:root {
    --bg-dark: #0F0F13;
    --bg-surface: #1E1E24;
    --bg-elevated: #2A2A35;
    --border: #333340;
    --text-primary: #EDEDF0;
    --text-secondary: #A0A0B0;
    
    /* Strength Colors */
    --score-0: #EF4444; /* Very Weak */
    --score-1: #F97316; /* Weak */
    --score-2: #FBBF24; /* Fair */
    --score-3: #4ADE80; /* Strong */
    --score-4: #10B981; /* Very Strong */
    
    --radius: 12px;
    --transition: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(20, 20, 30, 0.4), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(30, 20, 40, 0.4), transparent 25%);
}

.container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.text-center {
    text-align: center;
}

.logo {
    color: var(--score-4);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.glass {
    background: rgba(30, 30, 36, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.analyzer-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Input Group */
.input-group {
    position: relative;
    width: 100%;
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input {
    width: 100%;
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 1rem 3rem 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 1.1rem;
    font-family: 'Inter', monospace;
    transition: var(--transition);
}

.password-input:focus {
    outline: none;
    border-color: var(--score-3);
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.15);
}

.toggle-btn {
    position: absolute;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.toggle-btn .hidden {
    display: none;
}

/* Empty State */
.empty-state {
    display: flex; /* controlled by JS */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 0;
    gap: 1rem;
}

.empty-state.hidden {
    display: none;
}

.empty-state svg {
    color: var(--border);
}

.empty-state .note {
    font-size: 0.8rem;
    max-width: 80%;
    margin-top: 1rem;
    opacity: 0.7;
}

/* Results Container */
.results-container {
    display: flex; /* controlled by JS */
    flex-direction: column;
    gap: 1.5rem;
}

.results-container.hidden {
    display: none;
}

/* Strength Meter */
.strength-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.strength-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    font-weight: 500;
}

.strength-meter {
    height: 8px;
    background-color: var(--bg-elevated);
    border-radius: 4px;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    width: 0%;
    border-radius: 4px;
    transition: width 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), background-color 0.4s ease;
}

/* Colors for scores */
.score-text.score-0 { color: var(--score-0); }
.score-text.score-1 { color: var(--score-1); }
.score-text.score-2 { color: var(--score-2); }
.score-text.score-3 { color: var(--score-3); }
.score-text.score-4 { color: var(--score-4); }

.meter-fill.score-0 { width: 10%; background-color: var(--score-0); }
.meter-fill.score-1 { width: 30%; background-color: var(--score-1); }
.meter-fill.score-2 { width: 50%; background-color: var(--score-2); }
.meter-fill.score-3 { width: 75%; background-color: var(--score-3); }
.meter-fill.score-4 { width: 100%; background-color: var(--score-4); }

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-box {
    background-color: var(--bg-elevated);
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    border: 1px solid var(--border);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1rem;
    font-weight: 600;
}

/* Character Classes */
.breakdown-section h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.char-classes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.char-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    background-color: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.char-badge.active {
    background-color: rgba(74, 222, 128, 0.1);
    color: var(--score-3);
    border-color: var(--score-3);
}

/* Feedback Section */
.feedback-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feedback-box {
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.feedback-box.hidden {
    display: none;
}

.feedback-box h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.feedback-box ul {
    list-style-position: inside;
    padding-left: 0.5rem;
}

.feedback-box li {
    margin-bottom: 0.25rem;
}

.feedback-box.warning {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #FCA5A5;
    flex-direction: row;
    align-items: flex-start;
}

.feedback-box.warning svg {
    margin-top: 2px;
    flex-shrink: 0;
}

.feedback-box.tips {
    background-color: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #FCD34D;
}

.feedback-box.info {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}