:root {
  --bg-color: #121212;
  --sidebar-bg: #1e1e1e;
  --text-main: #e0e0e0;
  --text-muted: #a0a0a0;
  --accent: #bb86fc;
  --card-bg: #2d2d2d;
  --border: #333;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-color);
  color: var(--text-main);
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
#sidebar-container {
  width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 25px 20px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.5px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 15px 0;
}

.sidebar-nav a {
  padding: 12px 20px;
  text-decoration: none;
  color: var(--text-main);
  transition: background 0.2s, color 0.2s;
  font-size: 0.95rem;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(187, 134, 252, 0.1);
  color: var(--accent);
  border-right: 3px solid var(--accent);
}

/* Main Content */
.main-container {
  width: 100%;
  display: flex;
  justify-content: center;
}

main {
  flex: 1;
  padding: 50px;
  overflow-y: auto;
  max-width: 900px;
}

h1 {
  margin-bottom: 10px;
  font-size: 2.2rem;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1.1rem;
}

/* Tool UI */
.tool-container {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 40px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

input[type="text"] {
  width: 100%;
  padding: 18px 20px;
  background: var(--bg-color);
  border: 1px solid var(--border);
  color: var(--text-main);
  border-radius: 8px;
  font-size: 1.1rem;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  margin-bottom: 25px;
  transition: border-color 0.2s;
}

input[type="text"]:focus {
  border-color: var(--accent);
}

textarea,
select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-color);
  border: 1px solid var(--border);
  color: var(--text-main);
  border-radius: 8px;
  font: 0.95rem 'JetBrains Mono', monospace;
  outline: none;
}

textarea {
  display: block;
  resize: vertical;
  margin-bottom: 20px;
}

textarea:focus,
select:focus {
  border-color: var(--accent);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

.form-grid input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-color);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-main);
  font: 0.95rem 'JetBrains Mono', monospace;
  outline: none;
}

.form-grid input:focus {
  border-color: var(--accent);
}

.field-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.tool-options {
  display: grid;
  grid-template-columns: minmax(180px, 260px) 1fr;
  column-gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.tool-options .field-label {
  grid-column: 1;
}

.tool-options select {
  grid-column: 1;
}

.value-count {
  grid-column: 2;
  grid-row: 2;
  color: var(--text-muted);
  font-size: 0.9rem;
}

button {
  padding: 12px 18px;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  color: #121212;
  cursor: pointer;
  font: 600 0.9rem 'Inter', sans-serif;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.results-grid > a {
  display: flex !important;
}

.results-grid > a > .tool-container {
  flex: 1;
}

.result-card {
  background: var(--bg-color);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.result-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.result-value {
  font-size: 1.1rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: #fff;
  word-break: break-all;
}

.error {
  color: #cf6679;
  font-size: 0.95rem;
  margin-top: -15px;
  margin-bottom: 20px;
  display: none;
}

/* Ads & Content */
.ad-slot {
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border);
  padding: 30px;
  text-align: center;
  color: var(--text-muted);
  margin: 40px 0;
  border-radius: 8px;
  font-size: 0.9rem;
}

article {
  border-top: 1px solid var(--border);
  padding-top: 40px;
}

article h2 {
  margin-top: 30px;
  margin-bottom: 15px;
  font-size: 1.5rem;
  color: #fff;
}

article h3 {
  margin-top: 25px;
  margin-bottom: 10px;
  font-size: 1.2rem;
}

article p {
  line-height: 1.7;
  margin-bottom: 20px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

article code {
  background: var(--sidebar-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
}

article pre {
  background: #0d0d0d;
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

article pre code {
  background: transparent;
  padding: 0;
}

/* Responsive */
@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  #sidebar-container {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  main {
    padding: 25px;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

  .tool-options {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .tool-options .field-label,
  .tool-options select,
  .value-count {
    grid-column: 1;
  }

  .value-count {
    grid-row: auto;
    margin-top: 10px;
  }
}