.tools-shell { padding-top: 112px; padding-bottom: 8rem; min-height: calc(100vh - 100px); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .65rem; margin-bottom: 3rem; color: var(--muted); font: .7rem var(--mono); }
.breadcrumbs a:hover { color: var(--accent); }
.tools-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); }
.tools-sidebar { align-self: start; position: sticky; top: 110px; border-top: 1px solid var(--line); padding-top: 1.2rem; }
.sidebar-label { margin: 0 0 1rem; color: var(--muted); font: .7rem var(--mono); letter-spacing: .12em; }
.tools-sidebar nav { display: grid; gap: .25rem; }
.tools-sidebar a { display: block; padding: .75rem .85rem; border-left: 2px solid transparent; color: var(--muted); font-size: .85rem; }
.tools-sidebar a:hover, .tools-sidebar a[aria-current] { border-color: var(--accent); color: var(--text); background: var(--bg-soft); }
.tools-content { min-width: 0; }
.tools-content h1 { margin: 0; font-size: clamp(3.2rem, 7vw, 6rem); line-height: .98; letter-spacing: -.065em; }
.tools-content h1 span, .accent-dot { color: var(--accent); }
.tools-lede { max-width: 720px; margin: 1.7rem 0 3rem; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); }
.tool-card { display: grid; gap: 1rem; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid var(--line); background: var(--panel); }
.tool-card:hover { border-color: var(--accent); }
.tool-card-meta { color: var(--accent); font: .7rem var(--mono); letter-spacing: .1em; }
.tool-card strong { display: flex; justify-content: space-between; gap: 1rem; font-size: clamp(1.5rem, 3vw, 2.5rem); line-height: 1.15; letter-spacing: -.045em; }
.tool-card > span:last-child { color: var(--muted); }
.formatter-form, .result-section { margin-top: 2.5rem; }
.form-heading { display: flex; gap: 1rem; align-items: baseline; margin: 2.4rem 0 1rem; border-bottom: 1px solid var(--line); }
.form-heading span { color: var(--accent); font: .7rem var(--mono); }
.form-heading h2 { margin: 0 0 .7rem; font-size: 1.35rem; letter-spacing: -.04em; }
.formatter-form > label { display: block; margin-bottom: .65rem; font-size: .85rem; font-weight: 700; }
.formatter-form textarea, #formatted-output { display: block; width: 100%; min-height: 260px; padding: 1rem; resize: vertical; border: 1px solid var(--line); border-radius: 0; background: var(--panel); color: var(--text); font: .85rem/1.6 var(--mono); }
.formatter-form textarea:focus, #formatted-output:focus, .option-field select:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.options-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.option-field { display: grid; gap: .45rem; color: var(--muted); font-size: .8rem; }
.option-field select { width: 100%; min-height: 44px; padding: .6rem; border: 1px solid var(--line); border-radius: 0; background: var(--panel); color: var(--text); }
.toggle-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; margin: 1.4rem 0; }
.toggle-grid label { display: flex; align-items: center; gap: .6rem; font-size: .85rem; cursor: pointer; }
.toggle-grid input { width: 17px; height: 17px; accent-color: var(--accent); }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: 1.3rem; }
.form-actions [role="status"] { color: var(--muted); font-size: .8rem; }
.form-actions button:disabled { opacity: .5; cursor: not-allowed; }
.result-section > p { margin: 0 0 1rem; color: var(--muted); font-size: .85rem; }
#formatted-output { min-height: 170px; }
.code-preview { min-height: 100px; overflow: auto; padding: 1rem; border: 1px solid var(--line); background: var(--panel); }
.empty-preview { margin: 0; color: var(--muted); font-size: .85rem; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 2rem; padding-top: 2rem; padding-bottom: 2rem; border-top: 1px solid var(--line); }
.site-footer p { color: var(--muted); font: .62rem var(--mono); text-align: right; }
@media (max-width: 800px) { .tools-layout { grid-template-columns: 1fr; gap: 2rem; } .tools-sidebar { position: static; } .tools-sidebar nav { display: flex; flex-wrap: wrap; } }
@media (max-width: 600px) { .tools-shell { padding-top: 105px; } .options-grid, .toggle-grid { grid-template-columns: 1fr; } .site-footer { flex-direction: column; align-items: flex-start; } .site-footer p { text-align: left; } }