body {
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
    background: #f6f8fa;
    margin: 0;
    padding: 0;
}

canvas {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    display: block;
    width: 500px;
    height: 500px;
    image-rendering: pixelated;
    margin-bottom: 12px;
    transition: box-shadow 0.2s;
}

canvas:focus, canvas:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    outline: none;
}

/*div {*/
/*    text-align: center;*/
/*    margin: 10px;*/
/*}*/

button, input {
    margin: 5px;
}

#top {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 50px;
    margin: 40px auto 20px auto;
    max-width: 900px;
}

#canvas-toolbar {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 18px;
    margin-right: 32px;
    min-width: 170px;
    position: relative;
}

#canvas-toolbar label,
#canvas-toolbar input[type="color"],
#canvas-toolbar button {
    margin-bottom: 8px;
}

#canvas-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 18px;
    font-size: 1em;
}

#color-picker {
    margin-left: 8px;
    margin-right: 8px;
    vertical-align: middle;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 4px;
    background: #fff;
    box-shadow: 0 1.5px 4px rgba(0, 0, 0, 0.06);
    cursor: pointer;
}

#clear-canvas {
    background: #e0e0e0;
    color: #333;
}

#clear-canvas:hover {
    background: #1976d2;
    color: #fff;
}

.card-container {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1.5px 4px rgba(0, 0, 0, 0.04);
    padding: 32px 32px 24px 32px;
    margin: 0 auto 32px auto;
    max-width: 420px;
    width: 100%;
}

#gif-preview {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    background: #fafbfc;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    padding: 18px 18px 10px 18px;
    min-width: 270px;
    min-height: 270px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
}

.img-container img {
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 10px;
    background: #fff;
}

button, input[type="submit"], input[type="button"] {
    background: #1976d2;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 10px;
    font-size: 1em;
    font-weight: 800;
    margin: 8px 0;
    cursor: pointer;
    transition: background 0.18s, box-shadow 0.18s;
    box-shadow: 0 1.5px 4px rgba(25, 118, 210, 0.08);
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
    background: #1565c0;
}

input[type="color"] {
    border: none;
    border-radius: 4px;
    width: 36px;
    height: 36px;
    margin-left: 8px;
    background: #fff;
    box-shadow: 0 1.5px 4px rgba(0, 0, 0, 0.06);
    cursor: pointer;
}

input[type="range"] {
    width: 120px;
    margin: 0 8px;
}

form#signup-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1.5px 4px rgba(0, 0, 0, 0.04);
    padding: 32px 32px 24px 32px;
    margin: 32px auto 0 auto;
    max-width: 420px;
    width: 100%;
    gap: 12px;
}

form#signup-form label {
    font-weight: 800;
    font-size: 1.3em;
    margin: 0 0 0 0;
}

form#signup-form input[type="text"] {
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    padding: 5px 5px;
    margin-bottom: 0;
    width: 100%;
    box-sizing: border-box;
    transition: border 0.18s;
    font-size: 1em;
}

form#signup-form input[type="text"]:focus {
    border: 1.5px solid #1976d2;
    outline: none;
}

#instructions {
    color: #555;
    font-size: 1.05em;
    margin: 0 0 0 0;
}

#motivation {
    font-size: 1.2rem;
    margin: 0 0 0 0;
}

h1 {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 700;
    color: #1976d2;
    margin-top: 32px;
    margin-bottom: 18px;
    letter-spacing: -1px;
}

#eraser {
    -webkit-appearance: none;
    position: relative;
    width: 60px;
    height: 20px;
    border-radius: 25px;
    background-color: #ccc;
    transition: background .3s;
    outline: none;
    cursor: pointer;
}

#eraser::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 15%;
    transform: translate(-10%, -50%);
    border-radius: 50%;
    height: 1.25rem;
    width: 1.25rem;
    background-color: rgb(255, 255, 255);
    transition: left .3s;
}

#eraser:checked {
    background-color: rgb(25, 118, 210);
}

#eraser:checked::after {
    left: 70%;
}

@media (max-width: 900px) {
    #top {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    #canvas-toolbar {
        flex-direction: row;
        margin-right: 0;
        margin-bottom: 24px;
        min-width: unset;
        gap: 12px;
    }

    canvas, #gif-preview {
        width: 90vw;
        height: 90vw;
        min-width: 220px;
        min-height: 220px;
        max-width: 95vw;
        max-height: 95vw;
    }
}