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

body {
    font-family: 'Open Sans', sans-serif;
    background-color: #000;
    color: #fff;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: #ff4a4a;
    margin-bottom: 10px;
    font-family: 'Bangers', cursive;
    font-size: 2.6rem;
    letter-spacing: 1px;
}

.header-subtitle {
    color: #cccccc;
    margin-bottom: 10px;
}

.hero-image {
    max-width: 260px;
    display: block;
    margin: 15px auto 0 auto;
    border-radius: 12px;
}

.category-selector {
    margin-bottom: 20px;
}

.category-selector label {
    font-weight: bold;
    margin-right: 10px;
    color: #cccccc;
}

.category-selector select {
    padding: 8px 12px;
    border: 2px solid #333;
    border-radius: 5px;
    font-size: 16px;
    background: #111;
    color: #fff;
}

.game-area {
    background: #111;
    border-radius: 12px;
    padding: 30px;
    border: 2px solid #222;
}

.progress-info {
    margin-bottom: 25px;
}

.category-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-weight: bold;
    color: #ff4a4a;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #1a1a1a;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4cd964, #ff4a4a);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.completion-message {
    text-align: center;
    padding: 20px;
    background: #111;
    color: #fff;
    border-radius: 12px;
    border: 2px solid #222;
    margin: 20px 0;
}

.completion-message h3 {
    margin-bottom: 15px;
    font-size: 24px;
}

.completion-message p {
    margin: 10px 0;
    font-size: 16px;
}

.idiom-display {
    text-align: center;
    margin-bottom: 30px;
}

#idiom-text {
    font-size: 24px;
    color: #fff;
    font-style: italic;
    padding: 20px;
    background-color: #1a1a1a;
    border-radius: 8px;
    border: 1px solid #333;
}

.choices {
    margin-bottom: 20px;
}

.choice-btn {
    display: block;
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    background-color: #ff4a4a;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.choice-btn:hover {
    background-color: #e63946;
}

.choice-btn.correct {
    background-color: #4cd964;
}

.choice-btn.incorrect {
    background-color: #ff4a4a;
}

.choice-btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.feedback {
    margin: 20px 0;
    padding: 15px;
    border-radius: 5px;
    display: none;
}

.feedback.correct {
    background-color: #112a11;
    color: #4cd964;
    border: 1px solid #4cd964;
}

.feedback.incorrect {
    background-color: #2a1111;
    color: #ff4a4a;
    border: 1px solid #ff4a4a;
}

.example {
    margin: 20px 0;
    padding: 15px;
    background-color: #1a1a1a;
    border-left: 4px solid #ff4a4a;
    border-radius: 5px;
    display: none;
}

.example strong {
    color: #ff4a4a;
}

.controls {
    text-align: center;
    margin-top: 20px;
}

#next-btn, #restart-btn {
    padding: 12px 24px;
    background-color: #ff4a4a;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 0 10px;
}

#next-btn:hover, #restart-btn:hover {
    background-color: #e63946;
}

#restart-btn {
    background-color: #666;
}

#restart-btn:hover {
    background-color: #555;
}

/* Intro Section */
.game-intro {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    margin-bottom: 20px;
}

.intro-card {
    background: #111;
    border: 2px solid #222;
    border-radius: 12px;
    padding: 35px 30px;
    width: 100%;
    max-width: 640px;
    text-align: center;
}

.intro-card h2 {
    color: #ff4a4a;
    font-family: 'Bangers', cursive;
    font-size: 2rem;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.intro-card p {
    color: #cccccc;
    margin-bottom: 12px;
}

.intro-note {
    color: #888;
    font-size: 0.95rem;
}

.start-btn {
    margin-top: 15px;
    background: #ff4a4a;
    color: #ffffff;
    border: none;
    padding: 14px 26px;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.start-btn:hover {
    background: #e63946;
    transform: translateY(-2px);
}

.intro-seo {
    background: #111;
    border: 2px solid #222;
    border-radius: 12px;
    padding: 20px 22px;
    margin: 0 auto;
    text-align: left;
    width: 100%;
    max-width: 640px;
}

.intro-seo h3 {
    color: #ff4a4a;
    font-family: 'Bangers', cursive;
    font-size: 1.5rem;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    text-align: center;
}

.intro-seo a {
    color: #ff4a4a;
    text-decoration: none;
}

.intro-seo a:hover {
    opacity: 0.85;
}

.hidden {
    display: none;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .game-area {
        padding: 20px;
    }
    
    #idiom-text {
        font-size: 20px;
    }
}