:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-alt: #e9eef6;
  --text: #152033;
  --muted: #5f6e84;
  --line: #d6deea;
  --accent: #2457d6;
  --accent-dark: #173b93;
  --success: #2f8f4f;
  --danger: #b73e3e;
  --warning: #d07a21;
  --timed: #c74646;
  --closed-easy: linear-gradient(135deg, #fdfefe, #dce9ff);
  --closed-hard: linear-gradient(135deg, #d4e4ff, #8fb3f2);
  --closed-timed: linear-gradient(135deg, #ffd6d6, #f08d8d);
  --shadow: 0 18px 50px rgba(17, 31, 54, 0.08);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(36, 87, 214, 0.16), transparent 30%),
    radial-gradient(circle at bottom right, rgba(47, 143, 79, 0.12), transparent 28%),
    var(--bg);
}

button,
input,
textarea,
select {
  font: inherit;
}

.hidden {
  display: none !important;
}

.topbar,
.login-shell,
.app-layout,
.admin-layout {
  width: min(1200px, calc(100% - 24px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 14px;
}

.app-layout,
.admin-layout,
.login-shell {
  display: grid;
  gap: 18px;
  padding-bottom: 28px;
}

.app-layout {
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
}

.admin-layout {
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
}

.login-page,
.admin-page,
.app-page {
  min-height: 100vh;
}

.login-shell {
  min-height: 100vh;
  align-items: center;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 420px);
}

.panel {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(214, 222, 234, 0.9);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 18px;
  backdrop-filter: blur(12px);
}

.hero-panel {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.lead,
.muted,
.message,
.task-description,
.hint-box span {
  color: var(--muted);
}

.hint-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding: 14px;
  border-radius: 16px;
  background: var(--panel-alt);
}

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

.compact {
  gap: 10px;
}

.field {
  display: grid;
  gap: 6px;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.field textarea {
  resize: vertical;
}

.primary-button,
.secondary-button,
.success-button,
.warning-button,
.danger-button {
  border: 0;
  border-radius: 14px;
  padding: 12px 15px;
  font-weight: 700;
  cursor: pointer;
}

.primary-button {
  background: var(--accent);
  color: #fff;
}

.secondary-button {
  background: #edf2fb;
  color: var(--text);
}

.success-button {
  background: var(--success);
  color: #fff;
}

.warning-button {
  background: var(--warning);
  color: #fff;
}

.danger-button {
  background: var(--danger);
  color: #fff;
}

.button-row,
.badge-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.button-row.wrap {
  flex-wrap: wrap;
}

.admin-link {
  color: var(--accent);
  text-decoration: none;
}

.panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #ecf2ff;
  padding: 10px 13px;
  font-size: 0.95rem;
  font-weight: 700;
}

.banner {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #fff2db;
  color: #83520d;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.card-cell {
  min-height: 70px;
  border: 0;
  border-radius: 18px;
  padding: 10px;
  font-size: 0.83rem;
  text-align: left;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.card-cell strong {
  display: block;
}

.card-cell small {
  display: block;
  opacity: 0.9;
}

.card-cell.is-closed.easy {
  background: var(--closed-easy);
}

.card-cell.is-closed.hard {
  background: var(--closed-hard);
}

.card-cell.is-closed.timed {
  background: var(--closed-timed);
}

.card-cell.is-open {
  background: #f8fbff;
  border: 1px solid #c9daff;
}

.card-cell.is-completed {
  background: linear-gradient(135deg, #d7f4dd, #8fd1a0);
  color: #11351b;
}

.card-cell.is-expired {
  background: linear-gradient(135deg, #e7e7e7, #bdbdbd);
  color: #364049;
}

.card-cell.has-image::before,
.task-image::before,
.cell-preview::before {
  content: "";
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.3;
}

.card-cell > span,
.card-cell > div {
  position: relative;
  z-index: 1;
}

.leaderboard-list {
  display: grid;
  gap: 10px;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.leaderboard-rank {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #edf2fb;
  font-weight: 700;
}

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 40;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 15, 28, 0.6);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100% - 20px));
  max-height: calc(100vh - 24px);
  overflow: auto;
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
  font-size: 1.5rem;
  cursor: pointer;
}

.task-image,
.cell-preview {
  min-height: 180px;
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: #e8effa;
}

.task-content {
  padding: 18px;
}

.task-type {
  font-weight: 700;
  color: var(--accent);
}

.task-meta {
  display: grid;
  gap: 8px;
  margin: 0;
}

.task-meta div {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.task-meta dt {
  font-weight: 700;
}

.task-meta dd {
  margin: 0;
  text-align: right;
}

.task-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.admin-sidebar,
.admin-main,
.game-panel,
.leaderboard-panel {
  min-width: 0;
}

.teams-list {
  display: grid;
  gap: 10px;
}

.team-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
}

.team-row > * {
  min-width: 0;
  width: 100%;
}

.team-card-select {
  grid-column: 1;
}

.team-remove-button {
  grid-column: 2;
}

.card-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.card-tab {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
}

.card-tab.active {
  background: var(--accent);
  color: #fff;
}

.admin-grid-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 360px);
  gap: 16px;
}

.admin-grid .card-cell {
  min-height: 86px;
}

.card-cell.selected {
  outline: 3px solid var(--accent);
}

.cell-editor {
  display: grid;
  gap: 12px;
}

.admin-login-wrap {
  width: min(460px, calc(100% - 24px));
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

@media (max-width: 980px) {
  .app-layout,
  .admin-layout,
  .login-shell,
  .admin-grid-wrap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .card-cell {
    min-height: 58px;
    border-radius: 14px;
    font-size: 0.72rem;
    padding: 8px;
  }

  .task-actions,
  .button-row,
  .badge-row {
    flex-wrap: wrap;
  }

  .team-row {
    grid-template-columns: 1fr;
  }

  .team-card-select,
  .team-remove-button {
    grid-column: auto;
  }
}