:root {
  --navy: #0b2a5b;
  --navy-2: #143a76;
  --orange: #f0821e;
  --orange-dk: #d96c0a;
  --ink: #14243d;
  --muted: #5d6f8a;
  --line: #d8e1ef;
  --bg: #eef3fa;
  --card: #ffffff;
  --ok: #157347;
  --err: #c02626;
  --warn: #a8620a;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(11, 42, 91, .08);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.wrap { width: min(1180px, 100%); margin: 0 auto; padding: 0 14px; }

.hidden { display: none !important; }

/* ------------------------------------------------------------- header */

.site-header {
  background: linear-gradient(110deg, var(--navy) 0%, var(--navy-2) 60%, #1d4d94 100%);
  color: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }

.brand-mark {
  background: var(--orange);
  color: #fff;
  font-weight: 800;
  letter-spacing: .5px;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 15px;
  white-space: nowrap;
}

.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-text strong { font-size: 15px; line-height: 1.25; }
.brand-text span { font-size: 12px; opacity: .82; }

.track-chip {
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .35);
}

.track-chip.expert { background: var(--orange); border-color: var(--orange); }

/* ------------------------------------------------- expert-only markers */

.expert-ribbon {
  background: repeating-linear-gradient(135deg, #f0821e, #f0821e 14px, #d96c0a 14px, #d96c0a 28px);
  color: #fff;
  text-align: center;
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 13px;
  padding: 6px 10px;
}

.expert-float {
  position: fixed;
  right: 14px;
  bottom: 88px;
  z-index: 40;
  background: #fff;
  border: 2px solid var(--orange);
  border-left-width: 8px;
  border-radius: 12px;
  padding: 10px 14px;
  max-width: min(260px, calc(100vw - 28px));
  box-shadow: 0 8px 24px rgba(11, 42, 91, .22);
  animation: pulse 2.6s ease-in-out infinite;
}

.expert-float-title {
  display: block;
  font-weight: 800;
  color: var(--orange-dk);
  font-size: 14px;
}

.expert-float-sub { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }

@keyframes pulse {
  0%, 100% { box-shadow: 0 8px 24px rgba(240, 130, 30, .25); }
  50% { box-shadow: 0 8px 30px rgba(240, 130, 30, .55); }
}

@media (prefers-reduced-motion: reduce) { .expert-float { animation: none; } }

/* --------------------------------------------------------------- cards */

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin: 14px 0;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 17px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-num {
  background: var(--navy);
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-size: 13px;
  flex: none;
}

.note { color: var(--muted); font-size: 13px; margin: 6px 0 0; }

/* -------------------------------------------------------------- fields */

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 700px) { .field-row { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.field > span { font-weight: 600; }
.field em { font-style: normal; color: var(--muted); font-weight: 400; font-size: 12px; }

input[type=text], input[type=password], input[type=datetime-local],
input[type=number], select {
  font: inherit;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fbfdff;
  color: var(--ink);
  width: 100%;
}

input:focus, select:focus, button:focus-visible {
  outline: 3px solid rgba(20, 58, 118, .25);
  border-color: var(--navy-2);
}

input.invalid { border-color: var(--err); background: #fff6f6; }

.hint { color: var(--muted); font-size: 12px; }
.hint.bad { color: var(--err); font-weight: 600; }

/* ------------------------------------------------------------- banners */

.banner {
  border-radius: 10px;
  padding: 10px 14px;
  margin: 12px 0;
  font-size: 13.5px;
  border: 1px solid;
}

.banner.error { background: #fdeceb; border-color: #f3b6b3; color: #8d1c1c; }
.banner.warn { background: #fff5e5; border-color: #f3d4a0; color: #8a5a09; }
.banner.info { background: #eaf2ff; border-color: #b9d1f5; color: #10396f; }
.banner.ok { background: #e9f7ef; border-color: #a9dcbf; color: #0f5132; }

/* -------------------------------------------------------------- awards */

.award-list.locked {
  opacity: .5;
  pointer-events: none;
  filter: grayscale(.6);
}

.award {
  border: 1px solid var(--line);
  border-radius: 11px;
  margin-top: 12px;
  overflow: hidden;
  background: #fff;
}

.award-head {
  width: 100%;
  display: grid;
  grid-template-columns: 30px minmax(150px, 1fr) minmax(0, 1.4fr) 22px;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: #f6f9fe;
  border: 0;
  border-left: 5px solid var(--navy);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.award-head.open { background: #eaf1fb; }
.award-head:hover { background: #e6eefb; }

.award-index {
  background: var(--orange);
  color: #fff;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 13px;
}

.award-names { display: flex; flex-direction: column; min-width: 0; }
.award-names strong { font-size: 15px; color: var(--navy); }
.award-names em { font-style: normal; font-size: 13px; color: var(--muted); }

.award-pick {
  font-size: 13px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.award-pick.has-pick {
  color: var(--ok);
  font-weight: 700;
}

.chev { color: var(--muted); transition: transform .18s; }
.award-head.open .chev { transform: rotate(180deg); }

.award-body { display: none; padding: 12px; border-top: 1px solid var(--line); }
.award-body.open { display: block; }

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 10px;
}

.topic {
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: border-color .15s, box-shadow .15s, background .15s;
  min-height: 92px;
}

.topic:hover:not(:disabled) { border-color: var(--navy-2); box-shadow: var(--shadow); }

.topic-meta { font-size: 11.5px; color: var(--orange-dk); font-weight: 700; }
.topic-title { font-size: 14px; font-weight: 600; line-height: 1.35; }
.topic-presenters { font-size: 12px; color: var(--muted); }
.topic-flag { font-size: 11.5px; font-weight: 700; color: var(--ok); min-height: 14px; }

.topic.selected {
  border: 2px solid var(--ok);
  background: #f2fbf6;
}

.topic.taken {
  background: #f1f3f7;
  color: #9aa6b8;
  cursor: not-allowed;
  border-style: dashed;
}

.topic.taken .topic-meta,
.topic.taken .topic-presenters { color: #a8b2c2; }
.topic.taken .topic-flag { color: #8b95a6; font-weight: 600; }

/* ----------------------------------------------------------- submitbar */

.footer-space { height: 90px; }

.submitbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, .97);
  border-top: 1px solid var(--line);
  box-shadow: 0 -3px 14px rgba(11, 42, 91, .1);
  z-index: 35;
  padding-bottom: env(safe-area-inset-bottom);
}

.submitbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
}

.progress { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.progress strong { font-size: 20px; color: var(--navy); }
.dots { display: flex; gap: 5px; }

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d6dfec;
  border: 1px solid #c3cede;
}

.dot.on { background: var(--ok); border-color: var(--ok); }

.btn {
  font: inherit;
  font-weight: 700;
  border-radius: 10px;
  padding: 12px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  background: #eef2f8;
  color: var(--ink);
}

.btn.primary { background: var(--orange); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--orange-dk); }
.btn.navy { background: var(--navy); color: #fff; }
.btn.navy:hover:not(:disabled) { background: var(--navy-2); }
.btn.ghost { background: #fff; border-color: var(--line); }
.btn.danger { background: #fdeceb; color: #8d1c1c; border-color: #f3b6b3; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.sm { padding: 7px 12px; font-size: 13px; }

/* ------------------------------------------------------------- overlay */

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 42, 91, .55);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 60;
}

.done-card {
  background: #fff;
  border-radius: 14px;
  padding: 22px;
  width: min(560px, 100%);
  max-height: 88vh;
  overflow: auto;
  text-align: center;
}

.done-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--ok);
  color: #fff;
  font-size: 30px;
  display: grid;
  place-items: center;
  margin: 0 auto 10px;
}

.done-card h2 { margin: 0 0 8px; }
.done-list { list-style: none; padding: 0; margin: 14px 0; text-align: left; }

.done-list li {
  border-top: 1px solid var(--line);
  padding: 8px 0;
  display: flex;
  flex-direction: column;
}

.done-list span { font-size: 12px; color: var(--muted); }

/* --------------------------------------------------------------- admin */

.admin-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 14px;
}

.admin-nav a {
  color: #fff;
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .14);
  font-size: 13.5px;
  font-weight: 600;
}

.admin-nav a.active, .admin-nav a:hover { background: var(--orange); }
.admin-nav form { margin-left: auto; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f4f8fd; color: var(--navy); font-size: 12.5px; text-transform: uppercase; letter-spacing: .3px; }
tbody tr:hover { background: #fafcff; }
td.num, th.num { text-align: right; white-space: nowrap; }
.table-scroll { overflow-x: auto; }

.winner { background: #f2fbf6 !important; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 700; }
.badge.win { background: var(--ok); color: #fff; }
.badge.trial { background: #fff5e5; color: var(--warn); border: 1px solid #f3d4a0; }
.badge.official { background: #e9f7ef; color: var(--ok); border: 1px solid #a9dcbf; }

.qr-box { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.qr-box img { width: 190px; height: 190px; border: 1px solid var(--line); border-radius: 10px; background: #fff; padding: 6px; }
.url-line { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13px; word-break: break-all; background: #f4f8fd; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.tabs a { text-decoration: none; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-size: 13.5px; font-weight: 600; }
.tabs a.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 20px; background: linear-gradient(140deg, var(--navy), #1d4d94); }
.login-card { background: #fff; border-radius: 14px; padding: 26px; width: min(400px, 100%); box-shadow: 0 12px 40px rgba(0, 0, 0, .25); }
.login-card h1 { margin: 0 0 4px; font-size: 20px; color: var(--navy); }
.login-card p.sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.login-card .field { margin-bottom: 14px; }
.login-card .btn { width: 100%; }

.index-shell { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 24px; }

/* ---------------------------------------------------- phone refinements */

@media (max-width: 620px) {
  .award-head {
    grid-template-columns: 26px 1fr 18px;
    row-gap: 4px;
    padding: 10px;
  }

  .award-pick { grid-column: 2 / span 1; }
  .topic { min-height: 0; }
  .topic-grid { grid-template-columns: 1fr; }
  .card { padding: 13px; }
  .progress { font-size: 12px; }
  .progress strong { font-size: 18px; }
  .submitbar-inner { padding: 8px 12px; gap: 8px; }
  .btn { padding: 12px 14px; }
  .expert-ribbon { font-size: 12px; letter-spacing: .5px; }
  .expert-float { bottom: 78px; padding: 8px 12px; }
  .brand-text strong { font-size: 14px; }
  .track-chip { font-size: 12px; padding: 5px 11px; }
}