.tools-main { overflow: visible; padding-bottom: 64px; }
.tool-intro, .tool-workspace, .tool-notes { width: var(--page); margin: 0 auto; }
.tool-intro { padding: 32px 0 26px; }
.tool-intro h1 { max-width: 1000px; margin: 12px 0; font-size: clamp(30px, 4.2vw, 54px); line-height: 1.08; letter-spacing: -.045em; }
.tool-intro > p:last-child { margin: 0; max-width: 800px; font-size: 18px; line-height: 1.55; }
.tool-workspace { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: start; gap: 28px; }
.tool-form, .tool-result { min-width: 0; }
.tool-form { padding: 26px; background: #fff; border: 2px solid var(--ink); }
.tool-form h2, .tool-result h2 { margin: 0 0 18px; font-size: 23px; line-height: 1.2; letter-spacing: -.025em; }
.tool-form fieldset { border: 0; padding: 0; margin: 0 0 24px; min-width: 0; }
.tool-form legend { margin-bottom: 10px; padding: 0; font-size: 16px; font-weight: 800; }
.tool-segments { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tool-segment { display: flex; align-items: center; gap: 8px; padding: 13px 10px; border: 1px solid var(--ink); cursor: pointer; font-size: 15px; font-weight: 700; }
.tool-segment:has(input:checked) { background: var(--yellow); border-width: 2px; padding: 12px 9px; }
.tool-segment input { margin: 0; accent-color: var(--ink); flex-shrink: 0; }
.tool-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 16px; }
.tool-field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.tool-field-wide { grid-column: 1 / -1; }
.tool-field label { font-weight: 800; font-size: 16px; line-height: 1.4; }
.tool-field input, .tool-field select, .tool-url-output { width: 100%; min-width: 0; border: 1px solid #777; border-radius: 0; background: #fff; color: var(--ink); padding: 12px; font: 400 18px/1.4 Arial, sans-serif; }
.tool-field select { font-size: 16px; min-height: 50px; }
.tool-field input:focus-visible, .tool-field select:focus-visible, .tool-url-output:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
.tool-field input[aria-invalid="true"] { border: 2px solid #a51a1a; padding: 11px; }
.tool-hint { display: block; margin: 0; color: #56544e; font-size: 14px; line-height: 1.5; }
.tool-error { margin: 0; color: #9b1919; font-size: 14px; line-height: 1.45; }
.tool-details { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.tool-details summary, .tool-notes summary { cursor: pointer; font-size: 16px; font-weight: 800; line-height: 1.5; }
.tool-details[open] summary { margin-bottom: 14px; }
.tool-details > p { font-size: 14px; line-height: 1.5; }
.tool-form-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.tool-reset { border: 0; padding: 5px 0; background: none; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; font-size: 14px; }
.tool-local-note { margin: 20px 0 0; font-size: 14px; line-height: 1.55; color: #56544e; }
.tool-result { background: var(--yellow); border: 2px solid var(--ink); padding: 28px; box-shadow: 7px 7px 0 var(--ink); }
.tool-result-tag { display: inline-block; margin: 0 0 20px; padding: 5px 8px; border: 1px solid var(--ink); font-size: 13px; font-weight: 700; }
.tool-result-label { display: block; font-size: 17px; font-weight: 800; line-height: 1.4; }
.tool-result-number { display: block; margin: 10px 0; font-size: clamp(34px, 4.5vw, 66px); font-weight: 900; letter-spacing: -.055em; line-height: 1.08; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.tool-result-explanation { margin-bottom: 22px; font-size: 16px; line-height: 1.5; }
.tool-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin: 0; border-top: 1px solid var(--ink); }
.tool-metrics > div { padding: 17px 12px 17px 0; min-width: 0; border-bottom: 1px solid var(--ink); }
.tool-metrics dt { font-size: 14px; line-height: 1.45; }
.tool-metrics dd { margin: 7px 0 0; font-size: 24px; font-weight: 800; line-height: 1.2; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.tool-formula { margin: 20px 0 0; font-size: 14px; line-height: 1.6; }
.tool-warning { margin: 16px 0 0; background: #fff; border-left: 4px solid var(--ink); padding: 12px; font-size: 15px; line-height: 1.5; }
.tool-scenario { background: #fff; margin: 24px -28px -28px; padding: 24px 28px; border-top: 2px solid var(--ink); }
.tool-scenario h3 { font-size: 20px; }
.tool-scenario p { font-size: 15px; line-height: 1.6; }
.tool-status { font-size: 14px; line-height: 1.5; min-height: 1.5em; margin: 14px 0 0; }
.tool-result-invalid { background: #fff; font-size: 18px; line-height: 1.6; }
.tool-notes { padding-top: 40px; max-width: 1000px; }
.tool-notes h2 { font-size: 25px; line-height: 1.25; }
.tool-notes details { padding: 18px 0; border-top: 1px solid var(--line); }
.tool-notes details p { margin: 14px 0 0; font-size: 16px; line-height: 1.65; }
.tool-notes a { text-underline-offset: 3px; }
.tool-check { display: flex; align-items: start; gap: 10px; margin: 22px 0 0; font-size: 15px; line-height: 1.5; cursor: pointer; }
.tool-check input { flex-shrink: 0; width: 18px; height: 18px; margin: 2px 0; accent-color: var(--ink); }
.tool-url-output { display: block; resize: vertical; min-height: 180px; margin: 14px 0 20px; font: 15px/1.65 'Courier New', monospace; overflow-wrap: anywhere; }
.tool-copy { width: 100%; }
.tool-copy:disabled { cursor: not-allowed; opacity: .5; transform: none; box-shadow: none; }
.tool-utm-values { margin: 20px 0 0; }
.tool-utm-values > div { display: grid; grid-template-columns: 115px minmax(0, 1fr); gap: 12px; padding: 10px 0; border-top: 1px solid var(--ink); font-size: 14px; line-height: 1.5; }
.tool-utm-values dt { font-family: 'Courier New', monospace; }
.tool-utm-values dd { margin: 0; overflow-wrap: anywhere; font-weight: 700; }
.tools-main [hidden] { display: none !important; }
@media (max-width: 1000px) { .tool-workspace { gap: 18px; } .tool-form, .tool-result { padding: 20px; } .tool-scenario { margin: 24px -20px -20px; padding: 20px; } }
@media (max-width: 760px) { .tool-workspace { grid-template-columns: 1fr; gap: 24px; } .tool-intro { padding-top: 24px; } .tool-result { margin-right: 7px; } .tool-result-number { font-size: 48px; } }
@media (max-width: 420px) { .tool-fields { grid-template-columns: 1fr; } .tool-form, .tool-result { padding: 18px; } .tool-scenario { margin: 24px -18px -18px; padding: 18px; } .tool-segment { font-size: 14px; } .tool-metrics dd { font-size: 22px; } }