body {
    font-family: 'Roboto Condensed', sans-serif;
    background-color: #f4f4f4;
    margin: 20px;
}


/* Website title and things */
.website-title {
    width: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    margin: 50px 0 20px 0;
}
.help-icon {
    display: flex;
    text-align: center;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 32px;
    font-weight: bold;
    border: 3px solid #333;
    border-radius: 50%;
    margin: 0 20px;
    transition: 0.2s;
}
.help-icon:hover {
    scale: 1.2;
    background-color: #333;
    color: #f4f4f4;
    cursor: pointer;
}


/* Simulation section */
.simulation {
    display: flex;
    flex-direction: row;
    justify-content: safe center;
}

.simulation-type { /* simulation buttons */
    display: flex;
    flex-direction: column;
    margin: 20px;
    justify-content: space-between;
}

.simulation-button {
    font-size: 20px;
    padding: 12px 20px;
    width: 220px;
    transition: 0.3s;
    cursor: pointer;
    overflow: hidden;
    border: 2px solid #333;
    border-radius: 15px;
}

.simulation-button:hover {
    scale: 1.2;
}

#center-response-simulation:hover {
    background-color: #FF6666;
}
#surround-response-simulation:hover {
    background-color: #FFB266;
}
#both-response-simulation:hover {
    background-color: #87CEEB;
}
#neither-response-simulation:hover {
    background-color: #98FB98;
}
#custom-response-simulation:hover {
    background-color: #8FBC8F;
}

#radiusSlider {
    margin: 20px;
    display: none; /* changing the size of the circle does not correspond correctly to cells */
}

/* Receptive field simulation */
.simulation-supercontainer {
    display: flex;
    flex-direction: row;
}

.simulation-container {
    display: flex;
    flex-direction: column;
}

.subheading {
    display: flex;
    align-self: center;
    font-size: 20px;
    margin: 20px;
}

.boundary {
    width: 300px;
    height: 300px;
    background-color: lightgray;
    position: relative;
    margin: 20px;
    border: 2px solid #333;
}

.grid-svg { /* the polar-based grid for record purposes */
    width: 240px;
    height: 240px;
    position: absolute;
    top: 30px;
    left: 30px;
}

.circle {
    border-radius: 50%;
}

#surround-area { /* visualizing the receptive field */
    width: 240px;
    height: 240px;
    background-color: #333;
    position: absolute;
    top: 30px;
    left: 30px;
}

#center-area {
    width: 80px;
    height: 80px;
    background-color: #333;
    position: absolute;
    top: 109px;
    left: 109px;
    border: 2px solid #f4f4f4;
}

#draggable-circle {
    width: var(--block-size);
    height: var(--block-size);
    background-color: white;
    position: absolute;
    top: var(--center-position);
    left: var(--center-position);
    cursor: grab;
}


/* 2d simulation container */
.cross-boundary {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 300px;
    height: 300px;
    background-color: lightgray;
    position: relative;
    margin: 20px;
    border: 2px solid #333;
}

.rod-container,
.hc-container,
.bpc-container,
.rgc-container {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    margin: 10px;
}

.surround-rod-container,
.center-rod-container {
    display: flex;
    flex-direction: row;
    width: 90px;
    justify-content: space-evenly;
}

/* Common styles for the cells in the retina */
.surround-rod,
.center-rod, 
.rcone, 
.gcone, 
.bcone, 
.hc, 
.bpc, 
.offbpc, 
.rgc, 
.ac {
    display: block;
    border: 1px solid #333;
}

.surround-rod, .center-rod, .rcone, .gcone, .bcone { /* Rods and Cones */
    height: 50px;
    width: 10px;
    border-radius: 5px;
}

.surround-rod, .center-rod {background-color: #1E3A5F;}

.rcone {background-color: #E63946;}
.gcone {background-color: #5EC93D;}
.bcone {background-color: #3D91C9;}

.hc, .ac { /* Horizontal and Amacrine Cells */
    height: 20px;
    width: 50px;
    border-radius: 10px;
}

.hc {background-color: #F28500;}
.ac {background-color: #00A6A6;}

.bpc, .offbpc, .rgc { /* Bipolar and Retinal Ganglion Cells */
    height: 50px;
    width: 25px;
    border-radius: 25px;
}

.bpc {background-color: #FFD700;}
.offbpc {background-color: #800080;}
.rgc {background-color: #B22222;}


.svg-lines {
    position: absolute;
    top: 0;
    left: 0;
    height: 300px;
    width: 300px;
    pointer-events: none; /* Prevent interference with interactions */
}

.label-container {
    margin: 20px;
}

.spacer1 {height: 100px;}
.spacer2 {height: 45px;}
.spacer3 {height: 45px;}
.spacer4 {height: 65px;}

/* The scale at the bottom of the simulation containers */
.legend-container {
    display: flex;
    flex-direction: column;
    margin: 0 0 20px 0;
}

.scale-label-container {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.color-scale {
    width: 100%;
    height: 20px;
    background: linear-gradient(to right, blue, #808080, yellow);
}

/* spacers and dividers between sections */

.spacer {
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: safe center;
    flex-direction: column;
}

.divider {
    width: 500px;
    height: 5px;
    background-color: #333;
    border-radius: 2px;
}


/* text-based lecture with diagrams */
.lecture-container {
    display: flex;
    flex-direction: column;
    justify-content: safe center;
    align-items: safe center;
}

h2 {
    width: fit-content;
    margin: 20px;
}

.button-supercontainer {
    display: flex;
    flex-direction: row;
}

.button-container {
    display: flex;
    flex-direction: column;
    width: fit-content;
}

.buttons {
    display: block;
    width: 380px;
    padding: 10px;
    margin: 2px;
    font-size: 20px;
    transition: 0.3s;
}

#anatomy-button:hover,
#biochem-button:hover,
#rf-button:hover,
#vis-button:hover {
    scale: 1.1;
    background-color: #333;
    color: #f4f4f4;
    cursor: pointer;
}

.lecture {
    width: 1200px;
    display: flex;
    flex-direction: column;
}

.lecture-title {
    font-size: 20px;
    font-weight: bold;
    margin: 20px;
}

.lecture-supercontainer {
    flex-direction: column;
}

#lecture1-supercontainer {
    display: flex;
    animation: appear 0.5s;
}
#lecture2-supercontainer,
#lecture3-supercontainer,
#lecture4-supercontainer {
    display: none;
    animation: appear 0.5s;
}

@keyframes appear {
    0% {opacity: 0;};
    100% {opacity: 1;};
}

#lecture1-container,
#lecture2-container,
#lecture3-container,
#lecture4-container,
#lecture5-container {
    display: flex;
    flex-direction: row;
}

p {font-size: 20px; line-height: 1.5;}
img {margin: 20px;}
.emphasize {
    transition: 0.3s;
}
.emphasize:hover {
    background-color: #333;
    color: #f4f4f4;
    cursor: default;
}

.lecture-text-container {
    width: 700px;
    margin: 20px;
    height: 500px;
    overflow-y: auto;
}

.lecture-diagram-container {
    width: 500px;
    margin: 20px;
    height: 500px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: lightgray;
}

.image-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.caption {font-weight: bold; margin: 10px 0 50px 0;}

.list {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
}

.indented-list {
    width: 450px;
}

.bullet {
    font-weight: bold;
    color: #333;
    display: inline-block;
    width: 3em; /* Adjust spacing */
}

.bullet-plus {
    font-weight: bold;
    color: #333;
    display: inline-block;
    width: 6em; /* Adjust spacing */
}

.eye-anatomy {
    line-height: 1.5;
}

.small-vertical-scale {
    width: 20px;
    background: linear-gradient(to bottom, blue, #808080, yellow);
}

.small-horizontal-rgb-scale {
    display: flex;
    width: 100%;
    height: 20px;
    background: linear-gradient(to right, #E63946, #5EC93D, #3D91C9);
}

.small-horizontal-bw-scale {
    display: flex;
    width: 100%;
    height: 20px;
    background: linear-gradient(to right, #333, #f4f4f4);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}


/* SCREWING AROUND */
.screwing-around {
    display: flex;
    flex-direction: row;
}


/* COLORS */
.rod-color:hover {background-color: #1E3A5F;}

.cone-color:hover {background: linear-gradient(to right, #E63946, #5EC93D, #3D91C9);}
.rcone-color:hover {background-color: #E63946;}
.gcone-color:hover {background-color: #5EC93D;}
.bcone-color:hover {background-color: #3D91C9;}

.hc-color:hover {background-color: #F28500;}
.ac-color:hover {background-color: #00A6A6;}

.bpc-color:hover {background: linear-gradient(to right, #FFD700, #800080);}
.onbpc-color:hover {background-color: #FFD700;}
.offbpc-color:hover {background-color: #800080;}
.rgc-color:hover {background-color: #B22222;}

.hyp-color:hover {background-color: blue;}
.spont-color:hover {background-color: #808080;}
.dep-color:hover {background-color: yellow; color: black;}


.epilogue {
    display: flex;
    width: 100%;
    justify-content: safe center;
}