@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;700;900&family=Roboto:wght@300;400;500&display=swap');

/* === GLOBAL STYLES === */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --neon-pink: #ff00ff;
    --neon-cyan: #00ffff;
    --neon-yellow: #ffcc00;
    --neon-green: #00ff9d;
    --neon-red: #ff3366;
    --dark-bg: #0d0015;
    --dark-box: rgba(10, 5, 20, 0.85);
}

body {
    font-family: 'Orbitron', 'Arial Black', 'Arial', 'Helvetica Neue', 'Helvetica', sans-serif;
    background: var(--dark-bg);
    color: var(--neon-pink);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255,0,255,0.08) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0,255,255,0.08) 0%, transparent 25%);
    overflow-x: hidden;
}

/* === CONTAINER & LAYOUT === */
#main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.content-box {
    background: var(--dark-box);
    padding: 35px;
    border-radius: 20px;
    border: 2px solid var(--neon-pink);
    box-shadow: 
        0 0 20px var(--neon-pink),
        0 0 40px var(--neon-cyan),
        inset 0 0 30px rgba(255,0,255,0.3);
    position: relative;
    overflow: hidden;
    margin-bottom: 20px;
}

.content-box::before {
    content: "";
    position: absolute;
    top: -50%; left: -50%; right: -50%; bottom: -50%;
    background: radial-gradient(circle, rgba(0,255,255,0.1) 10%, transparent 40%);
    animation: pulse-bg 12s infinite alternate;
    pointer-events: none;
}

/* === TYPOGRAPHY === */
h1 {
    color: var(--neon-cyan);
    text-shadow: 
        0 0 10px var(--neon-cyan),
        0 0 20px var(--neon-cyan),
        0 0 40px var(--neon-pink),
        0 0 80px var(--neon-pink);
    margin-bottom: 30px;
    font-size: 2.4em;
    letter-spacing: 4px;
    text-align: center;
}

h2 {
    color: var(--neon-yellow);
    text-shadow: 0 0 15px var(--neon-yellow);
    margin: 25px 0 20px;
    font-size: 1.8em;
    letter-spacing: 2px;
}

h3 {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
    margin: 20px 0 15px;
    font-size: 1.4em;
    letter-spacing: 1px;
}

p {
    font-family: 'Roboto', 'Arial', 'Helvetica', 'Segoe UI', sans-serif;
    line-height: 1.6;
    margin-bottom: 15px;
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-size: 1.2em;
    font-weight: 700;
    color: var(--neon-cyan);
    background: transparent;
    border: 2px solid var(--neon-cyan);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.4s;
    text-shadow: 0 0 8px var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0,255,255,0.6);
    letter-spacing: 2px;
    font-family: 'Orbitron', 'Arial Black', 'Arial', 'Helvetica Neue', 'Helvetica', sans-serif;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    color: var(--neon-pink);
    border-color: var(--neon-pink);
    box-shadow: 
        0 0 25px var(--neon-pink),
        0 0 50px var(--neon-pink),
        inset 0 0 20px rgba(255,0,255,0.4);
    text-shadow: 0 0 15px var(--neon-pink);
    transform: scale(1.05);
}

.btn-primary {
    background: linear-gradient(45deg, var(--neon-pink), var(--neon-cyan));
    color: #000;
    border: none;
    text-shadow: none;
}

.btn-secondary {
    border-color: var(--neon-yellow);
    color: var(--neon-yellow);
    box-shadow: 0 0 15px rgba(255,204,0,0.6);
}

.btn-block {
    display: block;
    width: 100%;
    margin: 14px 0;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* === CARDS & MODULES === */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.module-card {
    background: rgba(0, 255, 255, 0.08);
    border: 2px solid var(--neon-cyan);
    border-radius: 15px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.35s;
    box-shadow: 0 0 12px rgba(0,255,255,0.5);
    position: relative;
}

.module-card:hover {
    background: rgba(255, 0, 255, 0.15);
    border-color: var(--neon-pink);
    box-shadow: 
        0 0 25px var(--neon-pink),
        0 0 45px var(--neon-pink);
    transform: translateY(-5px);
}

.module-icon {
    font-size: 3em;
    margin-bottom: 15px;
    display: block;
}

.module-title {
    font-size: 1.4em;
    color: var(--neon-cyan);
    margin-bottom: 10px;
    text-shadow: 0 0 10px var(--neon-cyan);
}

.module-description {
    font-family: 'Roboto', sans-serif;
    font-size: 0.95em;
    color: #e0f7ff;
    line-height: 1.5;
}

/* === PROGRESS BARS === */
.progress-container {
    background: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    height: 30px;
    overflow: hidden;
    border: 1px solid var(--neon-cyan);
    margin: 15px 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9em;
    font-weight: bold;
    color: #000;
    box-shadow: 0 0 20px var(--neon-cyan);
}

/* === STATS & BADGES === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-box {
    background: rgba(0, 255, 255, 0.1);
    border: 2px solid var(--neon-cyan);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2.5em;
    color: var(--neon-yellow);
    text-shadow: 0 0 15px var(--neon-yellow);
    display: block;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9em;
    color: var(--neon-cyan);
    font-family: 'Roboto', sans-serif;
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: bold;
    margin: 5px;
    border: 1px solid;
}

.badge-gold {
    background: rgba(255, 204, 0, 0.2);
    border-color: var(--neon-yellow);
    color: var(--neon-yellow);
    box-shadow: 0 0 10px var(--neon-yellow);
}

.badge-silver {
    background: rgba(192, 192, 192, 0.2);
    border-color: #c0c0c0;
    color: #f0f0f0;
    box-shadow: 0 0 10px #c0c0c0;
}

.badge-bronze {
    background: rgba(205, 127, 50, 0.2);
    border-color: #cd7f32;
    color: #ffb366;
    box-shadow: 0 0 10px #cd7f32;
}

/* === FORMS & INPUTS === */
input[type="text"],
textarea {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid var(--neon-cyan);
    border-radius: 8px;
    color: var(--neon-cyan);
    font-family: 'Roboto', sans-serif;
    margin: 10px 0;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--neon-pink);
    box-shadow: 0 0 20px var(--neon-pink);
}

textarea {
    min-height: 120px;
    resize: vertical;
}

/* === QUIZ ELEMENTS === */
.option {
    background: rgba(0, 255, 255, 0.08);
    border: 2px solid var(--neon-cyan);
    color: #e0f7ff;
    padding: 16px;
    margin: 14px 0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.35s;
    box-shadow: 0 0 12px rgba(0,255,255,0.5);
    font-size: 1.2em;
}

.option:hover:not(.disabled) {
    background: rgba(255, 0, 255, 0.25);
    border-color: var(--neon-pink);
    box-shadow: 
        0 0 25px var(--neon-pink),
        0 0 45px var(--neon-pink);
    transform: translateY(-3px);
}

.option.correct {
    background: rgba(0, 255, 157, 0.3);
    border-color: var(--neon-green);
    box-shadow: 0 0 30px var(--neon-green);
}

.option.wrong {
    background: rgba(255, 51, 102, 0.3);
    border-color: var(--neon-red);
    box-shadow: 0 0 30px var(--neon-red);
}

.option.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

#question {
    font-size: 1.6em;
    margin: 35px 0 25px;
    color: var(--neon-yellow);
    text-shadow: 
        0 0 10px var(--neon-yellow),
        0 0 20px var(--neon-pink),
        0 0 30px var(--neon-cyan);
    text-align: center;
}

#feedback {
    margin: 30px 0;
    font-size: 1.5em;
    font-weight: bold;
    min-height: 40px;
    text-shadow: 0 0 15px currentColor;
    text-align: center;
}

#score {
    font-size: 1.4em;
    color: var(--neon-green);
    text-shadow: 0 0 12px var(--neon-green);
    margin: 20px 0;
    text-align: center;
}

/* === VOCABULARY CARDS === */
.vocab-card {
    background: var(--dark-box);
    border: 2px solid var(--neon-cyan);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 0 20px rgba(0,255,255,0.5);
}

.vocab-word {
    font-size: 2.5em;
    color: var(--neon-yellow);
    text-shadow: 0 0 20px var(--neon-yellow);
    margin: 20px 0;
}

.vocab-translation {
    font-size: 1.5em;
    color: var(--neon-cyan);
    font-family: 'Roboto', sans-serif;
}

.vocab-example {
    font-size: 1.1em;
    color: #e0f7ff;
    font-style: italic;
    margin: 15px 0;
    font-family: 'Roboto', sans-serif;
}

.vocab-image {
    max-width: 200px;
    max-height: 200px;
    margin: 20px auto;
    border-radius: 10px;
    border: 2px solid var(--neon-pink);
    box-shadow: 0 0 20px var(--neon-pink);
}

/* === LEVEL & XP === */
.level-display {
    text-align: center;
    margin: 20px 0;
}

.level-number {
    font-size: 3em;
    color: var(--neon-yellow);
    text-shadow: 0 0 30px var(--neon-yellow);
    display: block;
}

.xp-bar-container {
    position: relative;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 20px;
    height: 40px;
    border: 2px solid var(--neon-cyan);
    overflow: hidden;
    margin: 15px 0;
}

.xp-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-yellow));
    transition: width 0.8s ease;
    box-shadow: 0 0 20px var(--neon-green);
}

.xp-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 5px #000;
    z-index: 1;
}

/* === ANIMATIONS === */
@keyframes pulse-bg {
    0% { opacity: 0.4; transform: scale(1); }
    100% { opacity: 0.8; transform: scale(1.3); }
}

@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 20px var(--neon-cyan); }
    50% { box-shadow: 0 0 40px var(--neon-pink), 0 0 60px var(--neon-pink); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-glow {
    animation: glow-pulse 2s infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* === UTILITY CLASSES === */
.hidden {
    display: none !important;
}

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

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

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

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.4em; }
    
    .content-box {
        padding: 20px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 1em;
    }
    
    .module-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .vocab-word {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
    #main-container {
        padding: 10px;
    }
    
    h1 { font-size: 1.5em; }
    
    .stat-value {
        font-size: 2em;
    }
}