/* ToolKit Online - responsive multi-template stylesheet */

/* ---------- tokens ---------- */
:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #f1f4fa;
  --text: #16202f;
  --muted: #5b6880;
  --line: #e2e7f0;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #e8efff;
  --ok: #0f9d58;
  --warn: #d97706;
  --danger: #dc2626;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 8px 28px rgba(19, 32, 62, .09);
  --shadow-lg: 0 18px 48px rgba(19, 32, 62, .14);
  --max: 1200px;
  --font: "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* category accents */
.cat-finance { --accent: #0f9d58; --accent-dark: #087443; --accent-soft: #e7f6ee; }
.cat-date    { --accent: #4f46e5; --accent-dark: #3b34bf; --accent-soft: #eceafe; }
.cat-text    { --accent: #9333ea; --accent-dark: #7a22c9; --accent-soft: #f4e9fd; }
.cat-convert { --accent: #0891b2; --accent-dark: #0b6f8c; --accent-soft: #e3f6fb; }
.cat-math    { --accent: #ea580c; --accent-dark: #c2450a; --accent-soft: #ffeede; }
.cat-health  { --accent: #e11d48; --accent-dark: #b3143a; --accent-soft: #ffe9ee; }
.cat-student { --accent: #2563eb; --accent-dark: #1d4ed8; --accent-soft: #e8efff; }
.cat-home    { --accent: #b45309; --accent-dark: #92400e; --accent-soft: #fdf1e2; }
.cat-business{ --accent: #0d9488; --accent-dark: #0f766e; --accent-soft: #e2f7f5; }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

img { max-width: 100%; height: auto; }
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: 0 0 1rem; }

h1, h2, h3, h4 {
  line-height: 1.28;
  margin: 1.6rem 0 .7rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(1.7rem, 4.2vw, 2.6rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h3 { font-size: 1.12rem; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 18px; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.center { text-align: center; }
.hide { display: none !important; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border: 0; border-radius: 10px; cursor: pointer;
  font: 600 15px/1 var(--font); transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 16px rgba(0, 0, 0, .14); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-ghost { background: var(--surface-2); color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { background: #e6ebf5; }
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 8px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.12rem; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand span.badge {
  background: var(--accent); color: #fff; border-radius: 9px; padding: 6px 8px;
  font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
}
.nav { margin-left: auto; }
.nav ul { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav a {
  display: block; padding: 9px 12px; border-radius: 9px; font-size: .93rem;
  font-weight: 600; color: var(--text);
}
.nav a:hover { background: var(--accent-soft); color: var(--accent-dark); text-decoration: none; }
.nav li.drop { position: relative; }
.nav li.drop > ul {
  display: none; position: absolute; top: 100%; left: 0; min-width: 240px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-lg); padding: 8px; flex-direction: column; gap: 2px;
}
.nav li.drop:hover > ul { display: flex; }
.nav li.drop > ul a { font-weight: 500; font-size: .9rem; }
.nav-toggle {
  margin-left: auto; background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 12px; cursor: pointer; font-size: 18px; line-height: 1; display: none;
}

/* ---------- hero ---------- */
.hero { padding: 34px 0 12px; }
.hero .eyebrow {
  display: inline-block; font-size: .75rem; font-weight: 800; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent-dark); background: var(--accent-soft);
  padding: 5px 11px; border-radius: 999px; margin-bottom: 12px;
}
.hero h1 { margin-top: 0; }
.hero .lede { font-size: 1.08rem; color: var(--muted); max-width: 70ch; }
.crumbs { font-size: .84rem; color: var(--muted); padding: 14px 0 0; }
.crumbs a { color: var(--muted); }
.crumbs .sep { margin: 0 6px; opacity: .6; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 30px; padding: 22px 0 56px; align-items: start; }
.layout > article { min-width: 0; }
.sidebar { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 18px; }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 22px; margin: 0 0 22px;
}
.card.tight { padding: 18px; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }
.card-title { font-size: .8rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-dark); margin-bottom: 12px; }

/* ---------- tool box ---------- */
.tool-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden; margin: 0 0 22px;
}
.tool-head {
  background: linear-gradient(120deg, var(--accent), var(--accent-dark)); color: #fff;
  padding: 14px 22px; font-weight: 700; display: flex; align-items: center; gap: 10px;
  font-size: .98rem; letter-spacing: .01em;
}
.tool-body { padding: 22px; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label { font-size: .84rem; font-weight: 700; color: #2c3a52; }
.input-wrap { display: flex; align-items: stretch; border: 1px solid var(--line); border-radius: 10px; background: var(--surface-2); overflow: hidden; }
.input-wrap:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input-wrap .pfx, .input-wrap .sfx {
  display: flex; align-items: center; padding: 0 10px; background: #e8ecf5; color: var(--muted);
  font-size: .82rem; font-weight: 700; white-space: nowrap;
}
.input-wrap input, .input-wrap select {
  flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; padding: 11px 12px;
  font: 600 15px/1.4 var(--font); color: var(--text);
}
textarea, input[type="text"].plain, input[type="search"].plain {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 12px;
  font: 400 15px/1.6 var(--font); background: var(--surface-2); color: var(--text); resize: vertical;
}
textarea:focus, .plain:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.hint { font-size: .78rem; color: var(--muted); margin: 0; }
fieldset.fgroup { border: 1px dashed var(--line); border-radius: 12px; padding: 14px; margin: 0; }
fieldset.fgroup legend { font-size: .8rem; font-weight: 800; color: var(--accent-dark); padding: 0 6px; }
.checkline { display: flex; align-items: center; gap: 8px; font-size: .9rem; font-weight: 600; }
.checkline input { width: 17px; height: 17px; accent-color: var(--accent); }
.tool-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.range-row { display: flex; align-items: center; gap: 12px; }
input[type="range"] { flex: 1; accent-color: var(--accent); }

/* results */
.result-panel { border-top: 1px dashed var(--line); padding: 20px; background: var(--surface-2); }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; }
.kpi {
  background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 12px; padding: 14px 16px;
}
.kpi.good { border-left-color: var(--ok); }
.kpi.warn { border-left-color: var(--warn); }
.kpi.info { border-left-color: var(--accent); }
.kpi .k-label { font-size: .75rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.kpi .k-value { font-size: 1.42rem; font-weight: 800; line-height: 1.25; word-break: break-word; }
.kpi .k-sub { font-size: .82rem; color: var(--muted); }
.result-html { margin-top: 16px; }
.result-note { margin-top: 12px; font-size: .85rem; color: var(--muted); }
table.data { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.data th, table.data td { border-bottom: 1px solid var(--line); padding: 9px 10px; text-align: right; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data th { background: var(--surface-2); color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; }
.scroll-x { overflow-x: auto; max-height: 420px; overflow-y: auto; }
.copy-btn { margin-left: 8px; }

/* text tool layout */
.text-split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.text-split textarea { min-height: 190px; }
.stat-strip { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.stat-pill { background: var(--accent-soft); color: var(--accent-dark); border-radius: 999px; padding: 6px 14px; font-weight: 700; font-size: .88rem; }
.out-box { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px; min-height: 120px; font-family: var(--mono); font-size: 14px; white-space: pre-wrap; word-break: break-word; }
.rows-list > div { display: flex; gap: 10px; margin-bottom: 10px; align-items: center; }
.rows-list > div > *:first-child { flex: 1; }
.rows-list input, .rows-list select { padding: 9px 10px; border: 1px solid var(--line); border-radius: 9px; font: 500 15px var(--font); background: var(--surface-2); }
.mt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; font-size: .9rem; }
.mt-grid div { background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; }
.bar { height: 10px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--accent); }
.verdict { font-weight: 800; }
.verdict.ok { color: var(--ok); }
.verdict.bad { color: var(--danger); }

/* ---------- article content ---------- */
.prose ul, .prose ol { padding-left: 1.25rem; }
.prose li { margin-bottom: .45rem; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding-left: 42px; margin-bottom: 14px; counter-increment: s; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-dark); font-weight: 800; font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
}
.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { position: relative; padding-left: 26px; margin-bottom: 8px; }
.checklist li::before { content: "\2713"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
.tipbox { background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 0 12px 12px 0; padding: 14px 18px; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 1.02rem; }
.faq details[open] summary { color: var(--accent-dark); }
.faq p { margin: .6rem 0 0; }
.formula { font-family: var(--mono); background: var(--surface-2); border: 1px solid var(--line); padding: 10px 14px; border-radius: 10px; font-size: .9rem; overflow-x: auto; }

/* ---------- link blocks ---------- */
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.link-card {
  display: block; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface); font-weight: 700; font-size: .95rem; color: var(--text); transition: .15s;
}
.link-card:hover { border-color: var(--accent); background: var(--accent-soft); text-decoration: none; transform: translateY(-2px); }
.link-card small { display: block; font-weight: 500; color: var(--muted); font-size: .8rem; margin-top: 3px; }
.side-list { list-style: none; margin: 0; padding: 0; }
.side-list li { border-bottom: 1px solid var(--line); }
.side-list li:last-child { border-bottom: 0; }
.side-list a { display: block; padding: 9px 0; font-size: .92rem; font-weight: 600; color: var(--text); }
.side-list a:hover { color: var(--accent-dark); }
.promo { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; border-radius: var(--radius-lg); padding: 20px; }
.promo a { color: #fff; text-decoration: underline; }

/* ---------- footer ---------- */
.site-footer { background: #101827; color: #cbd5e1; padding: 42px 0 24px; font-size: .9rem; }
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 24px; }
.site-footer h4 { color: #fff; font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; margin: 0 0 10px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 6px; }
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.foot-bottom { border-top: 1px solid #1f2a3c; margin-top: 26px; padding-top: 18px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }
.to-top { background: var(--accent); color: #fff; border: 0; border-radius: 999px; padding: 8px 16px; cursor: pointer; font-weight: 700; }

/* ---------- home page ---------- */
.home-search { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 8px; }
.home-search input { flex: 1; min-width: 240px; }
.cat-section { padding: 8px 0 4px; }
.cat-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.cat-head h2 { margin-bottom: 4px; }
.featured-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; text-align: center; }
.stat-row b { display: block; font-size: 1.6rem; color: var(--accent-dark); }

/* ---------- template variants ---------- */

/* B - centered single column */
.tpl-b .layout { grid-template-columns: minmax(0, 820px); justify-content: center; }
.tpl-b .hero { text-align: center; }
.tpl-b .hero .lede { margin: 0 auto; }
.tpl-b .crumbs { text-align: center; }
.tpl-b .sidebar { position: static; }
.tpl-b .side-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.tpl-b .tool-head { justify-content: center; font-size: 1.05rem; letter-spacing: .04em; }

/* C - tool first + text columns */
.tpl-c .layout { grid-template-columns: minmax(0, 1fr); max-width: 980px; }
.tpl-c .dual-col { columns: 2; column-gap: 28px; }
.tpl-c .dual-col > * { break-inside: avoid; }
.tpl-c .tool-card { box-shadow: 0 24px 60px rgba(19, 32, 62, .16); }
.tpl-c .tool-body { padding: 26px; }

/* D - left sidebar, round soft look */
.tpl-d .layout { grid-template-columns: 300px minmax(0, 1fr); }
.tpl-d .side-main { order: 2; }
.tpl-d .sidebar { order: 1; top: 76px; }
.tpl-d .tool-card { border-radius: 28px; border: 2px solid var(--line); box-shadow: none; }
.tpl-d .tool-head { border-radius: 26px 26px 0 0; padding: 18px 26px; }
.tpl-d .tool-body { padding: 26px; }
.tpl-d .kpi { border-radius: 18px; }
.tpl-d h1 { font-size: clamp(1.8rem, 4.4vw, 2.9rem); }

/* E - horizontal input strip / magazine */
.tpl-e .layout { grid-template-columns: minmax(0, 1fr); max-width: 1060px; }
.tpl-e .tool-body { background: linear-gradient(180deg, #fff, var(--surface-2)); }
.tpl-e .tool-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.tpl-e .result-panel { background: var(--accent-soft); }
.tpl-e .kpi { background: rgba(255, 255, 255, .85); }
.tpl-e .crumbs + .hero { border-bottom: 3px solid var(--accent); }

/* F - floating card over hero */
.tpl-f .hero {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff;
  border-radius: 0 0 34px 34px; padding: 46px 0 120px; text-align: center;
}
.tpl-f .hero .lede, .tpl-f .hero h1 { color: #fff; }
.tpl-f .hero .eyebrow { background: rgba(255, 255, 255, .22); color: #fff; }
.tpl-f .hero a { color: #fff; }
.tpl-f .crumbs { color: rgba(255, 255, 255, .85); }
.tpl-f .crumbs a { color: rgba(255, 255, 255, .9); }
.tpl-f .layout { grid-template-columns: minmax(0, 1fr) 320px; margin-top: -80px; }
.tpl-f .tool-card { transform: translateY(0); }
.tpl-f .kpi { border-left-width: 5px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .tpl-d .layout { grid-template-columns: minmax(0, 1fr); }
  .tpl-d .side-main { order: 1; }
  .tpl-d .sidebar { order: 2; position: static; }
}
@media (max-width: 900px) {
  .layout, .tpl-f .layout { grid-template-columns: minmax(0, 1fr); margin-top: 0; }
  .sidebar { position: static; }
  .side-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
  .text-split { grid-template-columns: 1fr; }
  .tpl-c .dual-col { columns: 1; }
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--surface);
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow); padding: 10px 12px;
  }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav li.drop > ul { position: static; display: none; box-shadow: none; border: 0; padding-left: 10px; }
  .nav li.drop.open > ul { display: flex; }
  .tpl-f .hero { padding: 34px 0 70px; border-radius: 0 0 24px 24px; }
}
@media (max-width: 560px) {
  .tool-body, .result-panel, .card { padding: 16px; }
  .tool-grid { grid-template-columns: 1fr; }
  .kpi .k-value { font-size: 1.2rem; }
  .brand span.badge { display: none; }
  .foot-bottom { flex-direction: column; }
}

@media print {
  .site-header, .site-footer, .sidebar, .tool-actions, .link-grid { display: none !important; }
  .layout { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}