:root {
    --tools-bg: #070811;
    --tools-panel: rgba(16, 18, 33, .92);
    --tools-panel-soft: rgba(22, 24, 43, .72);
    --tools-border: rgba(157, 145, 255, .17);
    --tools-border-bright: rgba(144, 125, 255, .38);
    --tools-text: #f5f4ff;
    --tools-muted: #aaa9bd;
    --tools-purple: #8b7cff;
    --tools-purple-bright: #a99fff;
    --tools-green: #45d9a0;
    --tools-red: #ff7285;
    --tools-shadow: 0 24px 80px rgba(0, 0, 0, .3);
}

html { scroll-behavior: smooth; }
body.tools-page { background: var(--tools-bg); color: var(--tools-text); }
.tools-page .site-header { position: relative; z-index: 50; }
.tools-directory, .tool-detail { position: relative; overflow: hidden; background: radial-gradient(circle at 85% 5%, rgba(93, 74, 214, .13), transparent 26%), var(--tools-bg); min-height: 100vh; }
.tools-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; position: relative; z-index: 2; }
.tools-orb { position: absolute; border-radius: 999px; filter: blur(8px); pointer-events: none; opacity: .65; }
.tools-orb-one { width: 480px; height: 480px; top: -230px; right: -140px; background: radial-gradient(circle, rgba(129, 105, 255, .24), transparent 68%); }
.tools-orb-two { width: 400px; height: 400px; left: -220px; top: 240px; background: radial-gradient(circle, rgba(46, 198, 153, .12), transparent 68%); }

.tools-breadcrumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: #8f8da3; font-size: 13px; margin-bottom: 38px; }
.tools-breadcrumbs a { color: #bbb8ce; text-decoration: none; transition: color .2s ease; }
.tools-breadcrumbs a:hover { color: var(--tools-purple-bright); }
.tools-breadcrumbs i { font-size: 8px; opacity: .65; }
.tools-eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--tools-purple-bright); font-size: 12px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.tools-eyebrow i { color: var(--tools-green); }

.tools-hero { position: relative; padding: 58px 0 82px; border-bottom: 1px solid rgba(142, 131, 221, .12); }
.tools-hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 70px; }
.tools-hero h1 { max-width: 720px; margin: 17px 0 20px; color: var(--tools-text); font-size: clamp(40px, 5vw, 68px); line-height: 1.04; letter-spacing: -.045em; font-weight: 760; }
.tools-hero h1 em { color: var(--tools-purple-bright); font-style: normal; }
.tools-hero h1 + p { color: var(--tools-muted); max-width: 710px; font-size: 17px; line-height: 1.8; }
.tools-hero-stats { display: flex; gap: 34px; margin-top: 34px; }
.tools-hero-stats div { display: grid; gap: 3px; padding-right: 34px; border-right: 1px solid var(--tools-border); }
.tools-hero-stats div:last-child { border-right: 0; }
.tools-hero-stats strong { font-size: 25px; color: #fff; }
.tools-hero-stats span { color: #8f8da3; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }

.tools-search-panel { border: 1px solid var(--tools-border-bright); border-radius: 24px; padding: 28px; background: linear-gradient(145deg, rgba(28, 27, 52, .9), rgba(12, 14, 27, .9)); box-shadow: var(--tools-shadow); }
.tools-search-panel label > span { display: block; margin-bottom: 10px; color: #d8d5e7; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; }
.tools-search-panel label > div { display: flex; align-items: center; gap: 12px; min-height: 60px; padding: 0 16px; border: 1px solid rgba(157, 145, 255, .22); border-radius: 15px; background: rgba(6, 8, 17, .78); transition: border-color .2s ease, box-shadow .2s ease; }
.tools-search-panel label > div:focus-within { border-color: var(--tools-purple); box-shadow: 0 0 0 3px rgba(139, 124, 255, .14); }
.tools-search-panel label i { color: var(--tools-purple-bright); }
.tools-search-panel input { min-width: 0; flex: 1; border: 0; outline: 0; background: none; color: #fff; font: inherit; }
.tools-search-panel input::placeholder { color: #77758a; }
.tools-search-panel kbd { border: 1px solid rgba(255,255,255,.13); border-bottom-color: rgba(255,255,255,.25); border-radius: 6px; padding: 3px 7px; color: #89879b; background: rgba(255,255,255,.04); }
.tools-search-panel > p { margin: 13px 0 0; color: #89879a; font-size: 12px; }
.tools-popular { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; }
.tools-popular span { color: #88869a; font-size: 12px; }
.tools-popular a { border: 1px solid rgba(157,145,255,.18); border-radius: 999px; padding: 6px 10px; color: #c7c3dc; text-decoration: none; font-size: 11px; transition: all .2s ease; }
.tools-popular a:hover { color: #fff; border-color: var(--tools-purple); background: rgba(139,124,255,.1); }

.tools-directory-body { padding: 44px 0 100px; }
.tools-category-nav { position: sticky; top: 14px; z-index: 30; display: flex; gap: 7px; overflow-x: auto; scrollbar-width: none; padding: 10px; margin-bottom: 68px; border: 1px solid var(--tools-border); border-radius: 16px; background: rgba(9, 10, 21, .88); box-shadow: 0 12px 40px rgba(0,0,0,.22); backdrop-filter: blur(16px); }
.tools-category-nav::-webkit-scrollbar { display: none; }
.tools-category-nav button { flex: 0 0 auto; border: 0; border-radius: 10px; padding: 10px 14px; color: #aaa7bc; background: transparent; font: inherit; font-size: 12px; font-weight: 600; cursor: pointer; transition: all .2s ease; }
.tools-category-nav button:hover { color: #fff; background: rgba(255,255,255,.05); }
.tools-category-nav button.active { color: #fff; background: linear-gradient(135deg, #725fff, #8d7eff); box-shadow: 0 7px 20px rgba(114,95,255,.24); }
.tools-category { margin-bottom: 84px; scroll-margin-top: 100px; }
.tools-category[hidden] { display: none; }
.tools-category-header { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; max-width: 820px; margin-bottom: 28px; }
.tools-category-icon { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid rgba(139,124,255,.3); border-radius: 14px; color: var(--tools-purple-bright); background: rgba(139,124,255,.1); }
.tools-category-header span { color: var(--tools-green); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.tools-category-header h2 { margin: 3px 0 7px; color: #fff; font-size: 29px; letter-spacing: -.025em; }
.tools-category-header p { color: var(--tools-muted); line-height: 1.65; font-size: 14px; }
.tools-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.tool-card { display: flex; flex-direction: column; min-height: 315px; padding: 25px; border: 1px solid var(--tools-border); border-radius: 20px; color: inherit; background: linear-gradient(155deg, rgba(23, 24, 42, .86), rgba(12, 14, 26, .9)); text-decoration: none; box-shadow: 0 12px 30px rgba(0,0,0,.13); transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease; }
.tool-card:hover { transform: translateY(-5px); border-color: var(--tools-border-bright); box-shadow: 0 22px 48px rgba(0,0,0,.26); }
.tool-card[hidden] { display: none; }
.tool-card-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 17px; }
.tool-card-top span { color: var(--tools-green); font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.tool-card-top i { transform: rotate(45deg); color: #777489; font-size: 12px; transition: all .25s ease; }
.tool-card:hover .tool-card-top i { transform: rotate(45deg) translateY(-3px); color: var(--tools-purple-bright); }
.tool-card h3 { margin: 0 0 11px; color: #f5f3ff; font-size: 19px; line-height: 1.32; letter-spacing: -.018em; }
.tool-card > p { margin: 0; color: #9997aa; font-size: 13px; line-height: 1.65; }
.tool-card-formula { margin: auto 0 18px; padding-top: 22px; }
.tool-card-formula small { display: block; color: #6f6d80; font-size: 9px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 7px; }
.tool-card-formula code { display: block; overflow: hidden; padding: 10px 12px; border-radius: 9px; color: #c6c2d7; background: rgba(255,255,255,.045); font-size: 10px; white-space: nowrap; text-overflow: ellipsis; }
.tool-card > strong { color: #bbb4ff; font-size: 12px; font-weight: 700; }
.tool-card > strong i { margin-left: 5px; transition: transform .2s ease; }
.tool-card:hover > strong i { transform: translateX(4px); }
.tool-card.compact { min-height: 220px; }
.tool-card.compact > p { margin-bottom: 24px; }
.tool-card.compact > strong { margin-top: auto; }
.tools-empty { text-align: center; padding: 80px 20px; }
.tools-empty i { color: var(--tools-purple); font-size: 30px; }
.tools-empty h2 { margin: 15px 0 5px; }
.tools-empty p { color: var(--tools-muted); }
.tools-empty button { border: 1px solid var(--tools-border-bright); border-radius: 10px; padding: 10px 16px; color: #fff; background: rgba(139,124,255,.12); cursor: pointer; }
.tools-directory-note { display: flex; gap: 18px; padding: 26px; border: 1px solid rgba(69,217,160,.22); border-radius: 18px; background: rgba(69,217,160,.055); }
.tools-directory-note > i { color: var(--tools-green); font-size: 21px; margin-top: 3px; }
.tools-directory-note h2 { margin: 0 0 7px; font-size: 17px; }
.tools-directory-note p { margin: 0; color: #9c9aad; font-size: 13px; line-height: 1.7; }

.tool-detail-hero { position: relative; padding: 48px 0 56px; border-bottom: 1px solid var(--tools-border); }
.tool-title-row { display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.tool-title-row h1 { margin: 15px 0 13px; color: #fff; font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: -.04em; }
.tool-title-row p { max-width: 790px; color: var(--tools-muted); font-size: 16px; line-height: 1.75; }
.tool-back-link { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 9px; border: 1px solid var(--tools-border); border-radius: 12px; padding: 11px 15px; color: #c6c2d9; text-decoration: none; font-size: 12px; transition: all .2s ease; }
.tool-back-link:hover { color: #fff; border-color: var(--tools-purple); background: rgba(139,124,255,.1); }
.tool-detail-shell { padding: 48px 0 100px; }

.calculator-panel { border: 1px solid var(--tools-border-bright); border-radius: 25px; background: linear-gradient(150deg, rgba(18,20,35,.97), rgba(10,12,23,.97)); box-shadow: var(--tools-shadow); overflow: hidden; }
.calculator-panel-heading { display: flex; justify-content: space-between; gap: 30px; align-items: center; padding: 26px 30px; border-bottom: 1px solid var(--tools-border); }
.calculator-panel-heading span, .calculator-column-label span { color: var(--tools-green); font-size: 10px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.calculator-panel-heading h2 { margin: 4px 0; color: #fff; font-size: 22px; }
.calculator-panel-heading p { margin: 0; color: #858396; font-size: 12px; }
.calculator-actions { display: flex; gap: 8px; }
.calculator-actions button { border: 1px solid var(--tools-border); border-radius: 10px; padding: 9px 12px; color: #aaa7bb; background: rgba(255,255,255,.025); cursor: pointer; font: inherit; font-size: 11px; }
.calculator-actions button:hover { color: #fff; border-color: var(--tools-border-bright); }
.calculator-actions i { margin-right: 5px; }
.calculator-grid { display: grid; grid-template-columns: 1fr 1fr; }
.calculator-inputs, .calculator-results { min-width: 0; padding: 30px; }
.calculator-inputs { border-right: 1px solid var(--tools-border); }
.calculator-results { background: rgba(5,7,15,.3); }
.calculator-column-label { display: flex; justify-content: space-between; align-items: center; padding-bottom: 15px; margin-bottom: 25px; border-bottom: 1px solid var(--tools-border); }
.calculator-column-label small { color: #6f6d80; font-size: 10px; }
.calculator-field { display: block; margin-bottom: 20px; }
.calculator-field > span { display: block; color: #e7e5ef; font-size: 13px; font-weight: 600; }
.calculator-field > small { display: block; color: #858295; font-size: 10px; margin: 3px 0 8px; }
.calculator-control { display: flex; align-items: center; min-height: 49px; border: 1px solid rgba(255,255,255,.12); border-radius: 11px; padding: 0 13px; background: rgba(255,255,255,.035); transition: border-color .2s ease, box-shadow .2s ease; }
.calculator-control:focus-within { border-color: var(--tools-purple); box-shadow: 0 0 0 3px rgba(139,124,255,.1); }
.calculator-control > span { color: #aaa7ba; font-size: 12px; }
.calculator-control input, .calculator-control select { min-width: 0; width: 100%; border: 0; outline: 0; padding: 0 10px; color: #fff; background: transparent; font: inherit; font-size: 14px; }
.calculator-control input:first-child { padding-left: 0; }
.calculator-control input:last-child { padding-right: 0; }
.calculator-control select { appearance: none; cursor: pointer; }
.calculator-control select option { color: #111; }
.select-control { position: relative; }
.select-control i { position: absolute; right: 14px; color: #77758a; font-size: 9px; pointer-events: none; }
.calculator-field textarea { width: 100%; border: 1px solid rgba(255,255,255,.12); border-radius: 11px; padding: 12px 13px; color: #fff; background: rgba(255,255,255,.035); outline: 0; resize: vertical; font: 12px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace; }
.calculator-field textarea:focus { border-color: var(--tools-purple); box-shadow: 0 0 0 3px rgba(139,124,255,.1); }
.calculator-privacy { margin: 26px 0 0; color: #727083; font-size: 10px; text-align: center; }
.calculator-privacy i { color: var(--tools-green); margin-right: 5px; }
.calculator-result { display: flex; align-items: baseline; justify-content: space-between; gap: 15px; min-height: 52px; margin-bottom: 10px; padding: 14px 16px; border-radius: 11px; background: rgba(255,255,255,.035); }
.calculator-result > span { color: #aaa7b9; font-size: 12px; }
.calculator-result strong { margin-left: auto; color: #f6f4ff; font-size: 16px; text-align: right; overflow-wrap: anywhere; }
.calculator-result strong.negative-result { color: var(--tools-red); }
.calculator-result > small { color: #888596; font-size: 10px; }
.calculator-result.primary { display: block; min-height: 142px; padding: 26px; margin-bottom: 20px; border: 1px solid rgba(69,217,160,.2); background: linear-gradient(145deg, rgba(29,111,83,.16), rgba(15,55,44,.13)); text-align: center; }
.calculator-result.primary > span { display: block; margin-bottom: 9px; color: var(--tools-green); font-size: 10px; letter-spacing: .13em; text-transform: uppercase; }
.calculator-result.primary strong { display: block; color: var(--tools-green); font-size: clamp(32px, 4vw, 48px); line-height: 1.12; }
.calculator-result.primary strong.negative-result { color: var(--tools-red); }
.calculator-result.primary > small { display: block; margin-top: 5px; }
.calculator-breakdown { padding-top: 20px; margin-top: 24px; border-top: 1px solid var(--tools-border); }
.calculator-chart { margin-top: 20px; padding: 15px; border: 1px solid var(--tools-border); border-radius: 12px; background: rgba(255,255,255,.025); }
.calculator-chart > span { display: block; margin-bottom: 10px; color: #777487; font-size: 9px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.calculator-chart canvas { display: block; width: 100%; height: 230px; }
.calculator-breakdown > span { color: #777487; font-size: 9px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.calculator-breakdown pre { margin: 10px 0 0; padding: 15px; border-radius: 11px; color: #c4c0d3; background: rgba(255,255,255,.035); font: 11px/1.75 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.calculator-error { margin: 12px 0 0; padding: 10px 12px; border: 1px solid rgba(255,114,133,.25); border-radius: 9px; color: #ff9aaa; background: rgba(255,114,133,.07); font-size: 11px; }
.calculator-noscript { margin: 0; padding: 16px 30px; color: #ffbe7a; background: rgba(255,178,84,.08); }

.tool-content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 56px; align-items: start; margin-top: 76px; }
.tool-article { min-width: 0; }
.tool-toc { position: sticky; top: 20px; display: grid; gap: 6px; padding: 18px; border: 1px solid var(--tools-border); border-radius: 14px; background: rgba(15,17,30,.72); }
.tool-toc strong { padding: 2px 8px 9px; color: #fff; font-size: 12px; }
.tool-toc a { border-radius: 8px; padding: 8px; color: #8f8da0; text-decoration: none; font-size: 11px; transition: all .2s ease; }
.tool-toc a:hover { color: #fff; background: rgba(139,124,255,.1); }
.tool-content-section { scroll-margin-top: 30px; padding-bottom: 66px; margin-bottom: 66px; border-bottom: 1px solid var(--tools-border); }
.tool-content-section:last-child { border-bottom: 0; }
.section-kicker, .section-heading > span { color: var(--tools-green); font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.tool-content-section h2, .section-heading h2 { margin: 7px 0 20px; color: #fff; font-size: clamp(26px, 3vw, 36px); letter-spacing: -.025em; }
.tool-content-section h3 { margin: 25px 0 11px; color: #eeecf7; font-size: 18px; }
.tool-content-section > p { margin: 0 0 18px; color: #aaa8b9; font-size: 14px; line-height: 1.9; }
.tool-content-section strong { color: #eeebf8; }
.content-callout { display: flex; gap: 16px; margin-top: 28px; padding: 20px; border: 1px solid rgba(69,217,160,.2); border-radius: 14px; background: rgba(69,217,160,.055); }
.content-callout > i { color: var(--tools-green); margin-top: 3px; }
.content-callout strong { display: block; margin-bottom: 5px; font-size: 13px; }
.content-callout p { margin: 0; color: #9d9bac; font-size: 12px; line-height: 1.7; }
.content-callout.warning { border-color: rgba(255,183,94,.22); background: rgba(255,183,94,.06); }
.content-callout.warning > i { color: #ffbd70; }
.tool-input-table { overflow-x: auto; margin: 28px 0; border: 1px solid var(--tools-border); border-radius: 14px; }
.tool-input-table table { width: 100%; border-collapse: collapse; min-width: 630px; }
.tool-input-table th, .tool-input-table td { padding: 14px 16px; border-bottom: 1px solid var(--tools-border); text-align: left; }
.tool-input-table tr:last-child td { border-bottom: 0; }
.tool-input-table th { color: #858296; background: rgba(255,255,255,.025); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.tool-input-table td { color: #aaa8ba; font-size: 12px; line-height: 1.55; }
.tool-input-table td:first-child { color: #eeecf7; font-weight: 600; }
.calculation-steps { list-style: none; padding: 0; margin: 36px 0 0; }
.calculation-steps li { display: grid; grid-template-columns: 38px 1fr; gap: 16px; margin-bottom: 22px; }
.calculation-steps li > span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid rgba(139,124,255,.3); border-radius: 10px; color: var(--tools-purple-bright); background: rgba(139,124,255,.09); font-size: 11px; font-weight: 700; }
.calculation-steps h3 { margin: 0 0 4px; font-size: 14px; }
.calculation-steps p { margin: 0; color: #9391a3; font-size: 12px; line-height: 1.7; }
.formula-display { margin: 27px 0; padding: 24px; border: 1px solid var(--tools-border-bright); border-radius: 15px; background: linear-gradient(145deg, rgba(139,124,255,.09), rgba(69,217,160,.035)); }
.formula-display small { display: block; margin-bottom: 10px; color: var(--tools-green); font-size: 9px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.formula-display code { color: #eeeaff; font: 14px/1.7 ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }
.formula-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 28px; }
.formula-notes div { padding: 17px; border: 1px solid var(--tools-border); border-radius: 12px; background: rgba(255,255,255,.025); }
.formula-notes span { color: var(--tools-purple-bright); font-size: 10px; font-weight: 700; }
.formula-notes p { margin: 8px 0 0; color: #9794a7; font-size: 11px; line-height: 1.65; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; margin: 28px 0; }
.scenario-grid article { padding: 20px; border: 1px solid var(--tools-border); border-radius: 14px; background: rgba(255,255,255,.025); }
.scenario-grid span { color: var(--tools-green); font-size: 9px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.scenario-grid h3 { margin: 7px 0 9px; font-size: 15px; }
.scenario-grid p { margin: 0; color: #9693a5; font-size: 11px; line-height: 1.7; }
.use-case-list { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin: 28px 0 36px; }
.use-case-list > div { padding: 20px; border: 1px solid var(--tools-border); border-radius: 14px; background: rgba(255,255,255,.022); }
.use-case-list i { color: var(--tools-purple-bright); }
.use-case-list h3 { margin: 12px 0 7px; font-size: 14px; }
.use-case-list p { margin: 0; color: #9491a4; font-size: 11px; line-height: 1.7; }
.mistake-list { display: grid; gap: 10px; margin: 28px 0; }
.mistake-list > div { display: grid; grid-template-columns: 32px 1fr; gap: 12px; padding: 15px; border: 1px solid var(--tools-border); border-radius: 11px; background: rgba(255,255,255,.02); }
.mistake-list span { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 8px; color: #ff9aaa; background: rgba(255,114,133,.09); font-size: 10px; font-weight: 700; }
.mistake-list p { margin: 1px 0 0; color: #9895a8; font-size: 12px; line-height: 1.65; }
.tool-faq details { border-bottom: 1px solid var(--tools-border); }
.tool-faq summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 19px 0; color: #e8e6f0; cursor: pointer; font-size: 13px; font-weight: 600; list-style: none; }
.tool-faq summary::-webkit-details-marker { display: none; }
.tool-faq summary i { color: var(--tools-purple-bright); transition: transform .2s ease; }
.tool-faq details[open] summary i { transform: rotate(45deg); }
.tool-faq details p { margin: 0; padding: 0 35px 20px 0; color: #9693a6; font-size: 12px; line-height: 1.8; }

.related-tools { padding-top: 18px; margin-top: 30px; scroll-margin-top: 25px; }
.section-heading { max-width: 670px; margin-bottom: 28px; }
.section-heading h2 { margin-bottom: 8px; }
.section-heading p { color: #9290a2; font-size: 13px; }
.related-tools .tools-card-grid { grid-template-columns: repeat(4, 1fr); }
.tools-cta { display: flex; justify-content: space-between; align-items: center; gap: 50px; margin-top: 80px; padding: 36px; border: 1px solid var(--tools-border-bright); border-radius: 22px; background: linear-gradient(140deg, rgba(106,87,236,.17), rgba(39,132,102,.08)); }
.tools-cta span { color: var(--tools-green); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; }
.tools-cta h2 { margin: 7px 0; color: #fff; font-size: 28px; }
.tools-cta p { margin: 0; color: #9996a9; font-size: 12px; }
.tools-cta a { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 8px; border-radius: 11px; padding: 13px 18px; color: #fff; background: linear-gradient(135deg, #725fff, #8c7dff); text-decoration: none; font-size: 12px; font-weight: 700; box-shadow: 0 12px 30px rgba(114,95,255,.26); }

@media (max-width: 1050px) {
    .tools-card-grid { grid-template-columns: repeat(2, 1fr); }
    .related-tools .tools-card-grid { grid-template-columns: repeat(2, 1fr); }
    .tools-hero-grid { gap: 38px; }
    .tool-content-layout { grid-template-columns: 1fr; }
    .tool-toc { display: none; }
}

@media (max-width: 820px) {
    .tools-shell { width: min(100% - 28px, 1180px); }
    .tools-hero { padding-top: 38px; }
    .tools-hero-grid { grid-template-columns: 1fr; }
    .tools-search-panel { max-width: 620px; }
    .tool-title-row { align-items: start; flex-direction: column; gap: 22px; }
    .calculator-grid { grid-template-columns: 1fr; }
    .calculator-inputs { border-right: 0; border-bottom: 1px solid var(--tools-border); }
    .formula-notes, .scenario-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .tools-hero h1 { font-size: 39px; }
    .tools-hero-stats { gap: 17px; }
    .tools-hero-stats div { padding-right: 17px; }
    .tools-card-grid, .related-tools .tools-card-grid, .use-case-list { grid-template-columns: 1fr; }
    .tool-card { min-height: 285px; }
    .tools-category-nav { top: 8px; margin-bottom: 50px; }
    .tools-category-header { grid-template-columns: 1fr; }
    .calculator-panel-heading { align-items: flex-start; flex-direction: column; padding: 22px; }
    .calculator-actions { width: 100%; }
    .calculator-actions button { flex: 1; }
    .calculator-inputs, .calculator-results { padding: 22px; }
    .tool-detail-shell { padding-top: 28px; }
    .tool-content-layout { margin-top: 56px; }
    .tools-cta { align-items: flex-start; flex-direction: column; padding: 26px; }
    .tools-cta a { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .tool-card, .tool-card-top i, .tool-card > strong i { transition: none; }
}