:root {
  --bg: #0b0e17;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.09);
  --text: #eef1f8;
  --muted: #9aa4bd;
  --accent1: #6366f1;
  --accent2: #22d3ee;
  --err: #ff5d5d;
  --ok: #3ecf8e;
  --grad: linear-gradient(135deg, var(--accent1), var(--accent2));
  --radius: 16px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 400px at 15% -10%, rgba(99,102,241,.22), transparent 60%),
    radial-gradient(500px 350px at 95% 5%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(99,102,241,.10), transparent 60%);
}

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 48px 20px 26px; }
.hero-inner { max-width: 760px; margin: 0 auto; }
.hero-top {
  display: flex; align-items: center; justify-content: space-between; max-width: 760px;
  margin: 0 auto 22px;
}
.hero-controls { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
  border-radius: 11px; background: var(--panel); border: 1px solid var(--panel-border);
  color: var(--text); cursor: pointer; font-size: .8rem; font-weight: 700;
}
.icon-btn:hover { border-color: var(--accent2); }
.avatar-btn {
  width: 38px; height: 38px; border-radius: 50%; overflow: hidden; padding: 0;
  background: var(--grad); border: 1px solid var(--panel-border); cursor: pointer;
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800;
}
.avatar-btn img { width: 100%; height: 100%; object-fit: cover; }
.logo {
  display: inline-flex; align-items: center; gap: 10px; font-weight: 800;
  font-size: 1.35rem; letter-spacing: -0.02em; margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem); font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.1;
}
.hero h1 em {
  font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tagline { color: var(--muted); margin-top: 12px; font-size: 1.05rem; }

.steps {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  margin-top: 30px; flex-wrap: wrap;
}
.step {
  display: flex; align-items: center; gap: 10px; background: var(--panel);
  border: 1px solid var(--panel-border); border-radius: 14px; padding: 12px 18px;
  backdrop-filter: blur(8px);
}
.step-ico {
  width: 30px; height: 30px; border-radius: 9px; background: var(--grad);
  display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff;
}
.step strong { display: block; font-size: .95rem; }
.step span { color: var(--muted); font-size: .8rem; }
.step-arrow { color: var(--muted); font-size: 1.1rem; }

/* ---------- Main ---------- */
main { max-width: 560px; margin: 10px auto 30px; padding: 0 16px; }
.tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 14px; padding: 6px;
}
.tab {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px; border: none; border-radius: 10px;
  background: transparent; color: var(--muted); cursor: pointer; font-size: .95rem;
  font-weight: 600; transition: all .2s;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--grad); color: #fff; box-shadow: 0 4px 18px rgba(99,102,241,.35);
}

.panel {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: var(--radius); padding: 22px;
  backdrop-filter: blur(14px); box-shadow: var(--shadow);
  animation: rise .3s ease;
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
[hidden] { display: none !important; }

/* ---------- Dropzone ---------- */
.dropzone {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  border: 2px dashed rgba(255,255,255,.18); border-radius: 14px;
  padding: 34px 20px; text-align: center; color: var(--muted); cursor: pointer;
  transition: all .2s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent2); color: var(--accent2); background: rgba(34,211,238,.05); }
.dropzone.drag { border-style: solid; }
.dz-main { color: var(--text); font-weight: 600; font-size: 1.02rem; }
.dz-sub { font-size: .8rem; }
.camera-hint { margin-top: 4px; }
.link-btn {
  background: transparent; border: none; color: var(--accent2); cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px; font-size: .85rem; padding: 4px 8px;
}
.link-btn:hover { text-decoration: underline; }

/* ---------- Form ---------- */
.row { display: flex; gap: 12px; margin-top: 16px; align-items: flex-end; flex-wrap: wrap; }
label { flex: 1; font-size: .82rem; color: var(--muted); font-weight: 500; }
input, select {
  width: 100%; margin-top: 6px; padding: 11px 13px; border-radius: 11px;
  border: 1px solid var(--panel-border); background: rgba(255,255,255,.05); color: var(--text);
  font-size: .95rem; font-family: inherit; transition: border .15s;
}
input:focus, select:focus { outline: none; border-color: var(--accent2); }
button {
  font-family: inherit; padding: 11px 18px; border: none; border-radius: 11px;
  cursor: pointer; font-size: .95rem; font-weight: 600; transition: all .18s;
}
.btn-primary {
  background: var(--grad); color: #fff; display: inline-flex; align-items: center; gap: 7px;
  box-shadow: 0 4px 18px rgba(99,102,241,.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 22px rgba(99,102,241,.5); }
.btn-primary:disabled { opacity: .4; transform: none; cursor: not-allowed; box-shadow: none; }
.btn-ghost {
  background: transparent; border: 1px solid var(--panel-border); color: var(--text); padding: 6px 12px; font-size: .8rem;
}
.btn-ghost:hover { border-color: var(--accent2); }

/* ---------- Progress ring ---------- */
.progress-wrap { display: flex; align-items: center; gap: 18px; margin-top: 20px; justify-content: center; }
.ring { transform: rotate(-90deg); }
.ring-bg, .ring-fg { fill: none; stroke-width: 6; }
.ring-bg { stroke: rgba(255,255,255,.08); }
.ring-fg { stroke: var(--accent2); stroke-linecap: round; transition: stroke-dashoffset .15s; }
.ring-label { display: flex; flex-direction: column; align-items: flex-start; }
#ring-pct { font-size: 1.5rem; font-weight: 800; }
#ring-meta { color: var(--muted); font-size: .8rem; }

/* ---------- Status / Result ---------- */
.status { margin-top: 14px; color: var(--muted); min-height: 1.2em; font-size: .9rem; }
.status.err { color: var(--err); }
.status.ok { color: var(--ok); }
.result {
  margin-top: 16px; padding: 16px; background: rgba(255,255,255,.04);
  border: 1px solid var(--panel-border); border-radius: 12px; word-break: break-word;
}
.result p { margin: 4px 0; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.result a { color: var(--accent2); text-decoration: none; }
.result a:hover { text-decoration: underline; }
#qr, #qr-room { margin-top: 14px; display: flex; justify-content: center; }
#qr img, #qr canvas, #qr-room img, #qr-room canvas { background: #fff; border-radius: 8px; padding: 6px; }

/* ---------- Room list ---------- */
.list { margin-top: 12px; display: flex; flex-direction: column; gap: 9px; }
.room-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 12px 14px; background: rgba(255,255,255,.04);
  border: 1px solid var(--panel-border); border-radius: 12px; transition: border .15s;
}
.room-item:hover { border-color: rgba(34,211,238,.4); }
.room-item div { min-width: 0; overflow: hidden; }
.room-item strong { word-break: break-all; display: block; }
.room-item .file-meta { display: flex; align-items: center; gap: 8px; margin-top: 3px; }
.room-item a { color: var(--accent2); text-decoration: none; font-size: .9rem; }
.room-item a.dl {
  background: var(--grad); color: #fff; padding: 8px 14px; border-radius: 9px;
  white-space: nowrap; font-weight: 600; display: inline-flex; align-items: center; gap: 6px;
}
.btn-small {
  padding: 6px 11px; font-size: .78rem; background: transparent;
  border: 1px solid rgba(255,93,93,.5); color: var(--err); border-radius: 8px;
}
.file-actions { display: flex; align-items: center; gap: 8px; }
.dl.small { padding: 6px 11px; font-size: .8rem; }
.muted { color: var(--muted); }
.room-title { margin-bottom: 10px; font-size: 1.15rem; display: flex; align-items: center; gap: 10px; }
.badge {
  font-size: .68rem; font-weight: 700; padding: 2px 8px; border-radius: 20px;
  background: var(--grad); color: #fff; text-transform: uppercase; letter-spacing: .03em;
}
.badge.expired { background: rgba(255,93,93,.25); color: var(--err); }

/* ---------- History / Analytics ---------- */
.history-block { margin-top: 18px; }
.h-title { font-weight: 700; font-size: .9rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 10px; }
.analytics { margin-top: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat {
  background: rgba(255,255,255,.04); border: 1px solid var(--panel-border);
  border-radius: 12px; padding: 14px; text-align: center;
}
.stat strong { display: block; font-size: 1.6rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--muted); font-size: .78rem; }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal-box {
  width: 100%; max-width: 380px; padding: 26px;
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: var(--radius); backdrop-filter: blur(14px); box-shadow: var(--shadow);
  animation: rise .25s ease;
}
.modal-box h3 { margin-bottom: 18px; font-size: 1.2rem; }
.modal-box label { display: block; flex: none; margin-top: 14px; }
.modal-box label + label { margin-top: 14px; }
.modal-box input[type="file"] { padding: 8px; }
.avatar-big {
  width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 4px;
  background: var(--grad); color: #fff; font-size: 2rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.avatar-big img { width: 100%; height: 100%; object-fit: cover; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; justify-content: flex-end; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: #1a1f2e; border: 1px solid var(--panel-border); color: var(--text);
  padding: 12px 20px; border-radius: 12px; box-shadow: var(--shadow);
  font-size: .9rem; z-index: 99; animation: toastin .25s ease;
}
.toast.ok { border-color: rgba(62,207,142,.5); }
.toast.err { border-color: rgba(255,93,93,.5); color: var(--err); }
@keyframes toastin { from { opacity: 0; transform: translateX(-50%) translateY(10px); } to { opacity: 1; transform: translateX(-50%); } }

.foot { text-align: center; color: var(--muted); font-size: .8rem; padding: 20px 0 34px; }

@media (max-width: 460px) {
  .steps { gap: 8px; }
  .step-arrow { display: none; }
  .panel { padding: 16px; }
  main { padding: 0 12px; }
}

/* ---------- Light theme ---------- */
[data-theme="light"] {
  --bg: #eef1fb;
  --panel: rgba(255,255,255,.7);
  --panel-border: rgba(15,23,42,.12);
  --text: #0f172a;
  --muted: #5b6478;
  --shadow: 0 12px 40px rgba(15,23,42,.10);
}
[data-theme="light"] .bg-glow {
  background:
    radial-gradient(600px 400px at 15% -10%, rgba(99,102,241,.16), transparent 60%),
    radial-gradient(500px 350px at 95% 5%, rgba(34,211,238,.14), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(99,102,241,.08), transparent 60%);
}
[data-theme="light"] input, [data-theme="light"] select {
  background: rgba(15,23,42,.04); border-color: rgba(15,23,42,.15);
}
[data-theme="light"] .room-item, [data-theme="light"] .result, [data-theme="light"] .stat {
  background: rgba(15,23,42,.04);
}
[data-theme="light"] .toast { background: #fff; }