/* Base Variables - Using solid colors */
:root {
  /* Updated color scheme with solid colors */
  --primary-color: rgba(33, 37, 41, 0.95);
  --primary-hover: rgba(0, 0, 0, 0.9);
  --bg-color: #F8F9FA;
  --card-bg: #FFFFFF;
  --text-color: #212529;
  --border-color: #DEE2E6;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --result-bg: #F5F5F5;
  --success-color: #3AB54A; /* Green from the provided design */
  --danger-color: #DC3545;
  --transition-speed: 0.3s;
  
  /* Button styling */
  --button-text: #FFFFFF;
  --button-bg: #212529;
  --button-hover: #343A40;
  
  /* Card styling */
  --card-radius: 12px;
}

/* Dark Theme Variables */
.dark {
  --primary-color: rgba(255, 255, 255, 0.9);
  --primary-hover: rgba(255, 255, 255, 0.95);
  --bg-color: #121212;
  --card-bg: #1E1E1E;
  --text-color: #F8F9FA;
  --border-color: #343A40;
  --shadow-color: rgba(0, 0, 0, 0.25);
  --result-bg: #212529;
  
  /* Button styling */
  --button-bg: #F8F9FA;
  --button-text: #212529;
  --button-hover: #DEE2E6;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Theme Toggle Button - Redesigned as rectangular */
.theme-toggle-floating {
  position: fixed;
  top: 15px;
  right: 15px;
  width: 40px;
  height: 36px;
  border-radius: 4px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  padding: 0;
  box-shadow: 0 2px 5px var(--shadow-color);
  transition: background-color var(--transition-speed), transform 0.2s;
}

.theme-toggle-floating:hover {
  background-color: var(--border-color);
}

.theme-toggle-floating:active {
  transform: scale(0.95);
}

/* Theme Icons */
.theme-icon {
  position: absolute;
  opacity: 0;
  transition: opacity var(--transition-speed);
}

.theme-icon.visible {
  opacity: 1;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  width: 100%;
  background-color: var(--bg-color);
}

/* Main Content */
main {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  padding: 1rem 0;
}

/* Tool Cards - Updated to match the provided design with solid backgrounds */
.tool-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background-color: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 1px 3px var(--shadow-color);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  cursor: pointer;
  text-align: center;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

.card-icon {
  color: var(--success-color);
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
}

.tool-card h3 {
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
  font-weight: 600;
}

.tool-card p {
  font-size: 0.95rem;
  color: var(--text-color);
  opacity: 0.8;
  line-height: 1.5;
}

/* Navigation */
nav {
  padding: 0.5rem 2rem;
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
}

nav button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--primary-color);
  cursor: pointer;
  padding: 0.5rem 1rem;
  font-weight: 500;
  border-radius: 4px;
  transition: background-color var(--transition-speed);
}

nav button:hover {
  background-color: var(--border-color);
}

/* Tool Detail Sections */
.tool-detail {
  background-color: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 1px 3px var(--shadow-color);
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.tool-description {
  margin-bottom: 1.5rem;
  font-size: 1rem;
  color: var(--text-color);
  opacity: 0.8;
}

/* Form Styles */
.calculator-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

label {
  font-weight: 500;
  margin-bottom: 0.25rem;
}

input, select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 1rem;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--success-color);
}

.input-help {
  font-size: 0.8rem;
  opacity: 0.7;
  margin-top: 0.25rem;
}

/* Action button styling */
button {
  padding: 0.75rem 1rem;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-speed), opacity var(--transition-speed);
}

button:hover {
  background-color: var(--button-hover);
}

/* Solution button from design example */
.solution-button {
  padding: 0.75rem 2rem;
  background-color: var(--card-bg);
  color: var(--text-color);
  border: none;
  border-radius: var(--card-radius);
  font-size: 1.25rem;
  font-weight: 600;
  box-shadow: 0 1px 3px var(--shadow-color);
  text-align: center;
  display: inline-block;
  margin: 1rem 0;
  cursor: pointer;
}

.solution-button:hover {
  background-color: var(--border-color);
}

.result-container {
  margin-top: 1rem;
  padding: 1rem;
  background-color: var(--result-bg);
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.result {
  font-weight: 500;
  flex-grow: 1;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: 4px;
}

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

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  margin: 0;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
}

.modal-body {
  padding: 1rem;
}

.modal-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  text-align: right;
}

.setting-item {
  margin-bottom: 1rem;
}

.help-section {
  margin-bottom: 2rem;
}

.help-section h4 {
  margin-bottom: 0.5rem;
}

.help-section p, .help-section ol, .help-section dl {
  margin-bottom: 1rem;
}

.help-section ol {
  padding-left: 1.5rem;
}

dl dt {
  font-weight: bold;
  margin-top: 0.5rem;
}

dl dd {
  margin-left: 1rem;
  margin-bottom: 0.5rem;
}

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

/* Profit/Loss styles */
.profit {
  color: var(--success-color);
  font-weight: bold;
}

.loss {
  color: var(--danger-color);
  font-weight: bold;
}

.error {
  color: var(--danger-color);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--button-bg);
  color: var(--button-text);
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  z-index: 2000;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Add styling for Exchange Rate calculator */
.exchange-info {
  margin-top: 1rem;
  padding: 0.5rem;
  background-color: var(--card-bg);
  border-radius: 4px;
  font-size: 0.85rem;
  opacity: 0.8;
}

.exchange-info p {
  margin: 0.3rem 0;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }
  
  .dashboard-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
  }
  
  .tool-detail {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .result-container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .copy-btn {
    align-self: flex-end;
  }
}