/* tools.nikhil.pro — design system matching nikhil.pro */

:root {
  --bg: #fafafa;
  --card: #ffffff;
  --border: #e2e8f0;
  --ink: #0f172a;
  --body: #334155;
  --muted: #64748b;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --good: #16a34a;
  --bad: #dc2626;
  --warn: #d97706;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
}
[data-theme="dark"] {
  --bg: #0b1220;
  --card: #101a2e;
  --border: #1f2a3f;
  --ink: #f1f5f9;
  --body: #cbd5e1;
  --muted: #94a3b8;
  --accent: #6366f1;
  --accent-dark: #818cf8;
  --code-bg: #0a0f1c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: 64rem; margin: 0 auto; padding: 0 1.25rem; }
.wrap-narrow { max-width: 44rem; }

/* ---------- header ---------- */
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--card);
  position: sticky; top: 0; z-index: 40;
}
header.site .bar {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.7rem 0;
}
.brand { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1rem; letter-spacing: -0.01em; white-space: nowrap; min-width: 0; }
.brand .tag { flex: none; font-size: 0.65rem; font-weight: 700; color: var(--accent); border: 1px solid var(--border); border-radius: 999px; padding: 0.1rem 0.45rem; letter-spacing: 0.06em; text-transform: uppercase; }

.nav-links { margin-left: auto; display: flex; align-items: center; gap: 1.1rem; }
.nav-links a { color: var(--body); text-decoration: none; font-size: 0.92rem; white-space: nowrap; }
.nav-links a:hover { color: var(--accent); }

.hdr-actions { display: flex; align-items: center; gap: 0.4rem; }
.icon-btn {
  background: none; border: 1px solid var(--border); border-radius: 9px;
  color: var(--body); cursor: pointer; padding: 0.4rem 0.5rem; line-height: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.icon-btn svg { width: 18px; height: 18px; display: block; }
.icon-btn .moon { display: none; }
[data-theme="dark"] .icon-btn .sun { display: none; }
[data-theme="dark"] .icon-btn .moon { display: block; }
.menu-btn { display: none; }
.menu-btn .close { display: none; }
.menu-btn[aria-expanded="true"] .bars { display: none; }
.menu-btn[aria-expanded="true"] .close { display: block; }

@media (max-width: 720px) {
  .menu-btn { display: inline-flex; }
  .nav-links {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--card); border-bottom: 1px solid var(--border);
    padding: 0.25rem 1.25rem 0.75rem;
    margin-left: 0;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 0.8rem 0; font-size: 1rem; font-weight: 500;
    border-bottom: 1px solid var(--border);
  }
  .nav-links a:last-child { border-bottom: none; }
  header.site .bar { position: relative; }
  .hdr-actions { margin-left: auto; }
}

/* ---------- hero ---------- */
.hero { padding: 2.5rem 0 1.5rem; }
.eyebrow { display: inline-block; color: var(--muted); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.75rem; }
h1 { color: var(--ink); font-size: 2.1rem; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.75rem; }
h1 .hl { color: var(--accent); }
.lede { font-size: 1.06rem; color: var(--body); margin: 0 0 0.5rem; max-width: 40rem; }
@media (max-width: 640px) { h1 { font-size: 1.65rem; } }

h2 { color: var(--ink); font-size: 1.35rem; letter-spacing: -0.01em; margin: 0 0 0.75rem; }
h3 { color: var(--ink); font-size: 1.05rem; margin: 0 0 0.4rem; }

/* ---------- cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  margin: 0 0 1.25rem;
}
.card.pad-lg { padding: 2rem 1.75rem; }

/* ---------- forms ---------- */
label { display: block; font-size: 0.78rem; font-weight: 600; color: var(--ink); text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 0.3rem; }
label .opt { font-weight: 400; color: var(--muted); text-transform: none; letter-spacing: 0; }
input[type="number"], input[type="text"], input[type="url"], input[type="email"], select, textarea {
  width: 100%; padding: 0.7rem 0.85rem;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--ink);
  font-size: 1rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.88rem; line-height: 1.55; }
.field { margin: 0 0 0.9rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem 1rem; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }

.btn {
  display: inline-block; width: 100%;
  background: var(--accent); color: #fff;
  border: 1px solid var(--accent); border-radius: 10px;
  padding: 0.85rem 1.2rem; font-size: 1rem; font-weight: 600;
  font-family: inherit; cursor: pointer; text-align: center; text-decoration: none;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--accent); color: #fff; }
.btn.small { width: auto; padding: 0.5rem 0.9rem; font-size: 0.88rem; }

/* ---------- code / output ---------- */
pre.code {
  background: var(--code-bg); color: var(--code-ink);
  border-radius: 12px; padding: 1rem 1.15rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem; line-height: 1.6;
  overflow-x: auto; margin: 0.75rem 0;
  white-space: pre-wrap; word-break: break-word;
}
code.inline { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; padding: 0.05rem 0.35rem; font-size: 0.86em; font-family: ui-monospace, Menlo, Consolas, monospace; color: var(--ink); }

/* ---------- results / status ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem; margin: 0.5rem 0 1rem; }
@media (max-width: 640px) { .stat-grid { grid-template-columns: 1fr 1fr; } }
.stat { background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 0.9rem 1rem; }
.stat .v { display: block; font-size: 1.35rem; font-weight: 800; color: var(--ink); letter-spacing: -0.01em; }
.stat .k { display: block; font-size: 0.78rem; color: var(--muted); margin-top: 0.15rem; }

.verdict { border-left: 3px solid var(--border); padding: 0.5rem 0 0.5rem 0.9rem; margin: 0.6rem 0; font-size: 0.95rem; }
.verdict.good { border-color: var(--good); }
.verdict.bad { border-color: var(--bad); }
.verdict.warn { border-color: var(--warn); }
.verdict b { color: var(--ink); }

.bot-row { display: flex; align-items: flex-start; gap: 0.8rem; padding: 0.75rem 0; border-bottom: 1px solid var(--border); }
.bot-row:last-child { border-bottom: none; }
.pill { flex: none; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; border-radius: 999px; padding: 0.18rem 0.6rem; margin-top: 0.15rem; }
.pill.ok { background: rgba(22, 163, 74, 0.12); color: var(--good); }
.pill.no { background: rgba(220, 38, 38, 0.12); color: var(--bad); }
.pill.part { background: rgba(217, 119, 6, 0.12); color: var(--warn); }
.bot-row .bn { font-weight: 600; color: var(--ink); font-size: 0.95rem; }
.bot-row .bd { font-size: 0.85rem; color: var(--muted); }

/* ---------- checkbox list ---------- */
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1rem; margin: 0.5rem 0 1rem; }
@media (max-width: 640px) { .checks { grid-template-columns: 1fr; } }
.checks label { display: flex; align-items: center; gap: 0.5rem; font-size: 0.92rem; font-weight: 500; text-transform: none; letter-spacing: 0; color: var(--body); cursor: pointer; }
.checks input { width: auto; accent-color: var(--accent); }
.checks .sub { color: var(--muted); font-weight: 400; font-size: 0.8rem; }

/* ---------- tools grid ---------- */
.tools-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
@media (max-width: 700px) { .tools-grid { grid-template-columns: 1fr; } }
.tool-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.2rem 1.3rem; text-decoration: none; transition: border-color 0.15s ease; }
.tool-card:hover { border-color: var(--accent); }
.tool-card .tn { font-weight: 700; color: var(--ink); font-size: 1rem; margin-bottom: 0.25rem; }
.tool-card .td { font-size: 0.9rem; color: var(--muted); line-height: 1.5; }
.tool-card .new { font-size: 0.68rem; font-weight: 700; color: var(--accent); border: 1px solid var(--border); border-radius: 999px; padding: 0.08rem 0.45rem; margin-left: 0.4rem; vertical-align: middle; letter-spacing: 0.06em; }

/* ---------- read next ---------- */
.readnext a { color: var(--accent); text-decoration: none; }
.readnext a:hover { text-decoration: underline; }
.readnext li { margin: 0.3rem 0; }

/* ---------- FAQ ---------- */
.faq details { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 0.9rem 1.1rem; margin: 0 0 0.6rem; }
.faq summary { font-weight: 600; color: var(--ink); cursor: pointer; list-style: none; font-size: 0.97rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; display: inline-block; width: 1.2em; color: var(--muted); font-weight: 400; }
.faq details[open] summary::before { content: "−"; }
.faq .a { margin-top: 0.6rem; padding-left: 1.2em; font-size: 0.93rem; color: var(--body); }

/* ---------- subscribe / kit ---------- */
.subscribe { text-align: center; }
.subscribe h2 { margin-bottom: 0.3rem; }
.subscribe .sub { color: var(--muted); font-size: 0.93rem; margin: 0 0 1.1rem; }
.sub-form { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; max-width: 28rem; margin: 0 auto; }
.sub-form input[type="email"] { flex: 1 1 13rem; border-radius: 999px; padding: 0.7rem 1rem; }
.sub-form button { flex: none; width: auto; border-radius: 999px; padding: 0.7rem 1.3rem; }
.sub-ok { display: none; color: var(--good); font-weight: 600; margin-top: 0.6rem; }
.checklist-cta { display: inline-block; margin-top: 0.9rem; font-size: 0.9rem; color: var(--accent); text-decoration: none; }
.checklist-cta:hover { text-decoration: underline; }

/* ---------- bio ---------- */
.bio { display: flex; gap: 1.25rem; align-items: center; }
.avatar { flex: none; width: 104px; height: 104px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); }
@media (max-width: 640px) {
  .bio { flex-direction: column; text-align: center; align-items: center; }
}

/* ---------- footer ---------- */
footer.site { border-top: 1px solid var(--border); margin-top: 3rem; padding: 1.75rem 0 2.25rem; text-align: center; font-size: 0.85rem; color: var(--muted); }
footer.site a { color: var(--accent); text-decoration: none; }
footer.site a:hover { text-decoration: underline; }
footer.site .row { margin: 0.25rem 0; }

/* ---------- helpers ---------- */
.muted { color: var(--muted); }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.copy-wrap { position: relative; }
.copy-btn { position: absolute; top: 0.6rem; right: 0.6rem; }
section { margin: 2rem 0; }