*{box-sizing:border-box}
:root{
  --bg:#f5f7fb;
  --bg-2:#eef2ff;
  --surface:#ffffff;
  --surface-soft:#f8fafc;
  --text:#111827;
  --text-muted:#6b7280;
  --border:#e5e7eb;
  --sidebar:#0f172a;
  --sidebar-text:#e5e7eb;
  --sidebar-muted:#94a3b8;
  --primary:#111827;
  --primary-2:#1d4ed8;
  --primary-text:#ffffff;
  --success-bg:#dcfce7;
  --success-text:#166534;
  --error-bg:#fef2f2;
  --error-text:#991b1b;
  --shadow:0 20px 50px rgba(29,78,216,.12);
}
html[data-theme="dark"]{
  --bg:#0b1220;
  --bg-2:#111827;
  --surface:#111827;
  --surface-soft:#0f172a;
  --text:#e5e7eb;
  --text-muted:#94a3b8;
  --border:#243041;
  --sidebar:#020617;
  --sidebar-text:#e5e7eb;
  --sidebar-muted:#94a3b8;
  --primary:#2563eb;
  --primary-2:#0f172a;
  --primary-text:#ffffff;
  --success-bg:#123524;
  --success-text:#86efac;
  --error-bg:#3b1212;
  --error-text:#fca5a5;
  --shadow:0 20px 50px rgba(0,0,0,.35);
}
html,body{margin:0;padding:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}
body{min-height:100vh}
.layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.sidebar{background:var(--sidebar);color:var(--sidebar-text);padding:28px 20px;display:flex;flex-direction:column;gap:20px}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#22c55e,#14b8a6);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff}
.brand-title{font-weight:700;font-size:18px}
.brand-subtitle{font-size:13px;color:var(--sidebar-muted)}
.nav{display:flex;flex-direction:column;gap:8px}
.nav-link{padding:12px 14px;border-radius:12px;color:#cbd5e1;background:transparent;transition:.2s}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-link.active{background:#1d4ed8;color:#fff}
.sidebar-box{padding:16px;border:1px solid rgba(255,255,255,.08);border-radius:16px;background:rgba(255,255,255,.04)}
.sidebar-label{font-size:12px;color:var(--sidebar-muted);text-transform:uppercase;letter-spacing:.08em}
.sidebar-value{margin-top:6px;font-size:16px;font-weight:700}
.theme-switcher{display:grid;grid-template-columns:1fr;gap:8px;margin-top:10px}
.theme-btn{border:1px solid rgba(255,255,255,.12);background:transparent;color:#e5e7eb;padding:10px 12px;border-radius:10px;text-align:left;cursor:pointer}
.theme-btn.active{background:#1d4ed8;border-color:#1d4ed8}
.content{padding:32px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px}
.topbar h1{margin:0;font-size:32px}
.muted{margin:8px 0 0;color:var(--text-muted)}
.top-button{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;background:var(--primary);color:var(--primary-text);font-weight:600;border:none;cursor:pointer}
.hero{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;padding:32px;border-radius:24px;margin-bottom:24px;box-shadow:var(--shadow)}
.hero h2{margin:10px 0 12px;font-size:34px;line-height:1.1;max-width:900px}
.hero p{margin:0;max-width:780px;color:#dbeafe}
.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:#93c5fd}
.eyebrow.dark{color:#2563eb}
.cards{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;margin-bottom:24px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:20px}
.stat{padding:20px}
.stat span{display:block;color:var(--text-muted);font-size:14px;margin-bottom:12px}
.stat strong{font-size:32px;line-height:1.1}
.grid-two{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
.panel{padding:22px}
.panel h2,.panel h3{margin:0 0 14px}
.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.action-list{display:grid;gap:12px}
.action-item{padding:14px 16px;border-radius:14px;background:var(--surface-soft);color:var(--text);border:1px solid var(--border);font-weight:600}
.check-list{margin:0;padding-left:18px;color:var(--text);display:grid;gap:10px}
.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.section-text{margin:6px 0 0;color:var(--text-muted);max-width:720px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--border)}
.table th{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}
.badge{display:inline-flex;padding:8px 12px;border-radius:999px;background:var(--success-bg);color:var(--success-text);font-size:13px;font-weight:700}
.placeholder{min-height:220px;display:flex;flex-direction:column;justify-content:center}
.placeholder p{margin:0;color:var(--text-muted);max-width:640px}
.form-wrap{display:grid;gap:20px}
.form-intro h2{margin:10px 0 10px;font-size:32px}
.form-intro p{margin:0;color:var(--text-muted);max-width:760px}
.app-form{display:grid;gap:18px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:grid;gap:8px}
.field span{font-size:14px;font-weight:700;color:var(--text)}
.field input,.field textarea{width:100%;border:1px solid var(--border);border-radius:14px;padding:14px 16px;background:var(--surface);color:var(--text);font-size:15px;outline:none;transition:.2s}
.field input:focus,.field textarea:focus{border-color:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.field.full{grid-column:1 / -1}
.form-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:6px}
.ghost-button{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;border:1px solid var(--border);color:var(--text);background:var(--surface);font-weight:600}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.result-card h3{margin-bottom:16px}
.result-label{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:8px}
.result-list{display:grid;gap:14px}
.result-list div{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--border)}
.result-list span{color:var(--text-muted)}
.error-box{background:var(--error-bg);border-color:transparent}
.error-box h3,.error-box p{color:var(--error-text)}
@media (max-width:1100px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-two,.result-grid{grid-template-columns:1fr}
  .layout{grid-template-columns:1fr}
  .sidebar{padding:20px}
  .content{padding:20px}
}
@media (max-width:700px){
  .topbar,.section-head,.form-actions{flex-direction:column;align-items:flex-start}
  .cards,.form-grid,.result-grid{grid-template-columns:1fr}
  .hero h2,.form-intro h2,.topbar h1{font-size:26px}
  .ghost-button,.top-button{width:100%}
}

.topbar-actions{display:flex;align-items:center;gap:12px}
.theme-menu-wrap{position:relative}
.icon-button{width:46px;height:46px;border-radius:14px;border:1px solid var(--border);background:var(--surface);color:var(--text);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow)}
.theme-icon{width:20px;height:20px;display:none}
.icon-button[data-theme-mode="system"] .theme-icon-system{display:block}
.icon-button[data-theme-mode="light"] .theme-icon-light{display:block}
.icon-button[data-theme-mode="dark"] .theme-icon-dark{display:block}
.theme-menu{position:absolute;top:56px;right:0;min-width:190px;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:8px;display:none;z-index:30}
.theme-menu.open{display:grid;gap:6px}
.theme-option{display:flex;align-items:center;gap:10px;width:100%;padding:11px 12px;border:none;border-radius:12px;background:transparent;color:var(--text);cursor:pointer;text-align:left}
.theme-option:hover,.theme-option.active{background:var(--surface-soft)}
.theme-option-icon{width:20px;display:inline-flex;justify-content:center}
@media (max-width:700px){
  .topbar-actions{width:100%;justify-content:space-between}
  .theme-menu{right:auto;left:0}
}