/* openfile-az web UI — minimal, accessible, dark-mode-aware */

:root {
  --bg: #fafaf8;
  --bg-elev: #ffffff;
  --bg-muted: #f0efea;
  --border: #d9d6cd;
  --border-strong: #b3ae9f;
  --fg: #1a1a1a;
  --fg-muted: #555;
  --fg-subtle: #888;
  --accent: #2b5f8f;
  --accent-hover: #234d74;
  --success: #2f7c4e;
  --warn: #c18020;
  --error: #b6373c;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1e;
    --bg-elev: #26262b;
    --bg-muted: #2f2f35;
    --border: #3a3a42;
    --border-strong: #555561;
    --fg: #ededee;
    --fg-muted: #a7a7ad;
    --fg-subtle: #7a7a80;
    --accent: #6ba4d4;
    --accent-hover: #8bbce5;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--sans);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute; left: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem; background: var(--accent); color: white;
  padding: .5rem 1rem; border-radius: var(--radius); z-index: 100;
}

.container { max-width: 980px; margin: 0 auto; padding: 0 1rem; }

/* Header ------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 1rem 0;
}
.header-row {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  flex-wrap: wrap;
}
.site-title { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; }
.site-sub { margin: 0; color: var(--fg-muted); font-size: .9rem; }
nav[aria-label="primary"] a {
  color: var(--fg-muted);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: .95rem;
}
nav[aria-label="primary"] a:hover { color: var(--accent); }

/* Hero --------------------------------------------------------- */
.hero { padding: 2.5rem 0 1rem; }
.hero h2 { margin: 0 0 .5rem; font-size: 2rem; letter-spacing: -0.02em; }
.lede { font-size: 1.1rem; color: var(--fg-muted); max-width: 70ch; }

/* Status bar --------------------------------------------------- */
.status-bar {
  display: flex; align-items: center; gap: .75rem;
  padding: .75rem 1rem;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  margin-bottom: 1.5rem;
}
.status-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--warn);
  flex-shrink: 0;
  animation: pulse 1.4s ease-in-out infinite;
}
.status-dot[data-state="ready"] { background: var(--success); animation: none; }
.status-dot[data-state="error"] { background: var(--error); animation: none; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .5; transform: scale(.85); }
}

/* Cards -------------------------------------------------------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}
.card > header { margin-bottom: 1rem; }
.card h3 { margin: 0 0 .25rem; font-size: 1.2rem; }
.card-sub { margin: 0; color: var(--fg-muted); font-size: .95rem; max-width: 70ch; }

/* Tabs --------------------------------------------------------- */
.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.tab {
  background: none; border: none; padding: .5rem 1rem;
  color: var(--fg-muted); cursor: pointer; font-size: .95rem;
  border-bottom: 2px solid transparent;
  font-family: inherit;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tab-panel.hidden { display: none; }

/* Form grid ---------------------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.grid-2 label { display: flex; flex-direction: column; gap: .3rem; }
.grid-2 span { font-size: .85rem; color: var(--fg-muted); font-weight: 500; }
.col-span-2 { grid-column: 1 / -1; }
@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
}

input[type="text"], input[type="number"], select {
  padding: .5rem .65rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  font-size: .95rem;
  font-family: inherit;
}
input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

/* Drop zones --------------------------------------------------- */
.drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all .15s ease;
  background: var(--bg);
  color: var(--fg-muted);
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(43, 95, 143, .04);
  color: var(--fg);
}
.drop-zone.small { padding: 1rem; }
.drop-zone.filled {
  border-style: solid;
  border-color: var(--success);
  background: rgba(47, 124, 78, .04);
  color: var(--fg);
}
.drop-zone p { margin: 0; }
.drop-zone code { font-family: var(--mono); font-size: .85em; }

.file-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 820px) {
  .file-row { grid-template-columns: 1fr; }
}
.file-col { display: flex; flex-direction: column; gap: .5rem; }
.file-label {
  display: flex; align-items: center; justify-content: space-between;
  font-size: .95rem;
}
.badge {
  font-size: .7rem; font-weight: 600; text-transform: uppercase;
  padding: .15rem .5rem; border-radius: 10px; letter-spacing: .03em;
}
.badge.required { background: var(--accent); color: white; }
.badge.optional { background: var(--bg-muted); color: var(--fg-muted); }

.preview {
  font-size: .85rem;
  padding: .5rem .75rem;
  background: var(--bg-muted);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-family: var(--mono);
}
.preview.ok { border-left: 3px solid var(--success); }
.preview.warn { border-left: 3px solid var(--warn); }
.preview.err { border-left: 3px solid var(--error); }

.hint { font-size: .8rem; color: var(--fg-subtle); margin: 0; }
.hint a { color: var(--accent); }

/* Sample data card --------------------------------------------- */
.sample-card {
  border-left: 3px solid var(--accent);
  background: linear-gradient(180deg, var(--bg-elev) 0%, rgba(43,95,143,.03) 100%);
}
.sample-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .75rem 0 .5rem;
}
.sample-links a {
  display: inline-block;
  padding: .4rem .75rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--accent);
  text-decoration: none;
  font-size: .85rem;
  font-family: var(--mono);
  transition: all .12s ease;
}
.sample-links a:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* Manual entry ------------------------------------------------- */
.manual-entry {
  margin-top: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.manual-entry summary {
  padding: .75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
  color: var(--accent);
  background: var(--bg);
  list-style: none;
  user-select: none;
}
.manual-entry summary::-webkit-details-marker { display: none; }
.manual-entry summary::before {
  content: "▸ ";
  display: inline;
}
.manual-entry[open] summary::before { content: "▾ "; }
.manual-entry[open] summary {
  border-bottom: 1px solid var(--border);
}
.manual-form {
  padding: 1rem;
  background: var(--bg-muted);
}
.manual-form label span {
  font-size: .8rem;
  color: var(--fg-muted);
  font-weight: 500;
}

.entry-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}
.entry-table th {
  text-align: left;
  padding: .5rem .75rem;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: .8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: .03em;
}
.entry-table td {
  padding: .4rem .75rem;
  border-bottom: 1px solid var(--border);
}
.entry-table .btn-remove {
  background: none;
  border: none;
  color: var(--error);
  cursor: pointer;
  font-size: .85rem;
  padding: .2rem .5rem;
}
.entry-table .btn-remove:hover { text-decoration: underline; }

/* Signature ---------------------------------------------------- */
.sig-options { display: flex; flex-direction: column; gap: .75rem; }
.sig-option {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}
.sig-option:hover { background: var(--bg-muted); }
.sig-option input[type="radio"]:checked ~ span { font-weight: 600; }

/* Generate ----------------------------------------------------- */
.generate-card { background: linear-gradient(180deg, var(--bg-elev) 0%, var(--bg-muted) 100%); }
.summary {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: .85rem;
  white-space: pre-wrap;
}

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.5rem;
  font-size: 1rem;
  font-family: inherit;
  font-weight: 600;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--bg);
  color: var(--fg);
  transition: all .15s ease;
}
.btn:hover:not(:disabled) { background: var(--bg-muted); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

.spinner {
  width: 1em; height: 1em;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.results { margin-top: 1.5rem; }
.results ul { list-style: none; padding: 0; }
.results li {
  display: flex; justify-content: space-between; align-items: center;
  padding: .75rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: .5rem;
}
.results a { color: var(--accent); font-weight: 600; text-decoration: none; }
.results a:hover { text-decoration: underline; }

/* Info sections ------------------------------------------------ */
.card.info { background: var(--bg); }
.card.info ul { padding-left: 1.2rem; color: var(--fg-muted); }
.card.info li { margin-bottom: .5rem; }
.card.info strong { color: var(--fg); }

.self-host-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
@media (max-width: 820px) { .self-host-grid { grid-template-columns: 1fr; } }
.self-host-grid h4 { margin: 0 0 .5rem; font-size: 1rem; }
.self-host-grid pre {
  background: var(--bg-muted);
  padding: .75rem;
  border-radius: var(--radius);
  font-size: .8rem;
  overflow-x: auto;
  margin: 0 0 .5rem;
}
.self-host-grid code { font-family: var(--mono); }

/* Footer ------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 3rem;
  color: var(--fg-muted);
  font-size: .85rem;
  background: var(--bg-muted);
  margin-top: 3rem;
}
.site-footer p { margin: .25rem 0; }
.sponsor { color: var(--fg); }
.sponsor a { color: var(--accent); }
.disclaimer { color: var(--fg-subtle); font-size: .8rem; margin-top: .5rem; }

.hidden { display: none !important; }