:root {
  --line: rgba(80, 150, 255, 0.2);
  --panel: rgba(11, 21, 48, 0.86);
  --soft-border: rgba(122, 165, 245, 0.28);
  --text: #f5f7ff;
  --muted: #b5c4e8;
  --accent: #ff8b2c;
}

body {
  color: var(--text);
  min-height: 100vh;
  background: radial-gradient(circle at center, #0a1a35 0%, #071022 52%, #020617 100%);
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  z-index: -2;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 64px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 64px 100%;
  opacity: 0.2;
}

body::after {
  z-index: -1;
  background:
    radial-gradient(circle at 16% 18%, rgba(65, 118, 255, 0.22), transparent 34%),
    radial-gradient(circle at 86% 14%, rgba(255, 139, 44, 0.16), transparent 34%),
    radial-gradient(circle at 50% 84%, rgba(40, 155, 255, 0.14), transparent 42%);
}

.page {
  max-width: 1080px;
  margin: 26px auto 42px;
  padding: 0 16px;
}

.title {
  text-align: center;
  font-size: clamp(2rem, 3.5vw, 2.9rem);
  margin-bottom: 10px;
  color: #edf3ff;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.subtitle {
  text-align: center;
  font-size: 1.05rem;
  line-height: 1.58;
  color: var(--muted);
  margin: 0 auto 24px;
  max-width: 900px;
}

.tool-card {
  max-width: 820px;
  margin: 0 auto;
  border: 1px solid var(--soft-border);
  border-radius: 18px;
  background: var(--panel);
  padding: 24px 20px;
  box-shadow: 0 18px 36px rgba(5, 12, 32, 0.36);
}

.validator-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-label {
  text-align: center;
  font-size: 1.08rem;
  font-weight: 700;
  color: #eaf1ff;
}

.validator-form input {
  width: 100%;
  border: 1px solid rgba(122, 165, 245, 0.42);
  border-radius: 12px;
  font-size: 1rem;
  padding: 13px 15px;
  color: #f4f8ff;
  background: rgba(6, 13, 30, 0.84);
}

.validator-form input:focus {
  outline: none;
  border-color: rgba(255, 138, 61, 0.72);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.12);
}

.validate-btn {
  align-self: center;
  border: 1px solid var(--accent);
  background: rgba(255, 138, 61, 0.08);
  color: #ffd4b2;
  padding: 10px 24px;
  font-size: 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
}

.validate-btn:hover {
  background: rgba(255, 138, 61, 0.2);
}

.error-text {
  min-height: 1.2rem;
  text-align: center;
  color: #ff9c9c;
  font-size: 0.94rem;
  font-weight: 600;
}

.result-panel {
  margin-top: 20px;
  background: rgba(16, 35, 74, 0.95);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid rgba(122, 165, 245, 0.34);
}

.result-panel h2,
.result-panel h3 {
  color: #dfeaff;
  margin-bottom: 9px;
}

.result-panel h2 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(122, 165, 245, 0.3);
}

.result-panel h3 {
  margin-top: 14px;
  font-size: 1.02rem;
}

.table-grid {
  border: 1px solid rgba(122, 165, 245, 0.3);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(6, 13, 30, 0.8);
}

.table-grid div {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(122, 165, 245, 0.24);
  font-size: 0.97rem;
  color: #e5eeff;
}

.table-grid div:last-child {
  border-bottom: 0;
}

.call-link {
  color: #8fc5ff;
  text-decoration: underline;
}

.copy-btn {
  margin: 16px auto 0;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid rgba(255, 138, 61, 0.9);
  background: rgba(255, 138, 61, 0.12);
  color: #ffe4cf;
  cursor: pointer;
  display: block;
  font-size: 0;
  position: relative;
}

.copy-btn::before {
  content: "\1F4CB";
  font-size: 1rem;
}

.copy-btn.copied::after {
  content: "Copied";
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: #ffcfa9;
}

.short-codes {
  max-width: 820px;
  margin: 26px auto 0;
}

.short-codes h2 {
  font-size: clamp(1.55rem, 2.7vw, 2.15rem);
  text-align: center;
  margin-bottom: 10px;
  color: #e8f0ff;
}

.short-codes p {
  text-align: center;
  color: var(--muted);
  margin-bottom: 16px;
  font-size: 1rem;
}

.accordion {
  border: 1px solid rgba(122, 165, 245, 0.3);
  border-radius: 10px;
  background: rgba(10, 20, 44, 0.88);
  margin-bottom: 10px;
  overflow: hidden;
}

.accordion summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  background: rgba(18, 33, 66, 0.92);
  color: #e8f0ff;
}

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

.accordion[open] summary {
  background: rgba(255, 138, 61, 0.18);
  color: #ffe1cc;
}

.chevron {
  font-size: 0.9rem;
}

.accordion-body {
  padding: 10px;
}

.short-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(7, 15, 35, 0.9);
}

.short-table th,
.short-table td {
  border: 1px solid rgba(122, 165, 245, 0.2);
  padding: 8px;
  text-align: left;
  font-size: 0.94rem;
  color: #e7efff;
}

.short-table th {
  background: rgba(20, 35, 72, 0.92);
}

.hidden {
  display: none;
}

@media (max-width: 760px) {
  .page {
    margin-top: 18px;
    padding: 0 12px;
  }

  .tool-card,
  .short-codes {
    max-width: 100%;
  }

  .title {
    font-size: clamp(1.65rem, 8vw, 2.15rem);
  }

  .subtitle {
    font-size: 0.98rem;
  }

  .input-label {
    font-size: 1rem;
  }

  .validator-form input,
  .validate-btn {
    font-size: 0.98rem;
  }

  .result-panel h2 {
    font-size: 1.12rem;
  }

  .result-panel h3 {
    font-size: 0.98rem;
  }

  .table-grid div,
  .accordion summary,
  .short-table th,
  .short-table td {
    font-size: 0.9rem;
  }
}