styles.css

:root {
  --ink: #16202a;
  --paper: #f4f7fa;
  --muted: #64748b;
  --line: #d9e1e8;
  --saffron: #f9b84b;
  --coral: #d96856;
  --teal: #168b7d;
  --cream: #ffffff;
  --navy: #102a43;
  --blue: #1769aa;
  --blue-dark: #0f5791;
  --success: #0b7869;
  --danger: #b42318;
  --shadow: 0 8px 24px rgba(22, 32, 42, .07);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: Manrope, sans-serif;
}

a { color: inherit; text-decoration: none; }

.site-shell { max-width: 1280px; margin: auto; padding: 0 32px; }

.topbar {
  min-height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.brand, .eyebrow, .tool-number, footer, .tool-icon { font-family: "DM Mono", monospace; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--navy); font-size: 12px; font-weight: 500; letter-spacing: .7px; }
.brand-mark { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 6px; background: var(--blue); color: #fff; font-size: 10px; font-weight: 500; letter-spacing: 0; box-shadow: 0 2px 5px rgba(23, 105, 170, .24); }
.brand-name { white-space: nowrap; }
.topbar p { color: var(--muted); font-size: 12px; }

.hero { min-height: 330px; margin: 20px 0 0; padding: 42px 52px; display: grid; align-content: center; border: 1px solid #cbd9e6; border-radius: 8px; background: linear-gradient(112deg, #edf5fb 0%, #f8fbfd 58%, #e3f2ef 100%); }
.eyebrow { margin: 0 0 15px; color: var(--blue); font-size: 11px; font-weight: 500; letter-spacing: 1px; }
h1, h2 { font-family: Manrope, sans-serif; letter-spacing: 0; }
h1 { max-width: 760px; margin: 0; color: var(--navy); font-size: clamp(42px, 6vw, 70px); font-weight: 700; line-height: 1.12; }
h1 em { color: var(--blue); font-style: normal; font-weight: 700; }
.hero-copy { max-width: 535px; margin: 17px 0 21px; color: #435568; font-size: 15px; line-height: 1.6; }
.primary-link { width: fit-content; padding: 11px 16px; border: 1px solid var(--blue); border-radius: 5px; background: var(--blue); color: #fff; font-size: 13px; font-weight: 700; }
.primary-link:hover { background: var(--blue-dark); }
.primary-link span { margin-left: 10px; }
.capability-banner { display: grid; grid-template-columns: minmax(280px, 1fr) auto auto auto; gap: 22px; align-items: center; margin-top: 16px; padding: 14px 18px; border: 1px solid #c4d7e6; border-radius: 7px; background: var(--navy); color: #edf7ff; box-shadow: 0 6px 16px rgba(16, 42, 67, .11); }
.banner-intro { display: flex; min-width: 0; gap: 9px; align-items: center; color: #c7d8e6; font-size: 12px; }
.banner-intro strong { color: #fff; font: 500 11px "DM Mono", monospace; letter-spacing: .55px; white-space: nowrap; }
.banner-signal { width: 8px; height: 8px; flex: 0 0 8px; border-radius: 50%; background: #5dd1bc; box-shadow: 0 0 0 4px rgba(93, 209, 188, .16); }
.banner-stat { display: grid; grid-template-columns: auto auto; gap: 7px; align-items: baseline; white-space: nowrap; }
.banner-stat strong { color: #7cd9ef; font: 700 22px Manrope, sans-serif; }
.banner-stat span, .banner-topics { color: #b2c8d8; font: 10px "DM Mono", monospace; letter-spacing: .55px; }
.banner-topics { display: flex; gap: 10px; justify-content: flex-end; white-space: nowrap; }
.banner-topics span + span::before { margin-right: 10px; color: #5a7891; content: "/"; }

.tool-index { padding: 64px 0 80px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.section-heading .eyebrow { margin: 0; }
h2 { margin: 0; color: var(--navy); font-size: clamp(24px, 3vw, 34px); font-weight: 700; }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tool-card { position: relative; min-height: 250px; padding: 24px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 7px; background: var(--cream); box-shadow: 0 2px 5px rgba(22, 32, 42, .025); transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
.tool-card:hover { transform: translateY(-2px); border-color: #a9c0d2; box-shadow: var(--shadow); }
.tool-grid > article.tool-card { padding: 0; }
.tool-card-link { display: flex; min-height: 250px; padding: 24px; flex-direction: column; color: inherit; }
.tool-card-link:hover { color: inherit; }
.catalog-controls { display: grid; grid-template-columns: minmax(260px, 1fr) 160px auto auto; gap: 12px; align-items: end; margin: 0 0 22px; padding: 16px; border: 1px solid var(--line); border-radius: 7px; background: var(--cream); }
.catalog-search-label, .catalog-group-label { display: grid; gap: 7px; color: #405569; font: 10px "DM Mono", monospace; letter-spacing: .4px; }
.catalog-controls input[type="search"], .catalog-controls select { width: 100%; height: 35px; padding: 8px 10px; border: 1px solid #b9c8d4; border-radius: 4px; background: #fff; color: var(--ink); font: 12px "DM Mono", monospace; }
.catalog-controls input:focus, .catalog-controls select:focus { border-color: var(--blue); outline: 3px solid rgba(23, 105, 170, .13); }
.favorites-toggle { display: flex; height: 35px; gap: 7px; align-items: center; color: #405569; font: 10px "DM Mono", monospace; white-space: nowrap; }
.catalog-count { margin: 0; padding: 10px 0; color: var(--muted); font: 10px "DM Mono", monospace; text-align: right; white-space: nowrap; }
.favorite-button { position: absolute; z-index: 2; top: 16px; right: 50px; width: 29px; height: 29px; padding: 0; border-color: transparent; border-radius: 4px; background: transparent; color: #8aa0b3; font-size: 17px; line-height: 1; }
.favorite-button:hover { border-color: #cbd9e6; background: #edf5fb; color: var(--blue); }
.favorite-button[aria-pressed="true"] { color: #d99016; }
.tool-card.is-hidden { display: none; }
.card-saffron, .card-coral, .card-teal { background: var(--cream); }
.tool-number { color: var(--muted); font-size: 11px; }
.tool-icon { display: grid; width: 42px; height: 42px; margin: 29px 0 20px; place-items: center; border-radius: 6px; background: #e9f1f8; color: var(--blue); font-size: 14px; font-weight: 500; }
.card-coral .tool-icon { background: #fcebe7; color: #b85444; }
.card-teal .tool-icon { background: #e4f4f0; color: var(--success); font-size: 10px; }
.tool-name { color: var(--navy); font-size: 20px; font-weight: 700; line-height: 1.3; }
.tool-description { margin: 10px 0 0; max-width: 260px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.tool-meta { margin-top: auto; padding-top: 18px; color: var(--blue); font: 10px "DM Mono", monospace; letter-spacing: .35px; }
.card-arrow { position: absolute; top: 21px; right: 22px; color: var(--blue); font-size: 18px; }
.site-footer { display: flex; justify-content: center; gap: 16px; padding: 25px 28px; border-top: 1px solid var(--line); color: var(--muted); font: 11px "DM Mono", monospace; letter-spacing: .7px; text-align: center; }
.site-footer a { color: var(--blue); font-weight: 500; }
.site-footer a:hover { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 3px; }

.tool-page { min-height: 100vh; }
.tool-layout { max-width: 1280px; margin: auto; padding: 0 32px 70px; }
.tool-nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; border-bottom: 1px solid var(--line); }
.back-link { font-family: "DM Mono", monospace; font-size: 12px; }
.back-link:hover { color: var(--blue); }
.nav-links { display: flex; gap: 4px; font-family: "DM Mono", monospace; font-size: 11px; }
.nav-links a { padding: 8px 10px; border-radius: 4px; color: var(--muted); }
.nav-links a:hover { color: var(--blue); background: #edf4fa; }
.nav-links .active { background: #dcecf8; color: var(--blue-dark); font-weight: 500; }
.tool-header { padding: 48px 0 26px; }
.tool-header h1 { font-size: clamp(34px, 4vw, 48px); }
.tool-header p:last-child { max-width: 610px; margin: 14px 0 0; color: #526578; font-size: 14px; line-height: 1.65; }
.work-area { display: grid; grid-template-columns: 1fr 36px 1fr; gap: 16px; align-items: stretch; }
.work-panel { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 7px; background: var(--cream); box-shadow: 0 2px 5px rgba(22, 32, 42, .025); }
.panel-header { display: flex; justify-content: space-between; align-items: center; min-height: 29px; margin-bottom: 12px; }
.panel-header label { color: #405569; font-family: "DM Mono", monospace; font-size: 11px; font-weight: 500; letter-spacing: .5px; }
.panel-actions { display: flex; gap: 8px; }
button, .file-button { border: 1px solid #b9c8d4; border-radius: 4px; background: #fff; color: #34516b; cursor: pointer; font: 500 11px "DM Mono", monospace; padding: 7px 9px; transition: background .15s ease, border-color .15s ease, color .15s ease; }
button:hover, .file-button:hover { border-color: var(--blue); background: #edf5fb; color: var(--blue-dark); }
#convert-run, #sql-format { border-color: var(--blue); background: var(--blue); color: #fff; box-shadow: 0 1px 2px rgba(15, 87, 145, .18); }
#convert-run:hover, #sql-format:hover { border-color: var(--blue-dark); background: var(--blue-dark); color: #fff; }
.file-button input { display: none; }
textarea, pre { width: 100%; height: 380px; margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 5px; background: #fbfcfd; color: #21374a; font: 13px/1.6 "DM Mono", monospace; resize: vertical; white-space: pre-wrap; overflow: auto; }
textarea:focus { border-color: var(--blue); outline: 3px solid rgba(23, 105, 170, .13); outline-offset: 0; }
pre { min-height: 380px; height: auto; }
.direction { display: grid; place-items: center; color: var(--blue); font: 20px "DM Mono", monospace; }
.status { min-height: 38px; margin: 14px 0 0; padding: 10px 12px; border: 1px solid #d8e7e3; border-radius: 5px; background: #f0f9f7; color: var(--success); font: 12px "DM Mono", monospace; }
.status.error { border-color: #f1d1cd; background: #fff3f1; color: var(--danger); }
.control-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.control-row select { border: 1px solid #b9c8d4; border-radius: 4px; padding: 8px; background: var(--cream); color: #34516b; font: 12px "DM Mono", monospace; }
.convert-layout { grid-template-columns: 1fr 1fr; }
.convert-layout .direction { display: none; }
.sql-options { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 16px; font: 12px "DM Mono", monospace; }
.sql-options label { display: flex; gap: 7px; align-items: center; }
.result-area { min-height: 380px; padding: 14px; overflow: auto; border: 1px solid var(--line); border-radius: 5px; background: #fbfcfd; color: #405569; font: 13px/1.6 "DM Mono", monospace; }
.result-panel { margin-top: 16px; }
.result-area table { width: 100%; border-collapse: collapse; font-size: 11px; }
.result-area th, .result-area td { padding: 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.result-area th { color: var(--muted); font-weight: 500; }
.metric-row { display: flex; flex-wrap: wrap; gap: 8px 15px; align-items: baseline; margin-bottom: 16px; color: var(--muted); }
.metric-row strong { color: var(--blue); font-size: 22px; }
.metric-row span { margin-right: 8px; font-size: 11px; }
.diff-result { min-height: 160px; max-height: 420px; }
.diff-line { display: grid; grid-template-columns: 28px 1fr; gap: 8px; min-height: 25px; padding: 3px 7px; border-bottom: 1px solid #eef2f5; }
.diff-line span { color: var(--muted); text-align: right; }
.diff-line code { overflow-wrap: anywhere; }
.diff-add { background: #eaf7f2; color: #096c5e; }
.diff-remove { background: #fff0ee; color: #a93027; }
.key-values { margin: 0; }
.key-values dt { margin-top: 12px; color: var(--muted); font-size: 10px; font-weight: 500; letter-spacing: .5px; }
.key-values dt:first-child { margin-top: 0; }
.key-values dd { margin: 2px 0 0; overflow-wrap: anywhere; color: var(--ink); }
.result-summary { margin: 0 0 12px; color: var(--success); font-weight: 500; }
.match-row { display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.match-row > span { color: var(--muted); }
.match-row small { color: var(--muted); font-size: 10px; }
.validation-list { margin: 0; padding-left: 20px; color: var(--danger); }
.validation-list li { margin-bottom: 8px; }
.form-panel { margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 16px; }
.form-grid label, .regex-controls label { display: grid; gap: 7px; color: #405569; font: 11px "DM Mono", monospace; }
.form-grid input, .form-grid select, .regex-controls input { width: 100%; min-width: 0; padding: 9px; border: 1px solid #b9c8d4; border-radius: 4px; background: #fff; color: var(--ink); font: 12px "DM Mono", monospace; }
.single-field { grid-template-columns: minmax(0, 460px); }
.mask-options, .regex-controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; margin-bottom: 16px; font: 12px "DM Mono", monospace; }
.mask-options label { display: flex; align-items: center; gap: 6px; }
.regex-controls label:first-child { flex: 1 1 350px; }
.regex-controls label:nth-child(2) { flex: 0 0 75px; }
.compact-input { height: 115px; min-height: 115px; }
.generator-controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; }
.generator-controls label { display: grid; gap: 7px; color: #405569; font: 11px "DM Mono", monospace; }
.generator-controls input { width: 90px; padding: 8px; border: 1px solid #b9c8d4; border-radius: 4px; font: 12px "DM Mono", monospace; }
.generator-controls button:first-of-type { border-color: var(--blue); background: var(--blue); color: #fff; }
.generator-controls button:disabled { cursor: not-allowed; opacity: .45; }
.panel-meta { color: var(--muted); font: 10px "DM Mono", monospace; }
.data-preview { min-height: 380px; }
.table-search { width: 160px; padding: 7px 9px; border: 1px solid #b9c8d4; border-radius: 4px; color: var(--ink); font: 11px "DM Mono", monospace; }
.table-search:focus { border-color: var(--blue); outline: 3px solid rgba(23, 105, 170, .13); }

@media (max-width: 720px) {
  .site-shell, .tool-layout { padding-left: 18px; padding-right: 18px; }
  .topbar p { display: none; }
  .hero { min-height: 350px; margin-top: 16px; padding: 30px 24px; }
  .capability-banner { grid-template-columns: 1fr auto auto; gap: 12px; padding: 14px; }
  .banner-intro > span:last-child, .banner-topics { display: none; }
  .section-heading { display: block; }
  .section-heading .eyebrow { margin-bottom: 12px; }
  .tool-grid, .work-area, .convert-layout { grid-template-columns: 1fr; }
  .catalog-controls { grid-template-columns: 1fr 1fr; }
  .catalog-search-label { grid-column: 1 / -1; }
  .catalog-count { text-align: left; }
  .site-footer { flex-direction: column; gap: 8px; }
  .tool-card { min-height: 205px; }
  .tool-icon { margin-top: 22px; }
  .direction { min-height: 20px; transform: rotate(90deg); }
  .nav-links { gap: 0; font-size: 10px; }
  .nav-links a { padding: 7px 6px; }
  .tool-header { padding-top: 38px; }
  textarea, pre { height: 300px; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .result-area { min-height: 260px; }
  .match-row { grid-template-columns: 22px 1fr; }
  .match-row small { grid-column: 2; }
}