:root {
    --bg-color: #050505;
    --card-bg: #0a0a0a;
    --border-color: #1a3a1a;
    --text-main: #00ff41;
    --text-dim: #008f11;
    --accent: #00ff41;
    --accent-glow: rgba(0, 255, 65, 0.4);
    
    /* Semantic Colors */
    --color-danger: #ff003c;
    --color-warning: #ffb000;
    --color-info: #00e5ff;
    --color-success: #00ff41;
    --color-success-bright: #baff00;
    --color-bg-light: #111;
    
    --font-mono: 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-mono);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem;
    background-image: 
        radial-gradient(circle at 50% 0%, #001f05 0%, transparent 50%),
        linear-gradient(rgba(0, 255, 65, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 65, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 20px 20px, 20px 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 0 0 10px var(--accent-glow);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.prompt {
    color: var(--text-dim);
}

.subtitle {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5), inset 0 0 10px rgba(0, 255, 65, 0.05);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.5;
}

h2 {
    font-size: 1.1rem;
    color: var(--text-dim);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Inputs & Buttons */
.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

input[type="text"], input[type="password"] {
    flex: 1;
    background: #000;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: var(--font-mono);
    padding: 0.8rem 1rem;
    font-size: 1.1rem;
    border-radius: 2px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="text"]:focus, input[type="password"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.btn {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border-radius: 2px;
    text-transform: uppercase;
    transition: all 0.2s;
    font-weight: 600;
}

.btn:hover {
    background: var(--accent);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-icon {
    padding: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Strength Meter */
.strength-meter {
    margin-bottom: 1.5rem;
}

.meter-bar-container {
    height: 6px;
    background: var(--color-bg-light);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.meter-bar {
    height: 100%;
    width: 0%;
    background: var(--color-bg-light);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.4s ease;
    box-shadow: 0 0 10px currentColor;
}

.meter-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.stat-box {
    background: #000;
    border: 1px solid var(--border-color);
    padding: 1rem;
    text-align: center;
    border-radius: 2px;
}

.stat-label {
    display: block;
    color: var(--text-dim);
    font-size: 0.8rem;
    margin-bottom: 0.3rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Educational Panel */
.section-desc {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.feedback-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.feedback-item {
    background: #000;
    border: 1px solid var(--border-color);
    padding: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    border-radius: 2px;
    transition: all 0.3s;
}

.feedback-item.active {
    border-color: var(--accent);
    box-shadow: 0 0 8px rgba(0, 255, 65, 0.2);
}

.feedback-item.inactive {
    opacity: 0.5;
}

.feedback-icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-bg-light);
}

.feedback-item.active .feedback-icon {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.feedback-item.inactive .feedback-icon {
    background: var(--color-danger);
}

.feedback-content {
    display: flex;
    flex-direction: column;
}

.feedback-pattern {
    font-weight: 700;
    color: #fff;
    font-size: 0.9rem;
}

.feedback-desc {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.entropy-formula {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 255, 65, 0.05);
    border: 1px dashed var(--border-color);
}

/* Generator */
.gen-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}

.checkbox-group {
    display: flex;
    gap: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

input[type="checkbox"] {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
}

.action-row {
    display: flex;
    gap: 1rem;
    align-items: stretch;
}

.generated-output-group {
    display: flex;
    flex: 1;
}

.generated-output-group input {
    margin-bottom: 0;
    border-right: none;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.generated-output-group .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

@media (max-width: 600px) {
    .feedback-list {
        grid-template-columns: 1fr;
    }
    .action-row {
        flex-direction: column;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}