:root {
  color-scheme: light dark;
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #65728a;
  --line: #d9e0ea;
  --blue: #1685d9;
  --blue-dark: #0e5f9d;
  --green: #14a36f;
  --green-soft: #dff7ed;
  --red: #d94b4b;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --soft-shadow: 0 6px 18px rgba(23, 32, 51, 0.05);
  --shadow: 0 12px 30px rgba(23, 32, 51, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141c;
    --panel: #161d28;
    --ink: #edf2f7;
    --muted: #a7b3c5;
    --line: #2d3848;
    --blue: #4ea7e8;
    --blue-dark: #83c9ff;
    --green: #48c78e;
    --green-soft: #123626;
    --red: #ff6b6b;
    --surface: rgba(22, 29, 40, 0.94);
    --surface-strong: rgba(22, 29, 40, 0.94);
    --soft-shadow: 0 10px 26px rgba(0, 0, 0, 0.32);
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(22, 133, 217, 0.18), transparent 34rem),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app {
  width: min(1380px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.95;
}

.summary {
  min-width: 150px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: right;
}

.summary strong {
  font-size: 2rem;
}

.summary span {
  color: var(--muted);
  font-weight: 700;
}

.summary small {
  display: block;
  color: var(--green);
  font-weight: 800;
}

.mini-summary {
  min-height: 42px;
  min-width: 128px;
  display: grid;
  align-content: center;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  text-align: right;
}

.mini-summary strong {
  font-size: 1rem;
}

.mini-summary span,
.mini-summary small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.mini-summary small {
  color: var(--green);
}

.tracker-sticky {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  padding: 12px;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.controls {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto auto auto auto auto auto;
  gap: 10px;
  align-items: end;
}

.auth-panel {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(320px, auto) auto auto auto;
  gap: 10px;
  align-items: start;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--soft-shadow);
}

.auth-status {
  min-height: 42px;
  display: grid;
  align-content: center;
}

.auth-status strong {
  font-size: 0.95rem;
}

.auth-status span,
.app-message {
  color: var(--muted);
  font-size: 0.86rem;
}

.auth-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
}

.stacked-form {
  display: grid;
  gap: 8px;
  min-width: 220px;
  padding-top: 10px;
}

.auth-form input,
.stacked-form input,
.stacked-form select,
.group-form input,
.group-form select,
.message-form input {
  min-height: 42px;
  width: 100%;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  outline: none;
  background: var(--panel);
  color: var(--ink);
}

.auth-form input:focus,
.stacked-form input:focus,
.stacked-form select:focus,
.group-form input:focus,
.group-form select:focus,
.message-form input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(22, 133, 217, 0.16);
}

.auth-extra {
  position: relative;
}

.auth-extra summary {
  min-height: 42px;
  display: grid;
  place-items: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.auth-extra summary::-webkit-details-marker {
  display: none;
}

.auth-extra[open] .stacked-form {
  position: absolute;
  right: 0;
  z-index: 10;
  margin-top: 6px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.primary {
  min-height: 42px;
  padding: 0 16px;
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  color: white;
  cursor: pointer;
  font-weight: 900;
}

.app-message {
  min-height: 20px;
  margin: 0 0 10px;
  font-weight: 700;
}

.app-message.is-error {
  color: var(--red);
}

.is-hidden {
  display: none !important;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.tab {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-weight: 900;
}

.tab.is-active {
  border-color: var(--blue);
  background: var(--blue);
  color: white;
}

.search span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.search input {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  outline: none;
}

.search input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(22, 133, 217, 0.16);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.segment,
.ghost,
.danger,
.file-action {
  min-height: 42px;
  border: 0;
  cursor: pointer;
  font-weight: 800;
}

.segment {
  padding: 0 14px;
  background: color-mix(in srgb, var(--panel) 92%, var(--ink));
  color: var(--muted);
}

.segment + .segment {
  border-left: 1px solid var(--line);
}

.segment.is-active {
  background: var(--blue);
  color: white;
}

.ghost,
.danger,
.file-action {
  display: inline-grid;
  place-items: center;
  min-width: 86px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
}

.ghost.is-active {
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 18%, var(--panel));
  color: var(--blue-dark);
}

.danger {
  color: var(--red);
}

.file-action input {
  display: none;
}

.progress-wrap {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 78%, var(--ink));
}

.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--blue));
  transition: width 180ms ease;
}

.album {
  display: grid;
  gap: 14px;
}

.group {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--soft-shadow);
}

.group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.group h2 {
  margin: 0;
  font-size: 1.05rem;
}

.group p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.group-count {
  color: var(--blue-dark);
  font-weight: 900;
}

.stickers {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 8px;
}

.sticker {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
  transition:
    background 140ms ease,
    border-color 140ms ease,
    color 140ms ease,
    transform 140ms ease;
}

.sticker:hover {
  transform: translateY(-1px);
  border-color: var(--blue);
}

.sticker.is-owned {
  border-color: var(--green);
  background: var(--green-soft);
  color: var(--green);
}

.sticker.is-owned::after {
  content: " ✓";
}

.sticker.is-duplicate {
  border-color: var(--duplicate-border, #d99b16);
  background: var(--duplicate-bg, #fff2cf);
  color: var(--duplicate-ink, #8a5d00);
}

.sticker.is-duplicate::after {
  content: " ×2";
}

.social-toolbar,
.messages-layout,
.match-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--soft-shadow);
}

.social-toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(360px, 560px);
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  padding: 12px;
}

.social-toolbar span,
.trade-columns span,
.empty {
  color: var(--muted);
  font-size: 0.86rem;
}

.admin-panel {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--soft-shadow);
}

.admin-dashboard {
  display: grid;
  gap: 14px;
}

.admin-dashboard header,
.admin-stats {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

.admin-stats {
  grid-template-columns: repeat(3, 1fr);
}

.admin-stats article {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.admin-stats strong {
  display: block;
  font-size: 1.6rem;
}

.admin-stats span {
  color: var(--muted);
  font-weight: 800;
}

.admin-dashboard h2 {
  margin: 4px 0 0;
  font-size: 1rem;
}

.admin-table {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.admin-table table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.admin-table th,
.admin-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 0.86rem;
}

.admin-table th {
  background: color-mix(in srgb, var(--blue) 12%, var(--panel));
  color: var(--ink);
}

.membership {
  display: block;
  margin-top: 4px;
}

.group-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
}

.matches {
  display: grid;
  gap: 12px;
}

.match-card {
  padding: 14px;
}

.match-card header,
.trade-columns {
  display: grid;
  gap: 12px;
}

.match-card header {
  grid-template-columns: 1fr auto;
  align-items: center;
  margin-bottom: 12px;
}

.trade-columns {
  grid-template-columns: repeat(2, 1fr);
}

.trade-columns p {
  margin: 4px 0 0;
  font-weight: 800;
  line-height: 1.5;
}

.trade-details {
  margin-top: 12px;
}

.trade-details summary {
  cursor: pointer;
  color: var(--blue-dark);
  font-weight: 900;
}

.trade-details div {
  display: grid;
  gap: 6px;
  max-height: 220px;
  margin-top: 10px;
  overflow: auto;
  padding: 10px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--panel) 92%, var(--ink));
}

.trade-details p {
  margin: 0 0 8px;
  line-height: 1.5;
}

.messages-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 520px;
  overflow: hidden;
}

.message-people {
  display: grid;
  align-content: start;
  gap: 6px;
  padding: 12px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 92%, var(--ink));
}

.message-people button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  text-align: left;
}

.message-thread {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 520px;
}

.message-thread header {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  font-weight: 900;
}

.message-list {
  display: grid;
  align-content: start;
  gap: 10px;
  max-height: 420px;
  overflow: auto;
  padding: 12px;
}

.message-bubble {
  max-width: 76%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.message-bubble.is-mine {
  justify-self: end;
  border-color: var(--green);
  background: var(--green-soft);
}

.message-bubble p {
  margin: 4px 0;
}

.message-bubble span {
  color: var(--muted);
  font-size: 0.74rem;
}

.message-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--line);
}

@media (prefers-color-scheme: dark) {
  .sticker {
    background: #111827;
    color: #f2f6fb;
  }

  .sticker.is-owned {
    background: #0f3f2d;
    color: #72e0ae;
  }

  .sticker.is-duplicate {
    --duplicate-border: #c9902a;
    --duplicate-bg: #4a3411;
    --duplicate-ink: #ffd27a;
  }

  .message-people,
  .trade-details div {
    background: #111827;
  }

  .admin-table th {
    background: #1f3144;
  }
}

@media (max-width: 760px) {
  .app {
    width: min(100% - 20px, 1380px);
    padding-top: 18px;
  }

  .topbar {
    align-items: stretch;
  }

  .summary {
    min-width: 118px;
  }

  .controls {
    grid-template-columns: 1fr 1fr;
  }

  .tabs,
  .social-toolbar,
  .group-form,
  .trade-columns,
  .messages-layout,
  .message-form {
    grid-template-columns: 1fr;
  }

  .admin-stats {
    grid-template-columns: 1fr;
  }

  .message-people {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .auth-panel {
    grid-template-columns: 1fr;
  }

  .auth-form {
    grid-template-columns: 1fr;
  }

  .auth-extra[open] .stacked-form {
    position: static;
  }

  .search,
  .segmented {
    grid-column: 1 / -1;
  }

  .mini-summary {
    grid-column: 1 / -1;
    text-align: left;
  }

  .stickers {
    grid-template-columns: repeat(auto-fill, minmax(62px, 1fr));
  }
}