/* iroh-drop web — dark, focused, no framework */

:root {
  --bg: #0b0d12;
  --bg-soft: #11141c;
  --card: #161a24;
  --border: #262c3b;
  --text: #e8ebf2;
  --muted: #8b93a7;
  --accent: #7c7cf4;
  --accent-2: #4cc2ff;
  --ok: #4ade80;
  --warn: #fbbf24;
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; } /* CSS display rules must not defeat the attribute */
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 500px at 85% -10%, #1b2040 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 0%, #0e2438 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); font-size: .88em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 0 0 1rem; letter-spacing: -0.02em; }
h2 { font-size: 1.6rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; margin: 0 0 .5rem; }
p { margin: 0 0 .8rem; }
.muted { color: var(--muted); }
.tiny { font-size: .82rem; }
.accent { color: var(--accent-2); }

.card {
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  backdrop-filter: blur(6px);
}

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

#nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; row-gap: .3rem;
  padding: .7rem 1.4rem;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: .5rem;
  color: var(--text); font-weight: 650; letter-spacing: -0.01em;
}
.brand svg { color: var(--accent); }
.nav-links { display: flex; gap: 1.2rem; font-size: .92rem; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---------- hero + app ---------- */

.hero {
  max-width: 1120px; margin: 0 auto;
  padding: 3.5rem 1.4rem 2rem;
  display: grid; grid-template-columns: 1.1fr .95fr; gap: 2.5rem; align-items: start;
}
.lede { color: var(--muted); font-size: 1.08rem; max-width: 34rem; }
.badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.2rem; }
.badges span {
  font-size: .8rem; color: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--accent-2) 35%, transparent);
  border-radius: 999px; padding: .15rem .7rem;
}

.app-card { display: flex; flex-direction: column; gap: .9rem; }

.receive-banner {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  border-radius: 10px; padding: .7rem .9rem;
  display: flex; flex-direction: column; gap: .1rem;
}

.link-box label { display: block; font-size: .82rem; color: var(--muted); margin-bottom: .35rem; }
.link-row { display: flex; gap: .5rem; align-items: center; }
.link-row code {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 8px; padding: .45rem .6rem; font-size: .8rem;
}

#dropzone {
  border: 1.5px dashed color-mix(in srgb, var(--muted) 45%, transparent);
  border-radius: 12px; padding: 1.6rem 1rem; text-align: center;
  cursor: pointer; transition: border-color .15s, background .15s;
}
#dropzone:hover, #dropzone.drag {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.file-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .5rem; }
.file-list li {
  display: flex; justify-content: space-between; align-items: center; gap: .8rem;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 10px; padding: .55rem .8rem;
}
.file-list li > div:first-child { min-width: 0; }
.file-list .fname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-list .fsize { color: var(--muted); font-size: .82rem; margin-left: .4rem; }
.file-list .fstate { color: var(--ok); font-size: .82rem; white-space: nowrap; }

.progress { height: 4px; border-radius: 2px; background: var(--border); margin-top: .35rem; overflow: hidden; }
.progress > div { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .2s; }

.join-row { display: flex; gap: .5rem; }
.join-row input {
  flex: 1; min-width: 0;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 8px; padding: .5rem .7rem; color: var(--text); font: inherit; font-size: .88rem;
}
.join-row input:focus { outline: none; border-color: var(--accent); }

.btn {
  background: linear-gradient(135deg, var(--accent), #5b5bd6);
  color: white; border: none; border-radius: 9px;
  padding: .55rem 1.1rem; font: inherit; font-weight: 600; cursor: pointer;
  display: inline-block;
}
.btn:hover { filter: brightness(1.12); text-decoration: none; }
.btn.small { padding: .4rem .85rem; font-size: .88rem; }
.btn.ghost {
  background: transparent; border: 1px solid var(--border); color: var(--text);
}
.btn.ghost:hover { border-color: var(--accent); }
.btn.disabled { background: var(--border); color: var(--muted); cursor: default; filter: none; }
.btn:disabled { opacity: .55; cursor: wait; }

.status-line { display: flex; align-items: center; gap: .5rem; border-top: 1px solid var(--border); padding-top: .7rem; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--warn); flex: none; }
.dot.up { background: var(--ok); }

.activity summary { cursor: pointer; user-select: none; }
.activity pre {
  margin: .5rem 0 0; max-height: 160px; overflow: auto;
  font-size: .74rem; line-height: 1.45; color: var(--muted);
  white-space: pre-wrap; word-break: break-all;
}

/* ---------- sections ---------- */

.section { max-width: 1120px; margin: 0 auto; padding: 3rem 1.4rem 1rem; }
.section-lede { color: var(--muted); max-width: 46rem; font-size: 1.05rem; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.step { position: relative; padding-top: 1.4rem; }
.step p { color: var(--muted); font-size: .95rem; margin: 0; }
.step-n {
  position: absolute; top: -0.8rem; left: 1.1rem;
  width: 1.9rem; height: 1.9rem; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; font-weight: 700; font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
}

.callout {
  margin-top: 1.4rem; padding: .9rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-radius: 0 10px 10px 0; color: var(--text);
}

.flow { display: flex; align-items: center; gap: 1rem; margin: 1.6rem 0 .6rem; }
.flow-node {
  flex: none; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 10px; padding: .8rem 1.2rem; font-weight: 600; font-size: .95rem;
}
.flow-edge { flex: 1; display: flex; flex-direction: column; align-items: center; gap: .25rem; }
.flow-line { width: 100%; height: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 1px; position: relative; }
.flow-line::after {
  content: ""; position: absolute; right: -1px; top: -4px;
  border: 5px solid transparent; border-left-color: var(--accent-2);
}
.flow-label { font-size: .8rem; color: var(--accent-2); }
.flow-relay { font-size: .74rem; color: var(--muted); }
.flow-caption { max-width: 44rem; margin-bottom: 1.6rem; }

.layers { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.layer p { color: var(--muted); font-size: .94rem; margin: 0; }
.layer h3 a { color: var(--text); }
.layer h3 a:hover { color: var(--accent-2); }

.downloads { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.dl p { color: var(--muted); font-size: .94rem; min-height: 3.4rem; }
.dl.featured { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.dl .btn { margin: .15rem .4rem .15rem 0; }
.cli-snippet {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: .6rem .8rem; margin: 0 0 .8rem; font-size: .82rem; overflow-x: auto;
}

footer {
  max-width: 1120px; margin: 0 auto; padding: 3rem 1.4rem 2.5rem;
  color: var(--muted); font-size: .88rem;
  border-top: 1px solid var(--border); margin-top: 3rem;
}

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

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 2.2rem; gap: 1.6rem; }
  .steps, .layers, .downloads { grid-template-columns: 1fr; }
  .nav-links { gap: .8rem; font-size: .85rem; flex-wrap: wrap; }
  .nav-links a:nth-child(3) { display: none; } /* keep the bar short on mobile */
  .flow { flex-wrap: wrap; }
  .flow-edge { min-width: 100px; }
  /* the drop link is one long unbreakable string — wrap it on small screens
     instead of letting it blow out the layout width */
  .link-row { flex-wrap: wrap; }
  .link-row code { flex-basis: 100%; white-space: normal; word-break: break-all; }
}