:root {
  --bg: #0f1316;
  --card: #171d22;
  --accent: #ffb224;
  --accent-dark: #ff8f1f;
  --text: #f5f6f7;
  --muted: #a7b0b7;
  --stroke: #2b333a;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Inter", "Arial", sans-serif;
  background: #0f1316;
  color: var(--text);
}

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

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 6vw;
  border-bottom: 1px solid var(--stroke);
  background: #11171c;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.logo img {
  width: 28px;
  height: 28px;
}

.header nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
}

.header nav .active {
  color: var(--text);
}

.container {
  padding: 30px 6vw 80px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--stroke);
  margin-bottom: 24px;
}

.auth-card {
  max-width: 560px;
  margin: 0 auto 32px;
}

.auth-error {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(255, 87, 87, 0.12);
  border: 1px solid rgba(255, 87, 87, 0.4);
  color: #ffb7b7;
  font-size: 14px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}

.tab {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  color: #1a1208;
  border-color: var(--accent);
}

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

.pane input,
.pane textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: #10161b;
  color: var(--text);
}

.code-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.btn {
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #1a1208;
}

.btn.secondary {
  background: #232a30;
  border: 1px solid var(--stroke);
  color: var(--text);
}

.btn.ghost {
  background: transparent;
  border: 1px solid var(--stroke);
  color: var(--text);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 12px;
}

.balance {
  font-size: 20px;
  font-weight: 700;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.plan-card {
  border: 1px solid var(--stroke);
  border-radius: 14px;
  padding: 18px;
  background: #141a20;
  display: grid;
  gap: 10px;
}

.plan-card h4 {
  margin: 0;
}

.topup-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.subscription-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 12px;
}

.subscription-box input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: #10161b;
  color: var(--text);
}

.subscription-actions {
  margin-top: 12px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hidden {
  display: none;
}

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

@media (max-width: 640px) {
  .code-row {
    grid-template-columns: 1fr;
  }
  .subscription-box {
    grid-template-columns: 1fr;
  }
  .header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  .header nav {
    flex-wrap: wrap;
  }
}