:root {
  --color-bg: #1b2f3b;           
  --color-surface: #203946;     
  --color-elevated: #1a3240;     
  --color-text: #eef7f4;        
  --color-muted: #c0d3cd;       

  --brand-green: #22c55e;       
  --brand-green-700: #15803d;
  --brand-green-950: #052e16;
  --brand-orange: #f97316;      
  --brand-orange-700: #c2410c;
  --brand-yellow: #fde047;      

  --ring: 2px solid rgba(255,255,255,0.08);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.35);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(34,197,94,0.14), transparent 60%),
              radial-gradient(1200px 800px at 120% 10%, rgba(249,115,22,0.12), transparent 60%),
              var(--color-bg);
  color: var(--color-text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }


.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.page-title {
  margin: 12px 0 20px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 0.2px;
}


.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.0)), var(--color-elevated);
  backdrop-filter: blur(8px);
  border-bottom: var(--ring);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
}

.brand-mark {
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-green));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.4px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 6px auto;
  background: var(--color-text);
  border-radius: 2px;
}

.nav-links {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid transparent;
}
.nav-links a:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.08);
}
.nav-links a.active {
  background: linear-gradient(180deg, rgba(34,197,94,0.15), rgba(34,197,94,0.06));
  border-color: rgba(34,197,94,0.25);
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; padding: 10px 16px; }
}


.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.04)), var(--color-surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 20px;
}


.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 42px;
  padding: 0 16px;
  background: rgba(255,255,255,0.08);
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  outline: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { background: rgba(255,255,255,0.12); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: linear-gradient(180deg, rgba(249,115,22,0.35), rgba(249,115,22,0.18));
  border-color: rgba(249,115,22,0.45);
}
.btn.primary:hover { background: linear-gradient(180deg, rgba(249,115,22,0.45), rgba(249,115,22,0.24)); }
.btn.success {
  background: linear-gradient(180deg, rgba(34,197,94,0.35), rgba(34,197,94,0.18));
  border-color: rgba(34,197,94,0.45);
}
.btn.success:hover { background: linear-gradient(180deg, rgba(34,197,94,0.45), rgba(34,197,94,0.24)); }
.btn.ghost {
  background: transparent;
  border-color: rgba(255,255,255,0.10);
}
.btn.danger {
  background: linear-gradient(180deg, rgba(244,63,94,0.20), rgba(244,63,94,0.08));
  border-color: rgba(244,63,94,0.40);
}
.is-hidden { display: none !important; }


.status {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px dashed rgba(255,255,255,0.10);
  color: var(--color-muted);
  display: none;
}
.status.show { display: block; }
.status.info { border-color: rgba(249,115,22,0.35); color: #ffd7bb; }
.status.success { border-color: rgba(34,197,94,0.35); color: #bff3cf; }
.status.error { border-color: rgba(244,63,94,0.45); color: #ffc6cf; }


#reader {
  margin-top: 16px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  background: #142431;
  box-shadow: var(--shadow-md);
}

.instructions {
  margin: 10px 0 16px;
  color: var(--color-muted);
}
.instructions h3 { margin: 0 0 8px; font-size: 16px; color: var(--color-text); }
.instructions ul { margin: 0; padding-left: 18px; }

.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.result-box {
  margin-top: 14px;
  display: none;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(34,197,94,0.35);
  background: linear-gradient(180deg, rgba(34,197,94,0.22), rgba(34,197,94,0.10));
}
.result-box.show { display: block; }
.result-label { color: #bff3cf; font-weight: 700; }
.result-value { margin-top: 6px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }

dialog#dialog {
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-lg);
  padding: 16px;
}
dialog::backdrop { background: rgba(0,0,0,0.55); }
dialog h2 { margin: 0 0 8px; }
dialog label { display: block; margin: 8px 0 6px; color: var(--color-muted); }
dialog input[type="number"] {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border-radius: 10px;
  background: rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text);
}
dialog button { margin-top: 12px; margin-right: 8px; }


.table-wrap { margin-top: 18px; }
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03)), var(--color-surface);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-md);
}
thead th {
  text-align: left;
  padding: 14px 16px;
  font-weight: 700;
  color: var(--color-muted);
  background: linear-gradient(180deg, rgba(249,115,22,0.20), rgba(249,115,22,0.10));
}
tbody td {
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
tbody tr:hover { background: rgba(255,255,255,0.03); }

.qty-actions {
  display: inline-flex;
  gap: 8px;
}
.qty-actions .plus-btn,
.qty-actions .minus-btn {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--color-text);
  cursor: pointer;
}
.qty-actions .plus-btn { border-color: rgba(34,197,94,0.35); background: rgba(34,197,94,0.12); }
.qty-actions .minus-btn { border-color: rgba(249,115,22,0.35); background: rgba(249,115,22,0.12); }

/* Utilities */
.stack-sm { display: grid; gap: 10px; }
.stack-md { display: grid; gap: 14px; }
.stack-lg { display: grid; gap: 20px; }
.muted { color: var(--color-muted); }

.grid-responsive {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 16px;
}
@media (max-width: 960px) {
  .grid-responsive { grid-template-columns: 1fr; }
}

a, button, input, dialog { transition: box-shadow .2s ease; }
a:focus-visible, button:focus-visible, input:focus-visible, dialog:focus-visible {
  box-shadow: 0 0 0 3px rgba(253, 224, 71, 0.35);
  outline: none;
}