:root {
  --bg: #050816;
  --bg-soft: #0b1024;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-strong: rgba(255, 255, 255, 0.13);
  --border: rgba(255, 255, 255, 0.16);
  --text: #ffffff;
  --muted: #aab2d5;
  --primary: #00d4ff;
  --primary-2: #7c3cff;
  --success: #36e39a;
  --danger: #ff4d6d;
  --warning: #ffcc66;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 10%, rgba(0, 212, 255, 0.25), transparent 28%),
    radial-gradient(circle at 80% 0%, rgba(124, 60, 255, 0.35), transparent 30%),
    radial-gradient(circle at 50% 90%, rgba(0, 212, 255, 0.12), transparent 35%),
    linear-gradient(135deg, #050816 0%, #090d20 45%, #050816 100%);
}

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

.navbar {
  width: min(1180px, calc(100% - 32px));
  margin: 20px auto 0;
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 24px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.25);
}

.brand strong {
  display: block;
  font-size: 18px;
}

.brand small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 10px 14px;
  color: var(--muted);
  border-radius: 14px;
  transition: 0.2s ease;
}

.nav-links a:hover {
  color: #fff;
  background: var(--glass-strong);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 34px auto;
}

.glass {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 30px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero {
  padding: 42px;
  display: grid;
  grid-template-columns: 1.5fr 0.8fr;
  gap: 28px;
  align-items: center;
  animation: fadeUp 0.6s ease both;
}

.badge {
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.12);
  border: 1px solid rgba(0, 212, 255, 0.28);
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.3px;
}

h1 {
  margin: 16px 0;
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1;
}

h1 span {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  color: transparent;
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 42px);
}

h3 {
  margin: 0 0 14px;
  font-size: 24px;
}

h4 {
  margin: 10px 0 8px;
  font-size: 18px;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-text {
  font-size: 19px;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 14px 20px;
  border-radius: 16px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 800;
  font-size: 15px;
  transition: 0.2s ease;
}

.btn.primary {
  color: #03101c;
  background: linear-gradient(135deg, var(--primary), #8ff0ff);
  box-shadow: 0 12px 30px rgba(0, 212, 255, 0.25);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(0, 212, 255, 0.34);
}

.btn.secondary {
  color: #fff;
  background: var(--glass-strong);
  border-color: var(--border);
}

.btn.secondary:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.16);
}

.btn.full {
  width: 100%;
}

.hero-card {
  padding: 26px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
}

.hero-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 2;
}

.grid {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

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

.card {
  padding: 26px;
  animation: fadeUp 0.7s ease both;
}

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 18px;
  background: var(--glass-strong);
  font-size: 24px;
}

.section {
  margin-top: 24px;
  padding: 34px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.step {
  padding: 22px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.step span {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  font-weight: 900;
}

.page-header {
  padding: 38px;
  animation: fadeUp 0.6s ease both;
}

.page-header h1 {
  font-size: clamp(34px, 5vw, 56px);
}

.rules-list {
  display: grid;
  gap: 14px;
}

.rule-item {
  padding: 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.rule-category {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.rule-item p {
  margin: 0;
  color: #fff;
}

.center {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.loading,
.empty,
.error {
  padding: 22px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
}

.error {
  color: var(--danger);
  border: 1px solid rgba(255, 77, 109, 0.4);
}

.progress {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 24px;
}

#progressBar {
  width: 0%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  transition: width 0.3s ease;
}

.quiz-box {
  display: grid;
  gap: 18px;
}

.question-card {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.question-count {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--primary);
  font-weight: 800;
  font-size: 13px;
}

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

.answer-btn {
  padding: 15px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  text-align: left;
  transition: 0.2s ease;
}

.answer-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-1px);
}

.answer-btn.correct {
  border-color: rgba(54, 227, 154, 0.7);
  background: rgba(54, 227, 154, 0.16);
}

.answer-btn.wrong {
  border-color: rgba(255, 77, 109, 0.7);
  background: rgba(255, 77, 109, 0.16);
}

.answer-btn:disabled {
  cursor: not-allowed;
  opacity: 0.8;
}

.form-box {
  max-width: 560px;
  margin: 0 auto;
}

label {
  display: block;
  margin: 18px 0 8px;
  color: #fff;
  font-weight: 700;
}

input {
  width: 100%;
  padding: 15px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  outline: none;
  font-size: 15px;
}

input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

input:focus {
  border-color: rgba(0, 212, 255, 0.75);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.08);
}

.login-card {
  max-width: 460px;
  margin: 60px auto;
  padding: 34px;
}

.error-text {
  color: var(--danger);
  margin-top: 14px;
  font-weight: 700;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  margin-bottom: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.stat-card {
  padding: 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.stat-card span {
  display: block;
  font-size: 36px;
  font-weight: 900;
  color: #fff;
}

.stat-card p {
  margin: 6px 0 0;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 15px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

th {
  color: var(--primary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  color: #fff;
}

.status {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.status.ok {
  color: var(--success);
  background: rgba(54, 227, 154, 0.12);
  border: 1px solid rgba(54, 227, 154, 0.35);
}

.status.fail {
  color: var(--danger);
  background: rgba(255, 77, 109, 0.12);
  border: 1px solid rgba(255, 77, 109, 0.35);
}

footer {
  width: min(1180px, calc(100% - 32px));
  margin: 30px auto;
  text-align: center;
}

footer p {
  font-size: 14px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 850px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
  }

  .nav-links a {
    flex: 1;
    text-align: center;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 28px;
  }

  .grid.three,
  .steps,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .page-header,
  .login-card {
    padding: 24px;
  }

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

textarea,
select {
  width: 100%;
  padding: 15px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  outline: none;
  font-size: 15px;
  font-family: inherit;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

select option {
  color: #000;
}

textarea::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

textarea:focus,
select:focus {
  border-color: rgba(0, 212, 255, 0.75);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.08);
}

.admin-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.tab-btn {
  padding: 13px 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-weight: 800;
}

.tab-btn.active,
.tab-btn:hover {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
}

.admin-form {
  padding: 24px;
  margin-bottom: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.checkbox-row {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  margin: 18px 0;
}

.checkbox-row label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--muted);
}

.checkbox-row input {
  width: auto;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.admin-list {
  display: grid;
  gap: 16px;
}

.admin-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 22px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
}

.admin-item h3 {
  margin: 8px 0 10px;
  font-size: 20px;
}

.admin-item p {
  margin: 6px 0;
}

.item-actions {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
}

.btn.danger {
  color: #fff;
  background: rgba(255, 77, 109, 0.18);
  border-color: rgba(255, 77, 109, 0.45);
}

.btn.danger:hover {
  transform: translateY(-2px);
  background: rgba(255, 77, 109, 0.28);
}

.mini-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.result-box {
  padding: 24px;
  margin-bottom: 24px;
  border-radius: 24px;
  border: 1px solid var(--border);
}

.success-box {
  background: rgba(54, 227, 154, 0.12);
  border-color: rgba(54, 227, 154, 0.35);
}

.error-box {
  background: rgba(255, 77, 109, 0.12);
  border-color: rgba(255, 77, 109, 0.35);
}

@media (max-width: 850px) {
  .admin-item {
    grid-template-columns: 1fr;
  }

  .item-actions {
    width: 100%;
  }

  .item-actions .btn {
    width: 100%;
  }

  .tab-btn {
    flex: 1;
  }
}