:root {
  --bg-dark: #020617;
  --bg-card: #0b1120;
  --border: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #22d3ee; /* Cyan */
  --font-sans: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  display: flex;
  justify-content: center;
  padding: 4rem 1.5rem;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 850px;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  margin-bottom: 0.5rem;
  background: linear-gradient(to bottom, #fff 40%, #64748b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.label-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  align-items: center;
}
label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}
#charCount {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

textarea,
.output-area {
  width: 100%;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

textarea {
  height: 300px;
  resize: none;
  margin-bottom: 1.5rem;
}
textarea:focus {
  border-color: var(--accent);
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.btn-tool {
  background: #1e293b;
  border: 1px solid transparent;
  color: #fff;
  padding: 0.85rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-tool:hover {
  background: #334155;
  border-color: var(--accent);
  transform: translateY(-1px);
}

#outputContainer {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.btn-copy {
  background: var(--accent);
  color: #020617;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

.output-area {
  min-height: 120px;
  white-space: pre-wrap;
  background: #070b14;
}

footer {
  margin-top: 4rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.status-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding: 0.6rem 1.5rem;
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: 100px;
}
.dot {
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}
.affiliate-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.hidden {
  display: none;
}

@media (max-width: 600px) {
  body {
    padding: 2rem 1rem;
  }
  h1 {
    font-size: 2.5rem;
  }
  .button-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 404 page */
.error-card {
  text-align: center;
  padding: 4rem 2rem;
}
.error-code {
  font-size: clamp(5rem, 20vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  background: linear-gradient(to bottom, #fff 40%, #64748b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.error-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.error-msg {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.home-link {
  display: inline-block;
  background: var(--accent);
  color: #020617;
  padding: 0.85rem 1.75rem;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.9rem;
  transition: transform 0.2s;
}
.home-link:hover {
  transform: translateY(-1px);
}

/* Content pages (About, Privacy) */
.back-link {
  display: inline-block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}
.back-link:hover {
  color: var(--accent);
}
.content-h1 {
  font-size: clamp(2rem, 6vw, 3rem);
}
.content-card {
  padding: 2.5rem;
}
.content-card .lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.content-card h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
}
.content-card h2:first-of-type {
  margin-top: 0;
}
.content-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}
.content-card ul {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  font-size: 0.95rem;
}
.content-card li {
  margin-bottom: 0.5rem;
}
.content-card strong {
  color: var(--text-primary);
  font-weight: 600;
}
.content-card code {
  background: #020617;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--accent);
  border: 1px solid var(--border);
}
.inline-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.inline-link:hover {
  border-bottom-color: var(--accent);
}

/* Footer links */
.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
}
.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-links .separator {
  color: var(--border);
}