:root {
  --bg: #07111a;
  --bg-strong: #03070b;
  --panel: rgba(9, 20, 31, 0.8);
  --panel-strong: rgba(12, 24, 38, 0.92);
  --line: rgba(136, 167, 190, 0.18);
  --line-strong: rgba(125, 249, 198, 0.28);
  --text: #edf4f8;
  --muted: #96aebb;
  --accent: #7df9c6;
  --accent-strong: #23d29d;
  --warning: #f7c46b;
  --danger: #ff7b72;
  --info: #68c7ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(36, 122, 149, 0.32), transparent 34%),
    radial-gradient(circle at 82% 16%, rgba(239, 100, 72, 0.18), transparent 22%),
    linear-gradient(135deg, #081018 0%, #05080e 48%, #0b1823 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 95%);
  pointer-events: none;
}

.noise {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(transparent 0%, rgba(125, 249, 198, 0.022) 48%, transparent 100%),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.013) 0,
      rgba(255, 255, 255, 0.013) 1px,
      transparent 1px,
      transparent 4px
    );
  opacity: 0.58;
  mix-blend-mode: screen;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

h1,
h2,
h3,
p,
pre,
ul,
table {
  margin: 0;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1380px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

.hero-card,
.panel {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.hero-card {
  overflow: hidden;
  border-radius: 28px;
  padding: 30px;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -45% 42%;
  height: 240px;
  background: radial-gradient(circle, rgba(125, 249, 198, 0.18), transparent 70%);
  pointer-events: none;
}

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
}

.hero-main {
  max-width: 760px;
}

.hero-actions {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 12px;
}

.eyebrow,
.status-pill,
.helper-text,
.json-note {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow,
.helper-text,
.json-note {
  color: var(--muted);
  font-size: 0.76rem;
}

h1 {
  margin-top: 10px;
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  line-height: 0.95;
}

h2 {
  font-size: 1.06rem;
  font-weight: 700;
}

h3 {
  font-size: 0.98rem;
  font-weight: 700;
}

.summary {
  margin-top: 16px;
  color: #d3dfe7;
  max-width: 62ch;
  line-height: 1.7;
}

.stats-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.stat-card {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.028);
  padding: 16px 18px;
}

.stat-label {
  color: var(--muted);
  font-size: 0.8rem;
}

.stat-value {
  margin-top: 8px;
  font-size: 1.6rem;
  font-weight: 700;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.detail-stack {
  display: grid;
  gap: 20px;
}

.panel {
  border-radius: 24px;
  padding: 24px;
}

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

.sidebar-panel,
.submit-panel,
.history-panel,
.admin-compact {
  background: var(--panel-strong);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--accent);
  background: rgba(125, 249, 198, 0.08);
  font-size: 0.72rem;
  font-weight: 700;
}

.challenge-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.challenge-card {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  padding: 16px;
  text-align: left;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.challenge-card:hover,
.primary-btn:hover,
.secondary-btn:hover,
.danger-btn:hover,
.nav-btn:hover {
  transform: translateY(-1px);
}

.challenge-card.active {
  border-color: var(--line-strong);
  background: rgba(125, 249, 198, 0.08);
}

.challenge-card h3 {
  line-height: 1.25;
}

.challenge-card p {
  margin-top: 8px;
  color: #d4dee5;
  font-size: 0.94rem;
}

.challenge-meta,
.inline-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 7px 11px;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.03);
}

.chip.score {
  color: var(--accent);
}

.chip.instant {
  color: var(--accent);
}

.chip.review {
  color: var(--warning);
}

.chip.easy {
  color: #8fdfa2;
}

.chip.medium {
  color: #8ad8ff;
}

.chip.hard {
  color: var(--warning);
}

.chip.extreme {
  color: var(--danger);
}

.detail-title {
  margin-top: 18px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 0.95;
}

.detail-summary {
  margin-top: 16px;
  color: #d3dee7;
  line-height: 1.72;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.info-card {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
}

.info-label {
  color: var(--muted);
  font-size: 0.78rem;
}

.info-value {
  margin-top: 8px;
  font-weight: 600;
  line-height: 1.5;
}

.section-block + .section-block {
  margin-top: 22px;
}

.section-title {
  margin-bottom: 12px;
  color: #d8e3ea;
  font-size: 0.95rem;
  font-weight: 700;
}

.request-block,
.json-area {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(125, 249, 198, 0.16);
  background: linear-gradient(180deg, rgba(8, 18, 28, 0.92), rgba(5, 9, 14, 0.98));
  color: #dbf7ec;
  padding: 18px;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.notes-list {
  padding-left: 18px;
  color: #d4dee6;
  line-height: 1.7;
}

.notes-list li + li {
  margin-top: 8px;
}

.stack-form,
.editor-form,
.contest-form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.field label {
  font-size: 0.94rem;
  font-weight: 600;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid rgba(136, 167, 190, 0.24);
  border-radius: 16px;
  background: rgba(2, 8, 13, 0.84);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: rgba(125, 249, 198, 0.52);
  box-shadow: 0 0 0 4px rgba(125, 249, 198, 0.08);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-btn,
.secondary-btn,
.danger-btn,
.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.primary-btn,
.nav-btn {
  background: linear-gradient(135deg, var(--accent-strong), #0d8a83);
  color: #03211b;
  font-weight: 800;
  padding: 14px 18px;
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--line);
  color: var(--text);
  padding: 12px 16px;
}

.danger-btn {
  background: rgba(255, 123, 114, 0.08);
  border-color: rgba(255, 123, 114, 0.24);
  color: #ffd0cc;
  padding: 12px 16px;
}

.result-box {
  margin-top: 18px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.result-box.success {
  border-color: rgba(125, 249, 198, 0.38);
  background: rgba(125, 249, 198, 0.08);
}

.result-box.error {
  border-color: rgba(255, 123, 114, 0.28);
  background: rgba(255, 123, 114, 0.08);
}

.result-box.warning {
  border-color: rgba(247, 196, 107, 0.28);
  background: rgba(247, 196, 107, 0.08);
}

.result-box.info {
  border-color: rgba(104, 199, 255, 0.24);
  background: rgba(104, 199, 255, 0.08);
}

.result-title {
  font-size: 1rem;
  font-weight: 700;
}

.result-text {
  margin-top: 8px;
  color: #d0dce5;
  line-height: 1.65;
}

.history-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.history-card {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
}

.history-card p + p {
  margin-top: 8px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.74rem;
  font-weight: 700;
}

.status-correct,
.status-approved {
  color: var(--accent);
  background: rgba(125, 249, 198, 0.08);
}

.status-wrong,
.status-rejected {
  color: #ffd0cc;
  background: rgba(255, 123, 114, 0.1);
}

.status-pending {
  color: var(--warning);
  background: rgba(247, 196, 107, 0.1);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 18px;
}

.submission-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 900px;
}

.submission-table th,
.submission-table td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.submission-table th {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.mono {
  font-family: "JetBrains Mono", Consolas, monospace;
  word-break: break-all;
}

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tiny-btn {
  border-radius: 12px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  cursor: pointer;
}

.tiny-btn.approve {
  border-color: rgba(125, 249, 198, 0.28);
  color: var(--accent);
}

.tiny-btn.reject {
  border-color: rgba(255, 123, 114, 0.24);
  color: #ffd0cc;
}

.empty-state {
  margin-top: 18px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  padding: 22px;
  color: #cbd7e0;
  line-height: 1.7;
  background: rgba(255, 255, 255, 0.02);
}

.admin-layout {
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
}

.admin-stack {
  display: grid;
  gap: 20px;
}

.json-area {
  min-height: 300px;
  resize: vertical;
}

.json-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.split-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
}

@media (max-width: 1080px) {
  .layout-grid,
  .admin-layout,
  .split-row,
  .hero-split {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .stats-grid,
  .info-grid,
  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding: 20px 0 28px;
  }

  .hero-card,
  .panel {
    border-radius: 22px;
    padding: 18px;
  }

  .panel-header {
    flex-direction: column;
    align-items: flex-start;
  }

  h1 {
    font-size: 2.35rem;
  }

  .stats-grid,
  .info-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .request-block,
  .json-area {
    padding: 16px;
    font-size: 0.82rem;
  }

  .action-row,
  .json-tools {
    width: 100%;
  }

  .primary-btn,
  .secondary-btn,
  .danger-btn,
  .nav-btn {
    width: 100%;
  }
}

.hidden {
  display: none !important;
}

.auth-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.auth-panel {
  min-height: 100%;
}

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.user-name {
  font-weight: 700;
}

.announcement-list,
.stack-list,
.leaderboard-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.announcement-card,
.leaderboard-card {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
}

.announcement-meta,
.table-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.announcement-body {
  margin-top: 12px;
  color: #d4dee6;
  line-height: 1.7;
  white-space: pre-wrap;
}

.leaderboard-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
}

.leaderboard-card.active {
  border-color: rgba(125, 249, 198, 0.4);
  background: rgba(125, 249, 198, 0.08);
}

.leaderboard-rank {
  min-width: 54px;
  height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  border: 1px solid var(--line);
  font-weight: 700;
  color: var(--accent);
  background: rgba(125, 249, 198, 0.06);
}

.leaderboard-main p {
  margin-top: 8px;
  color: #d0dce5;
  line-height: 1.6;
}

.leaderboard-score {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.table-input,
.table-select {
  width: 100%;
  border: 1px solid rgba(136, 167, 190, 0.24);
  border-radius: 12px;
  background: rgba(2, 8, 13, 0.84);
  color: var(--text);
  padding: 9px 10px;
  outline: none;
}

.table-input:focus,
.table-select:focus {
  border-color: rgba(125, 249, 198, 0.52);
  box-shadow: 0 0 0 4px rgba(125, 249, 198, 0.08);
}

.gate-panel {
  margin-top: 20px;
}

.gate-actions {
  margin-top: 20px;
}

@media (max-width: 1080px) {
  .auth-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .leaderboard-card {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .leaderboard-rank {
    min-width: 0;
    width: 100%;
    justify-content: flex-start;
    padding-left: 16px;
  }
}