/* ==================================================================
   Plutonium Browser — components
   ================================================================== */

/* ------------------------------- nav ----------------------------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 11, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav__inner { display: flex; align-items: center; gap: 1.2rem; height: 54px; }

.brand {
  display: flex; align-items: center; gap: .55rem;
  font-size: .88rem; font-weight: 700;
  letter-spacing: -.02em; text-decoration: none;
  text-transform: lowercase;
}

.brand img { width: 20px; height: 20px; }
.brand b { color: var(--accent); font-weight: 700; }

.nav__links { display: flex; gap: 0; margin-left: auto; list-style: none; }

.nav__links a {
  display: block; padding: .35rem .8rem;
  color: var(--dim); font-size: .82rem; text-decoration: none;
  border: 1px solid transparent;
  transition: color .12s, border-color .12s;
}

.nav__links a::before { content: "/"; color: var(--line); margin-right: .3rem; }
.nav__links a:hover { color: var(--text); }
.nav__links a[aria-current="page"] { color: var(--accent); }

.nav__toggle {
  display: none; margin-left: auto;
  width: 34px; height: 34px;
  border: 1px solid var(--line); background: transparent;
  color: var(--text); cursor: pointer;
}

/* ----------------------------- buttons --------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.1rem;
  border: 1px solid var(--line);
  background: transparent; color: var(--text);
  font: 700 .82rem/1 var(--mono);
  letter-spacing: .02em; text-transform: uppercase;
  text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}

.btn::before { content: "["; color: var(--faint); }
.btn::after  { content: "]"; color: var(--faint); }

.btn:hover { border-color: var(--accent-lo); color: var(--accent); }
.btn:hover::before, .btn:hover::after { color: var(--accent-lo); }

.btn--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.btn--primary::before, .btn--primary::after { color: rgba(10,10,11,.45); }
.btn--primary:hover { background: #b096ff; border-color: #b096ff; color: var(--on-accent); }
.btn--primary:hover::before, .btn--primary:hover::after { color: rgba(10,10,11,.45); }

.btn--sm { padding: .45rem .8rem; font-size: .74rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }

/* ------------------------------ panels --------------------------- */

.panel { border: 1px solid var(--line); background: var(--panel); }

.panel__bar {
  display: flex; align-items: center; gap: .7rem;
  padding: .45rem .8rem;
  border-bottom: 1px solid var(--line);
  background: var(--raised);
  color: var(--faint); font-size: .72rem;
  letter-spacing: .1em; text-transform: uppercase;
}

.panel__bar .grow { flex: 1 1 auto; }
.panel__body { padding: 1.1rem; }

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.card { padding: 1.3rem; background: var(--panel); }
.card h3 { margin-bottom: .5rem; }
.card h3::before { content: "› "; color: var(--accent); }
.card p { font-size: .88rem; line-height: 1.6; }

/* ---------------------------- walkthrough ------------------------ */
/* The hero. A scripted tour of the real interface — it types, it
   counts, it changes state. Every frame is the browser's own chrome. */

.demo { border: 1px solid var(--line); background: var(--panel); }

.demo__chrome { border-bottom: 1px solid var(--line-lo); }

.demo__tabs {
  display: flex; align-items: flex-end; gap: 4px;
  height: 34px; padding-left: 8px; background: #161616;
}

.demo__tab {
  display: flex; align-items: center; gap: 7px;
  width: 150px; height: 25px; padding: 0 9px;
  background: #323232; color: #8a8a8a;
  font-size: .68rem; white-space: nowrap; overflow: hidden;
}

.demo__tab.is-active { background: #545454; color: #fff; font-weight: 700; }
.demo__tab i { width: 8px; height: 8px; background: #5a5a5a; flex: none; }
.demo__tab.is-active i { background: var(--accent); }

.demo__bar {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 9px; background: #161616;
}

.demo__nav { display: flex; gap: 1px; color: #b4b4b4; flex: none; font-size: .72rem; }
.demo__nav span { width: 22px; height: 22px; display: grid; place-items: center; }

.demo__omni {
  flex: 1 1 auto; display: flex; align-items: center; gap: 8px;
  height: 26px; padding: 0 11px; background: #323232;
  color: #fff; font-size: .78rem; min-width: 0;
}

.demo__omni .caret {
  display: inline-block; width: 7px; height: 13px;
  background: var(--accent); vertical-align: -2px;
  animation: blink 1.05s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.demo__stage {
  position: relative;
  min-height: 250px;
  padding: 1.2rem;
  background: #101012;
}

.frame { display: none; }
.frame.is-on { display: block; }

.frame__title {
  color: var(--accent);
  font-size: .74rem; letter-spacing: .16em; text-transform: uppercase;
  margin-bottom: .9rem;
}

.frame__line { color: var(--dim); font-size: .82rem; line-height: 1.85; }
.frame__line b { color: var(--text); font-weight: 700; }
.frame__line .ok { color: var(--ok); }
.frame__line .warn { color: var(--warn); }
.frame__line .acc { color: var(--accent); }
.frame__line .fade { color: var(--faint); }

.frame__note {
  margin-top: 1.1rem; padding-top: .9rem;
  border-top: 1px solid var(--line-lo);
  color: var(--faint); font-size: .78rem;
}

/* level selector inside a frame */
.levels { display: flex; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.levels span {
  flex: 1; padding: .5rem; text-align: center;
  background: var(--panel); color: var(--faint); font-size: .74rem;
  text-transform: uppercase; letter-spacing: .08em;
}
.levels span.on { background: var(--accent); color: var(--on-accent); font-weight: 700; }

/* counter inside a frame */
.counter { font-size: 2.6rem; font-weight: 700; letter-spacing: -.05em; color: var(--accent); }

.hosts { margin-top: .5rem; color: var(--faint); font-size: .74rem; line-height: 1.7; }

/* controls */
.demo__foot {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .8rem;
  border-top: 1px solid var(--line);
  background: var(--raised);
}

.demo__ticks { display: flex; gap: 4px; margin-right: auto; }

.demo__tick {
  width: 26px; height: 3px;
  border: 0; padding: 0;
  background: var(--line); cursor: pointer;
}

.demo__tick.is-on { background: var(--accent); }

.demo__btn {
  border: 1px solid var(--line); background: transparent;
  color: var(--dim); font: 400 .72rem/1 var(--mono);
  padding: .3rem .55rem; cursor: pointer;
}

.demo__btn:hover { color: var(--text); border-color: var(--faint); }

/* ------------------------------ table ---------------------------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--line); }

table { width: 100%; border-collapse: collapse; font-size: .84rem; }

th, td { padding: .6rem .8rem; text-align: left; border-bottom: 1px solid var(--line-lo); }
tr:last-child td { border-bottom: 0; }

th {
  color: var(--faint); font-size: .68rem; font-weight: 400;
  letter-spacing: .14em; text-transform: uppercase;
  border-bottom-color: var(--line);
}

td { color: var(--dim); vertical-align: top; }
td:first-child { color: var(--text); white-space: nowrap; }

/* ------------------------------ notes ---------------------------- */

.note {
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--faint);
  background: var(--panel);
  color: var(--dim); font-size: .85rem;
}

.note--warn { border-left-color: var(--warn); }
.note--accent { border-left-color: var(--accent); }
.note strong { color: var(--text); }

/* ------------------------------- pre ----------------------------- */

pre {
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  background: #0c0c0e;
  overflow-x: auto;
}

pre code { padding: 0; background: none; color: #cfcfd6; font-size: .8rem; line-height: 1.7; }
pre code .c { color: var(--faint); }
pre code .p { color: var(--accent); }

/* ---------------------------- downloads -------------------------- */

.dl { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line);
      grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.dl__card { display: flex; flex-direction: column; padding: 1.3rem; background: var(--panel); }
.dl__card.is-detected { background: var(--accent-bg); }

.dl__os {
  display: flex; align-items: center; gap: .5rem;
  font-size: .95rem; font-weight: 700; text-transform: uppercase; letter-spacing: -.02em;
}

.dl__os svg { width: 17px; height: 17px; color: var(--accent); }

.dl__badge {
  margin-left: auto; padding: .1rem .4rem;
  background: var(--accent); color: var(--on-accent);
  font-size: .62rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}

.dl__meta { margin: .5rem 0 1rem; color: var(--faint); font-size: .74rem; overflow-wrap: anywhere; }
.dl__card .btn { width: 100%; justify-content: center; }
.dl__alt { margin-top: .5rem; font-size: .76rem; }
.dl__alt a { color: var(--dim); text-decoration: none; }
.dl__alt a::before { content: "→ "; color: var(--faint); }
.dl__alt a:hover { color: var(--accent); }

.dl__hash {
  margin-top: .5rem;
  color: var(--faint);
  font-size: .66rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.dl__hash span {
  color: var(--dim);
  cursor: pointer;
}

.dl__hash span:hover { color: var(--accent); }
.dl__hash span:empty::before { content: "pending"; color: var(--faint); }

/* ----------------------------- footer ---------------------------- */

.footer { padding: 2.5rem 0 2rem; border-top: 1px solid var(--line); }

.footer__grid {
  display: grid; gap: 1.8rem;
  grid-template-columns: 1.5fr repeat(auto-fit, minmax(130px, 1fr));
}

.footer h4 {
  margin-bottom: .6rem; color: var(--faint);
  font-size: .68rem; font-weight: 400;
  letter-spacing: .16em; text-transform: uppercase;
}

.footer ul { list-style: none; }
.footer li + li { margin-top: .3rem; }
.footer a { color: var(--dim); font-size: .82rem; text-decoration: none; }
.footer a:hover { color: var(--accent); }

.footer__legal {
  display: flex; flex-wrap: wrap; gap: .4rem 1.2rem;
  margin-top: 1.8rem; padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--faint); font-size: .74rem;
}

.footer__legal p { color: inherit; font-size: inherit; }

/* --------------------------- responsive -------------------------- */

@media (max-width: 780px) {
  .nav__toggle { display: grid; place-items: center; }
  .nav__links {
    position: absolute; left: 0; right: 0; top: 54px;
    flex-direction: column; padding: .3rem;
    background: var(--panel); border-bottom: 1px solid var(--line);
  }
  .nav__links[hidden] { display: none; }
  .nav__links a { padding: .6rem .8rem; }
  .demo__tab:nth-child(2) { display: none; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}