/* ============================================================
   Flowfile Expressions — documentation & playground styles
   Aligned with the Flowfile docs theme (MkDocs Material):
   indigo primary #4051b5, orange accent #ff9100,
   Roboto text, Source Code Pro code, light-first + dark toggle.
   ============================================================ */

:root,
[data-theme="light"] {
  --primary: #4051b5;
  --primary-dark: #303fa1;
  --primary-tint: rgba(64, 81, 181, 0.08);
  --accent: #0fa896;
  --accent-dark: #0b8678;
  --accent-tint: rgba(43, 217, 199, 0.14);

  --bg: #ffffff;
  --bg-alt: #f5f6fa;
  --panel: #ffffff;
  --panel-head: #f3f4f9;
  --border: #e1e3ec;
  --text: #21242c;
  --text-dim: #5f6573;
  --code-bg: #f6f7fb;
  --shadow: 0 1px 3px rgba(20, 25, 60, 0.08), 0 1px 2px rgba(20, 25, 60, 0.04);

  --link: #4051b5;
  --ok: #2e7d32;
  --danger: #c62828;
  --danger-bg: rgba(198, 40, 40, 0.06);
  --danger-border: rgba(198, 40, 40, 0.4);

  --kw: #6f42c1;
  --str: #188038;
  --num: #b35c00;
  --col: #3949ab;
  --fn: #1565c0;
  --com: #8a8f9d;
  --op: #c45500;

  --header-bg: #4051b5;
  --header-text: #ffffff;
  --header-dim: rgba(255, 255, 255, 0.72);
}

[data-theme="dark"] {
  --primary: #5c6bc0;
  --primary-dark: #4051b5;
  --primary-tint: rgba(140, 158, 255, 0.12);
  --accent: #2bd9c7;
  --accent-dark: #6ce8da;
  --accent-tint: rgba(43, 217, 199, 0.12);

  --bg: #2e303e;
  --bg-alt: #282a37;
  --panel: #353748;
  --panel-head: #3c3f53;
  --border: #4a4d63;
  --text: #e3e5ee;
  --text-dim: #9a9eb3;
  --code-bg: #232531;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35);

  --link: #8c9eff;
  --ok: #81c784;
  --danger: #ef9a9a;
  --danger-bg: rgba(239, 154, 154, 0.08);
  --danger-border: rgba(239, 154, 154, 0.45);

  --kw: #c792ea;
  --str: #a5d6a7;
  --num: #ffb74d;
  --col: #8c9eff;
  --fn: #82aaff;
  --com: #707590;
  --op: #ffab70;

  --header-bg: #4051b5;
  --header-text: #ffffff;
  --header-dim: rgba(255, 255, 255, 0.72);
}

:root {
  --radius: 8px;
  --mono: "Source Code Pro", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  font-size: 16px;
  transition: background 0.2s, color 0.2s;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--primary-tint);
  border-radius: 4px;
  padding: 0.12em 0.35em;
}
pre code { background: none; padding: 0; }
h1, h2, h3 { line-height: 1.25; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.hidden { display: none !important; }
.placeholder { color: var(--text-dim); font-style: italic; padding: 12px; }

/* ---------------- header (Material-style indigo bar) ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  color: var(--header-text);
  box-shadow: 0 2px 6px rgba(20, 25, 60, 0.25);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; gap: 16px; }
.brand { display: flex; align-items: baseline; gap: 10px; color: var(--header-text); min-width: 0; }
.brand:hover { text-decoration: none; }
.brand-text { white-space: nowrap; }
.brand-icon {
  font-family: var(--mono); font-weight: 700; color: #16245e;
  background: #2bd9c7;
  border-radius: 6px; padding: 2px 7px; font-size: 14px;
}
.brand-text { font-weight: 700; color: var(--header-text); white-space: nowrap; }
.brand-sub { color: var(--header-dim); font-size: 12px; font-family: var(--mono); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.site-nav { display: flex; gap: 18px; font-size: 14px; align-items: center; }
.site-nav a { color: var(--header-dim); }
.site-nav a:hover { color: var(--header-text); text-decoration: none; }
.site-nav .gh-link { color: var(--header-text); font-weight: 500; }
.theme-toggle {
  background: rgba(255, 255, 255, 0.12); border: none; color: var(--header-text);
  border-radius: 50%; width: 32px; height: 32px; cursor: pointer; font-size: 15px;
  display: inline-flex; align-items: center; justify-content: center;
}
[data-theme="dark"] .theme-toggle { background: rgba(255, 255, 255, 0.08); }
.theme-toggle:hover { background: rgba(255, 255, 255, 0.22); }

/* ---------------- hero ---------------- */
.hero {
  padding: 84px 0 64px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin: 0 0 18px; font-weight: 700; }
.hero-tagline { max-width: 760px; margin: 0 auto 28px; color: var(--text-dim); font-size: 1.08rem; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 26px; }
.hero-install {
  display: inline-flex; align-items: center; gap: 8px; max-width: 100%;
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 14px; font-size: 14px;
}
.hero-install code { overflow-x: auto; white-space: nowrap; }
.hero-install code { background: none; }

/* ---------------- buttons ---------------- */
.btn {
  display: inline-block; border: 1px solid transparent; cursor: pointer;
  border-radius: 8px; padding: 10px 20px; font-size: 15px; font-weight: 600;
  font-family: var(--sans); transition: background 0.15s, opacity 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #ffffff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
[data-theme="dark"] .btn-ghost:hover { color: var(--link); border-color: var(--link); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.copy-btn {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 6px; cursor: pointer; padding: 2px 8px; font-size: 13px;
}
.copy-btn:hover { color: var(--text); border-color: var(--primary); }
.copy-btn.copied { color: var(--ok); border-color: var(--ok); }

/* ---------------- sections ---------------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 1.9rem; margin: 0 0 10px; }
.section-intro { color: var(--text-dim); max-width: 820px; margin-top: 0; }

/* ---------------- runtime status ---------------- */
.runtime-status {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); box-shadow: var(--shadow);
  padding: 10px 16px; margin: 18px 0;
  font-size: 14px; color: var(--text-dim);
}
.runtime-status.ready { border-color: var(--ok); color: var(--ok); }
.runtime-status.error { border-color: var(--danger-border); color: var(--danger); }
.spinner {
  width: 14px; height: 14px; flex: none;
  border: 2px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
.runtime-status.ready .spinner, .runtime-status.error .spinner { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- playground layout ---------------- */
.playground-stack { display: flex; flex-direction: column; gap: 20px; min-width: 0; }

.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--panel-head); border-bottom: 1px solid var(--border);
  padding: 8px 14px; min-height: 42px; flex-wrap: wrap;
}
.panel-title { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); }
.kbd-hint { font-size: 12px; color: var(--text-dim); font-family: var(--mono); }

.dataset-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.dataset-tab {
  background: transparent; color: var(--text-dim); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px 12px; font-size: 13px; cursor: pointer; font-family: var(--sans);
}
.dataset-tab.active { background: var(--primary-tint); color: var(--primary); border-color: var(--primary); font-weight: 600; }
[data-theme="dark"] .dataset-tab.active { color: var(--link); border-color: var(--link); }

/* ---------------- tables ---------------- */
.table-wrap { overflow: auto; max-height: 330px; }
.data-table { border-collapse: collapse; width: 100%; font-size: 13.5px; font-family: var(--mono); }
.data-table th {
  position: sticky; top: 0; background: var(--panel-head); text-align: left;
  padding: 7px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
.data-table th .dtype { display: block; font-weight: 400; font-size: 11px; color: var(--text-dim); }
.data-table td { padding: 5px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table tr:last-child td { border-bottom: none; }
.data-table .null { color: var(--text-dim); font-style: italic; }
.data-table th.result-col { color: var(--accent-dark); }
.data-table td.result-col { background: var(--accent-tint); color: var(--accent-dark); font-weight: 600; }

/* ---------------- editor ---------------- */
.editor-shell { position: relative; min-height: 110px; }
.editor-highlight, .editor-input {
  margin: 0; border: 0; width: 100%; min-height: 110px;
  font-family: var(--mono); font-size: 14.5px; line-height: 1.55;
  padding: 12px 14px; white-space: pre-wrap; word-wrap: break-word; overflow-wrap: break-word;
  tab-size: 4;
}
.editor-highlight {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
  background: var(--code-bg); color: var(--text);
}
.editor-input {
  position: relative; display: block; resize: vertical;
  background: transparent; color: transparent; caret-color: var(--accent);
  outline: none;
}
.editor-input::placeholder { color: var(--text-dim); opacity: 0.6; }
.editor-input::selection { background: var(--primary-tint); }

.tok-kw { color: var(--kw); font-weight: 600; }
.tok-str { color: var(--str); }
.tok-num { color: var(--num); }
.tok-col { color: var(--col); }
.tok-fn { color: var(--fn); }
.tok-com { color: var(--com); font-style: italic; }
.tok-op { color: var(--op); }

.editor-footer {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 14px; border-top: 1px solid var(--border);
}
.run-status { font-size: 13px; color: var(--text-dim); }
.run-status.ok { color: var(--ok); }
.run-status.err { color: var(--danger); }

.examples-row {
  margin-left: auto; font-size: 13px;
  display: flex; align-items: center; flex-wrap: wrap;
}
.examples-label { color: var(--text-dim); margin-right: 6px; }
.example-chip {
  display: inline-block; margin: 3px 4px 3px 0; cursor: pointer;
  background: var(--bg-alt); border: 1px solid var(--border);
  color: var(--text); border-radius: 999px; padding: 2px 11px; font-size: 12.5px;
  font-family: var(--sans);
}
.example-chip:hover { border-color: var(--accent); color: var(--accent-dark); background: var(--accent-tint); }

/* ---------------- autocomplete ---------------- */
.autocomplete {
  position: absolute; z-index: 50; min-width: 280px; max-width: 420px; max-height: 240px;
  overflow-y: auto; background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: 0 10px 28px rgba(20, 25, 60, 0.25);
  font-family: var(--mono); font-size: 13px;
}
.ac-item { padding: 6px 12px; cursor: pointer; display: flex; gap: 10px; align-items: baseline; }
.ac-item.selected, .ac-item:hover { background: var(--primary-tint); }
.ac-name { color: var(--fn); font-weight: 600; }
.ac-name.ac-col { color: var(--col); }
.ac-detail { color: var(--text-dim); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------- natural-language input (WebLLM) ---------------- */
.head-tools { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ai-toggle {
  background: var(--accent); color: #ffffff;
  border: 1px solid var(--accent-dark); border-radius: 999px;
  padding: 6px 16px; font-size: 13px; font-weight: 700; cursor: pointer;
  font-family: var(--sans); white-space: nowrap;
}
.ai-toggle:hover, .ai-toggle.active { background: var(--accent-dark); }
[data-theme="dark"] .ai-toggle { color: #16245e; border-color: transparent; }

.ai-panel {
  padding: 12px 14px;
  background: var(--accent-tint);
  border-bottom: 1px solid var(--border);
}
.ai-row { display: flex; gap: 8px; flex-wrap: wrap; }
.ai-row-sub { margin-top: 8px; align-items: center; }
.ai-model-label { font-size: 12.5px; font-weight: 600; color: var(--text-dim); }
.ai-model {
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 5px 10px; font-size: 13px; font-family: var(--sans);
  cursor: pointer; outline: none;
}
.ai-model:focus { border-color: var(--accent); }
.ai-input {
  flex: 1 1 280px; min-width: 0;
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 9px 13px; font-size: 14px; outline: none;
  font-family: var(--sans);
}
.ai-input:focus { border-color: var(--accent); }
.ai-status { margin: 10px 2px 0; font-size: 12.5px; color: var(--text-dim); line-height: 1.5; }
.ai-status:empty { display: none; }
.ai-status.ok { color: var(--ok); }
.ai-status.err { color: var(--danger); }

/* ---------------- output ---------------- */
.workbench-divider {
  background: var(--panel-head);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 6px 14px;
}
.output-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.output-tab {
  background: transparent; border: 1px solid transparent; color: var(--text-dim);
  border-radius: 7px; padding: 5px 13px; font-size: 13.5px; cursor: pointer; font-weight: 600;
  font-family: var(--sans);
}
.output-tab.active { background: var(--primary-tint); color: var(--primary); border-color: var(--primary); }
[data-theme="dark"] .output-tab.active { color: var(--link); border-color: var(--link); }
.output-body { padding: 12px 14px; min-height: 170px; }
.output-body .table-wrap { max-height: 420px; }

.error-box {
  background: var(--danger-bg); border: 1px solid var(--danger-border);
  color: var(--danger); border-radius: 8px; padding: 10px 14px; margin-bottom: 12px;
  font-family: var(--mono); font-size: 13px; white-space: pre-wrap;
}

.code-block { position: relative; background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; }
.code-block pre {
  margin: 0; padding: 14px 44px 14px 14px; overflow-x: auto;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.55; white-space: pre-wrap; word-break: break-word;
}
.code-copy { position: absolute; top: 8px; right: 8px; }
.pane-note { font-size: 13px; color: var(--text-dim); margin: 10px 2px 0; }

/* ---------------- syntax guide ---------------- */
.syntax-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(310px, 100%), 1fr)); gap: 18px; margin-top: 28px; }
.syntax-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow);
}
.syntax-card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--primary); }
[data-theme="dark"] .syntax-card h3 { color: var(--link); }
.syntax-card p { color: var(--text-dim); font-size: 14px; margin: 0 0 12px; }
.mini-code {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; margin: 0; font-family: var(--mono); font-size: 13px; line-height: 1.6;
  overflow-x: auto; color: var(--str);
}
.op-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.op-table td { padding: 5px 8px; border-bottom: 1px solid var(--border); color: var(--text-dim); }
.op-table td:first-child { font-family: var(--mono); color: var(--op); white-space: nowrap; }
.op-table tr:last-child td { border-bottom: none; }

/* ---------------- function reference ---------------- */
.ref-controls { margin: 26px 0 8px; display: flex; flex-direction: column; gap: 14px; }
#fn-search {
  width: 100%; max-width: 520px; background: var(--panel); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 11px 16px; font-size: 15px; outline: none;
  font-family: var(--sans); box-shadow: var(--shadow);
}
#fn-search:focus { border-color: var(--primary); }
.category-pills { display: flex; gap: 8px; flex-wrap: wrap; }
.category-pill {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 999px; padding: 5px 15px; font-size: 13.5px; cursor: pointer; font-family: var(--sans);
}
.category-pill.active { background: var(--primary-tint); color: var(--primary); border-color: var(--primary); font-weight: 600; }
[data-theme="dark"] .category-pill.active { color: var(--link); border-color: var(--link); }
.category-pill .count { opacity: 0.7; font-size: 12px; }

.fn-category-title { margin: 34px 0 14px; font-size: 1.25rem; color: var(--primary); }
[data-theme="dark"] .fn-category-title { color: var(--link); }
.fn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr)); gap: 16px; }
.fn-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; display: flex; flex-direction: column; gap: 8px; box-shadow: var(--shadow);
}
.fn-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.fn-sig { font-family: var(--mono); font-size: 14px; color: var(--fn); font-weight: 600; word-break: break-word; }
.fn-try {
  flex: none; background: transparent; border: 1px solid var(--border); color: var(--primary);
  border-radius: 6px; padding: 2px 10px; font-size: 12.5px; cursor: pointer; white-space: nowrap;
  font-family: var(--sans);
}
[data-theme="dark"] .fn-try { color: var(--link); }
.fn-try:hover { border-color: var(--accent); color: var(--accent-dark); background: var(--accent-tint); }
.fn-desc { font-size: 13.5px; color: var(--text-dim); margin: 0; }
.fn-example {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 7px;
  font-family: var(--mono); font-size: 12.5px; padding: 8px 10px;
  overflow-x: auto; white-space: normal; overflow-wrap: break-word;
}
.fn-example .arrow { color: var(--text-dim); margin: 0 6px; }
.fn-example .res { color: var(--str); }
.fn-example .ctx { display: block; margin-top: 3px; color: var(--text-dim); font-size: 11.5px; }
.fn-params { font-size: 12.5px; color: var(--text-dim); margin: 0; padding-left: 18px; }
.fn-params code { font-size: 0.95em; }
details.fn-more summary { cursor: pointer; font-size: 12.5px; color: var(--text-dim); user-select: none; }
details.fn-more summary:hover { color: var(--text); }

/* ---------------- how it works ---------------- */
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 28px 0; }
.how-step {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.how-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%; font-weight: 700;
  background: var(--primary); color: #ffffff;
}
.how-step h3 { margin: 12px 0 6px; }
.how-step p { color: var(--text-dim); font-size: 14px; margin: 0; }
.api-snippet { margin-top: 10px; }
.api-snippet h3 { margin-bottom: 10px; }
.how-note { color: var(--text-dim); font-size: 14px; max-width: 860px; margin-top: 26px; }

/* ---------------- footer ---------------- */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; text-align: center; color: var(--text-dim); font-size: 14px; background: var(--bg-alt); }

@media (max-width: 720px) {
  .site-nav { display: none; }
  .brand-sub { display: none; }
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .hero { padding: 48px 0 40px; }
  .hero h1 br { display: none; }
  .hero-tagline { font-size: 1rem; }
  .hero-install { font-size: 13px; }
  .panel-head { padding: 8px 10px; }
  .output-body { padding: 10px; }
  .workbench-divider { padding: 6px 10px; }
  .examples-row { margin-left: 0; flex-basis: 100%; }
  .data-table { font-size: 12.5px; }
  .autocomplete { max-width: calc(100vw - 48px); }
}