/* CL Design System – GitHub Pages UI (no build) */

:root{
  --ui-bg: #f6f7fb;
  --ui-surface: #ffffff;
  --ui-surface-2: #f1f5f9;
  --ui-border: rgba(15,23,42,.12);
  --ui-text: #0f172a;
  --ui-text-soft: rgba(15,23,42,.66);
  --ui-accent: #2563eb;
  --ui-accent-2: #16a34a;
  --ui-danger: #dc2626;
  --ui-topbar-bg: rgba(255,255,255,.78);

  --ui-radius: 14px;
  --ui-shadow: 0 10px 30px rgba(2,6,23,.12);

  --ui-font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji"
}

html[data-theme="dark"]{
  --ui-bg: #0b1220;
  --ui-surface: #111c33;
  --ui-surface-2: #0f172a;
  --ui-border: rgba(148,163,184,.22);
  --ui-text: #f1f5f9;
  --ui-text-soft: rgba(241,245,249,.72);
  --ui-accent: #3b82f6;
  --ui-accent-2: #22c55e;
  --ui-danger: #ef4444;
  --ui-topbar-bg: rgba(11,18,32,.78);

  --ui-radius: 14px;
  --ui-shadow: 0 10px 30px rgba(0,0,0,.35);
}


*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--ui-font);
  color: var(--ui-text);
  background:
    radial-gradient(1200px 800px at 20% -10%, rgba(59,130,246,.25), transparent 55%),
    radial-gradient(900px 700px at 100% 0%, rgba(34,197,94,.18), transparent 55%),
    var(--ui-bg);
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }

.skip-link{
  position:absolute; left:-999px; top:auto;
  width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:16px; top:16px; width:auto; height:auto; padding:10px 12px;
  background: var(--ui-surface); border: 1px solid var(--ui-border);
  border-radius: 10px; z-index: 9999;
}

.topbar{
  position: sticky; top:0; z-index: 50;
  background: var(--ui-topbar-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ui-border);
}
.topbar-inner{
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
}
.brand{
  display:flex; align-items:center; gap: 12px;
  font-weight: 650;
  letter-spacing: .2px;
}
.brand-badge{
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, rgba(59,130,246,.9), rgba(34,197,94,.85));
  box-shadow: 0 12px 26px rgba(59,130,246,.2);
}
.nav{
  display:flex; gap: 10px; flex-wrap: wrap;
}
.nav a{
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--ui-text-soft);
}
.nav a[aria-current="page"], .nav a:hover{
  color: var(--ui-text);
  border-color: var(--ui-border);
  text-decoration: none;
  background: rgba(255,255,255,.03);
}

.page{
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.grid{
  display:grid;
  grid-template-columns: 420px 1fr;
  gap: 16px;
}
@media (max-width: 1020px){
  .grid{ grid-template-columns: 1fr; }
}

.panel{
  background: rgba(17,28,51,.72);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  box-shadow: var(--ui-shadow);
  overflow: hidden;
}
.panel-header{
  padding: 14px 14px 10px 14px;
  border-bottom: 1px solid var(--ui-border);
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: 10px;
}
.panel-title{
  font-size: 14px;
  color: var(--ui-text-soft);
  margin:0;
}
.panel-subtitle{
  margin: 6px 0 0 0;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: .2px;
}
.panel-body{ padding: 14px; }

.section{
  margin: 14px 0 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(148,163,184,.22);
}
.section:first-child{ border-top: 0; padding-top: 0; margin-top: 0; }
.section h3{
  margin: 0 0 10px 0;
  font-size: 13px;
  color: var(--ui-text-soft);
  text-transform: uppercase;
  letter-spacing: .12em;
}

.form-row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 520px){
  .form-row{ grid-template-columns: 1fr; }
}

label{
  display:block;
  font-size: 13px;
  color: var(--ui-text-soft);
  margin: 0 0 6px 0;
}
input, select, textarea{
  width:100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(148,163,184,.26);
  background: rgba(15,23,42,.65);
  color: var(--ui-text);
  outline: none;
}
input:focus, select:focus, textarea:focus{
  border-color: rgba(59,130,246,.7);
  box-shadow: 0 0 0 4px rgba(59,130,246,.15);
}

.help{
  margin-top: 6px;
  font-size: 12px;
  color: rgba(241,245,249,.6);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(148,163,184,.26);
  background: rgba(255,255,255,.04);
  color: var(--ui-text);
  cursor: pointer;
  font-weight: 600;
}
.btn:hover{ background: rgba(255,255,255,.07); }
.btn.primary{
  border-color: rgba(59,130,246,.55);
  background: rgba(59,130,246,.16);
}
.btn.primary:hover{ background: rgba(59,130,246,.22); }
.btn.success{
  border-color: rgba(34,197,94,.55);
  background: rgba(34,197,94,.14);
}
.btn.danger{
  border-color: rgba(239,68,68,.55);
  background: rgba(239,68,68,.12);
}

.actions{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}

.preview{
  min-height: 640px;
  background: rgba(17,28,51,.62);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  box-shadow: var(--ui-shadow);
  overflow:hidden;
  display:flex;
  flex-direction: column;
}
.preview-toolbar{
  padding: 10px 12px;
  border-bottom: 1px solid var(--ui-border);
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}
.preview-toolbar .hint{
  font-size: 12px;
  color: var(--ui-text-soft);
}
.preview iframe{
  width: 100%;
  border: 0;
  flex: 1;
  background: white;
}

.codebox{
  font-family: var(--ui-mono);
  font-size: 12px;
  line-height: 1.5;
  background: rgba(15,23,42,.75);
  border: 1px solid rgba(148,163,184,.22);
  border-radius: 14px;
  padding: 12px;
  overflow:auto;
  max-height: 52vh;
  white-space: pre;
}

.modal{
  position: fixed;
  inset: 0;
  display:none;
  align-items:center;
  justify-content:center;
  padding: 18px;
  background: rgba(2,6,23,.65);
  z-index: 100;
}
.modal[aria-hidden="false"]{ display:flex; }
.modal-card{
  width: min(980px, 100%);
  background: rgba(17,28,51,.95);
  border: 1px solid var(--ui-border);
  border-radius: 18px;
  box-shadow: var(--ui-shadow);
  overflow:hidden;
}
.modal-head{
  padding: 14px 14px 10px 14px;
  border-bottom: 1px solid var(--ui-border);
  display:flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.modal-head h2{
  margin:0;
  font-size: 14px;
  color: var(--ui-text-soft);
  font-weight: 650;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.modal-body{ padding: 14px; }
.tabs{
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.tab-btn{
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(148,163,184,.22);
  background: rgba(255,255,255,.03);
  color: var(--ui-text);
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
}
.tab-btn[aria-selected="true"]{
  border-color: rgba(59,130,246,.55);
  background: rgba(59,130,246,.16);
}
.tab-panel{ display:none; }
.tab-panel[aria-hidden="false"]{ display:block; }

.toast{
  position: fixed;
  right: 16px;
  bottom: 16px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(17,28,51,.92);
  border: 1px solid rgba(148,163,184,.22);
  color: var(--ui-text);
  display:none;
  box-shadow: var(--ui-shadow);
}
.toast.show{ display:block; }


/* Theme toggle + a11y helpers */
.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}
.icon-btn{
  margin-left: 10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--ui-border);
  background: var(--ui-surface);
  color: var(--ui-text);
  box-shadow: 0 1px 0 rgba(2,6,23,.06);
}
.icon-btn:hover{ transform: translateY(-1px); }
.icon-btn:active{ transform: translateY(0); }
.icon-btn:focus-visible{
  outline: 3px solid rgba(37,99,235,.35);
  outline-offset: 2px;
}
.icon{ font-size: 16px; line-height: 1; }


/* Gallery cards */
.stack{ display:flex; flex-direction:column; gap:16px; }
.card{
  border: 1px solid var(--ui-border);
  background: var(--ui-surface);
  border-radius: var(--ui-radius);
  box-shadow: 0 1px 0 rgba(2,6,23,.06);
  overflow:hidden;
}
.card-head{
  display:flex;
  gap: 14px;
  align-items:flex-start;
  justify-content:space-between;
  padding: 16px 16px 12px 16px;
}
.card-actions{ display:flex; gap:10px; flex-wrap:wrap; justify-content:flex-end; }
.h3{ margin:0; font-size: 16px; letter-spacing: .2px; }
.code{
  margin: 0;
  padding: 14px 16px;
  background: var(--ui-surface-2);
  border-top: 1px solid var(--ui-border);
  overflow:auto;
  font-size: 13px;
  line-height: 1.55;
}
.code code{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }


/* Rich content blocks */
.content{ padding: 0 16px 16px 16px; }
.content h2{ margin: 18px 0 10px; font-size: 16px; }
.content p, .content li{ color: var(--ui-text); }
.content ol, .content ul{ padding-left: 18px; }
.content code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12.5px;
  padding: 2px 6px;
  border: 1px solid var(--ui-border);
  border-radius: 10px;
  background: var(--ui-surface-2);
}
.table-wrap{
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  overflow:auto;
  background: var(--ui-surface);
}
.table{
  width:100%;
  border-collapse: collapse;
  min-width: 760px;
}
.table th, .table td{
  text-align:left;
  vertical-align: top;
  padding: 12px 12px;
  border-bottom: 1px solid var(--ui-border);
  font-size: 13px;
  line-height: 1.5;
}
.table th{
  position: sticky;
  top: 0;
  background: var(--ui-surface);
  z-index: 1;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ui-text-soft);
}
.table tr:last-child td{ border-bottom: none; }
.checklist{ list-style: none; padding-left: 0; margin: 0; }
.checklist li{
  display:flex;
  gap:10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--ui-border);
}
.checklist li::before{
  content: "✓";
  font-weight: 700;
  color: var(--ui-accent-2);
}


/* Callout */
.callout{
  margin: 0 0 16px;
  padding: 12px 14px;
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius);
  background: color-mix(in srgb, var(--ui-surface) 70%, var(--ui-surface-2));
}
.callout strong{ font-weight: 700; }
.callout a{ color: var(--ui-accent); text-decoration: none; }
.callout a:hover{ text-decoration: underline; }