/* --- Variables y Reset Básico --- */
:root {
    --bg-color: #f4f7f6;
    --body-text: #333;
    --card-bg: #fff;
    --border-color: #ddd;
    --muted-text: #666;
    --primary-color: #007bff;
    
    --bad: #dc3545;
    --warn: #ffc107;
    --good: #28a745;
    --teal: #17a2b8;
    --orange: #fd7e14;
    
    --spacing: 1.5rem;
    --radius: 8px;
}

*, *::before, *::after {
    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(--body-text);
    line-height: 1.6;
    padding: var(--spacing);
    max-width: 700px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.small.muted {
    font-size: 0.95rem;
    color: var(--muted-text);
    margin-bottom: var(--spacing);
}

label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1.2rem;
    color: var(--body-text);
    background-color: var(--card-bg);
    margin-bottom: var(--spacing);
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="password"]:focus,
input[type="text"]:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: var(--spacing);
}

.controls button,
.controls select {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s, opacity 0.2s;
    font-weight: 600;
}

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

#generateBtn:hover {
    background-color: #0056b3;
}

.secondary {
    background-color: var(--border-color);
    color: var(--body-text);
}

.secondary:hover {
    background-color: #ccc;
}

.controls select {
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--muted-text);
}

.result {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--spacing);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px dashed var(--border-color);
    font-size: 1.05rem;
    align-items: center;
}

.row:last-child { border-bottom: none; }
.row strong { font-weight: 600; color: var(--body-text); }
.row span { font-weight: 700; color: var(--primary-color); font-family: monospace; font-size: 1.2rem; }

.bar {
    height: 14px;
    background-color: var(--border-color);
    border-radius: 7px;
    overflow: hidden;
    margin-top: 8px;
    margin-bottom: 10px;
}

.bar i {
    display: block;
    height: 100%;
    transition: width 0.4s ease, background-color 0.3s;
}

@media (max-width: 500px) {
    .controls { flex-direction: column; align-items: stretch; }
}