:root {
  --kimi-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --kimi-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --kimi-color-surface: #ffffff;
  --kimi-color-surface-raised: #ffffff;
  --kimi-color-surface-strong: #f5f5f5;
  --kimi-color-surface-muted: #f8f8f8;
  --kimi-color-border: #e5e5e5;
  --kimi-color-text-primary: #1a1a1a;
  --kimi-color-text-secondary: #555555;
  --kimi-color-text-tertiary: #888888;
  --kimi-color-text-quaternary: #aaaaaa;
  --kimi-color-accent: #0066ff;
  --kimi-color-positive: #10b981;
  --kimi-color-warning: #f59e0b;
  --kimi-color-danger: #ef4444;
  --t-fast: 150ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --kimi-color-surface: #0a0a0a;
    --kimi-color-surface-raised: #141414;
    --kimi-color-surface-strong: #1a1a1a;
    --kimi-color-surface-muted: #1f1f1f;
    --kimi-color-border: #2a2a2a;
    --kimi-color-text-primary: #f0f0f0;
    --kimi-color-text-secondary: #a0a0a0;
    --kimi-color-text-tertiary: #707070;
    --kimi-color-text-quaternary: #505050;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { font-family: var(--kimi-font-sans); background: var(--kimi-color-surface); color: var(--kimi-color-text-primary); height: 100%; }

/* Login */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 0% 0%, color-mix(in srgb, var(--kimi-color-accent) 12%, transparent) 0%, transparent 40%),
    radial-gradient(circle at 100% 100%, color-mix(in srgb, var(--kimi-color-positive) 10%, transparent) 0%, transparent 45%),
    var(--kimi-color-surface-muted);
  position: relative;
}
.login-screen::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(color-mix(in srgb, var(--kimi-color-text-primary) 6%, transparent) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.5;
  pointer-events: none;
}
.login-card {
  position: relative;
  background: color-mix(in srgb, var(--kimi-color-surface-raised) 96%, transparent);
  border: 1px solid var(--kimi-color-border);
  border-radius: 24px;
  padding: 48px;
  width: 100%;
  max-width: 420px;
  box-shadow:
    0 24px 48px -12px color-mix(in srgb, var(--kimi-color-text-primary) 12%, transparent),
    0 0 0 1px color-mix(in srgb, var(--kimi-color-surface) 80%, transparent) inset;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.login-brand { display: flex; align-items: center; gap: 14px; margin-bottom: 36px; }
.login-brand .brand-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--kimi-color-text-primary) 0%, color-mix(in srgb, var(--kimi-color-text-primary) 70%, var(--kimi-color-accent)) 100%);
  color: var(--kimi-color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--kimi-color-text-primary) 20%, transparent);
}
.login-brand .brand-text { font-size: 24px; font-weight: 600; letter-spacing: -0.3px; }
.login-brand .brand-text span {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--kimi-color-text-tertiary);
  margin-top: 3px;
  letter-spacing: 0;
}
.login-card .field { margin-bottom: 20px; }
.login-card .field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--kimi-color-text-secondary);
  text-transform: none;
  margin-bottom: 2px;
}
.login-card .field input {
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid var(--kimi-color-border);
  background: var(--kimi-color-surface);
  font-size: 15px;
  transition: all var(--t-fast);
}
.login-card .field input:focus {
  border-color: var(--kimi-color-text-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--kimi-color-text-primary) 8%, transparent);
}
.login-card .btn.primary {
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--kimi-color-text-primary) 0%, color-mix(in srgb, var(--kimi-color-text-primary) 85%, var(--kimi-color-accent)) 100%);
  border: none;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--kimi-color-text-primary) 25%, transparent);
  transition: transform 120ms var(--ease-out), box-shadow 120ms var(--ease-out);
}
.login-card .btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px color-mix(in srgb, var(--kimi-color-text-primary) 30%, transparent);
  opacity: 1;
}
.login-card .btn.primary:active { transform: translateY(0); }
.login-links {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  font-size: 13px;
  font-weight: 500;
}
.login-links a {
  color: var(--kimi-color-text-secondary);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: all var(--t-fast);
}
.login-links a:hover {
  color: var(--kimi-color-text-primary);
  border-bottom-color: var(--kimi-color-border);
}
#loginMsg {
  margin-top: 18px;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 500;
}
@media (max-width: 480px) {
  .login-card { padding: 32px 24px; border-radius: 20px; }
  .login-brand { margin-bottom: 28px; }
}

/* App Shell */
.app-shell { display: flex; height: 100vh; overflow: hidden; }
.sidebar { width: 240px; background: var(--kimi-color-surface-raised); border-right: 1px solid var(--kimi-color-border); display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 20px; border-bottom: 1px solid var(--kimi-color-border); }
.sidebar-brand .brand-icon { width: 32px; height: 32px; font-size: 14px; }
.sidebar-brand .brand-text { font-size: 16px; }
.sidebar-brand .brand-text span { display: none; }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 10px; color: var(--kimi-color-text-secondary); text-decoration: none; font-size: 14px; font-weight: 500; margin-bottom: 2px; transition: all var(--t-fast); }
.nav-item:hover { background: var(--kimi-color-surface-muted); color: var(--kimi-color-text-primary); }
.nav-item.active { background: var(--kimi-color-surface-muted); color: var(--kimi-color-text-primary); }
.nav-item svg { flex-shrink: 0; }
.sidebar-footer { padding: 16px; border-top: 1px solid var(--kimi-color-border); }
.user-info { font-size: 12px; color: var(--kimi-color-text-tertiary); margin-bottom: 8px; }

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; border-bottom: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface-raised); }
.topbar h1 { font-size: 20px; font-weight: 500; }
.badge { display: inline-flex; align-items: center; padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 500; background: var(--kimi-color-surface-muted); color: var(--kimi-color-text-secondary); border: 1px solid var(--kimi-color-border); }
.page-content { flex: 1; overflow-y: auto; padding: 24px; }

/* Components */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 10px; border: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface-raised); color: var(--kimi-color-text-primary); font-size: 14px; font-weight: 500; cursor: pointer; transition: all var(--t-fast); }
.btn:hover { background: var(--kimi-color-surface-strong); }
.btn.primary { background: var(--kimi-color-text-primary); color: var(--kimi-color-surface); border-color: var(--kimi-color-text-primary); }
.btn.primary:hover { opacity: 0.9; }
.btn.danger { color: var(--kimi-color-danger); border-color: color-mix(in srgb, var(--kimi-color-danger) 30%, var(--kimi-color-border)); background: color-mix(in srgb, var(--kimi-color-danger) 6%, transparent); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--kimi-color-text-secondary); }
.btn.ghost:hover { background: var(--kimi-color-surface-muted); color: var(--kimi-color-text-primary); }
.btn.sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn.w-full { width: 100%; justify-content: center; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 12px; color: var(--kimi-color-text-secondary); font-weight: 500; text-transform: lowercase; }
.field input, .field select, .field textarea { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface); color: var(--kimi-color-text-primary); font-size: 14px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--kimi-color-text-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--kimi-color-text-primary) 8%, transparent); }
.field textarea { min-height: 80px; resize: vertical; }

.alert { padding: 12px 16px; border-radius: 10px; font-size: 13px; }
.alert.success { background: color-mix(in srgb, var(--kimi-color-positive) 8%, transparent); color: var(--kimi-color-positive); border: 1px solid color-mix(in srgb, var(--kimi-color-positive) 20%, transparent); }
.alert.error { background: color-mix(in srgb, var(--kimi-color-danger) 8%, transparent); color: var(--kimi-color-danger); border: 1px solid color-mix(in srgb, var(--kimi-color-danger) 20%, transparent); }

/* KPI */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.kpi { padding: 20px; border-radius: 12px; border: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface-raised); }
.kpi-label { font-size: 12px; color: var(--kimi-color-text-tertiary); text-transform: lowercase; margin-bottom: 8px; }
.kpi-value { font-size: 28px; font-weight: 500; font-variant-numeric: tabular-nums; }

/* Tables */
.panel { border: 1px solid var(--kimi-color-border); border-radius: 12px; background: var(--kimi-color-surface-raised); overflow: hidden; margin-bottom: 20px; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--kimi-color-border); display: flex; justify-content: space-between; align-items: center; }
.panel-title { font-size: 15px; font-weight: 500; }
.panel-body { padding: 0; }

.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.toolbar-left, .toolbar-right { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.search-box { padding: 8px 14px; border-radius: 10px; border: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface); color: var(--kimi-color-text-primary); font-size: 14px; width: 260px; }
.search-box:focus { outline: none; border-color: var(--kimi-color-text-primary); }
.filter-select { padding: 8px 12px; border-radius: 10px; border: 1px solid var(--kimi-color-border); background: var(--kimi-color-surface); color: var(--kimi-color-text-primary); font-size: 14px; cursor: pointer; }

table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
th { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--kimi-color-border); color: var(--kimi-color-text-secondary); font-weight: 500; font-size: 11px; text-transform: lowercase; letter-spacing: 0.5px; }
td { padding: 12px 16px; border-bottom: 1px solid var(--kimi-color-border); color: var(--kimi-color-text-primary); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--kimi-color-surface-muted); }

.tag { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 6px; font-size: 12px; font-weight: 500; }
.tag.success { background: color-mix(in srgb, var(--kimi-color-positive) 10%, transparent); color: var(--kimi-color-positive); }
.tag.warning { background: color-mix(in srgb, var(--kimi-color-warning) 10%, transparent); color: var(--kimi-color-warning); }
.tag.danger { background: color-mix(in srgb, var(--kimi-color-danger) 10%, transparent); color: var(--kimi-color-danger); }
.tag.info { background: color-mix(in srgb, var(--kimi-color-accent) 10%, transparent); color: var(--kimi-color-accent); }

.row-actions { opacity: 0; transition: opacity var(--t-fast); }
tr:hover .row-actions { opacity: 1; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.35); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px; backdrop-filter: blur(4px); }
.modal { background: var(--kimi-color-surface-raised); border-radius: 14px; width: 100%; max-width: 600px; max-height: 90vh; overflow-y: auto; border: 1px solid var(--kimi-color-border); box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.modal.wide { max-width: 800px; }
.modal-header { padding: 20px 24px; border-bottom: 1px solid var(--kimi-color-border); display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px 20px; border-top: 1px solid var(--kimi-color-border); display: flex; justify-content: flex-end; gap: 10px; }

/* Form grid */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }

/* Receipt */
.receipt-80mm { background: #fff; color: #000; width: 320px; margin: 0 auto; padding: 16px 12px; font-family: 'Courier New', monospace; font-size: 13px; line-height: 1.4; }
.receipt-80mm .center { text-align: center; }
.receipt-80mm .bold { font-weight: bold; }
.receipt-80mm .line { border-top: 1px dashed #000; margin: 8px 0; }
.receipt-80mm table { width: 100%; font-size: 12px; }
.receipt-80mm td { padding: 2px 0; }
.receipt-80mm .right { text-align: right; }

/* Invoice A4 preview */
.invoice-a4 { background: #fff; color: #1a1a1a; padding: 48px; border-radius: 4px; font-family: var(--kimi-font-sans); max-width: 720px; margin: 0 auto; }

/* Print */
@media print {
  .sidebar, .topbar, .btn { display: none !important; }
  .main { overflow: visible; }
  .page-content { padding: 0; }
}

/* Responsive */
@media (max-width: 900px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { width: 200px; }
}
@media (max-width: 640px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--kimi-color-border); }
  .sidebar-nav { display: flex; overflow-x: auto; padding: 8px; gap: 4px; }
  .nav-item { white-space: nowrap; margin-bottom: 0; }
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-box { width: 100%; }
}