:root {
  --navy: #0F172A;
  --navy-light: #1E293B;
  --cyan: #22D3EE;
  --cyan-dim: #0E7490;
  --white: #F8FAFC;
  --gray: #94A3B8;
  --gray-dark: #334155;
  --green: #22C55E;
  --yellow: #EAB308;
  --red: #EF4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--navy);
  color: var(--white);
  min-height: 100vh;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  border-bottom: 1px solid var(--gray-dark);
  padding: 16px 0;
}
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
}
.logo span { color: var(--cyan); }
header nav a {
  color: var(--gray);
  margin-left: 20px;
  font-size: 0.9rem;
}
header nav a:hover { color: var(--cyan); }

/* Hero */
.hero {
  text-align: center;
  padding: 50px 0 30px;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}
.hero h1 span { color: var(--cyan); }
.hero p { color: var(--gray); font-size: 1.05rem; }

/* Tool cards */
.tools-grid {
  display: grid;
  gap: 24px;
  padding-bottom: 60px;
}

.tool-card {
  background: var(--navy-light);
  border: 1px solid var(--gray-dark);
  border-radius: 12px;
  padding: 28px;
}
.tool-card h2 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}
.tool-card .desc {
  color: var(--gray);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

/* Forms */
.input-row {
  display: flex;
  gap: 10px;
}
.input-row input[type="text"] {
  flex: 1;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--gray-dark);
  background: var(--navy);
  color: var(--white);
  font-size: 0.95rem;
}
.input-row input::placeholder { color: var(--gray); }
.input-row select {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--gray-dark);
  background: var(--navy);
  color: var(--white);
  font-size: 0.9rem;
}
.btn {
  padding: 10px 22px;
  border: none;
  border-radius: 8px;
  background: var(--cyan);
  color: var(--navy);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--cyan-dim); color: var(--white); }

/* Results */
.result-area { margin-top: 18px; }

.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  margin-right: 14px;
}
.grade-badge.pass { background: var(--green); color: var(--navy); }
.grade-badge.ok   { background: #86EFAC; color: var(--navy); }
.grade-badge.warn { background: var(--yellow); color: var(--navy); }
.grade-badge.fail { background: var(--red); color: var(--white); }

.result-header {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
}
.result-header .info h3 { font-size: 1.05rem; }
.result-header .info p { color: var(--gray); font-size: 0.85rem; }

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.result-table th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--gray-dark);
  color: var(--gray);
  font-weight: 500;
}
.result-table td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  word-break: break-all;
}
.result-table tr:last-child td { border-bottom: none; }

.status-icon { font-size: 1.1rem; }
.status-pass { color: var(--green); }
.status-fail { color: var(--red); }

.dns-record {
  background: var(--navy);
  padding: 8px 12px;
  border-radius: 6px;
  margin-bottom: 6px;
  font-family: monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--red);
}

/* Footer */
footer {
  border-top: 1px solid var(--gray-dark);
  padding: 24px 0;
  text-align: center;
  color: var(--gray);
  font-size: 0.85rem;
}

/* Loading indicator */
.htmx-indicator {
  display: none;
  color: var(--cyan);
  font-size: 0.9rem;
  padding: 10px 0;
}
.htmx-request .htmx-indicator { display: block; }
.htmx-request .btn { opacity: 0.6; pointer-events: none; }

@media (max-width: 600px) {
  .input-row { flex-direction: column; }
  .hero h1 { font-size: 1.5rem; }
  .tool-card { padding: 20px; }
}