:root {
  --bg: #ffffff;
  --fg: #222;
  --border: #ccc;
  --primary: #007bff;
  --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg: #1e1e1e;
  --fg: #eee;
  --border: #444;
  --primary: #0d6efd;
  --shadow: rgba(0, 0, 0, 0.3);
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  position: relative; /* Needed for absolute positioning of header elements */
}

/* --- Theme Toggle Styling --- */
header {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 100;
}

.theme-toggle-container {
  position: relative;
}

.theme-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 5px var(--shadow);
  transition: all 0.3s ease;
  font-size: 1.2rem; /* Adjust icon size */
  padding: 0; /* Reset default button padding */
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 8px var(--shadow);
}

.theme-icon {
  transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(15deg);
}
/* --- End Theme Toggle Styling --- */


main {
  max-width: 32rem;
  margin: 1rem auto; /* Reduced top margin */
  padding: 1.5rem;
  position: relative; /* Establish stacking context */
  z-index: 1; /* Ensure content is below header */
}

h1 {
  margin-top: 0;
  font-size: 1.8rem;
}

.tagline {
  color: #666;
  font-style: italic;
  margin-top: -0.5rem;
}

/* --- Password Input and Toggle Styling --- */
.input-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* Container for password input and toggle button */
.password-container {
  position: relative;
  display: flex;
  margin-bottom: 1rem;
}

input[type="password"],
input[type="text"] { /* Style both password and text types */
  width: 100%;
  padding: 0.75rem;
  font-size: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  box-sizing: border-box;
  background: var(--bg);
  color: var(--fg);
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

/* Style the password visibility toggle button */
.toggle-password {
  position: absolute;
  right: 10px; /* Position inside the input */
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem; /* Adjust icon size */
  padding: 0.25rem;
  border-radius: 4px;
  transition: background-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toggle-password:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .toggle-password:hover {
  background-color: rgba(255, 255, 255, 0.1);
}
/* --- End Password Input Styling --- */


#result {
  margin-top: 1.5rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 4px;
}

[data-theme="dark"] #result {
  background: rgba(255, 255, 255, 0.05);
}


meter {
  width: 100%;
  height: 0.75rem;
}

#label {
  display: block;
  margin: 0.5rem 0;
  font-weight: 600;
  font-size: 1.1rem;
}

#crack {
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

#suggestions {
  padding-left: 1.2rem;
  margin-top: 0.5rem;
}

#suggestions li {
  margin-bottom: 0.25rem;
}

/* --- Strength Meter Colors (from original) --- */
/* These classes are applied dynamically by JS */
.score-0 { color: #dc3545 !important; } /* red - Very weak */
.score-1 { color: #ff6b6b !important; } /* light red - Weak */
.score-2 { color: #ffc107 !important; } /* yellow - Moderate/Fair */
.score-3 { color: #28a745 !important; } /* green - Strong */
.score-4 { color: #20c997 !important; } /* teal - Very strong */

.strength-meter {
  height: 8px;
  background-color: #e9ecef;
  border-radius: 4px;
  margin: 0.5rem 0;
  overflow: hidden;
}

[data-theme="dark"] .strength-meter {
  background-color: #3d3d3d;
}

.strength-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease, background-color 0.3s ease;
}

/* Strength colors for the fill bar */
.score-0 .strength-fill { background-color: #dc3545; } /* Weak */
.score-1 .strength-fill { background-color: #fd7e14; } /* Fair */
.score-2 .strength-fill { background-color: #ffc107; } /* Good */
.score-3 .strength-fill { background-color: #20c997; } /* Strong */
.score-4 .strength-fill { background-color: #28a745; } /* Very Strong */
/* --- End Strength Meter Colors --- */


.warning {
  color: #dc3545;
  font-weight: 500;
  margin-top: 0.5rem;
}

[data-theme="dark"] .warning {
  color: #ff6b6b;
}