/* ---
Modern & Responsive CSS for Password Generator
--- */

/* CSS Variables for easy theme management */
:root {
  --primary-bg-color: #1a1a2e;
  --secondary-bg-color: #16213e;
  --container-bg-color: #0f3460;
  --text-color: #e94560;
  --light-text-color: #f6f6f6;
  --input-bg-color: #1f4068;
  --input-border-color: #e94560;
  --button-bg-color: #e94560;
  --button-text-color: #ffffff;
  --button-hover-bg-color: #d43d51;
  --copy-button-bg: #16c79a;
  --copy-button-hover: #13a881;
  --box-shadow-color: rgba(233, 69, 96, 0.2);
  --font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

/* Basic Reset & Body Styling */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  /* Disable double-tap to zoom, keep pinch-to-zoom */
  touch-action: manipulation;
}

html, body {
  height: 100%;
  overflow-x: hidden; /* Prevent horizontal shake */
  background-color: var(--primary-bg-color);
}

body {
  font-family: var(--font-family);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100%;
  color: var(--light-text-color);
  transition: background-color 0.3s, color 0.3s;
  padding: 1rem 3rem; /* Increased horizontal padding */
  line-height: 1.4;
  overscroll-behavior: none; /* Prevent scroll bounce/shake on mobile */
}

/* Main Container */
.container {
  background-color: var(--secondary-bg-color);
  padding: 2rem 3.5rem; /* Increased horizontal padding */
  border-radius: 15px;
  box-shadow: 0 10px 30px var(--box-shadow-color);
  width: 100%;
  max-width: 550px; /* Slightly wider to accommodate more padding */
  text-align: center;
  border: 1px solid var(--container-bg-color);
  /* Ensure it doesn't cause overflow unless content is truly too large */
  margin: auto;
}

header {
  margin-bottom: 1.5rem;
}

h1 {
  color: var(--text-color);
  font-size: 2em;
  margin-bottom: 0.2rem;
}

.subtitle {
  font-size: 0.9em;
  color: #888;
  margin-bottom: 1rem;
}

/* Input & Control Groups */
.input-group {
  margin-bottom: 1.2rem;
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 1em;
}

/* Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 10px;
  background: var(--input-bg-color);
  border-radius: 5px;
  outline: none;
  padding: 0;
  margin: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--input-border-color);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--primary-bg-color);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--input-border-color);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--primary-bg-color);
}



/* Text and Number Inputs */
.input-group input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  background-color: var(--input-bg-color);
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.95em;
  color: var(--light-text-color);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input[type="text"]:focus {
  outline: none;
  border-color: var(--input-border-color);
}

/* Checkbox Group */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.8rem;
  margin-top: 8px;
}

.checkbox-container {
  display: flex;
  align-items: center;
}

.checkbox-group input[type="checkbox"] {
  display: none;
}

.checkbox-group label {
  position: relative;
  padding-left: 30px;
  cursor: pointer;
  font-size: 0.9em;
  font-weight: 500;
  display: flex;
  align-items: center;
  height: 25px;
}

.checkbox-group label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  background-color: var(--input-bg-color);
  border: 1px solid var(--input-border-color);
  border-radius: 4px;
}

.checkbox-group label::after {
  content: '\2713';
  position: absolute;
  left: 3px;
  top: 50%;
  transform: translateY(-50%) scale(0);
  color: var(--button-text-color);
  font-size: 0.9em;
  font-weight: 900;
  transition: transform 0.2s ease-in-out;
}

.checkbox-group input[type="checkbox"]:checked + label::before {
  background-color: var(--input-border-color);
}

.checkbox-group input[type="checkbox"]:checked + label::after {
  transform: translateY(-50%) scale(1);
}


/* Buttons */
#generate-button {
  width: 100%;
  padding: 12px;
  font-size: 1.1em;
  font-weight: bold;
  color: var(--button-text-color);
  background-color: var(--button-bg-color);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  margin-top: 0.5rem;
}

#generate-button:active {
  transform: scale(0.98);
}

/* Output Group */
.output-group {
  display: flex;
  margin-top: 1.5rem;
}

#generated-password {
  flex-grow: 1;
  padding: 10px 12px;
  font-size: 1em;
  background-color: var(--primary-bg-color);
  color: var(--light-text-color);
  border: 1px solid var(--input-bg-color);
  border-radius: 6px 0 0 6px;
  font-family: 'Courier New', Courier, monospace;
}

#copy-button {
  padding: 0 15px;
  font-size: 0.95em;
  font-weight: bold;
  color: var(--button-text-color);
  background-color: var(--copy-button-bg);
  border: none;
  border-radius: 0 6px 6px 0;
  cursor: pointer;
  transition: background-color 0.3s;
}

/* Privacy Notice Section */
.privacy-notice {
  margin-top: 1.5rem;
  padding: 1.2rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  font-size: 0.85em;
  color: #ccc;
  text-align: left; /* Align left as requested */
  line-height: 1.6;
}

/* Footer */
footer {
  margin-top: 2rem;
  font-size: 0.8em;
  color: #777;
}

footer a {
  color: #777;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
  color: var(--text-color);
}

/* ---
Responsive Design
--- */
@media (max-width: 480px) {
  body {
    padding: 1rem 2rem; /* Increased side padding */
    align-items: flex-start;
  }
  
  .container {
    padding: 1.5rem 2rem; /* Increased side padding */
    border-radius: 12px;
    box-shadow: 0 10px 20px var(--box-shadow-color);
    min-height: auto;
  }

  h1 {
    font-size: 1.6em;
  }

  .checkbox-group {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

@media (max-width: 360px) {
  .checkbox-group {
    grid-template-columns: 1fr;
  }
}