/* Shared look of the personal pages (homepage and blog): tokens, top bar, panels, buttons.
   The security tools keep their own terminal style (tool.css). */
:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #121826;
  --muted: #5f6b7e;
  --line: #e3e7ee;
  --navy: #0b1220;
  --ok: #16a34a;
  --ok-soft: #e8f6ee;
  --warn: #d97706;
  --warn-soft: #fdf3e2;
  --bad: #dc2626;
  --bad-soft: #fdecec;
  --accent: #2563eb;
  --accent-soft: #e8efff;
  --sans: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --panel: #111827;
    --text: #e5e9f0;
    --muted: #93a0b4;
    --line: #1f2937;
    --navy: #060a12;
    --ok: #22c55e;
    --ok-soft: #0f2a1a;
    --warn: #f59e0b;
    --warn-soft: #2d2410;
    --bad: #f87171;
    --bad-soft: #2c1414;
    --accent: #60a5fa;
    --accent-soft: #14213a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
[hidden] { display: none !important; }

/* ---- top bar ---------------------------------------------------------------------- */
.top { position: sticky; top: 0; z-index: 5; background: var(--navy); color: #e5e9f0; }
.top-in { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 600; font-family: var(--mono); font-size: .95rem; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34, 197, 94, .2); flex: none; }
.top nav { display: flex; gap: 20px; margin-left: auto; }
.top nav a { color: #b6c0d0; font-size: .9rem; }
.top nav a:hover, .top nav a[aria-current="page"] { color: #fff; text-decoration: none; }
.lang { display: inline-flex; border: 1px solid #2a3446; border-radius: 8px; padding: 2px; flex: none; }
.lang button { border: 0; background: transparent; color: #b6c0d0; font: inherit; font-size: .8rem; padding: .2rem .65rem; border-radius: 6px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: #fff; color: var(--navy); }

/* ---- building blocks ---------------------------------------------------------------- */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 24px; margin-bottom: 20px; }
h2 { font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0 0 1rem; font-weight: 700; }
h3 { font-size: 1.02rem; margin: 0; }
.links { display: flex; flex-wrap: wrap; gap: 8px; }
.btn { display: inline-block; padding: .5rem 1.05rem; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); font-weight: 600; font-size: .9rem; }
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--text); border-color: var(--text); color: var(--bg); }
.tag { display: inline-block; font-size: .72rem; padding: 1px 8px; border-radius: 999px; background: var(--bg); color: var(--muted); border: 1px solid var(--line); }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; color: var(--muted); font-size: .85rem; padding: 8px 0 40px; }

@media (max-width: 900px) { .top nav a:not(:first-child) { display: none; } .top-in { gap: 14px; } } /* keep Blog on phones */
@media (max-width: 600px) { .wrap { padding: 0 16px; } .panel { padding: 18px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }