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

@media screen and (min-width: 320px) and (max-width: 767px) and (orientation: landscape) {
    html {
        transform: rotate(-90deg);
        transform-origin: left top;
        width: 100vh;
        height: 100vw;
        overflow-x: hidden;
        position: absolute;
        top: 100%;
        left: 0;
    }
}

body {
    font-family: 'Arial', sans-serif;
    transition: background-color 1s ease;
    background-color: #8B0000; /* Deep red initial color */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    color: #ffffff; /* Initial text color for contrast */
    overflow-x: hidden;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 10px 20px 20px; /* Reduced top padding to 10px */
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

h1 {
    margin-bottom: 20px;
    transition: all 0.3s ease;
    font-size: 16px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 8px 0;
    border-radius: 20px;
    margin: 10px auto;
    width: 200px;
    cursor: pointer;
}

h1:hover {
    background-color: rgba(0, 0, 0, 0.7);
    transform: scale(1.05);
}

/* Sequence display */
.sequence-container {
    overflow: hidden;
    width: 100%;
    height: 75vh;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.sequence {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
}

/* Bottom right controls */
.side-controls {
    position: fixed;
    right: 20px;
    bottom: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    z-index: 100;
    padding: 15px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    touch-action: manipulation; /* Prevent double-tap zoom */
    -webkit-touch-callout: none; /* Prevent callout */
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight */
}

/* Position display and scientific notation toggle */
.position-info, 
.sci-notation-toggle {
    margin-top: 20px;
    transition: color 1s ease;
}

#position {
    font-size: 16px;
}

.sci-notation-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 120px;
    background-color: rgba(0, 0, 0, 0.3);
    padding: 8px;
    border-radius: 8px;
}

.sci-notation-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.sci-notation-toggle label {
    cursor: pointer;
    font-size: 14px;
    text-align: center;
}

/* Navigation buttons */
.nav-button {
    z-index: 10;
    font-size: 24px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60px;
    width: 60px;
    border-radius: 50%;
    background-color: rgba(212, 0, 0, 0.8);
    color: white;
    border: none;
    cursor: pointer;
    transition: transform 0.1s;
    touch-action: manipulation; /* Prevent double-tap zoom */
    -webkit-touch-callout: none; /* Prevent callout */
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight */
    user-select: none; /* Prevent text selection */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.nav-button:hover {
    background-color: rgba(255, 0, 0, 1);
}

.nav-button:active {
    transform: scale(0.95);
}

.reset-button {
    background-color: rgba(212, 0, 0, 0.8);
    font-weight: bold;
}

.reset-button:hover {
    background-color: rgba(255, 0, 0, 1);
}

/* Fibonacci numbers styling */
.number {
    margin: 8px 0;
    padding: 5px 0;
    transition: all 0.5s ease;
    white-space: nowrap;
    text-align: center;
    transition: transform 0.5s ease, font-size 0.5s ease, opacity 0.5s ease, color 1s ease;
}

.operator {
    font-size: 2rem;
    font-weight: bold;
    margin: 0;
    padding: 0;
}

.center {
    font-size: 5rem;
    font-weight: bold;
}

.adjacent {
    font-size: 3rem;
}

.further {
    font-size: 2rem;
    opacity: 0.8;
}

.distant {
    font-size: 1.5rem;
    opacity: 0.6;
}

.very-distant {
    font-size: 1rem;
    opacity: 0.4;
}

/* Bottom center controls container - visible on all devices */
.mobile-controls {
    position: fixed;
    bottom: 0px;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 100;
    padding: 5px;
    pointer-events: auto; /* Ensure touch events work */
}

/* Mobile position indicator */
.mobile-position, .title-position {
    font-size: 16px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 8px 0;
    transition: opacity 0.3s;
    border-radius: 20px;
    margin: 10px auto;
    width: 120px;
    cursor: pointer;
}

.title-position {
    width: 180px; /* Slightly wider for title */
    z-index: 110; /* Ensure it's above other elements */
    position: relative; /* Establish z-index context */
}

/* Mobile reset button - hidden by default on desktop */
.mobile-reset-button {
    display: none; /* Hidden on desktop */
    margin: 0 auto 10px auto;
    width: 60px;
    height: 60px;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    border: none;
    outline: none;
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight on iOS */
    z-index: 101;
    cursor: pointer;
    touch-action: manipulation; /* Improve touch interaction */
    user-select: none; /* Prevent text selection */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Mobile styles */
@media (max-width: 768px) {
    .mobile-reset-button {
        display: block; /* Show reset button on mobile */
    }
    
    /* Adjust side controls for mobile */
    .side-controls {
        right: 10px;
        bottom: 70px; /* Position above the mobile bottom controls */
        padding: 10px;
        gap: 10px;
        transform: scale(0.8); /* Make smaller on mobile */
    }
    
    /* Adjust bottom controls on mobile */
    .mobile-controls {
        margin-right: 0; /* Reset margin on mobile */
    }
    


    h1 {
        font-size: 16px;
        margin-bottom: 10px;
        width: 180px;
    }
    
    .center {
        font-size: 3.5rem;
    }
    
    .adjacent {
        font-size: 2.2rem;
    }
    
    .further {
        font-size: 1.5rem;
    }
    
    /* Adjust modal for mobile */
    .modal-content {
        width: 85%;
        margin: 40% auto;
        padding: 15px;
    }
}

.wide-warning { 
    font-size: 1.5rem;
    color: #ffcc00; /* Warning color */
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 10px;
    margin: 350px auto;
	text-align: center;
    width: 100%;
    transition: all 0.3s ease;
    display: none;
	transform: rotate(90deg); 
	

}

/* Ensure adequate space for bottom controls on all devices */
.sequence-container {
    padding-bottom: 50px;
}

/* Modal styles */
.modal {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    opacity: 0;
    transition: opacity 0.8s ease;
}

.modal-content {
    background-color: rgba(0, 0, 0, 0.8);
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #333;
    border-radius: 10px;
    width: 300px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    text-align: center;
    color: white;
    transform: translateY(-50px);
    opacity: 0;
    transition: transform 0.8s ease, opacity 0.8s ease;
}

.modal-header h2 {
    margin: 0 0 15px 0;
    color: white;
    font-size: 24px;
}

.modal-body p {
    margin: 10px 0;
    color: #ddd;
    font-size: 16px;
}

/* Show modal animation */
.modal.show {
    display: block;
    opacity: 1;
}

.modal.show .modal-content {
    transform: translateY(0);
    opacity: 1;
}


.vertical-equal {
    display: inline-block;
    transform: rotate(90deg); /* Rotates the element 90 degrees */
    font-size: 2rem; /* Adjust size as needed */
  }