/* MikDrop - giao diện lấy cảm hứng từ AirDrop. Không phụ thuộc CDN để chạy được khi LAN không có Internet. */
:root {
  color-scheme: dark;
  --bg1: #0a0a0b;
  --bg2: #1c1008;
  --card: rgba(26, 24, 23, 0.8);
  --card-solid: #171514;
  --text: #fff4ec;
  --muted: #a1958b;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #ff7a2b;
  --accent2: #f4380f;
  --ok: #34c759;
  --danger: #ff453a;
  --shadow: 0 12px 34px rgba(0, 0, 0, 0.55);
  --ring: rgba(255, 106, 31, 0.24);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(120% 90% at 50% 0%, var(--bg2), var(--bg1) 60%) fixed;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.vh { position: fixed; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.muted { color: var(--muted); }

/* ---------- Bố cục ---------- */
.app {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: calc(14px + var(--safe-t)) 16px 0;
  max-width: 760px;
  margin: 0 auto;
}
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; }
.logo { width: 40px; height: 32px; display: block; object-fit: contain; filter: drop-shadow(0 4px 12px rgba(255, 106, 31, 0.35)); }
.brand-name { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; }

.status {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 999px;
  font-size: 13px; color: var(--muted); background: var(--card); border: 1px solid var(--line);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.status i { width: 8px; height: 8px; border-radius: 50%; background: #f5a524; }
.status.on i { background: var(--ok); box-shadow: 0 0 0 4px rgba(48, 185, 92, 0.18); }
.status.off i { background: var(--danger); }

.top-right { display: flex; align-items: center; gap: 8px; }
.qrbtn {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; color: var(--text);
  background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.qrbtn:hover { color: var(--accent); }
.qrbtn svg { width: 18px; height: 18px; }
.qr { background: #fff; border-radius: 20px; padding: 10px; width: min(250px, 66vw); margin: 18px auto 12px; box-shadow: var(--shadow); }
.qr img { display: block; width: 100%; height: auto; }
.qr.empty-qr { display: none; }
.invite-url { font-weight: 600; font-size: 15px; word-break: break-all; padding: 0 6px; }
.urls { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 10px; }
.urls .target { padding: 6px 12px; font-size: 13px; }
.speed-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 18px 0 6px; }
.speed-grid > div { background: var(--line); border-radius: 14px; padding: 12px 6px; display: flex; flex-direction: column; gap: 4px; }
.speed-grid .k { font-size: 12px; color: var(--muted); }
.speed-grid b { font-size: 17px; font-variant-numeric: tabular-nums; }
.speed-note { margin-top: 12px !important; font-size: 13.5px !important; line-height: 1.5; text-align: left; color: var(--muted); }
.speed-note strong { color: var(--text); }
.help { text-align: left; margin-top: 14px; font-size: 13px; color: var(--muted); }
.help summary { cursor: pointer; text-align: center; color: var(--accent); font-weight: 600; }
.help ul { margin: 10px 0 0; padding-left: 18px; line-height: 1.5; }
.help li { margin-bottom: 6px; }
.help code { display: block; margin-top: 4px; padding: 8px; border-radius: 8px; background: var(--line); color: var(--text); font-size: 12px; word-break: break-all; user-select: all; }
.empty .link { pointer-events: auto; margin-top: 6px; }
.banner {
  margin-top: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; border-radius: 14px; font-size: 14px;
  background: linear-gradient(135deg, rgba(255, 106, 31, 0.14), rgba(244, 56, 15, 0.14));
  border: 1px solid var(--ring);
}
.link { color: var(--accent); font-weight: 600; padding: 4px 2px; }

/* ---------- Radar ---------- */
.stage-wrap {
  flex: 1; min-height: 260px; display: grid; place-items: center; position: relative;
  container-type: size;
}
.stage {
  position: relative;
  width: min(92vw, 520px);
  width: min(100cqw, 100cqh);
  aspect-ratio: 1;
}
.ring, .wave {
  position: absolute; left: 50%; top: 50%; border-radius: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}
.ring { border: 1px solid var(--ring); }
.r1 { width: 36%; height: 36%; }
.r2 { width: 68%; height: 68%; }
.r3 { width: 100%; height: 100%; opacity: 0.6; }
.wave {
  width: 100%; height: 100%; background: radial-gradient(circle, transparent 38%, var(--ring) 100%);
  opacity: 0; transform: translate(-50%, -50%) scale(0.2); animation: pulse 4.2s cubic-bezier(0.2, 0.6, 0.3, 1) infinite;
}
.w2 { animation-delay: 1.4s; }
.w3 { animation-delay: 2.8s; }
@keyframes pulse {
  0% { opacity: 0.9; transform: translate(-50%, -50%) scale(0.2); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1); }
}
.me {
  position: absolute; left: 50%; top: 50%; width: 76px; height: 76px; margin: -38px 0 0 -38px; border-radius: 50%;
  display: grid; place-items: center; color: var(--accent);
  background: var(--card-solid); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.me svg { width: 34px; height: 34px; }

.peer {
  position: absolute; width: 116px; margin-left: -58px; margin-top: -42px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  animation: pop 0.45s cubic-bezier(0.2, 1.3, 0.4, 1) both; transition: transform 0.15s;
}
.peer:active { transform: scale(0.94); }
@keyframes pop { from { opacity: 0; transform: scale(0.3); } to { opacity: 1; transform: scale(1); } }
.avatar {
  width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; color: #fff; flex: none;
  background: linear-gradient(145deg, var(--accent), var(--accent2));
  box-shadow: 0 8px 20px rgba(255, 106, 31, 0.35); transition: box-shadow 0.2s, transform 0.2s;
}
.avatar svg { width: 30px; height: 30px; }
.avatar.big { width: 76px; height: 76px; margin: 0 auto 12px; }
.avatar.big svg { width: 36px; height: 36px; }
.peer:hover .avatar { transform: scale(1.06); }
.peer.drop .avatar { transform: scale(1.18); box-shadow: 0 0 0 7px var(--ring), 0 10px 24px rgba(255, 106, 31, 0.5); }
.peer .name {
  font-size: 13px; font-weight: 600; line-height: 1.2; max-width: 100%; padding: 3px 8px; border-radius: 10px;
  background: var(--card); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border: 1px solid var(--line);
}
.empty {
  position: absolute; left: 0; right: 0; bottom: 6px; margin: 0; text-align: center; font-size: 14px; color: var(--muted);
  padding: 0 24px; pointer-events: none;
}

/* ---------- Khay hoạt động ---------- */
.tray {
  max-height: 38vh; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 4px 0 10px;
  -webkit-overflow-scrolling: touch;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 12px 14px;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: var(--shadow);
  animation: rise 0.3s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
.card-row { display: flex; align-items: center; gap: 12px; }
.dir {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: rgba(255, 106, 31, 0.14); color: var(--accent);
}
.dir svg { width: 18px; height: 18px; stroke-width: 2.2; }
.card.done .dir { background: rgba(48, 185, 92, 0.16); color: var(--ok); }
.card.fail .dir { background: rgba(255, 69, 58, 0.14); color: var(--danger); }
.card-main { flex: 1; min-width: 0; }
.card-title { font-size: 14px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-meta { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.icon-btn { width: 30px; height: 30px; border-radius: 50%; color: var(--muted); display: grid; place-items: center; flex: none; }
.icon-btn:hover { background: var(--line); }
.icon-btn svg { width: 16px; height: 16px; stroke-width: 2.2; }
.bar { height: 6px; border-radius: 99px; background: var(--line); margin-top: 10px; overflow: hidden; }
.bar > i {
  display: block; height: 100%; width: 0; border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width 0.15s linear;
}
.card.done .bar > i { background: var(--ok); }
.bar.indeterminate > i { width: 35% !important; animation: slide 1.1s ease-in-out infinite; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(290%); } }
.got { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; max-width: 100%; padding: 4px 10px 4px 4px; border-radius: 99px;
  background: var(--line); font-size: 12.5px;
}
.chip img, .chip .ph {
  width: 26px; height: 26px; border-radius: 50%; object-fit: cover; background: var(--line); flex: none;
  display: grid; place-items: center;
}
.chip .ph svg { width: 14px; height: 14px; }
.chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 140px; }
.card .btn.small { margin-top: 10px; width: 100%; }

.foot { padding: 6px 0 calc(12px + var(--safe-b)); display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.room-tools { display: flex; justify-content: space-between; margin-top: 8px; font-size: 14px; }
.whoami {
  display: inline-flex; align-items: center; gap: 6px; max-width: 100%; font-size: 13.5px; color: var(--muted); padding: 8px 14px;
  border-radius: 99px; background: var(--card); border: 1px solid var(--line);
}
.whoami b { color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.whoami > span:not(#room-label) { white-space: nowrap; }
.whoami svg { width: 13px; height: 13px; flex: none; }
.whoami:hover { border-color: var(--accent); }
.tool-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.btn.danger { color: var(--danger); }
.dialog.wide { max-width: 460px; }
.msg-input {
  width: 100%; margin-top: 12px; padding: 10px 12px; font: inherit; font-size: 15px; color: var(--text); resize: none;
  border-radius: 12px; border: 1px solid var(--line); background: var(--bg1); outline: none;
}
.msg-input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.msg-text { margin-top: 10px; font-size: 14.5px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; max-height: 30vh; overflow-y: auto; }
.msg-text a { color: var(--accent); }
.dialog h3 { margin: 20px 0 6px; font-size: 15px; }
.steps { margin: 6px 0 10px; padding-left: 20px; font-size: 13.5px; line-height: 1.5; color: var(--muted); }
.steps li { margin: 5px 0; }
.steps b, .steps code { color: var(--text); }
.hint code, .steps code { font-size: 12px; padding: 1px 5px; border-radius: 6px; background: var(--line); word-break: break-all; }
.hint.warn { color: #f5a524; }
.copybox { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.copybox .k { flex: none; width: 74px; font-size: 12.5px; font-weight: 600; color: var(--muted); }
.copybox .copy {
  flex: 1; min-width: 0; text-align: left; padding: 9px 12px; border-radius: 10px; background: var(--bg1); border: 1px solid var(--line);
  font: 12.5px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--text); word-break: break-all; user-select: all;
}
.copybox .copy:hover { border-color: var(--accent); }
.install { display: flex; align-items: center; justify-content: center; text-decoration: none; margin: 10px 0 4px; }
#sh-manual > summary { cursor: pointer; color: var(--accent); font-size: 13.5px; font-weight: 600; padding: 6px 0; }

/* ---------- Nút ---------- */
.btn {
  min-height: 46px; padding: 0 22px; border-radius: 14px; font-weight: 600; font-size: 16px;
  background: var(--line); transition: transform 0.1s, opacity 0.15s;
}
.btn:active { transform: scale(0.97); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; box-shadow: 0 8px 20px rgba(255, 106, 31, 0.35); }
.btn.primary:disabled { opacity: 0.4; box-shadow: none; cursor: not-allowed; }
.btn.small { min-height: 38px; font-size: 14px; padding: 0 16px; }
.actions { display: flex; gap: 10px; margin-top: 18px; }
.actions .btn { flex: 1; }

/* ---------- Lớp phủ, bảng, hộp thoại ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 50; display: flex; align-items: flex-end; justify-content: center;
  background: rgba(8, 12, 24, 0.42); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  animation: fade 0.2s ease both;
}
.overlay.center { align-items: center; padding: 20px; }
@keyframes fade { from { opacity: 0; } }
.sheet, .dialog {
  width: 100%; background: var(--card-solid); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.sheet {
  max-width: 520px; max-height: 88dvh; overflow-y: auto; border-radius: 26px 26px 0 0;
  padding: 10px 20px calc(20px + var(--safe-b)); animation: up 0.28s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}
@keyframes up { from { transform: translateY(40px); opacity: 0; } }
.grabber { width: 38px; height: 5px; border-radius: 9px; background: var(--line); margin: 0 auto 14px; }
.sheet-head { display: flex; align-items: center; gap: 14px; }
.sheet-head .avatar { width: 52px; height: 52px; }
.sheet-head h2 { margin: 0; font-size: 18px; }
.sheet-head p { margin: 3px 0 0; font-size: 13.5px; color: var(--muted); }
.targets { display: flex; gap: 8px; overflow-x: auto; margin-top: 16px; padding-bottom: 4px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.targets::-webkit-scrollbar { display: none; }
.target {
  flex: none; display: inline-flex; align-items: center; gap: 8px; max-width: 200px; padding: 5px 14px 5px 5px; border-radius: 99px;
  background: var(--line); border: 1.5px solid transparent; font-size: 14px; font-weight: 500; transition: background 0.15s, border-color 0.15s;
}
.target .mini { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--line); color: var(--muted); flex: none; }
.target .mini svg { width: 16px; height: 16px; }
.target .tn { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.target.on { background: rgba(255, 106, 31, 0.16); border-color: var(--accent); }
.target.on .mini { background: linear-gradient(145deg, var(--accent), var(--accent2)); color: #fff; }
.target.all { padding: 5px 14px; color: var(--accent); font-weight: 600; background: none; }
.pick-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(90px, 1fr)); gap: 10px; margin-top: 18px; }
.pick {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 16px 8px; border-radius: 16px;
  background: var(--line); font-weight: 600; font-size: 14.5px; transition: transform 0.1s, background 0.15s;
}
.pick:hover { background: var(--ring); }
.pick:active { transform: scale(0.97); }
.pick svg { width: 26px; height: 26px; color: var(--accent); }
.file-list { display: flex; flex-direction: column; gap: 6px; margin-top: 14px; max-height: 32vh; overflow-y: auto; }
.file-row { display: flex; align-items: center; gap: 12px; padding: 6px; border-radius: 12px; }
.thumb {
  width: 42px; height: 42px; border-radius: 10px; background: var(--line); flex: none; overflow: hidden;
  display: grid; place-items: center; color: var(--muted);
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb svg { width: 20px; height: 20px; }
.file-row .info { flex: 1; min-width: 0; }
.file-row .fn { font-size: 14px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .fs { font-size: 12.5px; color: var(--muted); }
.sheet-empty {
  margin-top: 14px; padding: 22px; text-align: center; font-size: 14px; color: var(--muted);
  border: 1.5px dashed var(--line); border-radius: 16px;
}

.dialog { max-width: 400px; border-radius: 26px; padding: 26px 22px 20px; text-align: center; animation: zoom 0.25s cubic-bezier(0.2, 1.2, 0.4, 1) both; }
.dialog { max-height: 92dvh; overflow-y: auto; }
.dialog.small { text-align: left; }
@keyframes zoom { from { transform: scale(0.88); opacity: 0; } }
.dialog h2 { margin: 0 0 4px; font-size: 19px; line-height: 1.3; }
.dialog p { margin: 0; font-size: 14px; }
.dialog input {
  width: 100%; margin-top: 14px; padding: 12px 14px; font: inherit; font-size: 16px; color: var(--text);
  border-radius: 12px; border: 1px solid var(--line); background: var(--bg1); outline: none;
}
.dialog input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.field-label { display: block; margin-top: 18px; font-size: 12.5px; font-weight: 600; letter-spacing: 0.02em; color: var(--muted); }
.field-label + input { margin-top: 8px; }
.seg { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.seg .target { max-width: none; padding: 9px 18px; }
.dialog .hint { margin-top: 8px; font-size: 12.5px; line-height: 1.45; }
#use-machine { display: block; margin-top: 8px; }
.previews { display: flex; justify-content: center; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.previews .pv {
  width: 74px; height: 74px; border-radius: 14px; overflow: hidden; background: var(--line);
  display: grid; place-items: center; font-weight: 700; color: var(--muted); font-size: 16px;
}
.previews .pv img { width: 100%; height: 100%; object-fit: cover; }
.names { list-style: none; margin: 14px 0 0; padding: 0; font-size: 13.5px; color: var(--muted); }
.names li { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 2px 0; }
.queue { margin-top: 12px !important; font-size: 12.5px !important; color: var(--muted); }

/* ---------- Kéo thả, thông báo ---------- */
.dropveil {
  position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; pointer-events: none;
  background: rgba(255, 106, 31, 0.12); border: 3px dashed var(--accent); margin: 10px; border-radius: 28px;
  inset: 0;
}
.dropveil div { padding: 14px 24px; border-radius: 99px; background: var(--card-solid); font-weight: 600; box-shadow: var(--shadow); }
.toasts {
  position: fixed; left: 0; right: 0; top: calc(12px + var(--safe-t)); z-index: 80; display: flex; flex-direction: column;
  align-items: center; gap: 8px; pointer-events: none;
}
.toast {
  max-width: min(92vw, 420px); padding: 11px 16px; border-radius: 14px; font-size: 14px; color: #fff;
  background: rgba(20, 24, 38, 0.92); box-shadow: var(--shadow); animation: rise 0.25s ease both;
}
.toast.err { background: rgba(214, 48, 40, 0.95); }

@media (max-width: 480px) {
  .peer { width: 104px; margin-left: -52px; }
  .avatar { width: 58px; height: 58px; }
  .me { width: 68px; height: 68px; margin: -34px 0 0 -34px; }
}
@media (prefers-reduced-motion: reduce) {
  .wave, .peer, .card, .sheet, .dialog { animation: none; }
}