/* layout.css — Payments Toolkit · Modern UI */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ══════════════════════ THEME VARIABLES ══════════════════════ */
:root {
  color-scheme: light;
  --bg:       #f1f5f9;
  --surface:  #ffffff;
  --muted:    #f8fafc;
  --border:   #e2e8f0;
  --border2:  #cbd5e1;
  --tx:       #0f172a;
  --tx2:      #64748b;
  --accent:   #2563eb;
  --ah:       #1d4ed8;
  --al:       #eff6ff;
  --axt:      #ffffff;
  --focus:    rgba(37,99,235,.18);
  --shad-s:   0 1px 3px rgba(0,0,0,.07),0 1px 2px rgba(0,0,0,.04);
  --shad-m:   0 4px 16px rgba(0,0,0,.09);
  --r:        8px;
  --r2:       5px;
  --amt-cr:   #16a34a;
  --amt-dr:   #dc2626;
  --ok-b:#22c55e; --ok-bg:#f0fdf4; --ok-t:#166534;
  --er-b:#ef4444; --er-bg:#fef2f2; --er-t:#991b1b;
  --wn-b:#f59e0b; --wn-bg:#fffbeb; --wn-t:#92400e;
  --in-b:#3b82f6; --in-bg:#eff6ff; --in-t:#1e40af;
}
[data-theme="dark"] {
  color-scheme: dark;
  --bg:       #0f172a;
  --surface:  #1e293b;
  --muted:    #162032;
  --border:   #334155;
  --border2:  #475569;
  --tx:       #f1f5f9;
  --tx2:      #94a3b8;
  --accent:   #3b82f6;
  --ah:       #60a5fa;
  --al:       #1e3354;
  --focus:    rgba(59,130,246,.25);
  --shad-s:   0 1px 3px rgba(0,0,0,.3);
  --shad-m:   0 4px 16px rgba(0,0,0,.45);
  --amt-cr:   #4ade80;
  --amt-dr:   #f87171;
  --ok-b:#22c55e; --ok-bg:#052e16; --ok-t:#86efac;
  --er-b:#ef4444; --er-bg:#450a0a; --er-t:#fca5a5;
  --wn-b:#f59e0b; --wn-bg:#422006; --wn-t:#fcd34d;
  --in-b:#3b82f6; --in-bg:#0c1a3a; --in-t:#93c5fd;
}

/* ══════════════════════ RESET ══════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 15px; line-height: 1.6;
  background: var(--bg); color: var(--tx);
  transition: background .2s, color .2s;
}

/* ══════════════════════ HEADER ══════════════════════ */
#main-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shad-s);
  position: sticky; top: 0; z-index: 100;
  transition: background .2s, border-color .2s;
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 1.25rem;
  display: flex; align-items: center; gap: 1rem;
  height: 54px; flex-wrap: wrap;
}
.site-title {
  font-size: 1.05rem; font-weight: 700;
  text-decoration: none; color: var(--tx);
  white-space: nowrap; letter-spacing: -.01em;
}
.site-title em { color: var(--accent); font-style: normal; }
#main-nav { display: flex; gap: 0.15rem; flex-wrap: wrap; margin-right: auto; }
#main-nav a {
  text-decoration: none; color: var(--tx2);
  padding: 0.3rem 0.6rem; border-radius: var(--r2);
  font-size: 0.875rem; font-weight: 500;
  transition: background .15s, color .15s;
}
#main-nav a:hover { color: var(--tx); background: var(--muted); }
#main-nav a.active { color: var(--accent); background: var(--al); font-weight: 600; }

/* Theme toggle */
.theme-toggle {
  display: flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border2); border-radius: 20px;
  background: transparent; color: var(--tx2);
  font-size: 0.8rem; font-weight: 500; font-family: inherit;
  cursor: pointer; white-space: nowrap;
  transition: all .15s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); background: var(--al); }

/* ══════════════════════ MAIN / PAGES ══════════════════════ */
#app { max-width: 1200px; margin: 0 auto; padding: 1.5rem 1.25rem; }
.page { display: none; }
.page.active { display: block; }
h1 { font-size: 1.55rem; font-weight: 700; margin-bottom: 0.35rem; letter-spacing: -.02em; }
h2 { font-size: 1.05rem; font-weight: 600; margin: 1.25rem 0 0.6rem; }
p  { margin-bottom: 0.6rem; color: var(--tx2); }

/* ══════════════════════ CARDS (HOME) ══════════════════════ */
.card-grid { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.25rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.25rem; width: 280px;
  box-shadow: var(--shad-s); transition: box-shadow .2s, border-color .2s;
}
.card:hover { box-shadow: var(--shad-m); border-color: var(--accent); }
.card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--tx); }
.card p  { font-size: 0.875rem; color: var(--tx2); margin: 0; }
.card a  {
  display: inline-block; margin-top: 0.75rem;
  color: var(--accent); font-size: 0.875rem; font-weight: 500; text-decoration: none;
}
.card a:hover { text-decoration: underline; }

/* ══════════════════════ UPLOAD AREA ══════════════════════ */
.upload-area {
  border: 2px dashed var(--border2); border-radius: var(--r);
  padding: 2rem 1.5rem; text-align: center; cursor: pointer;
  margin-bottom: 1rem; background: var(--muted); color: var(--tx2);
  transition: border-color .15s, background .15s, color .15s;
}
.upload-area:hover, .upload-area.drag-over {
  border-color: var(--accent); background: var(--al); color: var(--tx);
}
.upload-hint { font-size: 0.82rem; color: var(--tx2); margin-top: 0.35rem; }

/* ══════════════════════ BUTTONS ══════════════════════ */
button {
  padding: 0.45rem 1rem; border-radius: var(--r2);
  border: 1px solid var(--border2); background: var(--surface); color: var(--tx);
  font-size: 0.875rem; font-weight: 500; font-family: inherit;
  cursor: pointer; transition: all .15s;
}
button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: var(--al); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button[type=submit], button.btn-primary {
  background: var(--accent); border-color: var(--accent); color: var(--axt);
}
button[type=submit]:hover:not(:disabled), button.btn-primary:hover:not(:disabled) {
  background: var(--ah); border-color: var(--ah); color: var(--axt);
}
.gen-id-btn {
  padding: 0.25rem 0.6rem; font-size: 0.78rem;
  border-radius: 20px; flex-shrink: 0;
}
.remove-tx-btn { color: var(--er-t); border-color: var(--er-b); background: var(--er-bg); font-size: 0.8rem; }
.remove-tx-btn:hover:not(:disabled) { background: var(--er-b); color: #fff; border-color: var(--er-b); }

/* ══════════════════════ FORMS ══════════════════════ */
label { display: block; margin-bottom: 0.75rem; font-size: 0.875rem; font-weight: 500; }
input[type=text],
input[type=number],
input[type=date],
select,
textarea {
  display: block; width: 100%; max-width: 480px;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border2); border-radius: var(--r2);
  font-size: 0.875rem; font-family: inherit;
  background: var(--surface); color: var(--tx);
  margin-top: 0.3rem;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus);
}
textarea { font-family: 'Consolas','Courier New',monospace; font-size: 0.84rem; resize: vertical; }
input[type=file] { display: none; }
.required-mark { color: var(--er-b); margin-left: 2px; }
.field-help { font-size: 0.8rem; color: var(--tx2); margin-top: 0.25rem; }
.field-with-btn { display: flex; gap: 0.5rem; align-items: flex-end; max-width: 480px; }
.field-with-btn input { flex: 1; max-width: none; margin-top: 0; }

/* ══════════════════════ STATUS BOXES ══════════════════════ */
.status-ok, .status-error, .status-warn, .status-info {
  border-left: 4px solid; border-radius: var(--r2);
  padding: 0.6rem 0.85rem; margin-bottom: 0.65rem; font-size: 0.875rem;
}
.status-ok    { background: var(--ok-bg); border-color: var(--ok-b); color: var(--ok-t); }
.status-error { background: var(--er-bg); border-color: var(--er-b); color: var(--er-t); }
.status-warn  { background: var(--wn-bg); border-color: var(--wn-b); color: var(--wn-t); }
.status-info  { background: var(--in-bg); border-color: var(--in-b); color: var(--in-t); }

/* ══════════════════════ ISSUE LIST ══════════════════════ */
.issue-list { list-style: none; padding: 0; }
.issue-item {
  border-left: 4px solid var(--border2); border-radius: 0 var(--r2) var(--r2) 0;
  padding: 0.4rem 0.7rem; margin-bottom: 0.35rem;
  font-size: 0.875rem; background: var(--muted);
}
.issue-item.error { border-color: var(--er-b); background: var(--er-bg); color: var(--er-t); }
.issue-item.warn  { border-color: var(--wn-b); background: var(--wn-bg); color: var(--wn-t); }
.issue-item.info  { border-color: var(--in-b); background: var(--in-bg); color: var(--in-t); }
.issue-field { font-weight: 600; font-family: monospace; }
.issue-value { font-family: monospace; opacity: .75; }
.issue-hint  { font-size: 0.82rem; opacity: .85; }

/* ══════════════════════ FIELD SECTIONS (VALIDATION DETAIL) ══════════════════════ */
.field-section {
  border: 1px solid var(--border); border-radius: var(--r);
  margin-bottom: 1rem; overflow: hidden;
}
.field-section-header {
  background: var(--muted); padding: 0.55rem 0.9rem;
  font-weight: 600; font-size: 0.875rem;
  cursor: pointer; user-select: none;
  border-bottom: 1px solid var(--border);
  transition: background .15s, color .15s;
}
.field-section-header:hover { background: var(--al); color: var(--accent); }
.field-section-body { padding: 0.5rem 0.9rem; background: var(--surface); }
.field-row {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  padding: 0.3rem 0; border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
.field-row:last-child { border-bottom: none; }
.field-row.has-error { background: var(--er-bg); }
.field-row.has-warn  { background: var(--wn-bg); }
.field-row .f-path  { font-family: monospace; min-width: 250px; color: var(--tx2); }
.field-row .f-value { font-family: monospace; flex: 1; }
.f-badge {
  padding: 0.1rem 0.4rem; font-size: 0.78rem;
  border-radius: 4px; border: 1px solid;
}
.f-badge.error { border-color: var(--er-b); color: var(--er-t); background: var(--er-bg); }
.f-badge.warn  { border-color: var(--wn-b); color: var(--wn-t); background: var(--wn-bg); }
.f-badge.ok    { border-color: var(--ok-b); color: var(--ok-t); background: var(--ok-bg); }

/* ══════════════════════ TABLE ══════════════════════ */
.data-table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; font-size: 0.875rem; }
.data-table th {
  background: var(--muted); padding: 0.4rem 0.6rem;
  text-align: left; border-bottom: 2px solid var(--border2);
  font-weight: 600; font-size: 0.8rem; color: var(--tx2);
  text-transform: uppercase; letter-spacing: .03em;
}
.data-table td { padding: 0.3rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--muted); }
.amt-credit { color: var(--amt-cr); font-weight: 600; }
.amt-debit  { color: var(--amt-dr); font-weight: 600; }

/* ══════════════════════ SUMMARY BOX ══════════════════════ */
.summary-box { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1rem; }
.summary-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 0.75rem 1rem;
  min-width: 145px; box-shadow: var(--shad-s);
}
.summary-item .s-label { font-size: 0.75rem; color: var(--tx2); font-weight: 500; text-transform: uppercase; letter-spacing: .04em; }
.summary-item .s-value { font-size: 1.15rem; font-weight: 700; margin-top: 0.1rem; }

/* ══════════════════════ CHARTS ══════════════════════ */
.chart-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.chart-box {
  flex: 1; min-width: 300px; max-width: 600px;
  border: 1px solid var(--border); border-radius: var(--r);
  padding: 0.75rem; background: var(--surface); box-shadow: var(--shad-s);
}

/* ══════════════════════ SECONDARY TABS ══════════════════════ */
.tabs-secondary {
  display: flex; gap: 0.25rem; flex-wrap: wrap;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--border); padding-bottom: 0;
}
.tab-btn {
  border: 1px solid transparent; border-bottom: none;
  background: transparent; color: var(--tx2);
  padding: 0.4rem 0.85rem; border-radius: var(--r2) var(--r2) 0 0;
  font-size: 0.875rem; font-weight: 500; font-family: inherit;
  cursor: pointer; position: relative; bottom: -2px;
  transition: all .15s;
}
.tab-btn:hover:not(.active) { background: var(--muted); color: var(--tx); }
.tab-btn.active {
  background: var(--surface); border-color: var(--border);
  border-bottom-color: var(--surface); color: var(--accent); font-weight: 600;
}
.tool-panel { display: none; }
.tool-panel.active { display: block; }

/* ══════════════════════ CREATOR ══════════════════════ */
.tx-block {
  border: 1px solid var(--border); border-radius: var(--r);
  padding: 1rem; margin-bottom: 0.75rem; background: var(--muted);
}
.tx-block-header {
  display: flex; align-items: center; gap: 0.75rem;
  font-weight: 600; font-size: 0.875rem;
  margin-bottom: 0.75rem; color: var(--tx);
}
#creator-xml-preview {
  background: var(--muted); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1rem;
  font-family: 'Consolas','Courier New',monospace; font-size: 0.8rem;
  max-height: 400px; overflow: auto;
  white-space: pre; word-break: break-all;
  color: var(--tx); margin-bottom: 0.75rem;
}

/* ══════════════════════ MISC ══════════════════════ */
.loader { color: var(--tx2); font-size: 0.875rem; }
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--tx2); }