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

/* Body & Background */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Homepage specific container */
body.homepage .container {
  max-width: 900px;
  padding: 40px;
}

/* External link indicator */
a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.8em;
}

/* Typography */
h1 {
  color: #333;
  margin-bottom: 10px;
  font-size: 28px;
}

body.homepage h1 {
  font-size: 32px;
}

h2 {
  color: #444;
  margin-top: 25px;
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 600;
}

h3 {
  color: #555;
  margin-top: 30px;
  margin-bottom: 15px;
  font-size: 16px;
}

p {
  color: #555;
  margin-bottom: 15px;
  line-height: 1.6;
}

em {
  color: #666;
  font-size: 13px;
}

pre {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 15px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.4;
}

/* Subtitle */
.subtitle {
  color: #666;
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.6;
}

body.homepage .subtitle {
  margin-bottom: 40px;
  font-size: 16px;
}

.subtitle a {
  color: #667eea;
  text-decoration: none;
}

.subtitle a:hover {
  text-decoration: underline;
}

/* Suffix (homepage) */
.suffix {
  color: #666;
  margin-top: 20px;
  font-size: 16px;
}

/* Navigation */
.home-link {
  display: inline-block;
  color: #667eea;
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 20px;
  transition: color 0.3s;
}

.home-link:hover {
  color: #764ba2;
  text-decoration: underline;
}

.home-link::before {
  content: "← ";
}

/* Homepage Tool Cards */
.tools-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tool-card {
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: 20px;
  transition: all 0.3s;
  text-decoration: none;
  display: block;
}

.tool-card:hover {
  border-color: #667eea;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
  transform: translateY(-2px);
}

.tool-card h2 {
  color: #667eea;
  font-size: 20px;
  margin-bottom: 8px;
  margin-top: 0;
}

.tool-card p {
  color: #555;
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

/* Footer (homepage) */
footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #e0e0e0;
  text-align: center;
  color: #666;
  font-size: 14px;
}

footer a {
  color: #667eea;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Form Elements */
label {
  display: block;
  font-weight: 600;
  color: #444;
  margin-bottom: 8px;
  font-size: 14px;
}

textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  resize: vertical;
  transition: border-color 0.3s;
  min-height: 150px;
}

textarea:focus {
  outline: none;
  border-color: #667eea;
}

textarea[readonly] {
  background: #f8f9fa;
}

/* JWT tool specific textarea styles */
#input {
  min-height: 100px;
}

#header, #payload, #signature {
  min-height: 150px;
  background: #f8f9fa;
}

#output {
  min-height: 100px;
  background: #e8f5e9;
}

/* SQL tools textarea styles */
.sql-tool textarea {
  margin-bottom: 15px;
}

/* Input Fields */
input[type="text"] {
  padding: 10px 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 14px;
  transition: border-color 0.3s;
  margin-bottom: 15px;
}

.sql-insert-tool input[type="text"] {
  width: 100%;
}

input[type="text"]:focus {
  outline: none;
  border-color: #667eea;
}

input[type="checkbox"] {
  margin-right: 8px;
  cursor: pointer;
}

.checkbox-group {
  margin-bottom: 20px;
}

.checkbox-group label {
  display: inline;
  font-weight: normal;
  cursor: pointer;
}

/* Buttons */
button {
  background: #667eea;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #764ba2;
}

button:disabled {
  background: #ccc;
  cursor: not-allowed;
}

/* Layout Helpers */
.section {
  margin-bottom: 25px;
}

.field-group {
  margin-bottom: 20px;
}

/* Grid Layout (JWT tool) */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* State Classes */
.hidden {
  display: none;
}

.error {
  color: #d32f2f;
  font-size: 13px;
  margin-top: 5px;
}

.error.visible {
  display: block;
}

.success {
  color: #2e7d32;
  font-size: 13px;
  margin-top: 5px;
  display: none;
}

.success.visible {
  display: block;
}

/* Info Box (AI CSV tool) */
.info-box {
  background: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.6;
  color: #1565c0;
}

/* Step Numbers (AI CSV tool) */
.step-number {
  display: inline-block;
  width: 24px;
  height: 24px;
  background: #667eea;
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 24px;
  font-size: 14px;
  font-weight: 600;
  margin-right: 8px;
}