/* Tools Collection - Gemeinsames Stylesheet */
:root {
  --primary-color: #01b3a7;
  --primary-hover: #019688;
  --bg-color: #f4f4f9;
  --card-bg: #fff;
  --text-color: #333;
  --text-secondary: #6c757d;
  --success-color: #28a745;
  --info-color: #3498db;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
}

/* Dark Mode */
html.dark-mode {
  --bg-color: #1a1a2e;
  --card-bg: #16213e;
  --text-color: #e0e0e0;
  --text-secondary: #a0a0a0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Montserrat', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header Bar */
.header-bar {
  background-color: #1a1a2e;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.header-nav {
  display: flex;
  gap: 20px;
  align-items: center;
}

.header-link {
  color: #fff;
  text-decoration: none;
  padding: 8px 16px;
  font-size: 14px;
  border-radius: var(--border-radius);
  transition: background-color 0.3s ease;
}

.header-link:hover {
  background-color: var(--primary-color);
}

.header-link.active {
  background-color: var(--primary-color);
}

.header-brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

.dark-mode-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Main Container */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 20px 40px;
}

/* Page Title */
.page-title {
  text-align: center;
  margin-bottom: 30px;
  color: var(--text-color);
}

.page-title h1 {
  font-size: 2rem;
  margin: 0 0 10px;
}

.page-title p {
  color: var(--text-secondary);
  margin: 0;
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

/* Tool Card */
.tool-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 25px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.tool-card-icon {
  font-size: 40px;
  margin-bottom: 15px;
}

.tool-card-title {
  font-size: 18px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
}

.tool-card-title:hover {
  color: var(--primary-hover);
}

.tool-card-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-color);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  border: 2px solid #ddd;
  border-radius: var(--border-radius);
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: border-color 0.3s ease;
}

html.dark-mode .form-input,
html.dark-mode .form-textarea,
html.dark-mode .form-select {
  border-color: #3a3a5c;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #6c757d;
  color: #fff;
}

.btn-secondary:hover {
  background-color: #5a6268;
}

/* Result Box */
.result-box {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-top: 20px;
}

.result-box-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--text-color);
}

/* Crypto/Data Cards Grid */
.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 15px;
}

.data-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
}

.data-card-name {
  font-size: 18px;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 5px;
}

.data-card-symbol {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.data-card-value {
  font-size: 22px;
  color: var(--success-color);
  font-weight: 700;
}

.data-card-info {
  font-size: 12px;
  color: var(--info-color);
  margin-top: 5px;
}

/* Footer */
.tools-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
  .header-bar {
    flex-direction: column;
    padding: 10px;
    gap: 10px;
  }

  .header-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .main-container {
    padding-top: 140px;
  }

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

  .page-title h1 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .header-link {
    padding: 6px 12px;
    font-size: 13px;
  }

  .main-container {
    padding: 160px 15px 30px;
  }
}