:root {
    /* Matrix Blue Theme */
    --primary-color: #00aaff;
    /* Bright Blue */
    --bg-color: #ffffff;
    --text-color: #000000;
    --glow-color: #00aaff;
    --dim-color: #aaaaaa;
    --font-family: 'Courier New', Courier, monospace;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    overflow: hidden;
    /* Prevent scrolling */
    user-select: none;
    /* Prevent text selection */
    -webkit-tap-highlight-color: transparent;
}

/* CRT Scanline Effect - Dark lines on light */
.scanline {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom,
            rgba(0, 0, 0, 0),
            rgba(0, 0, 0, 0) 50%,
            rgba(0, 0, 0, 0.1) 50%,
            rgba(0, 0, 0, 0.1));
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 10;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0) 60%, rgba(200, 200, 200, 0.5) 100%);
    pointer-events: none;
    z-index: 9;
}

/* Typography & Buttons */
h1,
h2,
h3,
.display-1 {
    text-shadow: 0 0 5px rgba(0, 170, 255, 0.5);
    letter-spacing: 2px;
}

.btn-outline-dark {
    color: var(--text-color);
    border-color: var(--text-color);
}

.btn-outline-dark:hover {
    background-color: var(--primary-color);
    color: #000;
    box-shadow: 0 0 15px var(--primary-color);
    border-color: var(--primary-color);
    font-weight: bold;
}

/* Game Elements */
#prompt-text {
    font-size: 1.5rem;
    line-height: 1.6;
    max-width: 80%;
    margin: 0 auto;
    text-align: center;
    color: var(--text-color);
    font-weight: bold;
}

.highlight-word {
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--primary-color);
    font-weight: bold;
}

#quiz-word {
    font-size: 4rem;
    transition: transform 0.1s;
    /* Ensure text shadow is applied via JS for specific colors if needed,
       but default to a subtle shadow for better contrast */
    text-shadow: 0 0 2px rgba(0, 0, 0, 0.2);
}

/* Timer Bar */
.progress-container {
    width: 80%;
    height: 10px;
    background-color: #ddd;
    /* Light gray background */
    margin: 0 auto;
    border: 1px solid #bbb;
    position: relative;
}

.progress-bar-custom {
    height: 100%;
    background-color: var(--primary-color);
    width: 100%;
    box-shadow: 0 0 5px var(--primary-color);
    transition: width linear;
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.glitch-text {
    position: relative;
    color: var(--text-color);
}

/* Feedback */
#feedback-overlay {
    background-color: rgba(255, 255, 255, 0.8);
    /* Light overlay */
    z-index: 20;
    pointer-events: none;
}

.feedback-correct {
    color: #0088cc;
    /* Darker Blue */
    text-shadow: 0 0 10px rgba(0, 170, 255, 0.2);
}

.feedback-wrong {
    color: #cc0000;
    /* Darker Red */
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.2);
}

/* Mobile adjustments */
@media (max-width: 576px) {
    #quiz-word {
        font-size: 3rem;
    }

    #prompt-text {
        font-size: 1.2rem;
    }
}

.instruction-text {
    color: #333333;
    /* Dark gray for light bg */
    text-shadow: none;
    font-weight: 500;
}

.blink-text {
    animation: blink 2s infinite;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

#level-overlay {
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 25;
}

#level-text {
    color: var(--primary-color);
    text-shadow: 0 0 20px var(--primary-color);
}

/* Choice Button Animations */
.choice-btn {
    transition: all 0.1s ease;
    opacity: 0;
    /* Hidden by default for animation */
    transform: scale(0.9);
}

.choice-btn.visible {
    opacity: 1;
    transform: scale(1);
}

.btn-appear {
    animation: appearGlow 0.5s ease-out forwards;
}

@keyframes appearGlow {
    0% {
        opacity: 0;
        transform: scale(0.8);
        box-shadow: 0 0 0 rgba(0, 170, 255, 0);
    }

    50% {
        opacity: 1;
        transform: scale(1.05);
        box-shadow: 0 0 20px rgba(0, 170, 255, 0.8);
        background-color: rgba(0, 170, 255, 0.1);
    }

    100% {
        opacity: 1;
        transform: scale(1);
        box-shadow: 0 0 0 rgba(0, 170, 255, 0);
        background-color: transparent;
    }
}

.choice-selected {
    background-color: var(--primary-color) !important;
    color: #fff !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 30px var(--primary-color), 0 0 60px var(--primary-color) !important;
    transform: scale(1.1) !important;
    z-index: 10;
}

/* Grid Animations */
.fade-out {
    animation: fadeOut 0.5s forwards;
    pointer-events: none;
    /* Prevent clicks while fading */
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

/* Button Glow Effect */
.btn-glow {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 170, 255, 0.3);
    border: 1px solid rgba(0, 170, 255, 0.5);
}

.btn-glow:hover {
    box-shadow: 0 0 20px rgba(0, 170, 255, 0.8), 0 0 40px rgba(0, 170, 255, 0.4);
    transform: scale(1.05);
    background-color: var(--primary-color);
    color: #000;
    border-color: var(--primary-color);
    font-weight: bold;
}

.btn-glow:active {
    transform: scale(0.95);
    box-shadow: 0 0 5px rgba(0, 170, 255, 0.8);
}

/* Screen Transitions */
.screen-fade-out {
    animation: screenFadeOut 0.5s forwards;
    pointer-events: none;
}

.screen-fade-in {
    animation: screenFadeIn 0.5s forwards;
}

@keyframes screenFadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }

    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

@keyframes screenFadeIn {
    from {
        opacity: 0;
        transform: scale(1.05);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hidden-instant {
    opacity: 0 !important;
    pointer-events: none !important;
    transition: none !important;
}

/* Anomaly Warning */
.anomaly-text {
    color: #ff0000;
    /* Red */
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    font-size: 1rem;
    text-shadow: 0 0 10px #ff0000;
    margin-top: 5px;
    letter-spacing: 5px;
}

.blinking {
    animation: blinker 0.5s linear infinite;
}

@keyframes blinker {
    50% {
        opacity: 0;
    }
}

/* Mobile adjustments for footer overlap */
@media (max-width: 768px) {
    .content-wrapper {
        padding-bottom: 60px !important;
    }

    /* Reduce font size for long words on mobile */
    .choice-btn[data-word="interlinked"] {
        font-size: 0.8rem !important;
        padding-left: 2px !important;
        padding-right: 2px !important;
    }

    /* General mobile button adjustment */
    .choice-btn {
        font-size: 0.9rem;
    }
}

/* Heartbeat Animation */
@keyframes heartbeat {
    0% {
        opacity: 0.3;
        transform: scale(0.95);
    }

    50% {
        opacity: 1;
        transform: scale(1.05);
    }

    100% {
        opacity: 0.3;
        transform: scale(0.95);
    }
}

.heartbeat {
    animation: heartbeat 1.5s infinite ease-in-out;
    color: var(--primary-color) !important;
    text-shadow: 0 0 10px var(--primary-color);
}