
.op-ready { border-left: 3px solid var(--success); }
.op-generating { border-left: 3px solid var(--warning); }
.op-error { border-left: 3px solid var(--danger); }
.op-name { font-weight: 600; margin-bottom: 0.4rem; }
.op-date { color: var(--muted); font-size: 0.8rem; margin-bottom: 0.75rem; }
.op-status { margin-bottom: 0.75rem; }
.badge { padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.78rem; font-weight: 500; }
.badge-ready { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-generating { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-error { background: rgba(239,68,68,0.15); color: var(--danger); }
.op-docs { display: flex; gap: 0.4rem; }
.doc-tag { background: var(--card2); color: var(--muted); font-size: 0.72rem; padding: 0.15rem 0.5rem; border-radius: 4px; }

/* Empty state */
.empty-state { text-align: center; padding: 5rem 2rem; }
.empty-icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.4; }
.empty-state h2 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.empty-state p { color: var(--muted); margin-bottom: 1.5rem; }

/* Wizard */
.wizard-container { max-width: 720px; margin: 0 auto; }
.wizard-steps { display: flex; align-items: center; justify-content: center; margin-bottom: 2.5rem; }
.step { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; }
.step-num { width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--border2); display: flex; align-items: center; justify-content: center; font-size: 0.9rem; color: var(--muted); }
.step.active .step-num { border-color: var(--accent); background: var(--accent); color: white; }
.step.done .step-num { border-color: var(--success); background: var(--success); color: white; }
.step-label { font-size: 0.78rem; color: var(--muted); }
.step.active .step-label { color: var(--accent); }
.step-line { flex: 1; height: 2px; background: var(--border2); margin: 0 0.75rem; min-width: 60px; margin-bottom: 18px; }
.step-line.done { background: var(--success); }
.wizard-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; }
.wizard-card h2 { font-size: 1.2rem; margin-bottom: 1.5rem; }
.step-hint { color: var(--muted); font-size: 0.85rem; margin-bottom: 1.5rem; margin-top: -1rem; }
.wizard-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* SAIL table */
.sail-hint { background: var(--card2); border: 1px solid var(--border2); border-radius: 8px; padding: 1rem; margin-bottom: 1.2rem; font-size: 0.82rem; color: var(--muted); }
.sail-hint strong { color: var(--text); display: block; margin-bottom: 0.5rem; }
.sail-table { width: auto; border-collapse: collapse; font-size: 0.8rem; }
.sail-table th, .sail-table td { padding: 0.2rem 0.6rem; border: 1px solid var(--border2); text-align: center; }
.sail-table th { background: var(--bg); }

/* Operation / document view */
.doc-tabs { display: flex; gap: 0.5rem; margin-bottom: 0; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.doc-tab { background: transparent; border: 1px solid transparent; border-bottom: none; color: var(--muted); padding: 0.6rem 1.25rem; border-radius: 8px 8px 0 0; cursor: pointer; font-size: 0.9rem; }
.doc-tab.active { background: var(--card); border-color: var(--border); color: var(--text); margin-bottom: -1px; border-bottom: 1px solid var(--card); }
.doc-panel { background: var(--card); border: 1px solid var(--border); border-radius: 0 12px 12px 12px; padding: 0; }
.doc-panel.hidden { display: none; }
.doc-toolbar { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border); }
.doc-label { font-size: 0.9rem; color: var(--muted); font-weight: 500; }
.doc-content { padding: 1.5rem 2rem; font-size: 0.9rem; line-height: 1.75; max-width: 800px; }
.doc-missing { padding: 2rem; color: var(--muted); text-align: center; }

/* Generating / error states */
.generating-state, .error-state { text-align: center; padding: 5rem 2rem; }
.spinner { width: 48px; height: 48px; border: 3px solid var(--border2); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto 1.5rem; }
@keyframes spin { to { transform: rotate(360deg); } }
.generating-state h2 { font-size: 1.3rem; margin-bottom: 0.75rem; }
.generating-state p { color: var(--muted); }
.hint { font-size: 0.85rem; margin-top: 0.5rem; opacity: 0.7; }

@media (max-width: 600px) {
  .form-row, .form-row.three { grid-template-columns: 1fr; }
  .nav-links { gap: 0.75rem; }
  .page-header { flex-direction: column; gap: 1rem; }
}