:root{--panel:#ffffff;--border-strong:rgba(37,99,235,.18);--accent3:#138a92;--card-grad:linear-gradient(180deg, rgba(255,255,255,.99), rgba(248,250,252,.98));--chip-text:#095a60;--good:#065f46;--bad:#991b1b;--warn:#92400e}
html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],html[data-theme="dark"],.tool-app html.tool-dark,.tool-app body.tool-dark{color-scheme:dark;--bg:#08111f;--bg2:#0b1324;--surface:rgba(15,23,42,.78);--surface-strong:rgba(15,23,42,.98);--surface-soft:rgba(255,255,255,.04);--panel:rgba(15,23,42,.94);--text:#e6eefb;--muted:#8aa19f;--muted-2:#c6d4d2;--border:rgba(148,163,184,.16);--border-strong:rgba(99,102,241,.28);--shadow:0 20px 46px rgba(2,6,23,.24);--shadow-soft:0 10px 24px rgba(2,6,23,.16);--hero-bg:radial-gradient(circle at 0% 0%, rgba(37,99,235,.18), transparent 34%),
        radial-gradient(circle at 100% 100%, rgba(124,58,237,.16), transparent 40%),
        linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.018));--card-grad:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.02));--input-bg:rgba(255,255,255,.045);--input-text:#e6eefb;--input-border:rgba(148,163,184,.16);--input-focus:rgba(96,165,250,.18);--chip-bg:rgba(96,165,250,.12);--chip-text:#d4ecea;--good:#86efac;--bad:#fca5a5;--warn:#fdba74}
.tool-app *{box-sizing:border-box}
.tool-app button,.tool-app input,.tool-app select,.tool-app textarea{font:inherit}
.tool-app button{-webkit-tap-highlight-color:transparent}
.tool-app a{text-decoration:none;color:inherit}
.tool-app input,.tool-app select,.tool-app textarea{outline:none}
.hero,.main-tool,.extras,.guide{max-width:1440px;margin:0 auto;padding:0 18px}
.hero{padding-top:24px}
.hero-shell{border:1px solid var(--border);border-radius:16px;overflow:hidden;background:var(--hero-bg);box-shadow:var(--shadow);position:relative;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(340px,.9fr);gap:22px;padding:34px;align-items:stretch}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--chip-text);font-size:.8rem;font-weight:800;margin-bottom:14px}
.hero h1{margin:0 0 12px;font-size:clamp(2.2rem,3.8vw,3.9rem);line-height:1.02;letter-spacing:-.03em;color:var(--text);background:none;-webkit-background-clip:initial;-webkit-text-fill-color:currentColor}
.hero p{margin:0;color:var(--muted);line-height:1.85;font-size:1rem;max-width:760px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-tags span{min-height:42px;padding:0 14px;display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text);font-size:.82rem;font-weight:750}
.hero-side{display:grid;gap:14px}
.hero-card{border:1px solid var(--border);border-radius:14px;background:var(--surface);box-shadow:var(--shadow-soft);padding:20px}
.hero-card small{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:7px;font-weight:800}
.hero-card strong{display:block;font-size:1.5rem;line-height:1.18;color:var(--text);letter-spacing:-.03em;word-break:break-word}
.hero-card span{display:block;margin-top:8px;color:var(--muted);line-height:1.6;font-size:.87rem}
.hero-mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.main-tool{margin-top:18px;margin-bottom:18px}
.tool-shell{border:1px solid var(--border);background:var(--surface);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.tool-head{padding:22px 24px 18px;border-bottom:1px solid var(--border);background:linear-gradient(180deg, rgba(37,99,235,.06), transparent);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.tool-head h2{margin:0;font-size:1.18rem;color:var(--text);letter-spacing:-.02em}
.tool-head p{margin:6px 0 0;color:var(--muted);font-size:.9rem;line-height:1.65;max-width:760px}
.inline-status{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:0 15px;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text);font-weight:800;font-size:.82rem}
.tool-body{padding:22px}
.top-tools{display:grid;grid-template-columns:minmax(0,1fr) auto auto auto;gap:12px;align-items:start;margin-bottom:18px}
.tool-btn,.tool-btn-primary,.tool-btn-danger,.tool-btn-ghost{min-height:46px;padding:0 18px;border-radius:16px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:.92rem;font-weight:800;cursor:pointer;transition:transform .16s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease, opacity .18s ease;white-space:nowrap}
.tool-btn-primary{color:#fff;background:var(--accent-grad);box-shadow:0 14px 28px rgba(37,99,235,.22)}
.tool-btn{color:var(--chip-text);background:rgba(37,99,235,.08);border-color:var(--border-strong)}
.tool-btn-danger{color:#fff;background:linear-gradient(135deg,#dc2626,#b91c1c);box-shadow:0 14px 28px rgba(220,38,38,.18)}
.tool-btn-ghost{color:var(--text);background:var(--surface-soft);border-color:var(--border)}
.tool-btn-primary:hover,.tool-btn:hover,.tool-btn-danger:hover,.tool-btn-ghost:hover{transform:translateY(-1px)}
.tool-btn[disabled],.mini-btn[disabled]{opacity:.6;cursor:not-allowed;transform:none !important}
.tool-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(360px,.8fr);gap:18px;align-items:start}
.left-stack,.right-stack{display:grid;gap:16px}
.right-stack{position:sticky;top:84px}
.panel{border:1px solid var(--border);border-radius:14px;background:var(--card-grad);padding:20px;display:grid;gap:14px;height:100%}
.panel-headline{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}
.panel-headline strong{color:var(--text);font-size:1.02rem;line-height:1.35}
.panel-headline span{color:var(--muted);font-size:.84rem;line-height:1.6;display:block;margin-top:4px}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{color:var(--text);font-size:.8rem;font-weight:800}
.field input,.field select,.field textarea{width:100%;min-height:54px;border-radius:16px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--input-text);padding:13px 15px;transition:border-color .18s ease, box-shadow .18s ease, background .18s ease;resize:vertical}
.field textarea{min-height:118px;line-height:1.65}
.field input::placeholder,.field textarea::placeholder{color:var(--muted)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(37,99,235,.34);box-shadow:0 0 0 4px var(--input-focus)}
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.helper-row{display:flex;flex-wrap:wrap;gap:10px}
.helper-chip{min-height:38px;padding:0 12px;display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--muted-2);font-size:.8rem;font-weight:800;cursor:pointer;transition:.18s ease}
.helper-chip:hover{transform:translateY(-1px);border-color:rgba(37,99,235,.28);color:var(--accent)}
.editor-foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:center}
.tiny-note{color:var(--muted);font-size:.8rem;line-height:1.6}
.char-count{min-height:36px;padding:0 12px;display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text);font-size:.78rem;font-weight:800}
.control-bar{display:grid;grid-template-columns:minmax(0,1fr) 180px 180px;gap:12px;align-items:center}
.ai-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:14px}
.ai-box{border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:16px;display:grid;gap:12px}
.snippet-list{display:grid;gap:12px;max-height:760px;overflow:auto;padding-right:2px}
.snippet-item{border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:16px;display:grid;gap:12px;transition:.18s ease}
.snippet-item:hover{transform:translateY(-1px);box-shadow:var(--shadow-soft)}
.snippet-item.active{border-color:rgba(37,99,235,.30);box-shadow:0 0 0 1px rgba(37,99,235,.14), 0 18px 34px rgba(37,99,235,.09)}
.snippet-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.snippet-main{min-width:0}
.snippet-main strong{display:block;font-size:1rem;color:var(--text);line-height:1.35;word-break:break-word}
.snippet-main code{display:inline-block;margin-top:6px;padding:6px 10px;border-radius:10px;background:rgba(37,99,235,.08);color:var(--chip-text);border:1px solid var(--border-strong);font-size:.8rem;font-weight:800;word-break:break-all}
.snippet-preview{color:var(--muted);font-size:.84rem;line-height:1.65;word-break:break-word;white-space:pre-wrap}
.snippet-meta{display:flex;flex-wrap:wrap;gap:8px}
.meta-chip{min-height:34px;padding:0 10px;display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--border);background:var(--surface-soft);color:var(--muted-2);font-size:.74rem;font-weight:800}
.meta-chip.good{color:var(--good);border-color:rgba(22,163,74,.2);background:rgba(22,163,74,.08)}
.meta-chip.bad{color:var(--bad);border-color:rgba(220,38,38,.16);background:rgba(220,38,38,.07)}
.snippet-actions{display:flex;flex-wrap:wrap;gap:8px}
.mini-btn{min-height:36px;padding:0 12px;border-radius:12px;border:1px solid var(--border);background:var(--surface-soft);color:var(--text);cursor:pointer;font-size:.78rem;font-weight:800;transition:.18s ease}
.mini-btn:hover{transform:translateY(-1px);border-color:rgba(37,99,235,.26)}
.result-stack{display:grid;gap:12px}
.result-card{border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:16px;position:relative;overflow:hidden}
.result-card.highlight{background:linear-gradient(135deg, rgba(37,99,235,.12), rgba(124,58,237,.12));border-color:rgba(37,99,235,.24)}
.result-card small{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:7px;font-weight:800}
.result-card strong{display:block;color:var(--text);font-size:1.12rem;line-height:1.45;letter-spacing:-.02em;word-break:break-word;white-space:pre-wrap}
.result-card span{display:block;margin-top:7px;color:var(--muted);font-size:.83rem;line-height:1.62}
.playground{display:grid;gap:14px}
.play-area{width:100%;min-height:180px;border-radius:18px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--input-text);padding:15px;line-height:1.7;resize:vertical}
.play-area:focus{border-color:rgba(37,99,235,.34);box-shadow:0 0 0 4px var(--input-focus)}
.kpi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.kpi{border:1px solid var(--border);border-radius:20px;background:var(--surface);padding:16px}
.kpi small{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-weight:800}
.kpi strong{display:block;color:var(--text);font-size:1.08rem;line-height:1.35;word-break:break-word}
.kpi span{display:block;margin-top:6px;color:var(--muted);font-size:.82rem;line-height:1.55}
.empty-state{border:1px dashed var(--border);border-radius:14px;background:var(--surface-soft);padding:22px;text-align:center;color:var(--muted);line-height:1.8}
.extras{margin-bottom:18px}
.extras-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mini-list{display:grid;gap:12px}
.mini-item{border:1px solid var(--border);border-radius:14px;background:var(--card-grad);padding:16px}
.mini-item strong{display:block;color:var(--text);font-size:1rem;line-height:1.35}
.mini-item span{display:block;margin-top:7px;color:var(--muted);line-height:1.62;font-size:.84rem}
.formula-board{display:grid;gap:10px}
.formula-row{border:1px solid var(--border);border-radius:20px;background:var(--card-grad);padding:14px}
.formula-row small{display:block;color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-weight:800}
.formula-row strong{display:block;color:var(--text);font-size:.96rem;line-height:1.5;word-break:break-word}
.formula-row span{display:block;margin-top:6px;color:var(--muted);font-size:.8rem;line-height:1.45}
.guide{padding-bottom:28px}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.guide-card{border:1px solid var(--border);background:var(--surface);border-radius:14px;box-shadow:var(--shadow-soft);padding:18px}
.guide-card h3{margin:0 0 8px;color:var(--text);font-size:1.02rem}
.guide-card p{margin:0;color:var(--muted);line-height:1.75;font-size:.9rem}
.hidden-file{display:none !important}
@media (max-width:1280px){
.hero-grid,.tool-grid,.extras-grid{grid-template-columns:1fr}
.guide-grid{grid-template-columns:1fr}
.right-stack{position:static;top:auto}
}
@media (max-width:980px){
.top-tools{grid-template-columns:1fr 1fr}
.control-bar,.sub-grid,.field-grid,.kpi-grid,.ai-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
.hero,.main-tool,.extras,.guide{padding:0 12px}
.hero-grid{padding:20px}
.hero-mini-grid{grid-template-columns:1fr}
.top-tools{grid-template-columns:1fr}
.tool-body{padding:16px}
.tool-head{padding:18px 16px 14px}
.snippet-top{flex-direction:column}
}

/* page overrides */
.tool-app{--surface:var(--zl-surface);--surface-2:var(--zl-surface-2);--surface-3:var(--zl-surface-2);--surface-soft:var(--zl-surface-2);--surface-strong:var(--zl-surface);--accent-soft:var(--zl-tint);--border:var(--zl-line);--border-strong:var(--zl-line-2);--input-border:var(--zl-line-2);--input-bg:var(--zl-surface);--input-text:var(--zl-ink);--text:var(--zl-ink);--muted:var(--zl-muted);--chip:var(--zl-tint);--chip-bg:var(--zl-tint);--code-bg:var(--zl-surface);--preview-bg:var(--zl-surface-2)}
/* text expander: Option C */
.tool-app{--card-grad:var(--zl-surface);--panel:var(--zl-surface);--border:var(--zl-line);--border-strong:var(--zl-line-2);--chip-text:var(--zl-ink)}
.tool-app .main-tool,.tool-app .extras{padding:0;max-width:none}
.tool-app .main-tool{margin-top:12px}
.tool-app .te-stats{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:12px}
.tool-app .te-stat{border:1px solid var(--zl-line);border-radius:16px;background:var(--zl-surface-2);padding:12px 16px;display:grid;gap:2px;min-width:0}
.tool-app .te-stat small{font:500 13px var(--zl-font-head);color:var(--zl-muted)}
.tool-app .te-stat strong{font:600 20px var(--zl-font-head);color:var(--zl-ink);overflow-wrap:anywhere}
.tool-app .te-stat span{font-size:13.5px;color:var(--zl-muted)}
.tool-app .tool-shell{box-shadow:none;border-color:var(--zl-line);border-radius:18px}
.tool-app .tool-head{background:var(--zl-surface-2)}
.tool-app .panel{background:var(--zl-surface);border-color:var(--zl-line);border-radius:16px}
.tool-app .panel-headline strong{font:600 16px var(--zl-font-head)}
.tool-app .tool-btn,.tool-app .tool-btn-ghost,.tool-app .tool-btn-primary,.tool-app .tool-btn-danger,.tool-app .helper-chip,.tool-app .mini-btn{border-radius:999px;font:500 14.5px var(--zl-font-head);box-shadow:none;min-height:44px}
.tool-app .tool-btn,.tool-app .tool-btn-ghost,.tool-app .helper-chip,.tool-app .mini-btn{background:var(--zl-surface);border:1.5px solid var(--zl-line-2);color:var(--zl-ink)}
.tool-app .tool-btn-primary{background:var(--zl-accent);color:var(--zl-accent-ink);border:0;font-weight:600}
.tool-app .tool-btn-primary:hover{background:var(--zl-accent-strong)}
.tool-app .tool-btn-danger{background:var(--zl-surface);color:var(--zl-danger);border:1.5px solid color-mix(in srgb,var(--zl-danger) 45%,transparent)}
.tool-app .tool-btn:hover,.tool-app .tool-btn-ghost:hover,.tool-app .tool-btn-primary:hover,.tool-app .tool-btn-danger:hover,.tool-app .helper-chip:hover{transform:none}
.tool-app .tool-btn:hover,.tool-app .tool-btn-ghost:hover,.tool-app .helper-chip:hover{border-color:var(--zl-accent)}
.tool-app input.te-search{width:100%;min-height:46px;padding:0 16px;border-radius:999px;font:400 15.5px var(--zl-font-body);cursor:text}
.tool-app .result-card{border-color:var(--zl-line);box-shadow:none}
.tool-app .result-card.highlight{background:var(--zl-tint);border-color:var(--zl-line-2)}
.tool-app .result-card small,.tool-app .formula-row small{text-transform:none;letter-spacing:0;font:500 13px var(--zl-font-head);color:var(--zl-muted)}
.tool-app .extras-grid{grid-template-columns:1fr}
.tool-app #aiResultCard.is-error{border-color:color-mix(in srgb,var(--zl-danger) 40%,transparent);background:var(--zl-danger-soft)}
.tool-app #aiResultCard.is-error strong{color:var(--zl-danger)}
@media (max-width:760px){.tool-app .te-stats{grid-template-columns:1fr 1fr}.tool-app .te-stats .te-stat:first-child{grid-column:1/-1}}
.tool-app .control-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tool-app .control-bar select{flex:1 1 220px;min-width:0;min-height:44px;width:auto}
.tool-app .kpi small{text-transform:none;letter-spacing:0;font:500 13px var(--zl-font-head);color:var(--zl-muted)}
.tool-app .tool-shell{background:var(--zl-surface)}