/*!
 * @authormark v1 -- do not remove (authorship watermark)⁠​‌‌‌​​‌‌​‌‌​‌​​‌​‌‌‌​‌‌​​‌‌‌​‌​​​‌‌​​‌‌‌​​‌​‌‌​‌​‌‌​‌‌‌​​‌‌​‌‌‌​​​‌‌‌​​‌​​‌‌​​‌​​‌‌‌‌​​​​‌​​​​​‌​‌​‌​‌‌‌​‌​​‌​​‌​​‌‌​‌‌​​‌‌​‌‌​​​‌‌‌​​​‌​‌​​‌‌‌​​​‌‌​‌‌‌​‌‌‌​​‌​​‌​​​​‌‌​​‌‌​​​​⁠
 * Copyright (c) 2026 Srinivasan Vijayaraghavan <srinivasan.shyam2000@gmail.com>
 * Author: https://github.com/Srinivasan-78
 * SPDX-License-Identifier: MIT
 * Fingerprint: AMK1.sivtg-nn92xAWI6lqN7rC0
 */
/* Design tokens, type scale and component shapes are taken from
   srinivasan-78.github.io so this tool reads as part of the same site:
   one accent, flat borderless cards, whitespace instead of rules, and
   mono micro-labels for anything the page says about itself. */

:root,
html[data-theme="light"] {
  color-scheme: light;

  --paper: #ffffff;
  --paper-raised: #f5f5f7;
  --ink: #1d1d1f;
  --ink-70: #424245;
  --ink-45: #6e6e73;
  --ink-15: #d2d2d7;
  --ink-08: #ebebed;

  --accent: #0066cc;
  --accent-wash: #f0f7ff;
  --accent-line: #b6dbff;
  --accent-solid: #0066cc;
  --danger: #b3261e;

  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --max: 1040px;
  --gutter: 24px;
  --measure: 62ch;
  --ease: cubic-bezier(0.28, 0.11, 0.32, 1);
}

html[data-theme="dark"] {
  color-scheme: dark;

  --paper: #000000;
  --paper-raised: #121214;
  --ink: #f5f5f7;
  --ink-70: #a1a1a6;
  --ink-45: #86868b;
  --ink-15: rgba(255, 255, 255, 0.1);
  --ink-08: rgba(255, 255, 255, 0.055);

  --accent: #2997ff;
  --accent-wash: #0b1c2c;
  --accent-line: #1b3a5c;
  /* White on #2997ff fails on a button label, so the fill keeps the
     light theme's blue while links keep the brighter one. */
  --accent-solid: #0071e3;
  --danger: #ff6961;
}

* { box-sizing: border-box; }

html { background: var(--paper); scroll-padding-top: 120px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; }
main:focus { outline: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  transform: translateY(-120%);
  padding: 0.7rem 1.1rem;
  background: var(--accent-solid);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  border-bottom-right-radius: 8px;
  transition: transform 0.2s var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); width: 100%; }

/* ---------- TYPE ---------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-45);
  margin: 0;
  font-weight: inherit;
}

.display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.022em;
  line-height: 1.08;
  text-wrap: balance;
  margin: 0;
}
.display-xl { font-size: clamp(2.4rem, 6vw, 4rem); }
.display-lg { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }

.micro {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--ink-45);
  margin: 0;
}
.micro-row {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.lnk { position: relative; color: var(--ink-70); }
.lnk::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.lnk:hover::after,
.lnk:focus-visible::after { transform: scaleX(1); }

/* ---------- LAYOUT ---------- */

.section { position: relative; overflow-x: clip; padding: clamp(4.5rem, 10vw, 8rem) 0; }
.section-bleed { padding-top: clamp(2rem, 5vw, 3.5rem); }

.hero { padding-bottom: clamp(2rem, 5vw, 3rem); }
.hero .eyebrow { margin-bottom: 1.25rem; }
.hero h1 { max-width: 18ch; }

.sec-lede {
  color: var(--ink-70);
  max-width: var(--measure);
  margin: 1.5rem 0 0;
}

.sec-head { margin-bottom: 2rem; }
.sec-head .eyebrow { margin-bottom: 0.6rem; }

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 60px;
}
.nav-links { display: flex; align-items: center; gap: 1.25rem; }

.nav-toggle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--ink-15);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-45);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-toggle:hover { color: var(--ink); border-color: var(--ink-45); }

.section-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

/* ---------- COMPONENTS ---------- */

/* Pill, filled or plain — never outlined, so two calls to action never
   compete. */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border: 0;
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  font: inherit;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 0.22s var(--ease), opacity 0.22s var(--ease);
}
.btn:hover { background: var(--accent-wash); }
.btn.primary { background: var(--accent-solid); color: #fff; }
.btn.primary:hover { background: var(--accent-solid); opacity: 0.85; }
.btn[disabled] { opacity: 0.4; cursor: default; }
.btn[disabled]:hover { background: transparent; }
.btn.primary[disabled]:hover { background: var(--accent-solid); }
.btn.small {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.8rem;
}

.card {
  display: block;
  border: 0;
  border-radius: 18px;
  padding: 2rem 1.75rem;
  background: var(--paper-raised);
  transition: background 0.25s var(--ease);
}
.card-body {
  margin: 0;
  max-width: 38ch;
  color: var(--ink-70);
  font-size: 0.94rem;
  line-height: 1.5;
}

.drop { text-align: center; padding: clamp(2.5rem, 6vw, 4rem) 1.75rem; }
.drop.over { background: var(--accent-wash); }
.drop-title { font-size: 1.4rem; margin-bottom: 0.6rem; }
.drop-body { margin: 0 auto 1.75rem; }
.pickers { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin: 0; }

.options { margin-top: 1rem; }
.options-head { margin-bottom: 1.25rem; }
.options-grid { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: flex-end; }
.options-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-45);
}
.options-grid label.check {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.55rem;
}
.options-grid input,
.options-grid select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--ink-15);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  text-transform: none;
}
.options-grid input[type="checkbox"] { padding: 0; accent-color: var(--accent); }

.status { margin-top: 1.5rem; }
.toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }

.table-wrap { padding: 0.75rem 1rem; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-45);
}
th, td {
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--ink-08);
  text-align: left;
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
td:first-child { white-space: normal; word-break: break-word; }
th:nth-child(3), th:nth-child(5), td:nth-child(3), td:nth-child(5) { text-align: right; }
td.pending, td.converting { color: var(--ink-45); }
td.failed, td.empty { color: var(--danger); white-space: normal; }
td button + button { margin-left: 0.25rem; }

.totals { margin-top: 1.25rem; }

.preview-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0 1rem;
}

pre {
  max-height: 30rem;
  margin: 0;
  padding: 1.5rem;
  overflow: auto;
  border-radius: 18px;
  background: var(--paper-raised);
  color: var(--ink-70);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  letter-spacing: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 520px) {
  html { scroll-padding-top: 88px; }
  .micro-row { justify-content: flex-start; gap: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}